D-Link DES-3326S User Manual
DES-3326S
Layer 3 Switch
User’s Guide
First Edition (June, 2001)
651E3326S015
Printed In Taiwan
RECYCLABLE
Wichtige Sicherheitshinweise
1. Bitte lesen Sie sich diese Hinweise sorgfältig durch.
2. Heben Sie diese Anleitung für den spätern Gebrauch auf.
3. Vor jedem Reinigen ist das Gerät vom Stromnetz zu trennen. Vervenden Sie keine
Flüssig- oder Aerosolreiniger. Am besten dient ein angefeuchtetes Tuch zur Reinigung.
4. Um eine Beschädigung des Gerätes zu vermeiden sollten Sie nur Zubehörteile
verwenden, die vom Hersteller zugelassen sind.
5. Das Gerät is vor Feuchtigkeit zu schützen.
6. Bei der Aufstellung des Gerätes ist auf sichern Stand zu achten. Ein Kippen oder
Fallen könnte Verletzungen hervorrufen. Verwenden Sie nur sichere Standorte und
beachten Sie die Aufstellhinweise des Herstellers.
7. Die Belüftungsöffnungen dienen zur Luftzirkulation die das Gerät vor Überhitzung
schützt. Sorgen Sie dafür, daß diese Öffnungen nicht abgedeckt werden.
8. Beachten Sie beim Anschluß an das Stromnetz die Anschlußwerte.
9. Die Netzanschlußsteckdose muß aus Gründen der elektrischen Sicherheit einen
Schutzleiterkontakt haben.
10. Verlegen Sie die Netzanschlußleitung so, daß niemand darüber fallen kann. Es sollete
auch nichts auf der Leitung abgestellt werden.
11. Alle Hinweise und Warnungen die sich am Geräten befinden sind zu beachten.
12. Wird das Gerät über einen längeren Zeitraum nicht benutzt, sollten Sie es vom
Stromnetz trennen. Somit wird im Falle einer Überspannung eine Beschädigung
vermieden.
13. Durch die Lüftungsöffnungen dürfen niemals Gegenstände oder Flüssigkeiten in das
Gerät gelangen. Dies könnte einen Brand bzw. Elektrischen Schlag auslösen.
14. Öffnen Sie niemals das Gerät. Das Gerät darf aus Gründen der elektrischen
Sicherheit nur von authorisiertem Servicepersonal geöffnet werden.
15. Wenn folgende Situationen auftreten ist das Gerät vom Stromnetz zu trennen und von
einer qualifizierten Servicestelle zu überprüfen:
a – Netzkabel oder Netzstecker sint beschädigt.
b – Flüssigkeit ist in das Gerät eingedrungen.
c – Das Gerät war Feuchtigkeit ausgesetzt.
d – Wenn das Gerät nicht der Bedienungsanleitung ensprechend funktioniert oder Sie
mit Hilfe dieser Anleitung keine Verbesserung erzielen.
e – Das Gerät ist gefallen und/oder das Gehäuse ist beschädigt.
f – Wenn das Gerät deutliche Anzeichen eines Defektes aufweist.
16. Bei Reparaturen dürfen nur Orginalersatzteile bzw. den Orginalteilen entsprechende
Teile verwendet werden. Der Einsatz von ungeeigneten Ersatzteilen kann eine weitere
Beschädigung hervorrufen.
17. Wenden Sie sich mit allen Fragen die Service und Repartur betreffen an Ihren
Servicepartner. Somit stellen Sie die Betriebssicherheit des Gerätes sicher.
ii
18. Zum Netzanschluß dieses Gerätes ist eine geprüfte Leitung zu verwenden, Für einen
Nennstrom bis 6A und einem Gerätegewicht grőßer 3kg ist eine Leitung nicht leichter
als H05VV-F, 3G, 0.75mm2 einzusetzen.
WARRANTIES EXCLUSIVE
IF THE D-LINK PRODUCT DOES NOT OPERATE AS WARRANTED ABOVE, THE
CUSTOMER'S SOLE REMEDY SHALL BE, AT D-LINK'S OPTION, REPAIR OR
REPLACEMENT. THE FOREGOING WARRANTIES AND REMEDIES ARE EXCLUSIVE AND
ARE IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, EITHER IN FACT
OR BY OPERATION OF LAW, STATUTORY OR OTHERWISE, INCLUDING WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. D-LINK NEITHER
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LIABILITY IN CONNECTION WITH THE SALE, INSTALLATION MAINTENANCE OR USE OF
D-LINK'S PRODUCTS
D-LINK SHALL NOT BE LIABLE UNDER THIS WARRANTY IF ITS TESTING AND
EXAMINATION DISCLOSE THAT THE ALLEGED DEFECT IN THE PRODUCT DOES NOT
EXIST OR WAS CAUSED BY THE CUSTOMER'S OR ANY THIRD PERSON'S MISUSE,
NEGLECT, IMPROPER INSTALLATION OR TESTING, UNAUTHORIZED ATTEMPTS TO
REPAIR, OR ANY OTHER CAUSE BEYOND THE RANGE OF THE INTENDED USE, OR BY
ACCIDENT, FIRE, LIGHTNING OR OTHER HAZARD.
LIMITATION OF LIABILITY
IN NO EVENT WILL D-LINK BE LIABLE FOR ANY DAMAGES, INCLUDING LOSS OF DATA,
LOSS OF PROFITS, COST OF COVER OR OTHER INCIDENTAL, CONSEQUENTIAL OR
INDIRECT DAMAGES ARISING OUT THE INSTALLATION, MAINTENANCE, USE,
PERFORMANCE, FAILURE OR INTERRUPTION OF A D- LINK PRODUCT, HOWEVER
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D-LINK HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
IF YOU PURCHASED A D-LINK PRODUCT IN THE UNITED STATES, SOME STATES DO
NOT ALLOW THE LIMITATION OR EXCLUSION OF LIABILITY FOR INCIDENTAL OR
CONSEQUENTIAL DAMAGES, SO THE ABOVE LIMITATION MAY NOT APPLY TO YOU.
Limited Warranty
Hardware:
D-Link warrants each of its hardware products to be free from defects in workmanship
and materials under normal use and service for a period commencing on the date of
purchase from D-Link or its Authorized Reseller and extending for the length of time
stipulated by the Authorized Reseller or D-Link Branch Office nearest to the place of
purchase.
This Warranty applies on the condition that the product Registration Card is filled out and
returned to a D-Link office within ninety (90) days of purchase. A list of D-Link offices is
provided at the back of this manual, together with a copy of the Registration Card.
If the product proves defective within the applicable warranty period, D-Link will provide
repair or replacement of the product. D-Link shall have the sole discretion whether to
repair or replace, and replacement product may be new or reconditioned. Replacement
product shall be of equivalent or better specifications, relative to the defective product, but
need not be identical. Any product or part repaired by D-Link pursuant to this warranty
shall have a warranty period of not less than 90 days, from date of such repair,
iv
irrespective of any earlier expiration of original warranty period. When D-Link provides
replacement, then the defective product becomes the property of D-Link.
Warranty service may be obtained by contacting a D-Link office within the applicable
warranty period, and requesting a Return Material Authorization (RMA) number. If a
Registration Card for the product in question has not been returned to D-Link, then a
proof of purchase (such as a copy of the dated purchase invoice) must be provided. If
Purchaser's circumstances require special handling of warranty correction, then at the
time of requesting RMA number, Purchaser may also propose special procedure as may be
suitable to the case.
After an RMA number is issued, the defective product must be packaged securely in the
original or other suitable shipping package to ensure that it will not be damaged in transit,
and the RMA number must be prominently marked on the outside of the package. The
package must be mailed or otherwise shipped to D-Link with all costs of
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firmware, information, or memory data of Purchaser contained in, stored on, or integrated
with any product returned to D-Link pursuant to this warranty.
Any package returned to D-Link without an RMA number will be rejected and shipped
back to Purchaser at Purchaser's expense, and D-Link reserves the right in such a case to
levy a reasonable handling charge in addition mailing or shipping costs.
Software:
Warranty service for software products may be obtained by contacting a D-Link office
within the applicable warranty period. A list of D-Link offices is provided at the back of
this manual, together with a copy of the Registration Card. If a Registration Card for the
product in question has not been returned to a D-Link office, then a proof of purchase
(such as a copy of the dated purchase invoice) must be provided when requesting
warranty service. The term "purchase" in this software warranty refers to the purchase
transaction and resulting license to use such software.
D-Link warrants that its software products will perform in substantial conformance with
the applicable product documentation provided by D-Link with such software product, for
a period of ninety (90) days from the date of purchase from D-Link or its Authorized
Reseller. D-Link warrants the magnetic media, on which D-Link provides its software
product, against failure during the same warranty period. This warranty applies to
purchased software, and to replacement software provided by D-Link pursuant to this
warranty, but shall not apply to any update or replacement which may be provided for
download via the Internet, or to any update which may otherwise be provided free of
charge.
D-Link's sole obligation under this software warranty shall be to replace any defective
software product with product which substantially conforms to D-Link's applicable
product documentation. Purchaser assumes responsibility for the selection of appropriate
application and system/platform software and associated reference materials. D-Link
makes no warranty that its software products will work in combination with any hardware,
or any application or system/platform software product provided by any third party,
excepting only such products as are expressly represented, in D-Link's applicable product
documentation as being compatible. D-Link's obligation under this warranty shall be a
reasonable effort to provide compatibility, but D-Link shall have no obligation to provide
compatibility when there is fault in the third-party hardware or software. D-Link makes
no warranty that operation of its software products will be uninterrupted or absolutely
error-free, and no warranty that all defects in the software product, within or without the
scope of D-Link's applicable product documentation, will be corrected.
vi
D-Link Offices for Registration and Warranty Service
The product's Registration Card, provided at the back of this manual, must be sent to a
D-Link office. To obtain an RMA number for warranty service as to a hardware product,
or to obtain warranty service as to a software product, contact the D-Link office nearest
you. An address/telephone/fax/e-mail/Web site list of D-Link offices is provided in the
back of this manual.
Trademarks
Copyright 2001 D-Link Corporation.
Contents subject to change without prior notice.
D-Link is a registered trademark of D-Link Corporation/D-Link
Systems, Inc. All other trademarks belong to their respective
proprietors.
Copyright Statement
No part of this publication may be reproduced in any form or by any
means or used to make any derivative such as translation,
transformation, or adaptation without permission from D-Link
Corporation/D-Link Systems Inc., as stipulated by the United States
Copyright Act of 1976.
FCC Warning
This equipment has been tested and found to comply with the limits
for a Class A digital device, pursuant to Part 15 of the FCC Rules.
These limits are designed to provide reasonable protection against
harmful interference when the equipment is operated in a commercial
environment. This equipment generates, uses, and can radiate radio
frequency energy and, if not installed and used in accordance with
this user’s guide, may cause harmful interference to radio
communications. Operation of this equipment in a residential area is
likely to cause harmful interference in which case the user will be
required to correct the interference at his own expense.
CE Mark Warning
This is a Class A product. In a domestic environment, this product
may cause radio interference in which case the user may be required
to take adequate measures.
VCCI Warning
BSMI Warning
viii
Table of Contents
Introduction ..........................................................................13
Layer 3 Switching ............................................................... 13
The Functions of a Layer 3 Switch....................................15
Features ............................................................................. 16
Ports ................................................................................16
Performance Features......................................................... 16
Layer 2 Features ..............................................................16
Layer 3 Switch Features................................................... 18
Traffic Classification and Prioritization .............................19
Management ....................................................................19
Switch Stacking.................................................................. 21
Fast Ethernet Technology ................................................... 21
Gigabit Ethernet Technology............................................... 22
Unpacking and Setup............................................................ 23
Unpacking ..........................................................................23
Installation ......................................................................... 24
Desktop or Shelf Installation ............................................ 24
Rack Installation.............................................................. 25
Power on............................................................................. 26
Power Failure ...................................................................27
Identifying External Components ..........................................28
Front Panel.........................................................................28
Rear Panel .......................................................................... 29
Side Panels .........................................................................30
Optional Plug-in Modules ...................................................30
100BASE-FX Fiber Module (2Km/15Km) .........................31
1000BASE-T Module........................................................ 31
1000BASE-SX Fiber Module ............................................32
1000BASE-LX Fiber Module............................................. 33
GBIC Two-Port Module..................................................... 34
Stacking Module with GBIC Port ......................................34
ix
Switch LED Indicators ........................................................ 37
Stacking Module LED Indicators.........................................37
Connecting The Switch.......................................................... 39
Switch to End Node ............................................................39
Switch to Hub or Switch .....................................................40
Switch Stack Connections ..................................................41
10BASE-T Device ............................................................. 42
100BASE-TX Device......................................................... 43
Switch Management and Operating Concepts ....................... 44
Local Console Management ................................................44
Diagnostic (console) port (RS-232 DCE)............................ 45
Managing Switch Stacks..................................................... 46
Switch IP Address............................................................... 49
Traps.................................................................................. 50
SNMP .................................................................................52
MIBs................................................................................... 55
Packet Forwarding ..............................................................56
Filtering.............................................................................. 57
Spanning Tree ....................................................................59
Link Aggregation.................................................................70
VLANs ................................................................................72
IP Addresses .......................................................................81
Internet Protocols ...............................................................90
Packet Headers................................................................... 97
The Domain Name System ................................................105
DHCP Servers ...................................................................106
IP Routing ........................................................................107
ARP .................................................................................. 109
Multicasting .....................................................................110
Multicast Routing Protocols .............................................. 119
Routing Protocols ............................................................. 120
Web-Based Switch Management.......................................... 167
Introduction .....................................................................167
Before You Start ...............................................................168
General Deployment Strategy......................................... 168
x
VLAN Layout ..................................................................169
Assigning IP Network Addresses and Subnet Masks to
VLANs
............................................................................170
Defining Static Routes....................................................171
Getting Started ................................................................. 171
Management..................................................................... 171
Configuring the Switch .....................................................172
User Accounts Management........................................... 172
Saving Changes ................................................................ 175
Factory Reset....................................................................177
USING WEB-BASED MANAGEMENT ................................ 178
Advanced Setup................................................................208
Layer 3 IP Networking....................................................... 215
IP Multicasting .................................................................237
Port Mirroring................................................................... 251
Priority .............................................................................253
Filtering............................................................................ 256
Forwarding ....................................................................... 259
Spanning Tree ..................................................................268
Link Aggregation...............................................................274
Utilities.............................................................................277
Network Monitoring ..........................................................287
Technical Specifications ...................................................... 316
Understanding and Troubleshooting the Spanning Tree
Protocol
...............................................................................319
Blocking State................................................................ 320
Listening State ............................................................... 322
Learning State................................................................ 324
Forwarding State............................................................ 326
Disabled State................................................................ 328
Troubleshooting STP......................................................... 330
Spanning Tree Protocol Failure ......................................330
Full/Half Duplex Mismatch............................................331
Unidirectional Link ........................................................332
Packet Corruption .......................................................... 334
Resource Errors .............................................................334
xi
Identifying a Data Loop .................................................. 335
Avoiding Trouble ............................................................335
Brief Review of Bitwise Logical Operations........................... 342
Index................................................................................... 344
xii
DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
1
INTRODUCTION
This section describes the Layer 3 functionality and Layer 2
and Layer 3 features of the DES-3326S. Some background
information about Ethernet/Fast Ethernet, Gigabit Ethernet,
and switching technology is presented. This is intended for
readers who may not be familiar with the concepts of layered
switching and routing but is not intended to be a complete or
in-depth discussion.
Layer 3 Switching
Layer 3 switching is the integration of two proven technologies:
switching and routing. In fact, Layer 3 switches are running
the same routing routines and protocols as traditional routers.
The main difference between traditional routing and Layer 3
switching is the addition of a group of Layer 2 switching
domains and the execution of routing routines for most
packets via an ASIC – in hardware instead of software.
Where a traditional router would have one, or at best a few,
Fast Ethernet ports, the DES-3326S Layer 3 switch has 24
Fast Ethernet ports and optionally, 2 Gigabit Ethernet ports.
Where a traditional router would have one or two high-speed
serial WAN connections, the DES-3326S relies upon a Fast
13
DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
Ethernet port to connect to a separate device, which in turn,
connects the network to a WAN or the Internet.
The DES-3326S can be thought of as 24 Fast Ethernet Layer 2
switching domains with a wire-speed router between each
domain. It can be deployed in a network between a traditional
router and the intranetwork. The traditional router and its
associated WAN interface would then handle routing between
the intranetwork and the WAN (the Internet, for example) while
the Layer 3 switch would handle routing within the LAN
(between the Fast Ethernet Layer 2 domains). Any installed
Layer 2 switches, and indeed the entire subnetting scheme,
would remain in place.
The DES-3326S can also replace key traditional routers for
data centers and server farms, routing between these locations
and the rest of the network, and providing 24 ports of Layer 2
switching performance combined with wire-speed routing.
Backbone routers can also be replaced with DES-3326S and a
series of DES-3326S could be linked via the optional Gigabit
Ethernet ports. Routers that service WAN connections would
remain in place, but would now be removed from the backbone
and connected to the DES-3326S via an Ethernet/Fast
Ethernet port. The backbone itself could be migrated to
Gigabit Ethernet, or faster technologies as they become
available.
The DES-3326S accomplishes two objectives. First as a tool to
provide high-performance access to enterprise data servers and
infrastructure, and second, to enhance the performance of
network equipment already installed. Many network segments
display poor performance, but the Ethernet wire is only
carrying a fraction of its total traffic capacity. The problem is
not necessarily the network, but the ability of the connected
devices utilize the full capacity of the network. The DES3326S can eliminate network bottlenecks to high-traffic areas,
14 Introduction
DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
and improve the utilization of the network’s installed
bandwidth.
The Functions of a Layer 3 Switch
Traditional routers, once the core components of large
networks, became an obstacle to the migration toward nextgeneration networks. Attempts to make software-based
routers forward packets more quickly were inadequate.
A layer 3 switch does everything to a packet that a traditional
router does:
• Determines forwarding path based on Layer 3
information
• Validates the integrity of the Layer 3 header via
checksum
• Verifies packet expiration and updates accordingly
• Processes and responds to any optional information
• Updates forwarding statistics in the Management
Information Base
A Layer 3 switch can be placed anywhere within a network core
or backbone, easily and cost-effectively replacing the
traditional collapsed backbone router. The DES-3326S Layer 3
switch communicates with a WAN router using a standard
Ethernet/Fast Ethernet port. Multiple DES-3326S switches
can be linked via the optional, 2-port Gigabit Ethernet module.
15
DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
Features
The DES-3326S Switch was designed for easy installation and
high performance in an environment where traffic on the
network and the number of users increase continuously.
Switch features include:
Ports
• 24 high performance NWay ports all operating at 10/100
Mbps with Auto-MDIX function for connecting to end
stations, servers and hubs.
• All ports can auto-negotiate (NWay) between 10Mbps/
100Mbps, half-duplex or full duplex and flow control for
half-duplex ports.
• One front panel slide-in module interface for a 2-port
1000BASE-SX, 1000BASE-LX, 1000BASE-T, 100BASEFX, GBIC or 1-port GBIC & Stack module.
• RS-232 DCE Diagnostic port (console port) for setting up
and managing the Switch via a connection to a console
terminal or PC using a terminal emulation program.
Performance Features
Layer 2 Features
• 8.8 Gbps switching fabric capacity
16 Introduction
DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
• Store and forward switching scheme.
• Full and half-duplex for both 10Mbps and 100Mbps
connections. The front-port Gigabit Ethernet module
operates at full-duplex only. Full-duplex allows the
switch port to simultaneously transmit and receive data,
and only works with connections to full-duplex capable
end stations and switches. Connections to hubs must
take place at half-duplex.
• Supports IEEE 802.3x flow control for full-duplex mode
ports.
• Supports Back-pressure flow control for half-duplex
mode ports.
• Auto-polarity detection and correction of incorrect
polarity on the transmit and receive twisted-pair at each
port.
• IEEE 802.3z compliant for all Gigabit ports (optional
module).
• IEEE 802.3x compliant Flow Control support for all
Gigabit ports (optional module).
• IEEE 802.3ab compliant for 1000BASE-T (Copper)
Gigabit ports (optional module).
• Data forwarding rate 14,880 pps per port at 100% of
wire-speed for 10Mbps speed.
• Data forwarding rate 148,800 pps per port at 100% of
wire-speed for 100Mbps speed.
• Data filtering rate eliminates all error packets, runts, etc.
at 14,880 pps per port at 100% of wire-speed for
10Mbps speed.
17
DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
• Data filtering rate eliminates all error packets, runts, etc.
at 148,800 pps per port at 100% of wire-speed for
100Mbps speed.
• 8K active MAC address entry table per device with
automatic learning and aging (10 to 9999 seconds).
• 8 MB packet buffer per device.
• Broadcast and Multicast storm filtering.
• Supports Port Mirroring.
• Supports Port Trunking – up to six trunk groups (each
consisting of up to eight ports) may be set up.
• 802.1D Spanning Tree support.
• 802.1Q Tagged VLAN support – up to 63 User-defined
VLANs per device (one VLAN is reserved for internal use).
• GVRP – (GARP VLAN Registration Protocol) support for
dynamic VLAN registration.
• 802.1p Priority support with 4 priority queues.
• IGMP Snooping support.
Layer 3 Switch Features
• Wire speed IP forwarding.
• Hardware-based Layer 3 IP switching.
• IP packet forwarding rate of 6.6 Mpps.
• 2K active IP address entry table per device.
18 Introduction
DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
• Supports RIP – (Routing Information Protocol) version I
and II.
• Supports OSPF − (Open Shortest Path First)
• Supports MD5 and Password OSPF Packet
Authentication
• Supports IP version 4.
• IGMP version 1 and 2 support (RFC 1112 and RFC
2236).
• Supports PIM Dense Mode.
• Supports DVMRP.
• Supports IP multi-netting.
• Supports IP packet de-fragmentation.
• Supports 802.1D frame support.
Traffic Classification and Prioritization
• Based on 802.1p priority bits
• 4 priority queues
Management
• RS-232 console port for out-of-band network
management via a console terminal or PC.
• Spanning Tree Algorithm Protocol for creation of
alternative backup paths and prevention of network
loops.
19
DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
• SNMP v.1 Agent.
• Fully configurable either in-band or out-of-band control
via SNMP based software.
• Flash memory for software upgrades. This can be done
in-band via TFTP or out-of-band via the console.
• Built-in SNMP management:
Bridge MIB (RFC 1493)
MIB-II (RFC 1213)
Mini-RMON MIB (RFC 1757) – 4 groups
CIDR MIB (RFC 2096), except IP Forwarding Table.
802.1p MIB (RFC 2674).
RIP MIB v2 (RFC 1724).
IF MIB (RFC 2233)
Ether-Like MIB (RFC 1643)
OSPF MIB (RFC 1850)
• Supports Web-based management.
• CLI management support
• TFTP support.
• BOOTP support.
• BOOTP Relay Agent.
• IP filtering on the management interface.
20 Introduction
DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
• DCHP Client support.
• DCHP Relay Agent.
• DNS Relay Agent.
• Password enabled.
Switch Stacking
The DES-3326 can be used as a standalone or stacked switch
− using the optional stacking module. Up to 6 Switches may be
stacked and managed as a unit with a single IP address.
Management for the entire stack is done through the Master
Switch.
You may add Switches later as needed.
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.
21
DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
Gigabit Ethernet Technology
Gigabit Ethernet is an extension of IEEE 802.3 Ethernet
utilizing the same packet structure, format, and support for
CSMA/CD protocol, full duplex, flow control, 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.
Gigabit Ethernet enables fast optical fiber connections and
Unshielded Twisted Pair connections to support video
conferencing, complex imaging, and similar data-intensive
applications. Likewise, since data transfers occur 10 times
faster than Fast Ethernet, servers outfitted with Gigabit
Ethernet NIC’s are able to perform 10 times the number of
operations in the same amount of time.
22 Introduction
DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
2
UNPACKING AND SETUP
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-3226 24-port Fast Ethernet 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.
23
DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
Installation
Use the following guidelines when choosing a place to install
the Switch:
♦ The surface must support at least 3 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.
24 Unpacking and Setup
DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
Figure 2-1. Installing rubber feet for desktop installation
Rack Installation
The DES-3326S can be mounted in an EIA standard-sized, 19inch 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.
Figure 2- 2A. Attaching the mounting brackets to the switch
25
DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
Then, use the screws provided with the equipment rack to
mount the switch on the rack.
Figure 2-2B. Installing the switch on an equipment rack
Power on
The DES-3326S 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:
26 Unpacking and Setup
DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
♦ 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. will
remain ON if there is a connection at the RS-232 port,
otherwise this LED indicator is OFF.
♦ The 100M LED indicator may remain ON or OFF
depending on the transmission speed.
Power Failure
As a precaution in the event of a power failure, unplug the
switch. When power is resumed, plug the switch back in.
27
DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
3
IDENTIFYING EXTERNAL
COMPONENTS
This chapter describes the front panel, rear panel, optional
plug-in modules, and LED indicators of the DES-3326S.
Front Panel
The front panel of the Switch consists of LED indicators, an
RS-232 communication port, a slide-in module slot, and 24
(10/100 Mbps) Ethernet/Fast Ethernet ports.
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.
28 Identifying External Components
DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
♦ A front-panel slide-in module slot for Gigabit Ethernet
ports can accommodate a 2-port 1000BASE-T Gigabit
Ethernet module, a 2-port 1000BASE-SX Gigabit
Ethernet module, a 2-port 1000BASE-LX Gigabit
Ethernet module, or a 2-port GBIC-based Gigabit
Ethernet module.
♦ Twenty-four high-performance, NWay Ethernet ports all
of which operate at 10/100 Mbps with Auto-MDIX
function for connections to end stations, servers and
hubs. All ports can auto-negotiate between 10Mbps or
100Mbps, full or half duplex, and flow control.
Rear Panel
The rear panel of the switch contains an AC power connector.
Figure 3-2. Rear panel view of the Switch
♦ 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.
Identifying External Components 29
DES-3326S Layer 3 Fast Ethernet Switch User’s Guide
Side Panels
The right side panel of the Switch contains two system fans
(see the top part of the diagram below). The left side panel
contains heat vents.
Figure 3-4. 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.
Optional Plug-in Modules
The DES-3326S 24-port Fast Ethernet Layer 3 Switch is able to
accommodate a range of optional plug-in modules in order to
increase functionality and performance. These modules must
be purchased separately.
30 Identifying External Components
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