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D-Link ™ DES-3350SR
Standalone Layer 3 Switch
User’s Guide
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D-Link DES-3350SR Standalone Layer 3 Switch
____________________
Information in this document is subject to change without notice.
© 2005 D-Link Computer Corporation. All rights reserved.
Reproduction in any manner whatsoever without the written permission of D-Link Computer Corporation is strictly forbidden.
Trademarks used in this text: D-Link and the D-Link logo are trademarks of D-Link Computer Corporation; Microsoft and Windows are registered trademarks of
Microsoft Corporation.
Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products. D-Link Computer
Corporation disclaims any proprietary interest in trademarks and trade names other than its own.
March 2005 P/N 651SR3350035
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D-Link DES-3350SR Standalone Layer 3 Switch
Table of Contents
Preface ............................................................................................................................................................vi
Intended Readers ............................................................................................................................................vi
Notes, Notices, and Cautions ......................................................................................................................vi
Safety Instructions .................................................................................................................................... vii
General Precautions for Rack-Mountable Products ................................................................................ viii
Protecting Against Electrostatic Discharge ............................................................................................. viii
Introduction ........................................................................................................................................................ 1
Fast Ethernet Technology...............................................................................................................................1
Gigabit Ethernet Technology.......................................................................................................................... 1
Switching Technology....................................................................................................................................1
Performance Features ..................................................................................................................................... 1
Software Features ........................................................................................................................................... 2
CoS ............................................................................................................................................................. 2
Spanning Tree.............................................................................................................................................2
VLAN ......................................................................................................................................................... 2
IP Multicast................................................................................................................................................. 2
Configuration.............................................................................................................................................. 2
Management ............................................................................................................................................... 2
MIB Support...............................................................................................................................................3
RMON ........................................................................................................................................................ 3
Port Configuration and Monitoring ............................................................................................................ 3
Port Trunking.............................................................................................................................................. 3
Routing Protocol......................................................................................................................................... 3
Security....................................................................................................................................................... 3
Access Control List support (ACL)............................................................................................................3
Unpacking and Setup......................................................................................................................................... 5
Unpacking....................................................................................................................................................... 5
Installation......................................................................................................................................................5
Desktop or Shelf Installation ...................................................................................................................... 5
Rack Installation......................................................................................................................................... 5
Power on......................................................................................................................................................... 6
Power Failure..............................................................................................................................................6
Identifying External Components .......................................................................................................................7
Front Panel...................................................................................................................................................... 7
Rear Panel....................................................................................................................................................... 7
Side Panels ...................................................................................................................................................... 7
Gigabit Combo Ports ...................................................................................................................................... 8
LED Indicators................................................................................................................................................ 8
Connecting the Switch ........................................................................................................................................9
Switch to End Node........................................................................................................................................9
Switch to Hub or Switch................................................................................................................................. 9
10BASE-T Device ...................................................................................................................................... 9
100BASE-TX Device ................................................................................................................................. 9
Introduction to Switch Management ................................................................................................................10
Management Options .................................................................................................................................... 10
Web-based Management Interface ............................................................................................................... 10
SNMP-Based Management .......................................................................................................................... 10
Command Line Console Interface Through the Serial Port ......................................................................... 10
Connecting the Console Port (RS-232 DCE) ........................................................................................... 10
First Time Connecting to The Switch........................................................................................................... 11
Password Protection...................................................................................................................................... 12
SNMP Settings..............................................................................................................................................13
Traps ......................................................................................................................................................... 13
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MIBs ......................................................................................................................................................... 14
IP Address Assignment.................................................................................................................................14
Connecting Devices to the Switch................................................................................................................ 15
Web-based Switch Management...................................................................................................................... 16
Introduction................................................................................................................................................... 16
Login to Web Manager ................................................................................................................................. 16
User Accounts Management ......................................................................................................................... 16
Admin and User Privileges.......................................................................................................................17
Save Changes................................................................................................................................................17
Areas of the User Interface ........................................................................................................................... 18
Web Pages .................................................................................................................................................... 19
Configuration.................................................................................................................................................... 20
IP Address..................................................................................................................................................... 20
Switch Information ....................................................................................................................................... 22
Advanced Settings ........................................................................................................................................ 22
Port Description............................................................................................................................................ 23
Port Configuration........................................................................................................................................24
Port Mirroring...............................................................................................................................................26
IGMP ............................................................................................................................................................ 27
IGMP Snooping........................................................................................................................................27
Static Router Ports Entry .......................................................................................................................... 28
Spanning Tree...............................................................................................................................................29
STP Switch Settings ................................................................................................................................. 30
STP Port Settings......................................................................................................................................31
Unicast Forwarding .................................................................................................................................. 33
Multicast Forwarding................................................................................................................................ 34
VLANs.......................................................................................................................................................... 35
Static VLAN Entry...................................................................................................................................36
Port VLAN ID(PVID) .............................................................................................................................. 38
Port Bandwidth............................................................................................................................................. 41
SNTP Settings............................................................................................................................................... 42
Current Time Settings ............................................................................................................................... 43
Time Zone and DST.................................................................................................................................43
Port Security.............................................................................................................................................44
QOS (Quality of Service) ............................................................................................................................. 46
Traffic Control.......................................................................................................................................... 46
802.1p Default Priority............................................................................................................................. 47
802.1p User Priority.................................................................................................................................. 48
Scheduling ................................................................................................................................................ 49
Traffic Segmentation................................................................................................................................49
LACP ............................................................................................................................................................ 50
Link Aggregation...................................................................................................................................... 50
LACP Port ................................................................................................................................................ 53
Access Profile Table ..................................................................................................................................... 54
IP-MAC Binding .......................................................................................................................................... 66
IP-MAC Binding Port...............................................................................................................................66
IP-MAC Binding Table ............................................................................................................................ 67
IP-MAC Binding Blocked ........................................................................................................................ 68
Port Access Entity (802.1X) ......................................................................................................................... 68
Configure Authenticator ........................................................................................................................... 73
Port Capability Settings ............................................................................................................................ 75
Initialize Ports for Po rt Based 802.1x....................................................................................................... 76
Initializing Ports for MAC Based 802.1x ................................................................................................. 77
Reauthenticate Ports for Port Based 802.1x ............................................................................................. 78
Reauthenticate Ports for MAC -based 802.1x........................................................................................... 78
RADIUS Server ........................................................................................................................................ 79
Management..................................................................................................................................................... 80
Security IP .................................................................................................................................................... 80
User Accounts............................................................................................................................................... 80
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SNMPV3....................................................................................................................................................... 81
SNMP User Table ..................................................................................................................................... 81
SNMP View Table .................................................................................................................................... 82
SNMP Group Table .................................................................................................................................. 83
SNMP Community Table ......................................................................................................................... 85
SNMP Host Table ..................................................................................................................................... 86
SNMP Engine ID...................................................................................................................................... 87
Layer 3 IP Networking ...................................................................................................................................... 88
IP Interface Settings...................................................................................................................................... 88
Layer 3 Global Settings ................................................................................................................................ 90
MD5 Key Table Settings .............................................................................................................................. 90
Route Redistribution Settings ....................................................................................................................... 91
Static/Default Route Settings ........................................................................................................................ 92
Static ARP Settings.......................................................................................................................................93
RIP ................................................................................................................................................................ 94
RIP Interface Settings ............................................................................................................................... 95
OSPF............................................................................................................................................................. 96
OSPF General Settings ........................................................................................................................... 109
OSPF Area Setting.................................................................................................................................. 110
OSPF Interface Settings.......................................................................................................................... 111
OSPF Virtual Link Settings .................................................................................................................... 113
OSPF Area Aggregation Settings ........................................................................................................... 114
OSPF Host Route Settings ...................................................................................................................... 115
DHCP / BOOTP Relay ............................................................................................................................... 116
DHCP / BOOTP Relay Information ....................................................................................................... 116
DHCP/BOOTP Relay Interface Settings ................................................................................................ 117
DNS Relay.................................................................................................................................................. 117
DNS Relay Information.......................................................................................................................... 118
DNS Relay Static Settings ...................................................................................................................... 118
IP Multicast Routing Protocol....................................................................................................................119
IGMP Interface Settings ......................................................................................................................... 120
DVMRP Interface Settings ..................................................................................................................... 121
PIM ......................................................................................................................................................... 122
Monitoring....................................................................................................................................................... 125
CPU Utilization..........................................................................................................................................125
Port Utilization............................................................................................................................................ 126
Packets ........................................................................................................................................................ 126
Received (RX) ........................................................................................................................................ 127
UMB-cast (RX) ...................................................................................................................................... 128
Transmitted (TX) .................................................................................................................................... 130
Errors .......................................................................................................................................................... 131
Received (RX) ........................................................................................................................................ 131
Transmitted (TX) .................................................................................................................................... 133
Size ............................................................................................................................................................. 134
Packet Size .............................................................................................................................................. 134
MAC Address ............................................................................................................................................. 136
ARP Table .................................................................................................................................................. 137
IGMP Snooping Group ............................................................................................................................... 138
IGMP Snooping Forwarding ...................................................................................................................... 138
VLAN Status .............................................................................................................................................. 139
Router Port..................................................................................................................................................139
Power Status ............................................................................................................................................... 140
Port Access Control....................................................................................................................................140
Authenticator State ................................................................................................................................. 140
Layer 3 Features ......................................................................................................................................... 141
IP Address............................................................................................................................................... 141
Routing Table ......................................................................................................................................... 141
IP Multicast Forwarding Table...................................................................................................................142
IGMP Group Table ..................................................................................................................................... 142
OSPF Monitoring........................................................................................................................................ 143
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OSPF LSDB Table ................................................................................................................................. 143
OSPF Neighbor Table.............................................................................................................................144
OSPF Virtual Neighbor .......................................................................................................................... 144
DVMRP Monitoring...................................................................................................................................144
DVMRP Routing Table .......................................................................................................................... 145
DVMRP Neighbor Table........................................................................................................................145
DVMRP Routing Next Hop Table ......................................................................................................... 145
PIM Monitoring..........................................................................................................................................145
PIM Neighbor Table ............................................................................................................................... 145
Maintenance ................................................................................................................................................... 147
TFTP Utilities ............................................................................................................................................. 147
Download Firmware from Server ........................................................................................................... 147
Download Settings from TFTP Server...................................................................................................147
Upload Settings to TFTP Server.............................................................................................................147
Upload Log to TFTP Server...................................................................................................................148
Switch History............................................................................................................................................148
Ping Test.....................................................................................................................................................149
Save Changes..............................................................................................................................................149
Reboot Services .......................................................................................................................................... 149
Reboot.....................................................................................................................................................150
Reset ....................................................................................................................................................... 150
Reset System........................................................................................................................................... 150
Reset Config ........................................................................................................................................... 150
Logout ..................................................................................................................................................... 150
Appendix A...................................................................................................................................................... 151
Technical Specifications ............................................................................................................................. 151
Appendix B...................................................................................................................................................... 153
Warranty and Registration............................................................................................................................. 160
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Preface
The DES-3350SR Manual is divided into sections that describe the system installation and operating instructions with examples.
Section 1, Introduction - Describes the Switch and its features.
Section 2, Unpacking and Setup- Helps you get started with the basic installation of the Switch and also describes the front panel,
rear panel, side panels, and LED indicators of the Swi tch.
Section 3, Identifying External Components - Tells how you can connect the Switch to your Ethernet network.
Section 4, Connecting The Switch - This chapter describes how to connect the DES-3350SR to your Ethernet/Fast
Ethernet/Gigabit Ethernet network.
Section 5, Introduction to Switch Management- This chapter discusses many of the concepts and features used to manage the
switch, as well as the concepts necessary for the user to understand the functioning of the switch.
Section 6, Web-Based Switch Management - Introduces basic Switch management features, including password protection,
SNMP Settings, IP Address assignment and connecting devices to the Switch.
Section 7, Configuration - A detailed discussion about configuring some of the basic functions of the Switch, including accessing
the Switch information, using the Switch's utilities and setting up network configurations, such as Quality of Service, Access
Profile Table, Port Mirroring and configuring the Spanning Tree.
Section 8, Management – A detailed discussion regarding the Simple Network Management Protocol including description of
features and a brief introduction to SNMP.
Section 9 Layer 3 IP Management - A detailed discussion of Layer3 features including IP Interface Settings, Layer 3 Global
Settings, MD5 Key Table Settings, Route Redistribution Settings, Static/Default Route Settings, Static ARP Settings, RIP, OSPF,
DHCP/Bootp Relay, DNS Relay, and IP Multicast Routing Protocol
Section 10, Monitoring - Features graphs and screens used in monitoring features and packets on the Switch.
Section 11, Maintenance - Features information on Switch utility functions, including TFTP Services, Switch History, Ping Test,
Save Changes and Rebooting Services.
Appendix A, Technical Specifications - The technical specifications of the Switch.
Appendix B, Understanding and Troubleshooting Spanning Tree Protocol - A detailed description of Spanning tree Protocol.
Intended Readers
The DES-3350SR User’s Guide contains information for setup and management of the DES-3350SR switch. This guide is intended
for network managers familiar with network management concepts and terminology.
Notes, Notices, and Cautions
NOTE: A NOTE indicates important information that helps you make
better use of your device.
NOTICE: A NOTICE indicates either potential damage to hardware or loss
of data and tells you how to avoid the problem.
CAUTION: A CAUTION indicates a potential for property damage,
personal injury, or death.
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D-Link DES-3350SR Standalone Layer 3 Switch
Safety Instructions
Use the following safety guidelines to ensure your own personal safety and to help protect your system from potential damage.
Throughout this safety section, the caution icon is used to indicate cautions and precautions that you need to review and follow.
Safety Cautions
To reduce the risk of bodily injury, electrical shock, fire, and damage to the equipment, observe the following precautions.
Observe and follow service markings. Do not service any product except as explained in your system documentation. Opening or
removing covers that are marked with the triangular symbol with a lightning bolt may expose you to electrical shock. Only a
trained service technician should service components inside these compartments.
If any of the following conditions occur, unplug the product from the electrical outlet and replace the part or contact your trained
service provider:
• The power cable, extension cable, or plug is damaged.
• An object has fallen into the product.
• The product has been exposed to water.
• The product has been dropped or damaged.
• The product does not operate correctly when you follow the operating instructions.
• Keep your system away from radiators and heat sources. Also, do not block cooling vents.
• Do not spill food or liquids on your system components, and never operate the product in a wet environment. If the system
gets wet, see the appropriate section in your troubleshooting guide or contact your trained service provider.
• Do not push any objects into the openings of your system. Doing so can cause fire or electric shock by shorting out
interior components.
• Use the product only with approved equipment.
• Allow the product to cool before removing covers or touching internal components.
• Operate the product only from the type of external power source indicated on the electrical ratings label. If you are not
sure of the type of power source required, consult your service provider or local power company.
• To help avoid damaging your system, be sure the voltage selection switch (if provided) on the power supp ly is set to
match the power available at your location:
• 115 volts (V)/60 hertz (Hz) in most of North and South America and some Far Eastern countries such as South Korea and
Taiwan
• 100 V/50 Hz in eastern Japan and 100 V/60 Hz in western Japan
• 230 V/50 Hz in most of Europe, the Middle East, and the Far East
• Also be sure that attached devices are electrically rated to operate with the power available in your location.
• Use only approved power cable(s). If you have not been provided with a power cable for your system or for any AC-
powered option intended for your system, purchase a power cable that is approved for use in your country. The power
cable must be rated for the product and for the voltage and current marked on the product's electrical ratings label. The
voltage and current rating of the cable should be greater than the ratings marked on the product.
• To help prevent electric shock, plug the system and peripheral power cables into properly grounded electrical outlets.
These cables are equipped with thre e-prong plugs to help ensure proper grounding. Do not use adapter plugs or remove
the grounding prong from a cable. If you must use an extension cable, use a 3-wire cable with properly grounded plugs.
• Observe extension cable and power strip ratings. Make sure that the total ampere rating of all products plugged into the
extension cable or power strip does not exceed 80 percent of the ampere ratings limit for the extension cable or power
strip.
• To help protect your system from sudden, transient increases and decreases in electrical power, use a surge suppressor,
line conditioner, or uninterruptible power supply (UPS).
• Position system cables and power cables carefully; route cables so that they cannot be stepped on or tripped over. Be sure
that nothing rests on any cables.
• Do not modify power cables or plugs. Consult a licensed electrician or your power company for site modifications.
Always follow your local/national wiring rules.
• When connecting or disconnecting power to hot-pluggable power supplies, if offered with your system, observe the
following guidelines:
• Install the power supply before connecting the power cable to the power supply.
• Unplug the power cable before removing the power supply.
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• If the system has multiple sources of power, disconnect power from the system by
• Unplug all power cables from the power supplies.
• Move products with care; ensure that all casters and/or stabilizers are firmly connected to the system. Avoid sudden stops
and uneven surfaces.
General Precautions for Rack-Mountable Products
Observe the following precautions for rack stability and safety. Also refer to the rack installation documentation accompanying the
system and the rack for specific caution statements and procedures.
Systems are considered to be components in a rack. Thus, "component" refers to any system as well as to various peripherals or
supporting hardware.
CAUTION: Installing systems in a rack without the front and side
stabilizers installed could cause the rack to tip over, potentially resulting in
bodily injury under certain circumstances. Therefore, always install the
stabilizers before installing components in the rack.
After installing system/components in a rack, never pull more than one
component out of the rack on its slide assemblies at one time. The wei ght
of more than one extended component could cause the rack to tip over
• Before working on the rack, make sure that the stabilizers are secured to the rack, extended to the floor, and that the full
weight of the rack rests on the floor. Install front and side stabilizers on a single rack or front stabilizers for joined
multiple racks before working on the rack. Always load the rack from the bottom up, and load the heaviest item in the
rack first.
and may result in serious injury.
• Make sure that the rack is level and stable before extending a component from the rack.
• Use caution when pressing the component rail release latches and sliding a component into or out of a rack; the slide rails
can pinch your fingers.
• After a component is inserted into the rack, carefully extend the rail into a locking position, and then slide the component
into the rack.
• Do not overload the AC supply branch circuit that provides power to the rack. The total rack load should not exceed 80
percent of the branch circuit rating.
• Ensure that proper airflow is provided to components in the rack.
• Do not step on or stand on any component when servicing other components in a rack.
NOTE: A qualified electrician must perform all connections to DC power
and to safety grounds. All electrical wiring must comply with applicable
local or national codes and practices.
CAUTION: Never defeat the ground conductor or operate the equipment
in the absence of a suitably installed ground conductor. Contact the
appropriate electrical inspection authority or an electrician if you are
uncertain that suitable grounding is available.
CAUTION: The system chassis must be positively grounded to the rack
cabinet frame. Do not attempt to connect power to the system until
grounding cables are connected. Completed power and safety ground
wiring must be inspected by a qualified electrical inspector. An energy
hazard will exist if the safety ground cable is omitted or disconnected.
Protecting Against Electrostatic Discharge
Static electricity can harm delicate components inside your system. To prevent static damage, discharge static electricity from your
body before you touch any of the electronic components, such as the microprocessor. You can do so by periodically touching an
unpainted metal surface on the chassis.
You can also take the following steps to prevent damage from electrostatic discharge (ESD):
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1. When unpacking a static-sensitive component from its shipping carton, do not remove the component from the
antistatic packing material until you are ready to install the component in your system. Just before unwrapping
the antistatic packaging, be sure to discharge static electricity from your body.
2. When transporting a sensitive component, first place it in an antistatic container or packaging.
3. Handle all sensitive components in a static-safe area. If possible, use antistatic floor pads and workbench pads
and an antistatic grounding strap.
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D-Link DES-3350SR Standalone Layer 3 Switch
Section 1
Introduction
Fast Ethernet Technology
Gigabit Ethernet Technology
Switch Stacking
Performance Features
Ports
This section describes the functionality features of the DES-3350SR.
Fast Ethernet Technology
100Mbps Fast Ethernet (or 100BASE-T) is a standard specified by the IEEE 802.3 LAN committee. It is an extension of the
10Mbps Ethernet standard with the ability to transmit and receive data at 100Mbps, while maintaining the Carrier Sense Multiple
Access with Collision Detection (CSMA/CD) Ethernet protocol.
Gigabit Ethernet Technology
Gigabit Ethernet is an extension of IEEE 802.3 Ethernet utilizing the same packet structure, format, and support for full duplex and
management objects, but with a tenfold increase in theoretical throughput over 100Mbps Fast Ethernet and a one hundred-fold
increase over 10Mbps Ethernet. Since it is compatible with all 10Mbps and 100Mbps Ethernet environments, Gigabit Ethernet
provides a straightforward upgrade without wasting a company’s existing investment in hardware, software, and trained personnel.
Switching Technology
Another key development pushing the limits of Ethernet technology is in the field of switching technology. A switch bridges
Ethernet packets at the MAC address level of the Ethernet protocol transmitting among connected Ethernet or Fast Ethernet LA N
segments.
Switching is a cost -effective way of increasing the total network capacity available to users on a local area network. A switch
increases capacity and decreases network loading by making it possible for a local area network to be divided into different
segments, which are not competing with each other for network transmission capacity, and therefore decreasing the load on each
segment.
The Switch acts as a high-speed selective bridge between the individual segments. Traffic that needs to go from one segment to
another (from one port to another) is automatically forwarded by the Switch, without interfering with any other segments (ports).
This allows the total network capacity to be multiplied, while still maintaining the same network cabling and adapter cards.
For Fast Ethernet or Gigabit Ethernet networks, a switch is an effective way of eliminating problems of chaining hubs beyond the
"two-repeater limit." A switch can be used to split parts of the network into different collision domains, for example, making it
possible to expand your Fast Ethernet network beyond the 205 -meter network diameter limit for 100BASE-TX networks. Switches
supporting both traditional 10Mbps Ethernet and 100Mbps Fast Ethernet are also ideal for bridging between existi ng 10Mbps
networks and new 100Mbps networks.
Switching LAN technology is a marked improvement over the previous generation of network bridges, which were characterized
by higher latencies. Routers have also been used to segment local area networks, but the cost of a router and the setup and
maintenance required make routers relatively impractical. Today's switches are an ideal solution to most kinds of local area
network congestion problems.
Performance Features
Switch performance features include:
• 64 Byte system packet forwarding rate (up to 10.1 million packets per second)
• Full-wire speed (full -duplex) operation on all ports including Gigabit ports.
• 4 Priority Queues per port
• MAC Address Table supports 8K MAC addresses
• IP Address Table supports 2K IP entries
• Packet Buffer Memory supports 64 M bytes buffer memory per device
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D-Link DES-3350SR Standalone Layer 3 Switch
Software Features
Switch software features include:
CoS
• Classification based on 802.1P Priority
• Number of priority queues supported
• Based on TOS field on IP header
• DSCP
• Classification based on IP Destination and Source Addresses (Based on Layer 3 information)
• Classification based on TCP/UDP port number
• Classification based on MAC SA/DA
Spanning Tree
• 802.1D Spanning tree compatible
• 802.1w Rapid Spanning Tree support
VLAN
• 802.1Q support
• GARP/GVRP
• Number of VLANs supported per device
IP Multicast
• IGMP Snooping
• IGMP v2
• DVMRP
• PIM Dense mode support
Configuration
• Telnet Server
• TFTP Client
• BootP Client
• DHCP Client
• DHCP/BootP Relay
• DNS Relay support
Management
• Password enabled
• Web-based support
• SNMP v1 support
• SNMP v2c support
• SNMP v3 support
• TFTP upgrade
• Command Line Interface
• SNTP support
• Traffic Segmentation
• Bandwidth control
• Broadcast storm control
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• Support Port Security function
• Support Cisco-like Port Security function
• Web GUI Traffic Monitoring
• Web MAC address browsing
• SNMP Trap on MAC Notification
• Delete individual IP address by dynamic learning (ARP table editing)
• Port Description
• CPU Utilization Monitoring
• Add ‘Show Config’ command
• Enlarge static ARP entries to 255
MIB Support
• RFC1213 MIB II
• RFC1493 Bridge
• RFC1757 RMON
• RFC 1643 Ether-like MIB
• Private MIB
• IGMP MIB
• 802.1p RFC2674
• RFC 2233 – Evolution of the Interfaces Group of MIB II (Receive Address Group is not supported)
• RIP MIB
• OSPF RFC1850
• CIDR MIB RFC2096
RMON
• 4 Groups of RMON (Statistic s, History, Alarms, Events)
Port Configuration and Monitoring
• Auto-Negotiation Support
• Port Mirroring
Port Trunking
• Static mode trunking
• 802.3ad LACP
Routing Protocol
• RIP I/II
• OSPF support
• Floating static route
Security
• Supports 802.1X Port-based Access Control
• Supports 802.1X MAC-based Access Control
• Radius Client for 802.1x support
Access Control List support (ACL)
• Based on MAC address
• Based on VLAN
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D-Link DES-3350SR Standalone Layer 3 Switch
• Based on IP address
• Based on TCP/UDP port number
• Based on 802.1p priority
• Based on DSCP
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D-Link DES-3350SR Standalone Layer 3 Switch
Section 2
Unpacking and Setup
Unpacking
Installation
Power On
This chapter provides unpacking and setup information for the Switch.
Unpacking
Open the shipping carton of the Switch and carefully unpack its contents. The carton should contain the following items:
• One DES-3350SR Stackable layer 3 Switch
• Mounting kit: 2 mounting brackets and screws
• Four rubber feet with adhesive backing
• One AC power cord
• This User’s Guide with Registration Card
If any item is found missing or damaged, please contact your local D -Link reseller for replacement.
Installation
Use the following guidelines when choosing a place to install the Switch:
• The surface must support at least 5 kg
• The power outlet should be within 1.82 meters (6 feet) of the device
• Visually inspect the power cord and see that it is secured to the AC power connector
• Make sure that there is proper heat dissipation from and adequate ventilation around the switch.
• Do not place heavy objects on the switch
Desktop or Shelf Installation
When installing the Switch on a desktop or shelf, the rubber feet included with the device should first be attached. Attach these
cushioning feet on the bottom at each corner of the device. Allow adequate space for ventilation between the device and the objects
around it.
Figure 2 - 1. Installing rubber feet for desktop installation
Rack Installation
The DES-3350SR can be mounted in an EIA standard-sized, 19-inch rack, which can be placed in a wiring closet with other
equipment. To install, attach the mounting brackets on the switch’s side panels (one on each side) and secure them with the screws
provided.
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D-Link DES-3350SR Standalone Layer 3 Switch
Figure 2 - 2. Attaching the mounting brackets to the switch
Then, use the screws provided with the equipment rack to mount the switch on the rack.
Figure 2 - 3. Installing the switch on an equipment rack
Power on
The DES-3350SR switch can be used with AC power supply 100 - 240 VAC, 50 - 60 Hz. The power switch is located at the rear of
the unit adjacent to the AC power connector and the system fan. The switch’s power supply will adjust to the local power source
automatically and may be turned on without having any or all LAN segment cables connected.
After the power switch is turned on, the LED indicators should respond as follows:
• All LED indicators will momentarily blink. This blinking of the LED indicators represents a reset of the system
• The power LED indicator is always on after the power is turned ON
• The console LED indicator will blink while the Switch loads onboard software and performs a self-test. It will remain ON
if there is a connection at the RS-232 port, otherwise this LED indicator is OFF
Power Failure
As a precaution in the event of a power failure, unplug the switch. When the power supply is restored, plug the switch back in.
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D-Link DES-3350SR Standalone Layer 3 Switch
Section 3
Identifying External Components
Front Panel
Rear Panel
Side Panels
Gigabit Combo Ports
LED Indicators
This chapter describes the front panel, rear panel, side panels, and optional plug-in module, and LED indicators of the DES3350SR.
Front Panel
The front panel of the Switch consists of LED indicators, an RS -232 communication port, 48 (10/100 Mbps) Ethernet/Fast Ethernet
ports , and a pair of Gigabit Ethernet Combo ports for 1000BASE-T (plug-in module provided) and Mini GBIC connections
(optional plug-in module).
Figure 3 - 1. Front panel view of the Switch
Comprehensive LED indicators display the status of the switch and the network (see the LED Indicators section below).
• An RS-232 DCE console port for setting up and managing the switch via a connection to a console terminal or PC using a
terminal emulation program.
• Forty-eight high-performance NWay Ethernet ports, all of which operate at 10/100 Mbps for connections to end stations,
servers and hubs. All ports can auto-negotiate between 10Mbps or 100Mbps and full or half duplex.
• Two Gigabit Ethernet Combo ports for making 1000BASE-T and Mini GBIC connections.
Rear Panel
The rear panel of the switch consists of two fans and an AC power connector.
Figure 3 - 2. Rear panel view of the Switch
The system fans are used to dissipate heat. The sides of the system also provide heat vents to serve the same purpose. Do not block
these openings, and leave at least 6 inches of space at the rear and sides of the switch for proper ventilation. Be reminded that
without proper heat dissipation and air circulation, system components might overheat, which could lead to system failure. The AC
power connector is a standard three-pronged connector that supports the power cord. Plug-in the female connector of the provided
power cord into this socket, and the male side of the cord into a power outlet. Supported input voltages range from 100 ~ 240 VAC
at 50 ~ 60 Hz.
Side Panels
Each side panel contains heat vents to help to dissipate heat.
Figure 3 - 3. Side panel views of the Switch
The system fans are used to dissipate heat. The sides of the system also provide heat vents to serve the same purpose. Do not block
these openings, and leave at least 6 inches of space at the rear and sides of the switch for proper ventilation. Be reminded that
without proper heat dissipation and air circulation, system components might overheat, which could lead to system failure.
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D-Link DES-3350SR Standalone Layer 3 Switch
Gigabit Combo Ports
In addition to the 48 10/100 Mbps ports, the Switch features two Gigabit Ethernet Combo ports. These two ports are 1000BASE-T
copper ports (provided) and Mini -GBIC ports (optional). See the diagram below to view the two Mini-GBIC port modules being
plugged into the Switch. Please note that although these two front panel modules can be used simultaneously, the ports must be
different. The GBIC port will always have the highest priority.
Figure 3 - 4. Mini-GBIC modules plug-in to the Switch
LED Indicators
The LED indicators of the Switch include Power, Console, and Link/Act. The following shows the LED indicators for the Switch
along with an explanation of each indicator.
Figure 3 - 5. The LED Indicators
Power – This indicator on the front panel should be lit during the Power-On Self Test (POST). It will light green
approximately 2 seconds after the switch is powered on to indicate the ready state of the device.
Console – This indicator is lit green when the switch is being managed via local console management through the RS-232
console port.
Link/Act – These indicators are located to the left and right of each port. They are lit when there is a secure connection (or
link) to a device at any of the ports. The LEDs blink whenever there is reception or transmission (i.e. Activity--Act) of data
occurring at a port.
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D-Link DES-3350SR Standalone Layer 3 Switch
Section 4
Connecting the Switch
Switch to End Node
Switch to Hub or Switch
10BASE-T Device
100BASE-TX Device
This chapter describes how to connect the DES-3350SR to your Ethernet/Fast Ethernet/Gigabit Ethernet network. The Switch’s
auto-detection feature allows all 48 10/100 ports to support both MDI-II and MDI-X connections.
Switch to End Node
End nodes include PCs outfitted with a 10, 100, or 10/100 Mbps RJ-45 Ethernet/Fast Ethernet Network Interface Card (NIC) and
most routers.
An end node can be connected to the Switch via a two-pair Category 3, 4, or 5 UTP/STP cable. The end node should be connected
to any of the ports (1x - 48x) on the switch.
Figure 4 - 1. Switch connected to an End Node
The Link/Act LEDs in the top row for each UTP port light green when the link is valid. A blinking LED in the top row indicates
packet activity on that port.
Switch to Hub or Switch
These connections can be accomplished in a number of ways using a normal cable.
• A 10BASE -T hub or switch can be connected to the Switch via a two-pair Category 3, 4 or 5 UTP/STP cable.
• A 100BASE -TX hub or switch can be connected to the Switch via a two-pair Category 5 UTP/STP cable.
Figure 4 - 2. Switch connected to a port on a hub or switch using a straight or crossover cable
10BASE-T Device
For a 10BASE-T device, the Switch’s LED indicators should display the following:
• Link/Act indicator is ON.
100BASE-TX Device
For a 100BASE-TX device, the Switch’s LED indicators should display the following:
• Link/Act is ON.
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D-Link DES-3350SR Standalone Layer 3 Switch
Introduction to Switch Management
Management Options
Web-based Management Interface
SNMP-Based Management
Managing User Accounts
Command Line Console Interface through the Serial Port
Connecting the Console Port (RS-232 DCE)
First Time Connecting to The Switch
Password Protection
SNMP Settings
IP Address Assignment
Connecting Devices to the Switch
Management Options
Section 5
This system may be managed out-of-band through the console port on the front panel or in-band using Telnet. The user may also
choose the web-based management, accessible through a web browser.
Web-based Management Interface
After you have successfully installed the Switch, you can configure the Switch, monitor the LED panel, and display statistics
graphically using a web browser, such as Netscape Navigator (version 6.2 and higher) or Microsoft® Internet Explorer (version
5.0).
SNMP-Based Management
You can manage the Switch with an SNMP-compatible console program. The Switch supports SNMP version 1.0, version 2.0 and
version 3.0. The SNMP agent decodes the incoming SNMP messages and responds to requests with MIB objects stored in the
database. The SNMP agent updates the MIB objects to generate statistics and counters.
Command Line Console Interface Through the Serial Port
You can also connect a computer or terminal to the serial console port to access the Switch. The command-line-driven interface
provides complete access to all Switch management features.
Connecting the Console Port (RS-232 DCE)
The Switch provides an RS-232 serial port that enables a connection to a computer or terminal for monitoring and configuring the
Switch. This port is a female DB-9 connector, implemented as a data terminal equipment (DTE) connection.
To use the console port, you need the following equipment:
A terminal or a computer with both a serial port and the ability to emulate a terminal.
A null modem or crossover RS-232 cable with a female DB-9 connector for the console port on the Switch.
To connect a terminal to the console port:
1. Connect the female connector of the RS-232 cable directly to the console port on the Switch, and tighten the captive
retaining screws.
2. Connect the other end of the cable to a terminal or to the serial connector of a computer running terminal emulation
software. Set the terminal emulation software as follows:
3. Select the appropriate serial port (COM port 1 or COM port 2).
4. Set the data rate to 9600 baud.
5. Set the data format to 8 data bits, 1 stop bit, and no parity.
6. Set flow control to none.
7. Under Properties , select VT100 for Emulation mode.
8. Select Terminal keys for Function, Arrow, and Ctrl keys. Ensure that you select Terminal keys (not Windows keys).
NOTE: When you use HyperTerminal with the Microsoft® Windows® 2000
operating system, ensure that you have Windows 2000 Service Pack 2 or
later installed. Windows 2000 Service Pack 2 allows you to use arrow keys
in HyperTerminal's VT100 emulation. See www.microsoft.com for
information on Windows 2000 service packs.
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D-Link DES-3350SR Standalone Layer 3 Switch
9. After you have correctly set up the terminal, plug the power cable into the power receptacle on the back of the Switch.
The boot sequence appears in the terminal.
10. After the boot sequence completes, the console login screen displays.
11. Usernames and Passwords are not required on the initial screen after the first connection. Any additional user names and
passwords must first be created by the administrator. If you have previously set up user accounts, log in and continue to
configure the Switch.
12. Enter the commands to complete your desired tasks. Many commands require administrator -level access privileges. Read
the next section for more information on setting up user accounts. See the DES-3350SR Command Line Interface
Reference Manual on the documentation CD for a list of all commands and additional information on using the CLI.
13. When you have completed your tasks, exit the session with the logout command or close the emu lator program.
Make sure the terminal or PC you are using to make this connecti on is configured to match these settings.
If you are having problems making this connection on a PC, make sure the emulation is set to VT-100. You will be able to set the
emulation by clicking on the File menu in you HyperTerminal window, clicking on Properties in the drop-down menu, and then
clicking the Settings tab. This is where you will find the Emulation options. If you still do not see anything, try rebooting the
Switch by disconnecting its power supply.
Once connected to the console, the screen below will appear on your console screen. This is where the user will enter commands to
perform all the available management functions. The Switch will prompt the user to enter a user name and a password. Upon the
initial connection, the user name and password are not required. These can be changed or deleted later.
Figure 5 - 1. Initial screen after first connection
First Time Connecting to The Switch
The Switch supports user -based security that can allow you to prevent unauthorized users from accessing the Switch or changing
its settings. This section tells how to log onto the Switch.
NOTE: The passwords used to access the Switch are case-sensitive; therefore,
"S" is not the same as "s."
When you first connect to the Switch, you will be presented with the first login screen (shown below).
NOTE: Press Ctrl+R to refresh the screen. This command can be used at any time
to force the console program in the Switch to refresh the console screen.
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D-Link DES-3350SR Standalone Layer 3 Switch
Figure 5 - 2. Initial screen, first time connecting to the Switch
Usernames and Passwords are not required on the initial screen after the first connection. Any additional user names and passwords
must first be created by the administrator. You will be given access to the command prompt local> shown below:
Figure 5 - 3. Command Prompt
NOTE: The first user automatically gets Administrator level privileges. It is
recommended to create at least one Admin-level user account for the
Switch.
Password Protection
The DES-3350SR does not have a default user name and password. One of the first tasks when set tings up the Switch is to create
user accounts. If you log in using a predefined administrator -level user name, you have privileged access to the Switch's
management software.
After your initial login, define new passwords for both default user names to prevent unauthorized access to the Switch, and record
the passwords for future reference.
To create an administrator -level account for the Switch, do the following:
• At the CLI login prompt, enter create account admin followed by the <user name> and press the Enter key.
• You will be asked to provide a password. Type the <password> used for the administrator account being created and press
the Enter key.
• You will be prompted to enter the same password again to verify it. Type the same password and press the Enter key.
Successful creation of the new administrator account will be verified by a Success message.
NOTE: Passwords are case sensitive. User names and passwords can be
up to 15 characters in length.
The sample below illustrates a successful creation of a new administrator -level account with the user name "newmanager".
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D-Link DES-3350SR Standalone Layer 3 Switch
Figure 5 - 4.Creation of a new Admin level account
NOTICE: CLI configuration commands only modify the running
configuration file and are not saved when the Switch is rebooted. To save
all your configuration changes in nonvolatile storage, you must use the
save command to copy the running configuration file to the startup
configuration.
SNMP Settings
Simple Network Management Protocol (SNMP) is an OSI Layer 7 (Application Layer) designed specifically for managing and
monitoring network devices. SNMP enables network management stations to read and modify the settings of gateways, routers,
switches, and other network devices. Use SNMP to configure system features for proper operation, monitor performance and detect
potential problems in the Switch, switch group or network.
Managed devices that support SNMP include software (referred to as an agent), which runs locally on the device. A defined set of
variables (managed objects) is maintained by the SNMP agent and used to manage the device. These objects are defined in a
Management Information Base (MIB), which provides a standard presentation of the information controlled by the on-board
SNMP agent. SNMP defines both the format of the MIB specifications and the protocol used to access this information over the
network.
The DES-3350SR supports SNMP versions 1, 2c, and 3. You can specify which version of SNMP you want to use to monitor and
control the Switch. The three versions of SNMP vary in the level of security provided between the management station and the
network device.
In SNMP v.1 and v.2, user authentication is accomplished using 'community strings', which function like passwords. The remote
user SNMP application and the Switch SNMP must use the same community string. SNMP packets from any station that has not
been authenticated are ignored (dropped).
The default community strings for the Switch used for SNMP v.1 and v.2 management access are:
• public - Allows authorized management stations to retrieve MIB objects.
• private - Allows authorized management stations to retrieve and modify MIB objects.
SNMP v.3 uses a more sophisticated authentication process that is separated into two parts. The first part is to maintain a list of
users and their attributes that are allowed to act as SNMP managers. The second part describes what each user on that list can do as
an SNMP manager.
The Switch allows groups of users to be listed and configured with a shared set of privileges. The SNMP version may also be set
for a listed group of SNMP managers. Thus, you may create a group of SNMP managers that are allowed to view read-only
information or receive traps using SNMP v.1 while assigning a higher level of security to another group, granting read/write privi leges using SNMP v.3.
Using SNMP v.3 individual users or groups of SNMP managers can be allowed to perform or be restricted from performing
specific SNMP management functions. The functions allowed or restricted are defined using the Object Identifier (OID) associated
with a specific MIB. An additional layer of security is available for SNMP v.3 in that SNMP messages may be encrypted. To read
more about how to configure SNMP v.3 settings for the Switch read the section entitled Management.
Traps
Traps are messages that alert network personnel of events that occur on the Switch. The events can be as serious as a reboot
(someone accidentally turned OFF the Switch), or less serious like a port status change. The Switch generates traps and sends them
to the trap recipient (or network manager). Typical traps include trap messages for Authentication Failure, Topology Change and
Broadcast\Multicast Storm.
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D-Link DES-3350SR Standalone Layer 3 Switch
MIBs
Management and counter information are stored by the Switch in the Management Information Base (MIB). The Switch uses the
standard MIB-II Management Information Base module. Con sequently, values for MIB objects can be retrieved from any SNMPbased network management software. In addition to the standard MIB-II, the Switch also supports its own proprietary enter prise
MIB as an extended Management Information Base. The proprietary MIB may also be retrieved by specifying the MIB Object
Identifier. MIB values can be either read-only or read-write.
IP Address Assignment
Each Switch must be assigned its own IP Address, which is used for communication with an SNMP network manager or other
TCP/IP application (for example BOOTP, TFTP). The Switch's default IP address is 10.90.90.90. You can change the default
Switch IP address to meet the spec ification of your networking address scheme.
The Switch is also assigned a unique MAC address by the factory. This MAC address cannot be changed, and can be found by
entering the command "show switch" into the command line interface, as shown below.
Figure 5 - 5. Show switch command
The Switch's MAC address can also be found from the Web management program on the Switch Information (Basic Settings)
window on the Configuration menu.
The IP address for the Switch must be set before it can be managed with the Web-based manager. The Switch IP address can be
automatically set using BOOTP or DHCP protocols, in which case the actual address assigned to the Switch must be known.
The IP address may be set using the Command Line Interface (CLI) over the console serial port as follows:
Starting at the command line prompt, enter the commands config ipif System ipaddress xxx.xxx.xxx.xxx/yyy.yyy.yyy.yyy. Where
the x's represent the IP address to be assigned to the IP interface named System and the y's represent the corresponding subnet
mask.
Alternatively, you can enter config ipif Syst em ipaddress xxx.xxx.xxx.xxx/z. Where the x's represent the IP address to be
assigned to the IP interface named System and the z represents the corresponding number of subnets in CIDR notation.
The IP interface named System on the Switch can be assigned an IP address and subnet mask that can then be used to connect a
management station to the Switch's Telnet or Web-based management agent.
Figure 5 - 6. Assigning the Switch an IP Address
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D-Link DES-3350SR Standalone Layer 3 Switch
In the above example, the Switch was assigned an IP address of 10.58.44.221 with a subnet mask of 255.0.0.0. The system
message Success indicates that the command was executed successfully. The Switch can now be configured and managed via
Telnet and the CLI or via the Web-based management.
Connecting Devices to the Switch
After you assign IP addresses to the Switch, you can connect devices to the Switch.
To connect a device to an SFP transceiver port:
• Use your cabling requirements to select an appropriate SFP transceiver type.
• Insert the SFP transceiver (sold separately) into the SFP transceiver slot.
• Use the appropriate network cabling to connect a device to the connectors on the SFP transceiver.
NOTICE: When the SFP transceiver acquires a link, the associated
integrated 10/100/1000BASE-T port is disabled.
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D-Link DES-3350SR Standalone Layer 3 Switch
Section 6
Web-based Switch Management
Introduction
Login to Web Manager
User Accounts Management
Admin and User Privileges
Save Changes
Areas of the User Interface
Web Pages
Introduction
The DES-3350SR offers an embedded Web-based (HTML) interface allowing users to manage the switch from anywhere on the
network through a standard browser such as Netscape Navigator/Communicator or Microsoft Internet Explorer. The Web browser
acts as a universal access tool and can communicate directly with the Switch using the HTTP protocol.
The Web-based management module and the Console program (and Telnet) are different ways to access the same internal
switching software and configure it. Thus, all settings encountered in web-based management are the same as those found in the
console program.
Note: This Web-based Management Module does not accept Chinese language input (or other languages requiring 2 bytes per
character).
Login to Web Manager
The first step in getting started in using Web-based management for your Switch is to secure a browser. A Web browser is a
program that allows a person to read hypertext, for example, Opera, Netscape Navigator, or Microsoft Internet Explorer. Follow the
installation instructions for your browser.
The second step is to give the switch an IP address. This can be done manually through the console or automatically using
BOOTP/DHCP.
To begin managing your Switch simply run the browser you have installed on your computer and point it to the IP address you
have defined for the device. The URL in the address bar should read something like: http://123.123.123.123, where the numbers
123 represent the IP address of the switch.
Note: The Factory default IP address for the switch is 10.90.90.90.
In the page that opens, click on the Login to make a setup button:
Figure 6 - 1. Login button
This opens the management module’s main page.
The switch management features available in the Web-based manager are explained below.
User Accounts Management
From the Management menu, click User Accounts and then the User Account Management window appears.
Figure 6 - 2. User Account Management window
Click Add to add a user.
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D-Link DES-3350SR Standalone Layer 3 Switch
Figure 6 - 3. User Account Modify Table window
1. Enter the new user name, assign an initial password, and then confirm the new password. Determine whether the new user
should have Admin or User privileges.
2. Click Apply to make the user addition effective.
3. A listing of all user accounts and access levels is shown in the User Account Management window. This list is updated
when Apply is executed. Click Show All User Account Entries to access this window.
4. Please remember that Apply makes changes to the switch configuration for the current session only. All changes
(including User additions or updates) must be entered into non-volatile ram using the Save Changes command on the
Main Menu - if you want these changes to be permanent.
Admin and User Privileges
There are two levels of user privileges: Admin and User. Some menu selections available to users with Admin privileges may not
be available to those with User privileges.
The following table summarizes the Admin and User privileges:
Switch Configuration Privilege
Management Admin User
Configuration Yes Read Only
Network Monitoring Yes Read Only
Community Strings and Trap Stations Yes Read Only
Update Firmware and Configuration Files Yes Read Only
System Utilities Yes Ping Only
Factory Reset Yes No
Reboot Switch Yes No
User Account Management
Add/Update/Delete User Accounts Yes No
View User Accounts Yes No
Table 6-1. Admin and User Privileges
After establishing a User Account with Admin-level privileges, go to the Maintenance menu and click Save Changes . Next click
Save Configuration. The switch will now save any changes to its non-volatile ram and reboot. You can logon again and are now
ready to continue configuring the Switch.
Save Changes
The DES-3350SR has two levels of memory; normal RAM and non-volatile or NV-RAM. Configuration changes are made
effective by clicking the Apply button. When this is done, the settings will be immediately applied to the switching software in
RAM, and will immediately take effect.
Some settings, though, require you to restart the switch before they will take effect. Restarting the switch erases all settings in
RAM and reloads the stored settings from the NV -RAM. Thus, it is necessary to save all setting changes to NV-RAM before
rebooting the switch.
To retain any configuration changes permanently, click Save Changes from the Maintenance menu. The following window
will appear:
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D-Link DES-3350SR Standalone Layer 3 Switch
Area 2
Area 1
Area
3
Figure 6 - 4. Save Configuration window
Click the Save Configuration button to save the current switch configuration in NV -RAM. The following dialog box will confirm
that the configuration has been saved:
Figure 6 - 5. Save Configuration Confirmation dialog box
Click the OK button to continue.
Once the switch configuration settings have been saved to NV-RAM, they become the default settings for the switch. These
settings will be used every time the switch is rebooted.
Areas of the User Interface
The user interface provides access to various switch configuration and management screens, allows you to view performance
statistics, and permits you to graphically monitor the system status. The figure below shows the user interface. The user interface is
divided into 3 distinct areas as described in the table.
Figure 6 - 6. Main Web-Manager window
Area Function
1
Presents a graphical near real-time image
of the front panel of the switch. This area
displays the switch’s ports and expansion
modules, showing port activity, or duplex
mode, depending on the specified mode.
Various areas of the graphic can be
selected for performing management
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D-Link DES-3350SR Standalone Layer 3 Switch
functions, including the ports, expansion
modules, management module, or the
case.
2
Allows the selection of commands.
3
NOTICE: Any changes made to the Switch configuration during the
current session must be saved in the Save Changes web menu
(explained below) or use the command line interface (CLI) command
save.
Presents switch information based on your
selection and the entry of configuration
data.
Web Pages
When you connect to the management mode of the Switch with a web browser, a login window is displayed. Enter a user name
and password to access the Switch's management mode.
Below is a list and description of the main folders available in the web interface:
Configuration – Contains windows concerning configurations for IP Address, Switch Information, Advanced Settings, Port
Description, Port Configuration, Port Mirroring, IGMP, Spanning Tree, Forwarding Filtering, VLANs, Port Bandwidth, SNTP
Settings, Port Security, QoS, LACP, Access Profile Table, IP -MAC Binding, PAE Access Entity, and Layer 3 IP Networking.
Management – Contains windows concerning configurations for Security IP, User Accounts, and SNMP V3.
Layer 3 IP networking - Contains windows concerning configurations for IP Interface Settings, Layer 3 Global Settings, MD5
Key Table Settings, Route Redistribution Settings, Static/Default Route Settings, Static ARP Settings, RIP, OSPF, DHCP/Bootp
Relay, DNS Relay, and IP Multicast Routing Protocol
Monitoring – Contains windows concerning monitoring the Switch pertaining to CPU Utilization, Port Utilization, Packets, Errors
Size, MAC Address, IGMP Snooping Group, IGMP Snooping Forwarding, VLAN Status, Router Port, Port Access Control and
Layer 3 Feature.
Maintenance – Contains windows concerning configurations and information about Switch maintenance, including TFTP Services,
Switch History, Ping Test, Save Changes, Reboot Services, and Logout.
.
NOTE: Be sure to configure the user name and password in the User
Accounts menu before con necting the Switch to the greater network.
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D-Link DES-3350SR Standalone Layer 3 Switch
Section 7
Configuration
IP Address
Switch Information
Advanced Settings
Port Description
Port Configuration
Port Mirroring
IGMP
Spanning Tree
Forwarding Filtering
VLANs
Port Bandwidth
SNTP Settings
Port Security
QoS
LACP
Access Profile Table
IP-MAC Binding
PAE Access Entity
This section, arranged by topic, describes how to perform common configuration tasks on the DES-3350SR switch using the Webbased Manager.
IP Address
The Switch needs to have an IP address assigned to it so that an In-Band network management system (for example, the Web
Manager or Telnet) client can find it on the network. The IP Address Settings window allows you to change the settings for the
Ethernet interface used for in-band communication.
To set the switch’s IP address:
Click IP Address on the Configuration menu to open the following window:
Figure 7 - 1. IP Address Settings window
Note: The switch’s factory default IP address is 10.90.90.90 with a subnet mask of 255.0.0. 0 and a default gateway of 0.0.0.0.
To manually assign the switch’s IP address, subnet mask, and default gateway address:
Select Manual from the Get IP From drop-down menu. Enter the appropriate IP address and subnet mask. If you want to access
the switch from a different subnet from the one it is installed on, enter the IP address of the gateway. If you will manage the switch
from the subnet on which it is installed, you can leave the default address in this field. If no VLANs have been previously
configured on the switch, you can use the default VLAN − named “default.” The default VLAN contains all of the switch ports as
members. If VLANs have been previously configured on the switch, you will need to enter the VLAN name of the VLAN that
contains the port that the management station will access the switch on.
To use the BOOTP or DHCP protocols to assign the switch an IP address, subnet mask, and default gateway address:
Use the Get IP From pull-down menu to choose from Manual, BOOTP, or DHCP. This selects how the switch will be assigned an
IP address on the next reboot (or startup).
The following fields can be set:
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D-Link DES-3350SR Standalone Layer 3 Switch
Parameter Description
BOOTP The switch will send out a BOOTP broadcast
request when it is powered up. The BOOTP
protocol allows IP addresses, network masks,
and default gateways to be assigned by a
central BOOTP server. If this option is set, the
Switch will first look for a BOOTP server to
provide it with this information before using the
default or previously entered settings.
DHCP The switch will send out a DHCP broadcast
request when it is powered up. The DHCP
protocol allows IP addresses, network masks,
and default gateways to be assigned by a DHCP
server. If this option is set, the switch will first
look for a DHCP server to provide it with this
information before using the default or
previously entered settings.
Manual Allows the entry of an IP address, Subnet
Mask, and a Default Gateway for the switch.
These fields should be of the form
xxx.xxx.xxx.xxx, where each xxx is a number
(represented in decimal form) between 0 and
255. This address should be a unique address
on the network assigned for use by the network
administrator. The fields which require entries
under this option are as follows:
IP Address Determines the IP address used by the switch
for receiving SNMP and Telnet
communications. These fields should be of the
form xxx.xxx.xxx .xxx, where each xxx is a
number (represented in decimal) between 0 and
255. Thi s address should be a unique address
on a network assigned to you by the central
Internet authorities.
Subnet Mask A Bitmask that determines the extent of the
subnet that the Switch is on. Should be of the
form xxx.xxx.xxx .xxx, where each xxx is a
number (represented in decimal) between 0 and
255. The value should be 255.0.0.0 for a Class
A network, 255.255.0.0 for a Class B network,
and 255.255.255.0 for a Class C network, but
custom subnet masks are allowed.
Default Gateway IP address that determines where packets with a
destination address outside the current subnet
should be sent. This is usually the address of a
router or a host acting as an IP gateway. If your
network is not part of an intranet, or you do not
want the Switch to be accessible outside your
local network, you can leave this field
unchanged.
VLAN Name This allows the entry of a VLAN name from
which a management station (a computer) will
be allowed to manage the switch using TCP/IP
(in-band, or over the network). Management
stations that are on VLANs other than the one
entered in the VLAN Name field will not be
able to manage the switch in-band unless their
IP addresses are entered in the Management
Station IP Addresses field. The default VLAN
is named default and contains all of the switch’s
ports. There are no entries in the Management
Station IP Addresses table, by default − so any
management station can access the switch.
Admin. State This setting allows the IP interface named
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D-Link DES-3350SR Standalone Layer 3 Switch
“System” to be enabled or disabled.
Switch Information
Click the Switch Information link in the Configuration menu.
Figure 7 - 2. Switch Information (Basic Settings) window
This window shows which (if any) external modules are installed, and the switch’s MAC Address (assigned by the factory and
unchangeable). In addition, the Boot PROM Version and Firmware Version numbers are shown. This information is helpful to
keep track of PROM and firmware updates and to obtain the switch’s MAC address for entry into another network device’s address
table – if necessary.
You can also enter the name of the System, its location, and the name and telephone number of the System Administrator. It is
recommended that the person responsible for the maintenance of the network system that this switch is installed on be listed here.
Advanced Settings
Click Advanced Settings on the Configuration menu:
Figure 7 - 3. Switch Information (Advanced Settings) window
The following fields can be set:
Parameter Description
Serial-port auto logout
time
The Auto Logout field may be set to Never, 2
minutes, 5 minutes, 10 minutes, and 15
minutes, depending on the time the user wishes
the Switch to be idle before automatically
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D-Link DES-3350SR Standalone Layer 3 Switch
logging out. The default for this setting is 10
minutes.
MAC Address Aging
Time <300>
IGMP Snooping
<Disabled>
GVRP Status
<Disabled>
Telnet Status
<Disabled>
Web Status <Disabled> To enable the Web status, toggle Disabled to
Link Aggregation
Algorithm <Mac
Source>
The MAC Address Aging Time specifies the
length of time a learned MAC Address will
remain in the forwarding table without being
accessed (that is, how long a learned MAC
Address is allowed to remain idle). The Aging
Time can be set to any value between 10 and
1,000,000 seconds.
IGMP Snooping allows the switch to read the
Multicast Group IP address and the
corresponding MAC address from IGMP
packets that pass through the switch. It can be
enabled globally by toggling Disabled to
Enabled.
To enable GVRP on the switch globally, toggle
Disabled to Enabled.
The Switch can be accessed using Telnet.
Toggle Disabled to Enabled.
Enabled.
The Link Aggregation Algorithm can be set to
one of the following: IP Src & Dest, IP
Destination , IP Source, Mac Src & Dest, Mac
Destination , or Mac Source.
RMON Status
<Disabled>
802.1x Status To enable 802.1x port control access on a
To enable RMON capability, toggle Disabled
to Enabled.
global basis, toggle Disabled to Enabled.
Port Description
The Switch supports a port description feature where the user may name various ports on the Switch. To assign names to various
ports, click the Port Description on the Configuration menu:
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D-Link DES-3350SR Standalone Layer 3 Switch
Figure 7 - 4. Port Description Settings window
Use the From and To pull down menu to choose a port or range of ports to describe and Unit to choose the Switch in the switch
stack, and then enter a description of the port(s). Click Apply to set the descriptions in the Port Description Settings Table.
Port Configuration
Click the Port Configuration link in the Configuration menu:
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D-Link DES-3350SR Standalone Layer 3 Switch
Figure 7 - 5. Port Configuration window
The From and To drop-down dialog boxes allow different ports to be selected for configuration.
Use the State pull -down menu to either enable or disable the selected port.
Use the Speed/Duplex pull-down menu to select the speed and duplex/half-duplex state of the port. The Auto setting allows the
port to automatically determine the fastest settings the port on the device connected to the DES-3350SR can handle, and then use
those settings. The other options for ports 1-48 are 100M/Full, 100M/Half, 10M/Full, and 10M/Half. For Combo ports 49 and 50, if
the optional Mini -GBIC plug-in module is used, the options are Auto and 1000/Full. Otherwise, the two 1000BASE-T Copper
ports offer the same five choices for ports 1-48, plus a 1000/Full option.
Please note that although the two front panel modules can be used simultaneously, the ports must be different. For example, if port
50x is used on the Mini GBIC module, port 50x is not available on the 1000BASE-T module. In addition, the fiber port will always
be the highest priority.
The following fields can be set:
Parameter Description
From and To Enter the desired range of ports to be
configured in these fields.
State <Enabled> Toggle the State field to either enable or disable
a given port.
Speed/Duplex <Auto> Toggle the Speed/Duplex field to either select
the speed and duplex/half -duplex state of the
port. Auto – auto-negotiation between 10 and
100 Mbps devices, full- or half-duplex. The
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D-Link DES-3350SR Standalone Layer 3 Switch
Port Mirroring
Click Port Mirroring on the Configuration menu:
Auto setting allows the port to automatically
determine the fastest settings the device the port
is connected to can handle, and then to use
those settings. The other options are 100M/Full,
100M/Half, 10M/Full, and 10M/Half. There is
no automatic adjustment of port settings with
any option other than Auto.
Figure 7 - 6. Setup Port Mirroring window
The target port is where information will be duplicated and sent for capture and network analysis. A network analyzer would be
attached to this port to captur e packets duplicated from the source port.
It should be noted that a faster port (a 1000 Mbps Gigabit Ethernet port, for example) should not be mirrored to a slower port (one
of the 48 100 Mbps Fast Ethernet ports), because many packets will be dropped.
The following fields can be set:
Parameter Description
Source Port Allows multiple ports to be mirrored. These
ports are the sources of the packets to be
duplicated and forwarded to the Target port.
None Selecting this option prevents any pack ets
from either being received or transmitted.
Ingress Selecting this option mirrors only received
packets.
Egress Selecting this option mirrors only transmitted
packets.
Both Selecting this option mirrors both received
and transmitted packets.
Target Port This port is where information will be
duplicated and sent for capture and network
analysis.
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D-Link DES-3350SR Standalone Layer 3 Switch
Status Toggle between Enabled and Disabled.
IGMP
IGMP Snooping
From the Configuration menu, select the IGMP folder, and then click IGMP Snooping to open the following window:
Figure 7 - 7. Current IGMP Snooping Group Entries window
To edit an IGMP Snooping entry on the switch, click the Modify button next to the entry on the Current IGMP Snooping Group
Entries window. The IGMP Snooping Settings window, shown below, will appear.
The following fields can be set:
Parameter Description
VLAN ID
VLAN Name
Query Interval (1 -
65535)
Max Response
Time(1-125)
Robustness Value
Figure 7 - 8. IGMP Snooping Settings window
Allows the entry of the VLAN ID for which
IGMP Snooping is to be configured.
Allows the entry of the name of the VLAN
for which IGMP Snooping is to be
configured.
Allows the entry of a value between 1 and
65535 seconds, with a default of 125
seconds. This specifies the length of time
between sending IGMP queries.
Sets the maximum amount of time allowed
before sending an IGMP response report.
A value between 1 and 25 seconds can be
entered, with a default of 10 seconds.
A tuning variable to allow for VLANs that
are expected to lose a large number of
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D-Link DES-3350SR Standalone Layer 3 Switch
packets. A value between 2 and 255 can
be entered, with larger values being
specified for VLANs that are expected to
lose larger numbers of packets.
Last Member Query
Interval
Host Timeout (1 -
16711450)
Router Timeout (1 -
16711450)
Leave Timer (1 -
16711450)
Querier State
Specifies the maximum amount of time
between group-specific query messages,
including those sent in response to leave
group messages. The default is 1 second.
Specifies the maximum amount of time a
host can be a member of a multicast group
without the switch receiving a host
membership report. The default is 260
seconds.
Specifies the maximum amount of time a
route will remain in the switch’s forwarding
table without receiving a membership
report. The default is 260 seconds.
Specifies the maximum amount of time
between the switch receiving a leave group
message from a host, and the switch
issuing a group membership query. If the
switch does not receive a response from
the group membership query before the
Leave Timer expires, the forwarding table
entry for the multicast address is deleted
from the switch’s forwarding table. The
default is 2 seconds.
This field can be switched using the pulldown menu between Disabled and
Enabled.
State
This field can be switched using the pulldown menu between Disabled and
Enabled. This is used to enable or disable
IGMP Snooping for the specified VLAN.
Static Router Ports Entry
A static router port is a port that has a multicast router attached to it. Generally, this router would have a connection to a WAN or
to the Internet. Establishing a router port will allow multicast packets coming from the router to be propagated through the network,
as well as allowing multicast messages (IGMP) coming from the network to be propagated to the router.
A router port has the following behavior:
• All IGMP Report packets will be forwarded to the router port.
• IGMP queries (from the router port) will be flooded to all ports.
• All UDP multicast packets will be forwarded to the router port. Because routers do not send IGMP reports or implement
IGMP snooping, a multicast router connected to the router port of the Layer 2 switch would not be able to receive UDP
data streams unless the UDP multicast packets were all forwarded to the router port.
Click Static Router Ports Entry under the IGMP folder on the Configuration menu:
Figure 7 - 9. Current Static Router Ports Entries window
To add a static router port configuration, click the pointer icon:
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D-Link DES-3350SR Standalone Layer 3 Switch
Figure 7 - 10. Static Router Ports Settings window
The following fields are displayed:
Parameter Description
VID Displays the name of the VLAN ID the static
router port belongs to.
VLAN Na me Displays the name of the VLAN the static
router port belongs to.
Member Ports Each port can be set individually as a router
port by clicking the port’s click-box entry.
Spanning Tree
The Spanning Tree Protocol (STP) operates on two levels: on the switch level, the settings are globally implemented. On the port
level, the settings are implemented on a user -defined Group of ports basis.
802.1w Rapid Spanning Tree
The Switch implements two versions of the Spanning Tree Protocol, the Rapid Spanning Tree Protocol (RSTP) as defined by the
IEEE 802.1w specification and a version compatible with the IEEE 802.1d STP. RSTP can operate with legacy equipment
implementing IEEE 802.1d, however the advantages of using RSTP will be lost.
The IEEE 802.1w Rapid Spanning Tree Protocol (RSTP) evolved from the 802.1d STP standard. RSTP was developed in order to
overcome some limitations of STP that impede the function of some recent switching innovations, in particular, certain Layer 3
function that are increasingly handled by Ethernet switches. The basic function and much of the terminology is the same as STP.
Most of the settings configured for STP are also used for RSTP. This section introduces some new Spanning Tree concepts and
illustrates the main differences between the two protocols.
Port Transition States
An essential difference between the two protocols is in the way ports transition to a forwarding state and the in the way this
transition relates to the role of the port (forwarding or not forwarding) in the topology. RSTP combines the transition states
disabled, blocking, and listening used in 802.1d and creates a single state: discarding. In either case, ports do not forward packets;
in the STP port transition states disabled, blocki ng, or listening, or in the RSTP port state discarding, there is no functional
difference, the port is not active in the network topology. Table 5 -1 below compares how the two protocols differ regarding the
port state transition.
802.1d STP 802.1w RSTP Forwarding Learning
Disabled Discarding No No
Blocking Discarding No No
Listening Discarding No No
Learning Learning No Yes
Forwarding Forwarding Yes Yes
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D-Link DES-3350SR Standalone Layer 3 Switch
RSTP is capable of more rapid transition to a forwarding state – it no longer relies on timer configurations – RSTP-compliant
bridges are sensitive to feedback from other RSTP-compliant bridge links. Ports do not need to wait for the topology to stabilize
before transitioning to a forwarding state. In order to allow this rapid transition, the protocol introduces two new variables: the
edge port and the point-to-point (P2P) port.
Edge Port
The edge port is a configurable designation used for a port that is directly connected to a segment where a loop cannot be created.
An example would be a port connected directly to a single workstation. Ports that are designated as edge ports, transition to a
forwarding state immediately without going through the listening and learning states. An edge port loses its status if it receives a
BPDU packet, immediately becoming a normal spanning tree port.
P2P Port
A P2P port is also capable of rapid transition. P2P ports may be used to connect to other bridges. Under RSTP, all ports operating
in full-duplex mode are considered to be P2P ports, unless manually overridden thr ough configuration.
802.1d/802.1w Compatibility
RSTP can interoperate with legacy equipment and is capable of automatically adjusting BPDU packets to 802.1d format when
necessary. However, any segment using 802.1 STP will not benefit from the rapid transition and rapid topology change detection
of RSTP. The protocol also provides for a variable used for migration in the event that legacy equipment on a segment is updated
to use RSTP.
STP Switch Settings
In the Configuration folder open the Spanning Tree folder, then click on the STP Switch Settings link.
Figure 7 - 11. Switch Spanning Tree Settings window
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D-Link DES-3350SR Standalone Layer 3 Switch
Note: The factory default setting should cover the majority of installations. It is advisable to keep the default settings as set at the
factory unless it is absolutely necessary to change them.
The following fields can be set:
Parameter Description
Spanning Tree
Protocol <Disabled>
Bridge Max Age (6-40
Sec) <20 >
Bridge Hello Time (110 Sec) < 2 >
Bridge Forward Delay
(4-30 sec) <15 >
This field can be toggled between Enabled
and Disabled using the pull-down menu. This
will enable or disable the Spanning Tree
Protocol (STP), globally, for the switch.
The Bridge Maximum Age can be set from 6
to 40 seconds. At the end of the Max. Age, if
a BPDU has still not been received from the
Root Bridge, your switch will start sending
its own BPDU to all other switches for
permission to become the Root Bridge. If it
turns out that your switch has the lowest
Bridge Identifier, it will become the Root
Bridge.
The Bridge Hello Time can be set from 1 to
10 seconds. This is the interval between two
transmissions of BPDU packets sent by the
Root Bridge to tell all other switches that it is
indeed the Root Bridge.
The Bridge Forward Delay can be from 4 to
30 seconds. This is the time any port on the
switch spends in the listening state while
moving from the blocking state to the
forwarding state.
Bridge Priority (0 65535 Sec) <32768>
STP Version Choose rstp or StpCompatibility. Both
TX Hold Count(1-10) This is the maximum number of Hello
Forwarding BPDU
<Enabled>
A Bridge Priority for the switch can be set
from 0 to 65535. This number is used in the
voting process between switches on the
network to determine which switch will be
the root switch. A low number indicates a
high priority, and a high probability that this
switch will be elected as the root switch.
versions use STP parameters in the same
way. RSTP is fully compatible with IEEE
802.1d STP and will function with legacy
equipment.
packets transmitted per interval. The count
can be specified from 1 to 10. The default
value is 3.
This allows you to control whether or not to
forward Bridge Protocol Data Units.
Disabling this setting can be useful if, for
example, the present switch has been
designated as the root bridge and you do not
want that status to change.
Note: The Hello Time cannot be longer than the Max. Age. Otherwise, a configuration error will occur.
Observe the following formulas when setting the above parameters:
Max. Age = 2 x (Forward Delay - 1 second)
Max. Age = 2 x (Hello Time + 1 second)
STP Port Settings
The Spanning Tree Protocol (STP) operates on two levels: on the switch level, the settings are globally implemented. On the port
level, the settings are implemented on a user -defined Group of ports basis.
To configure STP, click the Spanning Tree folder on the Configuration menu and then click on the STP Port Settings link:
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D-Link DES-3350SR Standalone Layer 3 Switch
Figure 7 - 12. STP Port Settings window
In addition to setting Spanning Tree parameters for use on the switch level, the switch allows for the configuration of a group of
ports. This STP Group will use the switch-level parameters entered above, with the addition of Port Priority and Port Cost.
The STP Group spanning tree works in the same way as the switch-level spanning tree, but the root bridge concept is replaced with
a root port concept. A root port is a port of the group that is elected on the basis of port priority and port cost, to be the connection
to the network for the group. Redundant links will be blocked, just as redundant links are blocked on the switch level.
The STP on the switch level blocks redundant links between switches (and similar network devices). The port level STP will block
redundant links within the STP Group.
The following fields can be set:
Parameter Description
From and To Consecutive groups of ports may be
configured starting with the selected port.
State<Disabled> Toggle to enable STP on the selected ports.
Cost A Port Cost can be set from 1 to 200000000 .
The lower the number, the greater the
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D-Link DES-3350SR Standalone Layer 3 Switch
probability the port will be chosen to forward
packets.
Default port cost:
100Mbps port = 200000
Gigabit ports = 20000
Priority A Port Priority can be from 0 to 240. The
lower the number, the greater the probability
the port will be chosen as the Root Port.
Migration <No> Select Yes or No. Choosing Yes will enable
the port to migrate from 802.1d STP status to
802.1w RSTP status. RSTP can coexist with
standard STP, however the benefits of RSTP
are not realized on a port where an 802.1d
network connects to an 802.1w enabled
network. Migration should be enabled (Yes)
on ports connected to network stations or
segments that will be upgraded to 802.1w
RSTP on all or some portion of the segment.
Edge <No> Select Yes or No. Choosing Yes designates
the port as an edge port. Edge ports cannot
create loops, however an edge port can lose
edge port status if a topology change creates
a potential for a loop. An edge port normally
should not receive BPDU packets. If a BPDU
packet is received it automatically loses edge
port status. No indicates the port does not
have edge port status.
P2P <No> Select Yes or No. Choosing Yes indicates a
point-to-point (p2p) shared link. These are
similar to edge ports, however they are
restricted in that a p2p port must operate in
full duplex. Like edge ports, p2p ports
transition to a forwarding state rapidly thus
benefiting from RSTP.
Unicast Forwarding
To enter a MAC address into the switch’s forwarding table, click on the Forwarding Filtering folder on the Configuration menu
and then click Unicast Forwarding:
Figure 7 - 13. Setup Static Unicast Forwarding Table window
The following fields can be set:
Parameter Description
VLAN ID Allows the entry of the VLAN ID of the
MAC Address Allows the entry of the MAC address of an
VLAN the MAC address below is a member of
− when editing. Displays the VLAN ID the
currently selected MAC address is a member
of − when editing an existing entry.
end station that will be entered into the
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D-Link DES-3350SR Standalone Layer 3 Switch
switch’s static forwarding table when adding a
new entry. Displays the currently selected
MAC address when editing.
Allowed to Go Port Allows the selection of the port number on
which the MAC address entered above resides.
Multicast Forwarding
Multicast MAC addresses can be statically entered into the switch’s MAC Address Forwarding Table. These addresses will never
age out.
To enter a Multicast MAC address into the switch’s forwarding table, click on the Forwarding Filtering folder on the
Configuration menu and then click Multicast Forwarding:
Figure 7 - 14. Static Multicast Forwarding Settings window
To add a new multicast MAC address to the Switch’s forwarding table, click the Add button:
Figure 7 - 15. Setup Static Multicast Forwarding Table window
The following fields can be set:
Parameter Description
VID Allows the entry of the VLAN ID of the
Multicast MAC Address Allows the entry of the multicast MAC
Port Select the port number on which the MAC
None Specifies the port as being none.
Egress Specifies the port as being a source of
VLAN the MAC address below is a member
of.
address of an end station that will be entered
into the switch’s static forwarding table.
address entered above resides.
multicast packets originating from the MAC
address specified above.
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D-Link DES-3350SR Standalone Layer 3 Switch
VLANs
A VLAN is a collection of end nodes grouped by logic rather than physical location. End nodes that frequently communicate with
each other are assigned to the same VLAN, regardless of where they are located physically on the network. Logically, a VLAN can
be equated to a broadcast domain, because broadcast packets are forwarded only to members of the VLAN on which the broadcast
was initiated.
VLANs on the DES-3350SR
The DES-3350SR supports IEEE 802.1Q VLANs. The port untagging function can be used to remove the 802.1Q tag from packet
headers to maintain compatibility with devices that are tag-unaware (that is, network devices that do not support IEEE 802.1Q
VLANs or tagging). The switch’s default is to assign all ports to a single 802.1Q VLAN named “default.”
IEEE 802.1Q VLANs
Some relevant terms:
• Tagging – The act of putting 802.1Q VLAN information into the header of a packet.
• Untagging – The act of stripping 802.1Q VLAN information out of the packet header.
• Ingress port – A port on a switch where packets are flowing into the switch and VLAN decisions must be made.
• Egress port – A port on a switch where packets are flowing out of the switch, either to another switch or to an end station,
and tagging decisions must be made.
IEEE 802.1Q (tagged) VLANs are implemented on the DES-3350SR Layer 2 switch. 802.1Q VLANs require tagging, which
enables the VLANs to span an entire network (assuming all switches on the network are IEEE 802.1Q -compliant).
Any port can be configured as either tagging or untagging. The untagging feature of IEEE 802.1Q VLANs allow VLANs to work
with legacy switches that don’t recognize VLAN tags in packet headers. The tagging feature allows VLANs to span multiple
802.1Q-compliant switches through a single physical connection and allows Spanning Tree to be enabled on all ports and work
normally.
802.1Q VLAN Packet Forwarding
Packet forwarding decisions are made based upon the following three types of rules:
• Ingress rules – rules relevant to the classification of received frames belonging to a VLAN.
• Forwarding rules between ports – decides filter or forward the packet
• Egress rules – determines if the packet must be sent tagged or untagged.
Figure 7 - 16. IEEE 802.1Q Packet Forwarding
802.1Q VLAN Tags
The figure below shows the 802.1Q VLAN tag. There are four additional octets inserted after the source MAC address. Their
presence is indicated by a value of 0x8100 in the EtherType field. When a packet’s EtherType field is equal to 0x8100, the packet
carries the IEEE 802.1Q/802.1p tag. The tag is contained in the following two octets and consists of 3 bits or user priority, 1 bit of
Canonical Format Identifier (CFI – used for encapsulating Token Ring packets so they can be carried across Ethernet backbones)
and 12 bits of VLAN ID (VID). The 3 bits of user priority are used by 802.1p. The VID is the VLAN identifier and is used by the
802.1Q standard. Because the VID is 12 bits long, 4094 unique VLANs can be identified.
The tag is inserted into the packet header making the entire packet longer by four octets. All of the information contained in the
packet originally is retained.
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D-Link DES-3350SR Standalone Layer 3 Switch
Figure 7 - 17. IEEE 802.1Q Tag
The EtherType and VLAN ID are inserted after the MAC source address, but before the original EtherType/Length or Logical Link
Control. Because the packet is now a bit longer than it was originally, the Cyclic Redundancy Check (CRC) must be recalculated.
Figure 7 - 18. Adding an IEEE 802.1Q Tag
Static VLAN Entry
The VLAN menu adds an entry to edit the VLAN definitions and to configure the port settings for IEEE 802.1Q VLAN support.
Go to the Configuration menu, select the VLANs folder, and click Static VLAN Entry to open the following window:
Figure 7 - 19. 802.1Q Static VLANs window
To delete an existing 802.1Q VLAN, click the corresponding click -box to the left of the VLAN you want to delete from the switch
and then click the Delete button.
To create a new 802.1Q VLAN, click the Add button:
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D-Link DES-3350SR Standalone Layer 3 Switch
Figure 7 - 20. (Add) 802.1Q Static VLAN window
To edit an existing 802.1Q VLAN, click the corresponding Modify button on the 802.1Q Static VLANs window. The following
window will open:
Figure 7 - 21. (Modify) 802.1Q Static VLAN window
The following fields can then be set in either of the two 802.1Q Static VLAN windows:
Parameter Description
VLAN ID (VID)
VLAN Name
Allows the entry of a VLAN ID in the Add
window, or displays the VLAN ID of an
existing VLAN in the Modify window.
VLANs can be identified by either the
VID or the VLAN name.
Allows the entry of a name for the new
VLAN in the Add window, or for editing
the VLAN name in the Modify window.
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D-Link DES-3350SR Standalone Layer 3 Switch
Advertisement
Port Settings
Tagged/None
None
Egress
Advertising can be enabled or disabled
using this pull-down menu. Advertising
allows members to join this VLAN
through GVRP.
Allows an individual port to be specified
as member of a VLAN.
Allows an individual port to be specified
as Tagging. A check in the Tagged field
specifies the port as a Tagging member
of the VLAN. When an untagged packet
is transmitted by the port, the packet
header is changed to include the 32-bit
tag associated with the VID (VLAN
Identifier – see below). When a tagged
packet exits the port, the packet header
is unchanged.
Allows an individual port to be specified
as None. When an untagged packet is
transmitted by the port, the packet
header remains unchanged. When a
tagged packet exits the port, the tag is
stripped and the packet is changed to an
untagged packet.
Egress Member - specifies the port as
being a static member of the VLAN.
Egress Member Ports are ports that will
be transmitting traffic for the VLAN.
These ports can be either tagged or
untagged.
Forbidden
Forbidden Non-Member - specifies the
port as not being a member of the VLAN
and that the port is forbidden from
becoming a member of the VLAN
dynamically.
Port VLAN ID(PVID)
Packets that are tagged (are carrying the 802.1Q VID information) can be transmitted from one 802.1Q compliant network device
to another with the VLAN information intact. This allows 802.1Q VLANs to span network devices (and indeed, the entire
network – if all network devices are 802.1Q compliant).
Unfortunately, not all network devices are 802.1Q compliant. These devices are referred to as tag-unaware. 802.1Q devices are
referred to as tag-aware.
Prior to the adoption 802.1Q VLANs, port -based and MAC-based VLANs were in common use. These VLANs relied upon a Port
VLAN ID (PVID) to forward packets. A packet received on a given port would be assigned that port’s PVID and then be
forwarded to the port that corresponded to the packet’s destination address (found in the switch’s forwarding table). If the PVID of
the port that received the packet is different from the PVID of the port that is to transmit the packet, the switch will drop the packet.
Within the switch, different PVIDs mean different VLANs. (remember that two VLANs cannot communicate without an external
router). So, VLAN identification based upon the PVIDs cannot create VLANs that extend outside a given switch (or switch stack).
Every physical port on a switch has a PVID. 802.1Q ports are also assigned a PVID, for use within the switch. If no VLANs are
defined on the switch, all ports are then assigned to a default VLAN with a PVID equal to 1. Untagged packets are assigned the
PVID of the port on which they were received. Forwarding decisions are based upon this PVID, insofar as VLANs are concerned.
Tagged packets are forwarded according to the VID contained within the tag. Tagged packets are also assigned a PVID, but the
PVID is not used to make packet forwarding decisions, the VID is.
Tag-aware switches must keep a table to relate PVIDs within the switch to VIDs on the network. The switch will compare the VID
of a packet to be transmitted to the VID of the port that is to transmit the packet. If the two VIDs are different, the switch will drop
the packet. Because of the existence of the PVID for untagged packets and the VID for tagged packets, tag-aware and tag-unaware
network devices can coexist on the same network.
A switch port can have only one PVID, but can have as many VIDs as the switch has memory in its VLAN table to store them.
Because some devices on a network may be tag-unaware, a decision must be made at each port on a tag-aware device before
packets are transmitted – should the packet to be transmitted have a tag or not? If the transmitting port is connected to a tagunaware device, the packet should be untagged. If the transmitting port is connected to a tag-aware device, the packet should be
tagged.
Tagging and Untagging
Every port on an 802.1Q compliant switch can be configured as tagging or untagging.
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D-Link DES-3350SR Standalone Layer 3 Switch
Ports with tagging enabled will put the VID number, priority and other VLAN information into the header of all packets that flow
into and out of it. If a packet has previously been tagged, the port will not alter the packet, thus keeping the VLAN information
intact. The VLAN information in the tag can then be used by other 802.1Q compliant devices on the network to make packet
forwarding decisions.
Ports with untagging enabled will strip the 802.1Q tag from all packets that flow into and out of those ports. If the packet doesn’t
have an 802.1Q VLAN tag, the port will not alter the packet. Thus, all packets received by and forwarded by an untagging port will
have no 802.1Q VLAN information. (Remember that the PVID is only used internally within the switch). Untagging is used to
send packets from an 802.1Q-compliant network device to a non-compliant network device.
Ingress Checking
A port on a switch where packets are flowing into the switch and VLAN decisions must be made is referred to as an ingress port. If
ingress filtering is enabled for a port, the switch will examine the VLAN information in the packet header (if present) and decide
whether or not to forward the packet.
If the packet is tagged with VLAN information, the ingress port will first determine if the ingress port itself is a member of the
tagged VLAN. If it is not, the packet will be dropped. If the ingress port is a member of the 802.1Q VLAN, the switch then
determines if the destination port is a member of the 802.1Q VLAN. If it is not, the packet is dropped. If the destination port is a
member of the 802.1Q VLAN, the packet is forwarded and the destination port transmits it to its attached network segment.
If the packet is not tagged with VLAN information, the ingress port will tag the packet with its own PVID as a VID (if the port is a
tagging port). The switch then determines if the destination port is a member of the same VLAN (has the same VID) as the ingress
port. If it does not, the packet is dropped. If it has the same VID, the packet is forwarded and the destination port transmits it on its
attached network segment.
This process is referred to as ingress filtering and is used to conserve bandwidth within the switch by dropping packets that are not
on the same VLAN as the ingress port at the point of reception. This eliminates the subsequent processing of packets that will just
be dropped by the destination port.
The “Default” VLAN
The switch initially configures one VLAN, VID = 1, called the “default” VLAN. The factory default setting assigns all ports on the
switch to the “default” VLAN.
Packets cannot cross VLANs. If a member of one VLAN wants to connect to another VLAN, the link must be through an external
router.
If no VLANs are configured on the switch, then all packets will be forwarded to any destination port. Packets with unknown
destination addresses will be flooded to all ports. Broadcast and multicast packets will also be flooded to all ports.
The 802.1Q Port Settings window, shown below, allows you to determine whether the switch will share its VLAN configuration
information with other GVRP (GARP VLAN Registration Protocol) -enabled switches. In addition, Ingress Checking can be used
to limit traffic by filtering incoming packets whose PVID does not match the PVID of the port.
To view the 802.1Q Port Settings window, open the Configuration menu, click on VLAN, and then click the Port VLAN ID
(PVID).
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D-Link DES-3350SR Standalone Layer 3 Switch
The following fields can be set:
Parameter Description
From and To
PVID
Figure 7 - 22. 802.1Q Port Settings window
Enter the desired ports in these two
fields.
A Port VLAN Identifier is a classification
mechanism that associates a port with a
specific VLAN and is used to make
forwarding decisions for untagged
packets received by the port. For
example, if port #2 is assigned a PVID of
3, then all untagged packets received on
port #2 will be assigned to VLAN 3. This
number is generally the same as the
VID# number assigned to the port in the
Modify 802.1Q VLANs menu above.
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D-Link DES-3350SR Standalone Layer 3 Switch
GVRP <Disabled>
Ingress <Disabled>
Acceptable Frame
Types
To enable or disable GVRP, globally, on the switch:
The Group VLAN Registration Protocol
(GVRP) enables the port to dynamically
become a member of a VLAN.
This field can be toggled using the space
bar between Enab led and Disabled.
Enabled enables the port to compare the
VID tag of an incoming packet with the
PVID number assigned to the port. If the
two are different, the port filters (drops)
the packet. Disabled disables Ingress
filtering.
This field denotes the type of frame that
will be accepted by the port. The user
may choose between Tagged Only,
which means only VLAN tagged frames
will be accepted, and Admit_All, which
means both tagged and untagged frames
will be accepted. Admit_All is enabled by
default.
Go to the Configuration menu and click Advanced Settings. Toggle the drop-down menu for GVRP Status between Enabled and
Disabled. Click Apply to let your change take effect.
Port Bandwidth
The Bandwidth Settings window allows you to set and display the Ingress bandwidth and Egress bandwidth of specified ports on
the switch.
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Figure 7 - 23. Bandwidth Settings window
To use the bandwidth feature, enter the port or range of ports in the From and To fields. The third field allows you to set the type
of packets being received and/or transmitted by the Switch. Toggle the no_limit setting to Enabled in the fourth field, or if you
prefer, manually enter a value in the Rate field, and then click Apply. Please note that if no_limit is Enabled, the Switch will not
permit you to set the bandwidth rate manually.
SNTP Settings
The DES-3350SR supports Simple Network Time Protocol (SNTP), an adaptation of the Network Time Protocol (NTP). As
specified in RFC -1305 [MIL92], NTP is used to synchronize computer clocks in the global Internet. It provides comprehensive
mechanisms to access national time and frequency dissemination services, organize the time-synchronization subnet, and adjust the
local clock in each participating subnet peer.
The access paradigm is identical to the UDP/TIME Protocol and, in fact, it is usually easy to adapt a UDP/TIME client
implementation to operate using SNTP. Moreover, SNTP is also designed to operate in a dedicated server configuration including
an integrated radio clock. With careful design and control of the various latencies in the system, it is possible to deliver time
accurate to the order of microseconds.
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D-Link DES-3350SR Standalone Layer 3 Switch
Current Time Settin gs
To enable SNTP on the Switch, click SNTP Settings in the Configuration folder and then click Current Time Settings:
Figure 7 - 24. Current Time window
To use SNTP, toggle the SNTP State in the Current Time: SNTP Settings section to Enabled and enter the IP address of the relay
the SNTP Primary Server and/or the SNTP Secondary Server. Enter an SNTP polling interval in the bottom field. The default
setting of 720 seconds is usually fine for most network configurations; a greater polling frequency will draw more network
resources. Click Apply to let your changes take effect.
To complete SNTP configuration, fill in the desired values in the Current Time: Set Current Time section and then click Apply.
Time Zone and DST
To make time zone and Daylight Savings Time changes to the SNTP configuration, click SNTP Settings in the Configuration
folder and then click Time Zone and DST:
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Figure 7 - 25. Time Zone and DST Settings window
This window allows you to set the Daily Saving Time repeated and annual settings. Click Apply to let your changes take effect.
Port Security
A given port’s (or a range of port’s) dynamic MAC address learning can be locked such that the current source MAC addresses
entered into the MAC address forwarding table can not be changed once the port lock is enabled. The port can be locked by
changing the Admin State pull-down menu to Enabled, and clicking Apply.
This is a security feature that prevents unauthorized computers (with source MAC addresses unknown to the switch prior to
locking the port(s), from connecting to the switch’s locked ports and gaining access to the network.
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The following fields can be set:
Parameter Description
From & To Use this to specify a consecutively numbered
Admin State
<Disabled>
Max Learning
Addr.(0-10) <1 >
Lock Address Mode
<Delete On Reset>
Figure 7 - 26. Port Security Settings window
group of ports on the switch for configuration.
Allows the selected port(s) dynamic MAC
address learning to be locked such that new
source MAC addresses cannot be entered into
the MAC address table for the locked port or
group of ports. It can be changed by toggling
between Disabled and Enabled.
Select the maximum number of addresses that
may be learned for the port. The port can be
restricted to 10 or less MAC addresses that are
allowed for dynamically learned MAC
addresses in the forwarding table.
Select Delete On Timeout to clear dynamic
entries for the ports on ti meout of the
Forwarding Data Base (FDB). Specify Delete
On Reset to delete all FDB entries, including
static entries upon system reset or rebooting.
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QOS (Quality of Service)
The DES-3350SR switch supports 802.1p priority queuing. The switch has four priority queues. These priority queues are
numbered from 0 — the lowest priority queue — to 3 — the highest priority queue. The eight priority queues specified in IEEE
802.1p (Q0 to Q7) are mapped to the switch’s priority queues as follows:
Q2 and Q1 are assigned to the switch’s Q0 queue.
Q3 and Q0 are assigned to the switch’s Q1 queue.
Q5 and Q4 are assigned to the switch’s Q2 queue.
Q7 and Q6 are assigned to the switch’s Q3 queue.
The switch’s four priority queues are emptied in a round-robin fashion— beginning with the highest priority queue, and proceeding
to the lowest priority queue before returning to the highest priority queue.
For strict priority-based scheduling, any packets residing in the higher priority queues are transmitted first. Only when these queues
are empty, are packets of lower priority transmitted.
The weighted-priority based scheduling alleviates the main disadvantage of strict priority-based scheduling − in that lower priority
queues get starved of bandwidth − by providing a minimum bandwidth to all queues for transmission. This is accomplished by
configuring the maximum number of packets allowed to be transmitted from a given priority queue and the maximum amount of
time a given priority queue will have to wait before being allowed to tr ansmit its accumulated packets. This establishes a Class of
Service (CoS) for each of the switch’s four hardware priority queues.
The possible range for maximum packets is: 0 to 255 packets.
The possible range for maximum latency is: 0 to 255 (in increments of 16 microseconds each).
Remember that the DES-3350SR has four priority queues (and thus four Classes of Service) for each port on the switch.
Traffic Control
This window allows you to manage traffic control on the switch.
Click Traffic control in the QoS folder on the Configuration menu:
The following fields can be set:
Parameter Description
Group <1> Select the desired group of ports from the
Broadcast Storm
<Disabled>
Figure 7 - 27. Traffic Control Setting window
drop-down menu.
This field can be toggled between Enabled
and Disabled using the drop-down menu.
This enables or disables, globally, the
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D-Link DES-3350SR Standalone Layer 3 Switch
Switch’s reaction to Broadcast storms,
triggered at the threshold set in the last field.
Multicast Storm
<Disabled>
Destination Lookup
Fail <Disabled>
Threshold <128> This is the value in units of packets per
This field can be toggled between Enabled
and Disabled using the drop-down menu.
This enables or disables, globally, the
Switch’s reaction to Multicast storms,
triggered at the threshold set above.
This field can be toggled between Enabled
and Disabled using the drop-down menu.
This enables or disables, globally, the
Switch’s reaction to Destination Address
Unknown storms, triggered at the threshold
set above.
second, beyond which the ingress port for
that block discards packets. Each port
contains three counters, one each for
Broadcast, Multicast, and Destination
Lookup Fail packets. The counters are
cleared every second. If the counter for a
particular type of packet exceeds this
threshold within one second, then further
packets of that type will be dropped.
802.1p Default Priority
The switch allows the assignment of a default 802.1p priority to each port on the switch.
Click 802.1p default_priority in t he QoS folder on the Configuration menu:
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Figure 7 - 28. 802.1p default_priority Settings window
This window allows you to assign a default 802.1p priority to any given port on the switch. The priority queues are numbered from
0 − the lowest priority − to 7 − the highest priority.
802.1p User Priority
The DES-3350SR allows the assignment of a Class of Traffic to each of the 802.1p priorities.
Click 802.1p user_priority in the QoS folder on the Configuration menu:
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D-Link DES-3350SR Standalone Layer 3 Switch
Figure 7 - 29. QoS Class of Traffic window
Once you have assigned a maximum number of packets and a maximum latency to a given Class of Service on the switch, you can
then assign this Class to each of the eight levels of 802.1p priorities.
Scheduling
Click QoS on the Configuration menu, and then click scheduling:
Figure 7 - 30. QoS Output Scheduling window
The Max. Packets(O-255) field specifies the number of packets that a queue will transmit before surrendering the transmit buffer to
the next lower priority queue in a round-robin fashion.
The Max. Latency(0 -255) field specifies the maximum amount of time that a queue will have to wait before being given access to
the transmit buffer. The Max. Latency(0-255) is a priority queue timer. When it expires, it overrides the round-robin and gives the
priority queue that it was set for access to the transmit buffer.
There is a small amount of additional latency introduced because the priority queue that is transmitting at the time the Max.
Latency(0-255) time expires will finish transmitting its current packet before giving up the transmit buffer.
Traffic Segmentation
This window allows you to manage traffic segmentation on the switch.
Click Traffic Segmentation in the QoS folder on the Configuration menu:
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Figure 7 - 31. Traffic Segmentation Setting window
Enter a source port number in the first field and the range of the ports that you want to segment in the second field. For examp le, if
you enter “5” in the first field and “5-8” in the second field, packets from port 5 will only be forwarded to ports 5 to 8. Packets to
port 9, then, will be dropped. Click Apply to let your changes take effect.
LACP
Link Aggregation
Link aggregati on is used to combine a number of ports together to make a single high-bandwidth data pipeline. The participating
parts are called members of a link aggregation group, with one port designated as the master port of the group. Since all members
of the link aggregation group must be configured to operate in the same manner, the configuration of the master port is applied to
all members of the link aggregation group. Thus, when configuring the ports in a link aggregation group, you only need to
configure the master port.
The DES-3350SR supports link aggregation groups, which may include from two to eight switch ports each, except for a Gigabit
link aggregation group which consists of the two (optional) Gigabit Ethernet ports of the front panel.
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Figure 7 - 32. Link Aggregation Group
Data transmitted to a specific host (destination address) will always be transmitted over the same port in a link aggregation group.
This allows packets in a data stream to arrive in the same order they were sent. An aggregated link connection can be made with
any other switch that maintains host-to-host data streams over a single link aggregate port. Switches that use a load-balancing
scheme that sends the packets of a host -to-host data stream over multiple link aggregation ports cannot have an aggregated
connection with the DES-3350SR switch.
Link aggregation is most commonly used to link a bandwidth intensive network device or devices – such as a server – to the
backbone of a network.
The switch allows the creation of up to six link aggregation groups, each group consisting of up to eight links (ports). All of the
ports in the group must be members of the same VLAN. Further, the aggregated links must all be of the same speed and should be
configured as full duplex.
The Spanning Tree Protocol will treat a link aggregation group as a single link. STP will use the port parameters of the Master Port
in the calculation of port cost and in determ ining the state of the link aggregation group. If two redundant link aggregation groups
are configured on the switch, STP will block one entire group – in the same way STP will block a single port that has a redundant
link.
To configure link aggregation, click on the Link Aggregation hyperlink in the Configuration folder to bring up the Link
Aggregation Group Entries table:
Figure 7 - 33. Port Link Aggregation Group window
To configure link aggregation, click the Add button to add a new group and use the Link Aggregation Settings menu (see
example below) to set up groups. To modify a group, click Modify on the corresponding to the entry you wish to alter. To delete a
link aggregation group, click the corresponding button under the Delete heading in the Current Link Aggregation Group Entries
table.
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Figure 7 - 34. Port Link Aggregation Settings (Add) window
Figure 7 - 35. Port Link Aggregation Settings (Modify) window
The following fields can be set:
Parameter Description
Group ID(1-6)
State <Disabled>
Master Port <Port 1>
Member Port
Allows the entry of a number used to
identify the link aggregation group −
when adding a new group. Displays the
Group ID of the currently selected link
aggregation group − when editing and
existing entry.
This field can be toggled between
Enabled and Disabled. This is used to
turn a link aggregation group on or off.
This is useful for diagnostics, to quickly
isolate a bandwidth intensive network
device, or to have an absolute backup
link aggregation group that is not under
automatic control.
The Master port of link aggregation
group.
Allows the specification of the ports that
will make up the link aggregation group.
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Type <Static>
Active Port
Flooding Port
Select Static or LACP (Link Aggregation
Control Protocol).
Shows the port that is currently
forwarding packets.
A trunking group must designate one port
to allow transmission of broadcasts and
unknown unicasts.
After setting the previous parameters, click Apply to allow your changes to be implemented. Successfully created trunk groups
will be show in the Current Link Aggregation Group Entries .
LACP Port
The DES-3350SR supports Link Aggregation Control Protocol. LACP allows you to bundle several physical ports together to form
one logical port. After the LACP negotiation, these candidates for trunking ports can be trunked as a logical port. If any one of the
connected port pairs does not have LACP capability, these two ports will stand as regular ports until the LACP negotiation is
successfully completed. Like the traditional port trunking explained earlier in this manual, the member ports of an LACP trunk
group can only be from a trunk with a peer LACP trunk group.
Figure 7 - 36. Link Aggregation Settings window
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Enter the port range in the From and To fields, select the desired Mode in the next field, and then click Apply to let your changes
take effect.
Access Profile Table
Access profiles allow you to establish criteria to determine whether the Switch will forward packets based on the information
contained in each packet's header. These criteria can be speci fied on a basis of VLAN, MAC address or IP address.
Creating an access profile is divided into two basic parts. The first is to specify which part or parts of a frame the Switch will
examine, such as the MAC source address or the IP destination address. The second part is entering the criteria the Switch will use
to deter mine what to do with the frame. The entire process is described below in two parts.
Part 1
To display the currently configured Access Profiles on the Switch, open the Configuration folder and click on the Access Profile
Table link. This will open the Access Profile Table page, as shown below.
Figure 7 - 37. Access Profile Table
To add an entry to the Access Profile Table, click the Add button. This will open the Access Pro file Configuration page, as
shown below. There are three Access Profile Configuration pages; one for Ethernet (or MAC address-based) profile
configuration, one for IP address-based profile configuration and one for the Packet Content Mask. You can switch between the
three Access Profile Configuration pages by using the Type drop-down menu. The page shown below is the Ethernet Access
Profile Configuration page.
Ethernet
Figure 7 - 38. Access Profile Table (Ethernet)
The following parameters can be set, for the Ethernet type:
Parameter Description
Profile ID (1-255)
Type in a unique identifier number for
this profile set. This value can be set
from 1 - 255.
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Type
VLAN
Source MAC
Destination MAC
Select profile based on Ethernet (MAC
Address), IP address or packet content
mask. This will change the menu
according to the requirements for the
type of profile.
Select Ethernet to instruct the Switch to
examine the layer 2 part of each packet
header.
Select IP to instruct the Switch to
examine the IP address in each frame's
header.
Select Packet Content Mask to specify a
mask to hide the content of the packet
header.
Selecting this option instructs the Switch
to examine the VLAN identifier of each
packet header and use this as the full or
partial criterion for forwarding.
Source MAC Mask - Enter a MAC
address mask for the source MAC
address.
Destination MAC Mask - Enter a MAC
address mask for the destination MAC
address.
802.1p
Ethernet type
Port
Selecting this option instructs the Switch
to examine the 802.1p priority value of
each packet header and use this as the,
or part of the criterion for forwarding.
Selecting this option instructs the Switch
to examine the Ethernet type value in
each frame's header.
The user may set the Access Profile
Table on a per-port basis by entering a
port number in this field. The port list is
specified by listing the lowest switch
number and the beginning port number
on that switch, separated by a colon.
IP
The page shown below is the IP Access Profile Configuration page.
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D-Link DES-3350SR Standalone Layer 3 Switch
Figure 7 - 39. Access Profile Configuration (IP)
The following parameters can be set, for IP:
Parameter Description
Profile ID (1-255)
Type
Type in a unique identifier number for
this profile set. This value can be set
from 1 - 255.
Select profile based on Ethernet (MAC
Address), IP address or packet content
mask. This will change the menu
according to the requirements for the
type of profile.
Select Ethernet to instruct the Switch to
examine the layer 2 part of each packet
header.
Select IP to instruct the Switch to
examine the IP address in each frame's
header.
Select Packet Content Mask to specify a
mask to hide the content of the packet
header.
VLAN
Source IP Mask
Destination IP Mask
DSCP
Protocol
Selecting this option instructs the Switch
to examine the VLAN part of each packet
header and use this as the, or part of the
criterion for forwarding.
Enter an IP address mask for the source
IP address.
Enter an IP address mask for the
destination IP address.
Selecting this option instructs the Switch
to examine the DiffServ Code part of
each packet header and use this as the,
or part of the criterion for forwarding.
Selecting this option instructs the Switch
to examine the protocol type value in
each frame's header. You must then
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D-Link DES-3350SR Standalone Layer 3 Switch
specify what protocol(s) to include
according to the following guidelines:
Select ICMP to instruct the Switch to
examine the Internet Control Message
Protocol (ICMP) field in each frame's
header.
Select Type to further specify that the
access profile will apply an ICMP type
value, or specify Code to further specify
that the access profile will apply an ICMP
code value.
Select IGMP to instruct the Switch to
examine the Internet Group Management
Protocol (IGMP) field in each frame's
header.
Select Type to further specify that the
access profile will apply an IGMP type
value
Select TCP to use the TCP port number
contained in an incoming packet as the
forwarding criterion. Selecting TCP
requires that you specify a source port
mask and/or a destination port mask.
src port mask - Specify a TCP port
mask for the source port in hex form (hex
0x0-0xffff), which you wish to filter.
dest port mask - Specify a TCP port
mask for the destination port in hex form
(hex 0x0-0xffff) which you wish to filter.
Select UDP to use the UDP port number
contained in an incoming packet as the
forwarding criterion. Selecting UDP
requires that you specify a source port
mask and/or a destination port mask.
src port mask - Specify a TCP port
mask for the source port in hex form (hex
0x0-0xffff).
dest port mask - Specify a TCP port
mask for the destination port in hex form
(hex 0x0-0xffff).
protocol id - Enter a value defining the
protocol ID in the packet header to mask.
Specify the protocol ID mask in hex form
(hex 0x0-0xffffffff).
Port
The user may set the Access Profile
Table on a per-port basis by entering an
entry in this field. Entering all will denote
all ports on the Switch. The port list is
specified by listing the lowest switch
number and the beginning port number
on that switch, separated by a colon.
Then the highest switch number, and the
highest port number of the range (also
separated by a colon) are specified. The
beginning and end of the port list range
are separated by a dash. For example,
1:3 specifies switch number 1, port 3. 2:4
specifies switch number 2, port 4. 1:3 2:4 specifies all of the ports between
switch 1, port 3 and switch 2, port 4 − in
numerical order.
Packet Content Mask
The page shown below is the Packet Content Mask configuration window.
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Figure 7 - 40. Access Profile Configuration window (Packet Content Mask)
This screen will aid the user in configuring the Switch to mask packet headers beginning with the offset value specified. The
following fields are used to configure the Packet Content Mask:
Parameter Description
Profile ID (1-255)
Type
Type in a unique identifier number for
this profile set. This value can be set
from 1 -255.
Select profile based on Ethernet (MAC
Address), IP address or packet content
mask. This will change the menu
according to the requirements for the
type of profile.
Select Ethernet to instruct the Switch to
examine the layer 2 part of each packet
header.
Select IP to instruct the Switch to
examine the IP address in each frame's
header.
Select Packet Content Mask to specify a
mask to hide the content of the packet
header.
Offset
This field will instruct the Switch to mask
the packet header beginning with the
offset value specified:
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D-Link DES-3350SR Standalone Layer 3 Switch
value (0-15) - Enter a value in hex form
to mask the packet from the beginning of
the packet to the 15th byte.
value (16 -31) – Enter a value in hex form
to mask the packet from byte 16 to byte
31.
value (32 -47) – Enter a value in hex form
to mask the packet from byte 32 to byte
47.
value (48 -63) – Enter a value in hex form
to mask the packet from byte 48 to byte
63.
value (64 -79) – Enter a value in hex form
to mask the packet from byte 64 to byte
79.
Port
Click Apply to implement changes made.
To establish the rule for a previously created Access Profile:
The user may set the Access Profile
Table on a per-port basis by entering an
entry in this field. Entering all will denote
all ports on the Switch. The port list is
specified by listing the lowest switch
number and the beginning port number
on that switch, separated by a colon.
Then the highest switch number, and the
highest port number of the range (also
separated by a colon) are specified. The
beginning and end of the port list range
are separated by a dash. For example,
1:3 specifies switch number 1, port 3. 2:4
specifies switch number 2, port 4. 1:3 2:4 specifies all of the ports between
switch 1, port 3 and switch 2, port 4 − in
numerical order.
Part 2
IP
In the Configuration folder, click the Access Profile Table link to open the Access Profile Table. Under the heading Access
Rule, clicking Modify, will open the following window.
Figure 7 - 41. Access Rule Table window (IP)
To create a new rule set for an access profile click the Add button. A new window is displayed. To remove a previously created
rule, click the corresponding button.
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Figure 7 - 42. Access Rule Configuration window (IP)
Configure the following Access Rule Configuration settings for IP:
Parameter Description
Profile ID
Mode
Access ID
Type
This is the identifier number for this
profile set.
Select Permit to specify that the packets
that match the access profile are
forwarded by the Switch, according to
any additional rule added (see below).
Select Deny to specify that packets that
do not match the access profile are not
forwarded by the Switch and will be
filtered.
Type in a unique identifier number for
this access. This value can be set from 1
- 50.
Selected profile based on Ethernet
(MAC Address), IP address or Packet
Content Mask .
Ethernet instructs the Switch to examine
the layer 2 part of each packet header.
IP instructs the Switch to examine the IP
address in each frame's header.
Packet Content Mask instructs the
Switch to examine the packet header
Priority (0-7)
This parameter is specified if you want to
re-write the 802.1p default priority
previously set in the Switch, which is
used to determine the CoS queue to
which packets are forwarded to. Once
this field is specified, packets accepted
by the Switch that match this priority are
forwarded to the CoS queue specified
previously by the user.
Replace priority with − Click the
corresponding box if you want to re-write
the 802.1p default priority of a packet to
the value entered in the Priority field,
which meets the criteria specified
previously in this command, before
forwarding it on to the specified CoS
queue. Otherwise, a packet will have its
incoming 802.1p user priority re-written
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to its original value before being
forwarded by the Switch.
For more information on priority queues,
CoS queues and mapping for 802.1p,
see the QoS section of this manual.
Replace Dscp (0-63)
VLAN Name
Source IP
Destination IP
Dscp (0 -63)
Protocol
To view the settings of a previously correctly configured rule, click in the Access Rule Table to view the following screen:
Select this option to instruct the Switch to
replace the DSCP value (in a packet that
meets the selected criteria) with the
value entered in the adjacent field.
Allows the entry of a name for a
previously configured VLAN.
Source IP Address - Enter an IP Address
mask for the source IP address.
Destination IP Address- Enter an IP
Address mask for the destination IP
address.
Destination IP Address- Enter an IP
Address mask for the destination IP
address.
This field allows the user to modify the
protocol used to configure the Access
Rule Table; depending on which
protocol the user has chosen in the
Access Profile Table .
Figure 7 - 43. Access Rule Display window (IP)
Ethernet
To configure the Access Rule for Ethernet, open the Access Profile Table and click Modify for an Ethernet entry. This will open
the following screen:
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Figure 7 - 44. Access Rule Table (Ethernet)
To remove a previously created rule, select it and click the button. To add a new Access Rule, click the Add button:
Figure 7 - 45. Access Rule Configuration window (Ethernet)
To set the Access Rule for Ethernet, adjust the following parameters and click Apply.
Parameter Description
Profile ID
Access ID
Mode
Priority(0-7)
This is the identifier number for this
profile set.
Type in a unique identifier number for
this access. This value can be set from 1
- 50.
Select Permit to specify that the packets
that match the access profile are
forwarded by the Switch, according to
any additional rule added (see below).
Select Deny to specify that packets that
do not match the access profile are not
forwarded by the Switch and will be
filtered.
This parameter is specified if you want to
re-write the 802.1p default priority
previously set in the Switch, which is
used to determine the CoS queue to
which packets are forwarded to. Once
this field is specified, packets accepted
by the Switch that match this priority are
forwarded to the CoS queue specified
previously by the user.
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Replace priority with − Click the
corresponding box if you want to re-write
the 802.1p default priority of a packet to
the value entered in the Priority field,
which meets the criteria specified
previously in this command, before
forwarding it on to the specified CoS
queue. Otherwise, a packet will have its
incoming 802.1p user priority re-written
to its original value before being
forwarded by the Switch.
For more information on priority queues,
CoS queues and mapping for 802.1p,
see the QoS section of this manual.
VLAN Name
Source MAC
Destination MAC
802.1p (0-7)
Ethernet Type
To view the settings of a previously correctly configured rule, click in the Access Rule Table to view the following screen:
Allows the entry of a name for a
previously configured VLAN.
Source MAC Address - Enter a MAC
Address for the source MAC address.
Destination MAC Address - Enter a MAC
Address mask for the destination MAC
address.
Enter a value from 0-7 to specify that the
access profile will apply only to packets
with this 802.1p priority value.
Specifies that the access profile will
apply only to packets with this
hexadecimal 802.1Q Ethernet type value
(hex 0x0-0xffff) in the packet header. The
Ethernet type value may be set in the
form: hex 0x0-0xffff, which means the
user may choose any combination of
letters and numbers ranging from a-f and
from 0-9999.
Figure 7 - 46. Access Rule Display window (Ethernet)
Packet Content Mask
To configure the Access Rule for Packet Content Mask, open the Access Profile Table and click Modify for a Packet Content
Mask entry. This will open the following screen:
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Figure 7 - 47. Access Rule Table (Packet Content Mask)
To remove a previously created rule, select it and click the button. To add a new Access Rule, click the Add button:
Figure 7 - 48. Access Rule Configuration window (Packet Content Mask)
To se t the Access Rule for the Packet Content Mask, adjust the following parameters and click Apply.
Parameter Description
Profile ID
Mode
This is the identifier number for this
profile set.
Select Permit to specify that the packets
that match the access profile are
forwarded by the Switch, according to
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any additional rule added (see below).
Access ID
Type
Offset
Type in a unique identifier number for
this access. This value can be set from 1
- 50.
Selected profile based on Ethernet (MAC
Address), IP address or Packet Content
Mask.
Ethernet instructs the Switch to examine
the layer 2 part of each packet header.
IP instructs the Switch to examine the IP
address in each frame's header.
Packet Content Mask instructs the
Switch to examine the packet header.
This field will instruct the Switch to mask
the packet header beginning with the
offset value specified:
value (0-15) - Enter a value in hex form
to mask the packet from the beginning of
the packet to the 15th byte.
value (16-31) - Enter a value in hex form
to mask the packet from byte 16 to byte
31.
value (32-47) - Enter a value in hex form
to mask the packet from byte 32 to byte
47.
value (48-63) - Enter a value in hex form
to mask the packet from byte 48 to byte
63.
value (64-79) - Enter a value in hex form
to mask the packet from byte 64 to byte
79.
To view the settings of a previously correctly configured rule, click in the Access Rule Table to view the following screen:
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Figure 7 - 49. Access Rule Display window (Packet Content Mask)
IP-MAC Binding
The IP network layer uses a four-byte address. The Ethernet link layer uses a six-byte MAC address. Binding these two address
types together allows the transmission of data between the layers. The primary purpose of IP-MAC binding is to restrict the access
to a switch to a number of authorized users. Only the authorized client can access the Switch’s port by checking the pair of IPMAC addresses with the pre-configured database. If an unauthorized user tries to access an IP-MAC binding enabled port, the
system will block the access by dropping its packet. The maximum number of IP-MAC binding entries is dependant on chip
capability (e.g. the ARP table size) and storage size of the device. For DES-3350SR, the maximum number of IP-MAC Binding
entries is 512. The creation of authorized users can be manually configured by CLI or Web. The function is port-based, this means
a user can enable or disable the function on the individual port.
IP-MAC Binding Port
To enable or disable IP -MAC binding on specific ports, click IP-MAC Binding Port in the IP-MAC Binding folder on the
Configuration Menu to open the IP-MAC Binding Ports Setting window. Select a port or a range of ports with the From and To
fields. Enable or disable the port with the State field. Click Apply to save changes.
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Figure 7 - 50. IP-MAC Binding Ports window
IP-MAC Binding Table
The window shown below can be used to create IP-MAC binding entries. Click the IP-MAC Binding Table on the IP-MAC
Binding folder on the Configuration menu to view the IP-MAC Binding Setting window. Enter the IP and MAC addresses of
the authorized users in the appropriate fields and click Add. To modify either the IP address or the MAC address of the binding
entry, make the desired changes in the appropriate field and Click Modify. To find an IP-MAC binding entry, enter the IP and
MAC addresses and click Find. To delete an entry click Delete. To clear all the entries from the table click Delete all.
Figure 7 - 51. IP-MAC Binding Table window
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IP-MAC Binding Blocked
To view unauthorized devices that have been blocked by IP-MAC binding restrictions open the IP-MAC Binding Blocked
window show below. Click IP-MAC Binding Blocked in the IP-MAC Blocked folder on the Configuration menu to open the
IP-MAC Binding Blocked window.
Figure 7 - 52. IP-MAC Binding Blocked window
To find an unauthorized device that has been blocked by the IP-MAC binding rest rictions, enter the VLAN name and MAC
Address in the appropriate fields and click Find. To delete an entry click the delete button next to the entry’s MAC address. To
delete all the entries in the IP-MAC Binding Blocked Table click Delete All.
Port Access Entity (802.1X)
802.1x Port-Based and MAC-Based Access Control
The IEEE 802.1x standard is a security measure for authorizing and authenticating users to gain access to various wired or wireless
devices on a specified Local Area Network by using a Client and Server based access control model. This is accomplished by using
a RADIUS server to authenticate users trying to access a network by relaying Extensible Authentication Protocol over LAN
(EAPOL) packets between the Client and the Server. The following figure represents a basic EAPOL packet:
Figure 7 - 53. The EAPOL Packet
Utilizing this method, unauthorized devices are restricted from connecting to a LAN through a port to which the user is connected.
EAPOL packets are the only traffic that can be transmitted through the specific port until authorization is granted. The 802.1x
Access Control method holds three roles, each of which are vital to creating and upkeeping a stable and working Access Control
security method.
Figure 7 - 54. The three roles of 802.1x
The following section will explain the three roles of Client, Authenticator and Authentication Server in greater detail.
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Authentication Server
The Authentication Server is a remote device that is connected to the same network as the Client and Authenticator, must be
running a RADIUS Server program and must be configured properly on the Authenticator (Switch). Clients connected to a port on
the Switch must be authenticated by the Authentication Server (RADIUS) before attaining any services offered by the Switch on
the LAN. The role of the Authentication Server is to certify the identity of the Client attempting to access the network by
exchanging secure information between the RADIUS server and the Client through EAPOL packets and, in turn, informs the
Switch whether or not the Client is granted access to the LAN and/or switches services.
Figure 7 - 55. The Authentication Server
Authenticator
The Authenticator (the Switch) is an intermediary between the Authentication Server and the Client. The Authenticator servers two
purposes when utilizing 802.1x. The first purpose is to request certification information from the Client through EAPOL packets,
which is the only information allowed to pass through the Authenticator before access is granted to the Client. The second purpose
of the Authenticator is to verify the information gathered from the Client with the Authentication Server, and to then relay that
information back to the Client.
Three steps must be implemented on the Switch to properly configure the Authenticator.
1. The 802.1x State must be Enabled. (Configuration / Advanced Settings)
2. The 802.1x settings must be implemented by port (Configuration / Port Access Entity / Configure Authenticator )
3. A RADIUS server must be configured on the Switch. (Configuration / Port Access Entity / RADIUS Server)
Figure 7 - 56. The Authenticator
Client
The Client is simply the endstation that wishes to gain access to the LAN or switch services. All endstations must be running
software that is compliant with the 802.1x protocol. For users running Windows XP, that software is included within the operating
system. All other users are required to attain 802.1x client software from an outside source. The Client will request access to the
LAN and or Switch through EAPOL packets and, in turn will respond to requests from the Switch.
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Figure 7 - 57. The Client
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Authentication Process
Utilizing the three roles stated above, the 802.1x protocol provides a stable and secure way of authorizing and authenticating users
attempting to access the network. Only EAPOL traffic is allowed to pass through the specified port before a successful
authentication is made. This port is “locked” until the point when a Client with the correct username and password (and MAC
address if 802.1x is enabled by MAC address) is granted access and therefore successfully “unlocks” the port. Once unlocked,
normal traffic is allowed to pass through the port. The following figure displays a more detailed explanation of how the
authentication process is completed between the three roles stated above.
Figure 7 - 58. The 802.1x Authentication Process
The D-Link implementation of 802.1x allows network administrators to choose between two types of Access Control used on the
Switch, which are:
1. Port-Based Access Control – This method requires only one user to be authenticated per port by a remote RADIUS server
to allow the remaining users on the same port access to the network.
2. MAC-Based Access Control – Using this method, the Switch will automatically learn up to three MAC addresses by port
and set them in a list. Each MAC address must be authenticated by the Switch using a remote RADIUS server before being
allowed access to the Network.
Understanding 802.1x Port-based and MAC-based Network Access Control
The original intent behind the development of 802.1X was to leverage the characteristics of point-to-point in LANs. As any single
LAN segment in such infrastructures has no more than two devices attached to it, one of which is a Bridge Port. The Bridge Port
detects events that indicate the attachment of an active device at the remote end of the link, or an active device becoming inactive.
These events can be used to control the authorization state of the Port and initiate the process of authenticating the attached device
if the Port is unauthorized. This is the Port-Based Network Access Control.
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Port-Based Network Access Control
Ethernet Switch
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
RADIUS
Server
…
802.1X
Client
Network access controlled port
Network access uncontrolled port
Figure 7 - 59. Example of Typical Port-Based Configuration
Once the connected device has successfully been authenticated, the Port then becomes Authorized, and all subsequent traffic on the
Port is not subject to access control restriction until an event occurs that causes the Port to become Unauthorized. Hence, if the Port
is actually connected to a shared media LAN segment with more than one attached device, successfully authenticating one of the
attached devices effectively provides access to the LAN for all devices on the shared segment. Clearly, the security offered in this
situation is open to attack.
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MAC-Based Network Access Control
Ethernet Switch
RADIUS
Server
…
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
802.1X
Client
Network access controlled port
Network access uncontrolled port
Figure 7 - 60. Example of Typical MAC-Based Configuration
In order to successfully make use of 802.1X in a shared media LAN segment, it would be necessary to create “logical” Ports, one
for each attached device that required access to the LAN. The Switch would regard the single physical Port connecting it to the
shared media segment as consisting of a number of distinct logical Ports, each logical Port being independently controlled from the
point of view of EAPOL exchanges and authorization state. The Switch learns each attached devices’ individual MAC addresses,
and effectively creates a logical Port that the attached device can then use to communicate with the LAN via the Switch.
Configure Authenticator
Existing 802.1x port settings are displayed and can be configured using the window below.
Click Configure Authenticator on the PAE Access Entity folder on the Configuration menu to open the 802.1X Authenticator
Settings window:
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Figure 7 - 61. First 802.1X Authenticator Settings window
Click the selection button on the far left that corresponds to the port you want to configure. Use the Authenticator Settings
window shown below to configure settings on individual ports or on a range of ports.
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Figure 7 - 62. Second 802.1X Authenticator Settings window
Configure the following 802.1x port settings:
Parameter Description
Port
AdmDir
Ctl Stat
PortControl
TxPeriod
QuietPeriod
Port being configured for 802.1x settings.
From the pull-down menu, select whether
a controlled Port that is unauthorized will
exert control over communication in both
receiving and transmitting directions, or
just the receiving direction.
This displays whether a controlled Port
that is unauthorized will exert control
over communication in both receiving
and transmitting directions, or just the
receiving direction.
From the pull-down menu, select
forceAuthorized, forceUnauthorized or
auto − Force Authorized forces the
Authenticator of the port to become
Authorized. Force Unauthorized forces
the port to become Unauthorized.
Select the time to wait for a response
from a supplicant (user) to send EAP
Request/Identity packets.
Select the time interval between
authentication failure and the start of a
new authentication attem pt.
SuppTimeout
ServerTimeout
MaxReq
ReAuthPeriod
ReAuth
Select the time to wait for a response
from a supplicant (user) for all EAP
packets, except for the Request/Identity
packets.
Select the length of time to wait for a
response from a Radius server.
Select the maximum number of times to
retry sending packets to the supplicant.
Select the time interval between
successive re-authentications.
Enable or disable re-authentication.
Port Capability Settings
Existing 802.1x port settings are displayed and can be configured using the window below.
Click Port Capability Settings on the PAE Access Entity folder on the Configuration menu to open the 802.1X Capability
Settings window:
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Figure 7 - 63. 802.1X Capability Settings window
To set up the switch’s 802.1x port-based authentication, select which ports are to be configured in the From and To fields. Next,
enable the ports by selecting Authenticator from the drop-down menu under Capability. Click Apply to let your change take
effect.
Configure the following 802.1x port settings:
Parameter Description
From and To
Capability
Ports being configured for 802.1x
settings.
Two role choices can be selected:
Authenticator − A user must pass the
authentication process to gain access to
the network.
None − The port is not controlled by the
802.1x functions.
Initialize Ports for Port Based 802.1x
Existing 802.1x port settings are displayed and can be configured using the window below.
Click Initialize Port(s) on the PAE Access Entity folder on the Configuration menu to open the Initialize Port window:
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Figure 7 - 64. Initialize Port for Port Based 802.1x window
This window allows you to initialize a port or group of ports. The Initialize Por t Table in the bottom half of the window displays
the current status of the port(s) once you have clicked Apply.
This window displays the following information:
Parameter Description
Port
MAC Address
Auth PAE State
Backend_State
Oper Dir
PortStatus The status of the controlled port can be
The port number.
The MAC address of the switch where
the port resides.
The Authenticator PAE State will display
one of the following: Initialize,
Disconnected, Connecting,
Authenticating, Authenticated, Aborting,
Held, ForceAuth, ForceUnauth, and N/A.
The Backend Authentication State will
display one of the following: Request,
Response, Success, Fail, Timeout, Idle,
Initialize, and N/A.
The Operational Controlled Directions
are both and in.
authorized, unauthorized, or N/A.
Initializing Ports for MAC Based 802.1x
To initialize ports for the MAC side of 802.1x, the user must first enable 802.1x by MAC address in the Advanced Settings
window. Click Configuration > Port Access Entity > PAE System Control > Initialize Port(s) to open the following window:
Figure 7 - 65. Initialize Ports for MAC Based 802.1x window
To initialize ports, first choose the switch in the switch stack by using the Unit pull-down menu, then the range of ports in the From
and To field. Then the user must specify the MAC address to be initialized by entering it into the MAC Address field and checking
the corresponding check box. To begin the initialization, click Apply.
NOTE: The user must first globally enable 802.1X in the Advanced
Settings window in the Configuration folder before initializing ports.
Information in the Initialize Ports Table cannot be viewed before
enabling 802.1X.
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Reauthenticate Ports for Port Based 802.1x
This window allows you to reauthenticate a port or group of ports. The Reauthenticate Port Table displays the current status of the
port(s) once you have clicked Apply.
Click Reauthenticate Port(s) on the PAE Access Entity folder on the Configuration menu to open the Reauthenticate Port(s)
window:
Figure 7 - 66. Reauthenticate Port window
This window displays the following information:
Parameter Description
Port The port number.
MAC Address The MAC address of the switch wher e the
Auth State The Authenticator State will display one of
BackendState The Backend State will display one of the
Oper Dir The Operational Controlled Directions are
PortStatus The status of the controlled port can be
port resides.
the following: Initialize, Disconnected,
Connecting, Authenticating, Authenticated,
Aborting, Held, ForceAuth, ForceUnauth,
and N/A.
following: Request, Response, Success, Fail,
Timeout, Idle, Initialize, and N/A.
both and in.
authorized, unauthorized, or N/A.
Reauthenticate Ports for MAC -based 802.1x
To reauthenticate ports for the MAC side of 802.1x, the user must first enable 802.1x by MAC address in the Advanced Settings
window. Click Configuration > Port Access Entity > PAE System Control > Reauthenticate Port(s) to open the following
window:
Figure 7 - 67. Reauthenticate Port(s) for MAC-based 802.1x window
To reauthenticate ports, first choose the switch in the switch stack by using the Unit pull -down menu, then the range of ports in the
From and To field. Then the user must specify the MAC address to be reauthenticated by entering it into the MAC Address field
and checking the corresponding check box. To begin the reauthentication, click Apply.
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RADIUS Server
The RADIUS feature of the switch allows you to facilitate centralized user administration as well as providing protection against a
sniffing, active hacker. The Web Manager offers three windows.
Click Radius Server on the PAE Access Entity folder on the Configuration menu to open the Radius Server Authentication
Setting window:
Figure 7 - 68. Radius Server Authentication Setting window
This window displays the following information:
Parameter Description
Succession <First> Choose the desired RADIUS server to
Radius Server
<0.0.0.0>
Authentic Port <0> Set the RADIUS authentic server(s) UDP
Accounting Port <0> Set the RADIUS account server(s) UDP por t.
Key Set the key the same as that of the RADIUS
Confirm Key Confirm the shared key is the same as that of
Accounting Method This allows you to either Add/Modify or
configure: First, Second or Third.
Set the RADIUS server IP.
port. The default is 1812.
The default is 1813.
server.
the RADIUS server.
Delete an entry on the table in the bottom
half of this window.
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Section 8
Management
Security IP
User Accounts
SNMP V3
This section, arranged by topic, describes how to manage the DES-3350SR via the Management menu.
Security IP
Some settings must be entered to allow the switch to be managed from an SNMP-based Network Management System such as
SNMP v1 or to be able to access the Switch using the Telnet protocol or the Web Manager.
To setup the switch for remote management:
Click the Security IP link in the Management menu:
Figure 8 - 1. Security IP Management window
Management stations are computers on the network that will be used to manage the switch. You can limit the number of possible
management stations by entering up to eight IP addresses. If the eight IP Address fields contain all zeros (“0”), then any station
with any IP address can access the switch to manage and configure it. If there is one or more IP addresses entered in the IP Address
fields, then only stations with the IP addresses entered will be allowed to access the switch to manage or configure it.
User Accounts
From the Management menu, click User Accounts and then the User Account Management window appears.
Figure 8 - 2. User Account Management window
Click Add to add a user.
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Figure 8 - 3. User Account Modify Table window
1. Enter the new user name, assign an initial password, and then confirm the new password. Determine whether the new user
should have Admin or User privileges.
2. Click Apply to make the user addition effective.
3. A listing of all user accounts and access levels is shown in the User Account Management window. This list is updated
when Apply is executed. Click Show All User Account Entries to access this window.
Please remember that Apply makes changes to the switch configuration for the current session only. All changes (including User
additions or updates) must be entered into non-volatile ram using the Save Changes command on the Maintenance menu - if you
want these cha nges to be permanent.
SNMPV3
The DES-3350SR supports the Simple Network Management Protocol (SNMP) versions 1, 2c, and 3. The SNMP version used to
monitor and control the switch can be specified by the administrator. The three versions of SNMP vary in the level of security
provided between the management station and the network device.
SNMP settings are configured using the menus located on the SNMP V3 folder of the Web manager. Workstations on the network
that are allowed SNMP privileged access to the sw itch can be restricted with the Management Station IP Address window.
SNMP User Table
Use the SNMP User Table to create a new SNMP user and add the user to an existing SNMP group or to a newly created group.
Figure 8 - 4. SNMP User Table window
To delete an existing entry, click the selection button in the Delete column on the far right that corresponds to the entry you want to
configure. To create a new entry, click the Add button, a separate window will appear.
Figure 8 - 5. SNMP User Table Configuration window
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To display the current SNMP User Table Configuration, click the User Name in the first column of the SNMP User Table window.
Figure 8 - 6. SNMP User Table Display window
The following parameters are used in the SNMP User Table windows:
Parameter Description
User Name Type in the new SNMP V3 user name or
community string for V1 or V2. This can be
any alphanumeric name of up to 32
characters that will identify the new SNMP
user.
Group Name Type in the new SNMP V3 group name.
Again, this can be any alphanumeric name of
up to 32 characters that will identify the
SNMP group the new SNMP user will be
associated with.
SNMP Version From the pull -down menu select:
V1 – To specifies that SNMP version 1 will
be used.
V2 – To specify that SNMP version 2 will be
used.
V3 – To specify that the SNMP version 3 will
be used.
If Encryption (V3 only) is
checked configure also:
Auth-Protocol
In the Space provided, type an alphanumeric
sting of between 8 and 20 characters that will
be used to authorize the agent to receive
packets for the host.
From the pull -down menu select:
MD5 − To specify that the HMAC-MD5-96
authentication level will be used.
SHA − To specify that the HMAC-SHA-96
authentication level will be used.
If Encryption (V3 only) is
checked configure also:
Priv-Protocol
In the Space provided, type an alphanumeric
string of between 8 and 16 characters that
will be used to encrypt the contents of
messages the host sends to the agent.
SNMP View Table
The SNMP View Table is used to assign views to community strings that define which MIB objects can be accessed by an SNMP
manager.
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Figure 8 - 7. SNMP View Table window
To delete an existing SNMP View Table entry, click the selection button in the Delete column on the far right that corresponds to
the port you want to configure. To create a new entry, click the Add button, a separate window will appear.
Figure 8 - 8. SNMP View Table Configuration window
Parameter Description
View Name Type an alphanumeric string of up to 32
characters. This is used to identify the new
SNMP view being created.
Subtree OID
View Type Select Included to include this object in the
Type the Object Identifier (OID) Subtree for
the view. The OID identifies an object tree
(MIB tree) that will be included or excluded
from access by an SNMP manager.
list of objects that an SNMP manager can
access. Select Excluded to exclude this object
from the list of objects that an SNMP
manager can access.
SNMP Group Table
The SNMP Group created with this table maps SNMP users (identified in the SNMP User Table) to the views created in the
previous menu.
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Figure 8 - 9. SNMP Group Table window
To delete an existing entry, click the selection button in the Delete column on the far right that corresponds to the port you want to
remove. To create a new entry, click the Add button, a separate window will appear.
Figure 8 - 10. SNMP Group Table Configuration window
To display the current SNMP Group Table Configuration, click the Group Name in the first column of the SNMP Group Table
window.
Figure 8 - 11. SNMP Group Table Display window
The following parameters are used in the SNMP Group Table windows:
Parameter Description
Group Name Type an alphanumeric string of up to 32
characters. This is used to identify the new
SNMP group of SNMP users.
Read View Name This name is used to specify the SNMP group
created can request SNMP messages.
Write View Name Specify a SNMP group name for users that
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are allowed SNMP write privileges to the
switch’s SNMP agent.
Notify View Name Specify a SNMP group name for users that
can receive SNMP trap messages generated
by the switch’s SNMP agent.
Security Model Use the pull-down menu to select the SNMP
version. Select one of the following:
SNMPv1 – Specifies that SNMP version 1
will be used.
SNMPv2 – Specifies that SNMP version 2c
will be used. The SNMP v2c supports both
centralized and distributed network
management strategies. It includes
improvements in the Structure of
Management Information (SMI) and adds
some security features.
SNMPv3– Specifies that the SNMP version 3
will be used. SNMP v3 provides secure
access to devices through a combination of
authentication and encrypting packets over
the network.
Security Level Use the pull-down menu to select the SNMP
version:
NoAuthNoPriv − Specifies that there will be
no authorization and no encryption of packets
sent between the switch and a remote SNMP
manager.
AuthNoPriv − Specifies that authorization
will be required, but there will be no
encryption of packets sent between the
switch and a remote SNMP manager.
AuthPriv − Specifies that authorization will
be required, and that packets sent between
the switch and a remote SNMP manger will
be encrypted.
SNMP Community Table
Use this table to create an SNMP community st ring to define the relationship between the SNMP manager and an agent. The
community string acts like a password to permit access to the agent on the switch. One or more of the following characteristics can
be associated with the community string:
• An Access List of IP addresses of SNMP managers that are permitted to use the community string to gain access to the
switch’s SNMP agent.
• An MIB view that defines the subset of all MIB objects that will be accessible to the SNMP community.
• Read/write or read-only level permission for the MIB objects accessible to the SNMP community.
Figure 8 - 12. SNMP Community Table Configuration window
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To delete an existing entry, click the selection button in the Delete column on the far right that corresponds to the port you want to
configure. To create a new entry, configure the parameters as desired in the top part of the window above and click the Apply
button. This will add the new string to the SNMP Community Table.
Configure the following for the new SNMP Community entry:
Parameter Description
Community Name Type an alphanumeric string of up to 32
characters that is used to identify members of
an SNMP community. This string is used
like a password to give remote SNMP
managers access to MIB objects in the
switch’s SNMP agent.
View Name Type an alphanumeric string of up to 32
characters that is used to identify the group of
MIB objects that a remote SNMP manager is
allowed to access on the switch. The view
name must exist in the SNMP View Table.
Access Right Use the pull-down menu to select the access
right:
SNMP Host Table
Use the SNMP Host Table to set up trap recipients.
Figure 8 - 13. SNMP Host Table window
Read_Only − Specifies that SNMP
community members using the community
string created with this command can only
read the contents of the MIBs on the switch.
Read_Write − Specifies that SNMP
community members using the community
string created with this command can read
from and write to the contents of the MIBs on
the switch.
To delete an existing entry, click the selection button in the Delete column on the far right that corresponds to the port you want to
remove. To create a new entry, click the Add button, a separate window will appear.
Figure 8 - 14. SNMP Host Table Configuration window
Parameter Description
Host IP Address Type the IP address of the remote
management station that will serve as the
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SNMP host for the switch.
SNMP Version From the pull -down menu select:
V1 – To specifies that SNMP version 1 will
be used.
V2c – To specify that SNMP version 2 will
be used.
V3 – To specify that the SNMP version 3 will
be used.
Community
String/SNMPv3 User
Name
Type in the community string or SNMP V3
user name as appropriate.
SNMP Engine ID
The Engine ID is a unique identifier used for SNMP V3 implementations. This is an alphanumeric string used to identify the
SNMP engine on the switch.
Figure 8 - 15. SNMP Engine ID Configuration window
To change the Engine ID, type the new Engine ID in the space provided and click the Apply button.
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Section 9
Layer 3 IP Networking
IP Interface Settings
Layer 3 Global Settings
MD5 Key Table Settings
Route Redistribution Settings
Static/Default Route Settings
Static ARP Settings
RIP
OSPF
DHCP/Bootp Relay
DNS Relay
IP Multicast Routing Protocol
This section, arranged by topic, describes how to perform common configuration tasks at the OSI Layer 3 level on the DES3350SR swi tch using the Web-based Manager.
IP Interface Settings
Each VLAN must be configured prior to setting up the VLAN’s corresponding IP interface.
An example is presented below:
VLAN Name VID Switch Ports
System (default) 1 5, 6, 7, 8, 21, 22, 23, 24
Engineer 2 9, 10, 11, 12
Marketing 3 13, 14, 15, 16
Finance 4 17, 18, 19, 20
Sales 5 1, 2, 3, 4
Backbone 6 25, 26
Table 9 - 1. VLAN Example - Assigned Ports
In this case, six IP interfaces are required, so a CIDR notation of 10.32.0.0/11 (or a 11-bit) addressing scheme will work. This
addressing scheme will give a subnet mask of 11111111.11100000.00000000.00000000 (binary) or 255.224.0.0 (decimal).
Using a 10.xxx.xxx.xxx IP address notation, the above example would give 6 network addresses and 6 subnets.
Any IP address from the allowed range of IP addresses for each subnet can be chosen as an IP address for an IP interface on the
switch.
For this example, we have chosen the next IP address above the network address for the IP interface’s IP Address:
VLAN Name VID Network Number IP Address
System (default) 1 10.32.0.0 10.32.0.1
Engineer 2 10.64.0.0 10.64.0.1
Marketing 3 10.96.0.0 10.96.0.1
Finance 4 10.128.0.0 10.128.0.1
Sales 5 10.160.0.0 10.160.0.1
Backbone 6 10.192.0.0 10.192.0.1
Table 9 - 2. VLAN Example - Assigned IP Interfaces
The six IP interfaces, each with an IP address (listed in the table above), and a subnet mask of 255.224.0.0 can be entered into the
IP Interface Settings window.
To setup IP Interfaces on the Switch:
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Go to the Configuration folder, and click on the Layer 3 IP Networking folder, and then click on the IP Interfaces Settings link to
open the following dialog box:
Figure 9 - 1. IP Interface Table window
To setup a new IP interface, click the Add button. To edit an existing IP Interface entry, click on an entry under the Interface Name
heading. Both actions will result in the same screen to configure, as shown below.
Figure 9 - 2. IP Interface Settings – Add
Figure 9 - 3. IP Interface Settings - Edit
Enter a name for the new interface to be added in the Interface Name field (if you are editing an IP interface, the Interface Name
will already be in the top field as seen in the window above). Enter the interface’s IP address and subnet mask in the corresponding
fields. Pull the State pull -down menu to Enabled and click Apply to enter to make the IP interface effective. Use the Save
Changes dialog box from the Maintenance folder to enter the changes into NV-RAM.
The following fields can be set:
Parameters Description
Interface Name
IP Address
Subnet Mask
VLAN Name
This field displays the name for the IP
interface. The default IP interface is
named “System”.
This field allows the entry of an IP
address to be assigned to this IP
interface.
This field allows the entry of a subnet
mask to be applied to this IP interface.
This field allows the entry of the VLAN
Name for the VLAN the IP interface
belongs to.
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State
This field may be altered between
Enabled and Disabled using the pull
down menu. This entry determines
whether the interface will be active or
not.
Layer 3 Global Settings
The L3 Global Settings window allows the user to enable and disable Layer 3 settings and functions from a single window. To
view this window, open the Configuration folder and then the Layer 3 IP Networking folder and click on the L3 Global
Settings link to access the following window.
Figure 9 - 4. Layer 3 Global Settings window
The user may set the following:
Parameters Description
DVMRP State
PIM-DM State
RIP State
Click Apply to implement changes made.
The user may globally enable or disable
the Distance Vector Multicast Routing
Protocol (DVMRP) function by using the
pull down menu.
The user may globally enable or disable
the Protocol Independent Multicast Dense Mode (PIM -DM) function by using
the pull down menu.
The user may globally enable or disable
the Routing Information Protocol (RIP)
function by using the pull down menu.
MD5 Key Table Settings
The MD5 Key Table Configuration menu allows the entry of a 16 character Message Digest − version 5 (MD5) key which can be
used to authenticate every packet exchanged between OSPF routers. It is used as a security mechanism to limit the exchange of
network topology information to the OSPF routing domain.
MD5 Keys created here can be used in the OSPF menu below.
To configure an MD5 Key, click the MD5 Key Table Settings on the Layer 3 IP Networking folder.
Figure 9 - 5. MD5 Key Setting and Table window
The following fields can be set:
Parameters Description
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