3COM 3800 User Manual

SuperStack® II

Switch 3800 User Guide

http://www.3com.com/

Part No. DUA1691-0AAA01

100004-00 Rev. 01

Published April 1998

3Com Corporation 5400 Bayfront Plaza Santa Clara, California 95052-8145

3Com Technologies reserves the right to revise this documentation and to make changes in content from time to time without obligation on the part of 3Com Technologies to provide notiﬁcation of such revision or change.

3Com Technologies provides this documentation without warranty of any kind, either implied or expressed, including, but not limited to, the implied warranties of merchantability and ﬁtness for a particular purpose. 3Com may make improvements or changes in the product(s) and/or the program(s) described in this documentation at any time.

UNITED STATES GOVERNMENT LEGENDS:

If you are a United States government agency, then this documentation and the software described herein are provided to you subject to the following restricted rights:

For units of the Department of Defense:

Restricted Rights Legend:

forth in subparagraph (c) (1) (ii) for Restricted Rights in Technical Data and Computer Software Clause at 48 C.F.R. 52.227-7013. 3Com Technologies, c/o 3Com Limited, 3Com Centre, Boundary Way, Hemel Hempstead, Herts, HP2 7YU, United Kingdom.

For civilian agencies:

Restricted Rights Legend:

(a) through (d) of the Commercial Computer Software - Restricted Rights Clause at 48 C.F.R. 52.227-19 and the limitations set forth in 3Com Corporation’s standard commercial agreement for the software. Unpublished rights reserved under the copyright laws of the United States.

If there is any software on removable media described in this documentation, it is furnished under a license agreement included with the product as a separate document, in the hard copy documentation, or on the removable media in a directory ﬁle named LICENSE.TXT. If you are unable to locate a copy, please contact 3Com and a copy will be provided to you.

Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or may not be registered in other countries.

3Com, EtherLink, SuperStack, and Transcend are registered trademarks of 3Com Corporation and 3TECH is a trademark of 3Com Corporation. 3ComFacts is a service mark of 3Com Corporation.

CompuServe is a registered trademark of CompuServe, Inc. Other brand and product names may be registered trademarks or trademarks of their respective holders.

3Com Corporation, 1998.

Use, duplication, or disclosure by the Government is subject to restrictions as set

Use, reproduction, or disclosure is subject to restrictions set forth in subparagraph

Electromagnetic Compatibility

FCC Statement

This equipment has been tested with a class A computing device and has been found to comply with part 15 of FCC Rules. Operation in a residential area may cause unacceptable interference to radio and TV receptions, requiring the operator to take whatever steps are necessary to correct the interference.

CSA Statement

This Class A digital apparatus meets all requirements of the Canadian interference-Causing Equipment Regulations.

Cet appareil numérique de la classe A respecte toutes les exigences du Règlement sur le matériel brouilleur du Canada.

VCCI Statement

Information To The User

If this equipment does cause interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

■

Reorient the receiving antenna. Relocate the equipment with respect to the receiver.

■

Move the equipment away from the receiver.

■

Plug the equipment into a different outlet so that equipment and receiver are on different branch circuits.

If necessary, the user should consult the dealer or an experienced radio/television technician for additional suggestions. The user may ﬁnd the following booklet prepared by the Federal Communications Commission helpful:

How to Identify and Resolve Radio-TV Interference Problems

This booklet is available from the U.S. Government Printing Ofﬁce, Washington, DC 20402, Stock No. 004-000-00345-4.

In order to meet FCC emissions limits, this equipment must be used only with cables which comply with IEEE 802.3.

iii

ONTENTS

BOUT THIS GUIDE

Introduction 1

Terminology 1 Finding Information in This Guide 2 Conventions 3 Command Syntax Symbols 4 Line-Editing Commands 5 Related Publications 5

WITCH

About the Switch 3800 1-1 Summary of Features 1-1

Network Conﬁguration Example 1-5 Switch 3800 Front View 1-7

Switch 3800 Rear View 1-9

Factory Defaults 1-10

3800 O

Port Connections 1-3

Full-duplex 1-3

Port Redundancy 1-3

Load Sharing 1-4

Switch Operation 1-4

Virtual LANs (VLANs) 1-4 Priority Access Control Enabled (PACE) 1-5 Spanning Tree Protocol (STP) 1-5 IP Unicast Routing 1-5

Ports 1-7 LEDs 1-8

Power Socket 1-9 Serial Number 1-9 MAC Address 1-10 Console Port 1-10

VERVIEW

NSTALLATION AND SETUP

Following Safety Information 2-1 Determining the Switch 3800 Location 2-1

Conﬁguration Rules for Ethernet 2-2

Installing the Switch 3800 2-2

Rack Mounting 2-2 Free-Standing 2-3

Stacking the Switch and Other Devices 2-4 Connecting Equipment to the Console Port 2-4 Powering-up the Switch 2-6 Checking the Installation 2-6

Power On Self-Test (POST) 2-6 Logging on for the First Time 2-6

CCESSING THE SWITCH

Security Access Levels 3-1

User Access Level 3-1

Administrator Access Level 3-2

Default Accounts 3-2

Adding a Password to the Default

Creating a Management Account 3-3

Changing Account Passwords 3-3 Viewing Switch Accounts 3-4 Deleting a Switch Account 3-4

Methods of Managing the Switch 3800 3-4

Using the Console Interface 3-5 Using Telnet 3-5

Conﬁguring Switch IP Parameters 3-5

Using a BOOTP Server 3-5

Manually Conﬁguring the IP Settings 3-6 Disconnecting a Telnet Session 3-7 Disabling Telnet Access 3-8

Using SNMP 3-8

Accessing Switch Agents 3-9 Saving Conﬁguration Changes 3-9 Supported MIBs 3-9 Supported Traps 3-9

admin

Account 3-2

Conﬁguring SNMP Settings 3-10 Displaying SNMP Settings 3-12 Resetting and Disabling SNMP 3-12

Checking Basic Connectivity 3-12

Ping 3-12 Traceroute 3-13

Conﬁguring Ports 3-13

Enabling and Disabling Ports 3-13 Conﬁguring Autonegotiation 3-14 10/100 port settings 3-14 Gigabit port settings 3-14

Load Sharing 3-15

Conﬁguring Load Sharing 3-15 Verifying the Load Sharing Conﬁguration 3-16

Current Limitations of Load Sharing 3-16 SmartRedundancy 3-17 Port Commands 3-17

OMMANDS

Understanding the Command Syntax 4-1

Syntax Helper 4-2

Command Completion 4-2

Abbreviated Syntax 4-2

Command Shortcuts 4-2

Numerical Ranges 4-3

Names 4-3

Symbols 4-3 Line-Editing Commands 4-4 Command History Substitution 4-5 Common Commands 4-5 Switch 3800 Commands 4-6

General Switch Commands 4-7

User Account Commands 4-8

Switch Management Commands 4-9

VLAN Commands 4-10

Protocol Commands 4-11

FDB Commands 4-11

vii

Port Commands 4-12 PACE Commands 4-13 STP Commands 4-14 Basic IP Commands 4-16 IP ARP Commands 4-17 IP Route Table Commands 4-18 ICMP Commands 4-18 RIP Commands 4-20 Logging Commands 4-22 Conﬁguration and Image Commands 4-23

IRTUAL

Overview of Virtual LANs 5-1

Conﬁguring VLANs on the Switch 3800 5-11

Displaying VLAN Settings 5-13 Deleting and Resetting VLANs 5-15

WITCH FORWARDING DATABASE

Overview of the FDB 6-1

LANS (VLANS)

Beneﬁts 5-1 Types of VLANs 5-2

Port-Based VLANs 5-2 Expanding Port-Based VLANs Across Switches 5-4 Tagged VLANs 5-6 Uses of Tagged VLANs 5-6 Assigning a VLAN Tag 5-6 Mixing Port-based and Tagged VLANs 5-8

Protocol-based VLANs 5-8

Predeﬁned Protocol Filters 5-9 Deﬁning Protocol Filters 5-10

VLAN Names 5-10

The Default VLAN 5-11

VLAN Conﬁguration Examples 5-12

FDB Contents 6-1 FDB Entry Types 6-1 PACE Prioritization 6-2 How FDB Entries are Added 6-2

(FDB)

viii

Conﬁguring FDB Entries 6-3

FDB Conﬁguration Example 6-3 Displaying FDB Entries 6-3 Removing FDB Entries 6-4

PANNING TREE PROTOCOL

Overview of the Spanning Tree Protocol 7-1

How STP Works 7-3

Initialization 7-3 Stabilization 7-4 Reconﬁguration 7-4

Spanning Tree Domains 7-4

Defaults 7-5 STP Conﬁgurations 7-6 STP Conﬁgurations to Avoid 7-8 Creating STP Domains 7-9 Enabling STP on the Switch 7-10 Conﬁguring STP 7-10

Conﬁguration Example 7-12 Displaying STP Settings 7-12 Disabling and Resetting STP 7-14

(STP)

IP U

NICAST ROUTING

Overview of IP Unicast Routing 8-1

Router Interfaces 8-1

Populating the Routing Table 8-2

Dynamic Routes 8-3 Static Routes 8-3

Multiple Routes 8-3 Conﬁguring IP Unicast Routing 8-4 Verifying the IP Unicast Routing Conﬁguration 8-5 Conﬁguring DHCP/BOOTP Relay 8-5

Verifying the DHCP/BOOTP Relay Conﬁguration 8-5 Routing Conﬁguration Example 8-10 Displaying Router Settings 8-12 Resetting and Disabling Router Settings 8-13

TATUS MONITORING AND STATISTICS

Status Monitoring 9-1 Port Statistics 9-4 Port Errors 9-6 Switch Logging 9-7

Local Logging 9-8

Real-time Display 9-8 Remote Logging 9-9 Logging Commands 9-10

RMON 9-11

About RMON 9-11 About the RMON Groups 9-12

Statistics 9-12

History 9-12

Alarms 9-13

Events 9-13 Beneﬁts of RMON 9-13

Improving Efﬁciency 9-13

Allowing Proactive Management 9-13

Reducing the Trafﬁc Load 9-13 RMON and the Switch 9-14 RMON Features of the Switch 9-14 About Event Actions 9-15

OFTWARE UPGRADE AND BOOT OPTIONS

Upgrading the Software 10-1

Rebooting the Switch 10-2

Saving Conﬁguration Changes 10-2

Returning to Factory Defaults 10-3

Boot Option Commands 10-3

AFETY INFORMATION

Important Safety Information A-1

Power A-1 Power Cord A-2 Fuse A-3

Fiber Optic Ports A-3 Lithium Battery A-4

L’information de Sécurité Importante A-4

Power A-5 Cordon électrique A-6 Fuse A-6 Ports pour ﬁbres optiques A-7 Batterie au lithium A-7

Wichtige Sicherheitsinformationen A-8

Power A-8 Power Cord A-9 Fuse A-9 Faseroptikanschlüsse - Optische Sicherheit A-10 Lithiumbatterie A-11

ECHNICAL SPECIFICATIONS

ROUBLESHOOTING

LEDs C-1 Using the Command-Line Interface C-2

VLANs C-4 STP C-5 Routing C-6

ECHNICAL SUPPORT

Online Technical Services D-1

World Wide Web Site D-1 3Com Bulletin Board Service D-1

Access by Analog Modem D-1

Access by Digital Modem D-2 3ComFactsSM Automated Fax Service D-2 3ComForum on CompuServe® Online Service D-3

Support from Your Network Supplier D-3 Support from 3Com D-4 Returning Products for Repair D-5

LOSSARY

NDEX

3COM C

ORPORATION LIMITED WARRANTY

xii

BOUT

About This Guide provides an overview of this guide, describes guide conventions, tells you where to look for speciﬁc information and lists other publications that may be useful.

HIS

UIDE

Introduction This guide provides the required information to install and conﬁgure

the SuperStack This guide is intended for use by network administrators who are

responsible for installing and setting up network equipment. It assumes a basic working knowledge of:

■ Local Area Networks (LANs)

■ Ethernet concepts

■ Ethernet switching and bridging concepts

■ Simple Network Management Protocol (SNMP)

■ IP Routing

The Release Notes shipped with the Switch 3800 may contain information that updates or overrides information in this guide. You should always follow the information in the Release Notes if it is different from the information given in this guide.

Terminology Throughout this guide, the term Switch 3800 is used to refer to the

SuperStack II Switch 3800. For deﬁnitions of other terms used in this guide, refer to the

“Glossary,” located at the end of the user guide.

II Switch 3800 (3C16910).

The terms Forwarding Database and Switch Database are interchangeable.

2 ABOUT THIS GUIDE

Finding Information in This Guide

This table shows where to ﬁnd speciﬁc information in this guide.

Task Location

Learning concepts Chapter 1, “Switch 3800 Overview” Installing the Switch 3800 Chapter 2, “Installation and Setup”

Appendix A, “Safety Information” Setting up user accounts Chapter 3, “Accessing The Switch” Understanding the

Command-Line Interface Creating a VLAN Chapter 5, “Virtual LANs (VLANs)” Understanding the Switch

Forwarding Database (FDB) Configuring Spanning Tree

Protocol parameters Configuring IP Unicast Routing Chapter 8, “IP Unicast Routing Monitoring Chapter 9, “Status Monitoring and Statistics” Saving the Switch configuration Chapter 10, “Software Upgrade and Boot

Upgrading the Switch software Chapter 10, “Software Upgrade and Boot

Technical Specifications Appendix B, “Technical Specifications” Troubleshooting Appendix C, “Troubleshooting” Getting technical support Appendix D, “Technical Support” Identifying terms “Glossary”

Chapter 4, “Commands”

Chapter 6, “Switch Forwarding Database (FDB)”

Chapter 7, “Spanning Tree Protocol (STP)”

Options”

Conventions 3

Conventions Table 1 and Table 2 list conventions that are used throughout this

guide.

Table 1 Notice Icons

Icon Notice Type Alerts you to...

Note Important features or instructions

Caution Risk of personal injury, system damage, or loss

of data

Warning Risk of severe personal injury

Table 2 Text Conventions

Convention Description

Screen displays This typeface represents information as it appears on the

screen.

The words “enter” and “type”

When you see the word “enter” in this guide, you must type something, and then press the Return or Enter key. Do not press the Return or Enter key when an instruction simply says “type.”

[Key] names Key names appear in text in one of two ways:

■ Referred to by their labels, such as “the Return key” or

“the Escape key”

■ Written with brackets, such as [Return] or [Esc]

If you must press two or more keys simultaneously, the key names are linked with a plus sign (+). Example:

Press [Ctrl]+[Alt]+[Del].

Words in italicized type

Words in boldface

Italics emphasize a point or denote new terms at the place where they are defined in the text.

Bold text denotes key features.

type

4 ABOUT THIS GUIDE

Command Syntax Symbols

You may see a variety of symbols shown as part of the command syntax. These symbols explain how to enter the command, and you do not type them as part of the command itself. Table 3 summarizes command syntax symbols.

Table 3 Command Syntax Symbols

Symbol Description

angle brackets < > Enclose a variable or value. You must specify the variable or value. For example, in

square brackets [ ] Enclose a required value or list of required arguments. One or more values or

vertical bar | Separates mutually exclusive items in a list, one of which must be entered. For

braces { } Enclose an optional value or a list of optional arguments. One or more values or

the syntax

config vlan <name> ipaddress <ip_address>

you must supply a VLAN name for <name> and an address for <ip_address> when entering the command. Do not type the angle brackets.

arguments can be specified. For example, in the syntax

disable vlan [<name> | all]

you must specify either the VLAN name for <name>, or the keyword “all” when entering the command. Do not type the square brackets.

example, in the syntax

config snmp community [read | write] <string>

you must specify either the read or write community string in the command. Do not type the vertical bar.

arguments can be specified. For example, in the syntax

show vlan {<name> | all}

you can specify either a particular VLAN or the keyword “all.” If you do not specify an argument, the command will show all VLANs. Do not type the braces.

Line-Editing Commands 5

Line-Editing Commands

Table 4 describes the line-editing commands available using the command-line interface.

Table 4 Line-Editing Commands

Command Description

Backspace Deletes character to the left of cursor and shifts remainder of line to left. Delete or [Ctrl] + D Deletes character under cursor and shifts remainder of line to left. [Ctrl] + K Deletes characters from under cursor to the end of the line. Insert Toggles on and off. When toggled on, inserts text and pushes previous text to right. Left Arrow Moves cursor to left. Right Arrow Moves cursor to right. Home or [Ctrl]+A Moves cursor to first character in line. End or [Ctrl]+E Moves cursor to last character in line. [Ctrl]+L Clears the screen and moves the cursor to the beginning of the line. Up Arrow Displays the previous command in the command history buffer, and places cursor at

Down Arrow Displays the next command in the command history buffer, and places cursor at end

end of command.

of command.

The command syntax is explained in Chapter 4.

Related Publications

The Switch 3800 documentation set includes the following:

■ SuperStack II Switch 3800 Quick Reference Guide.

Part Number DQA1691-OAAA01.

■ SuperStack II Switch 3800 Quick Installation Guide.

Part Number DIA1691-OAAA01.

■ SuperStack II Switch 3800 Release Note.

Part Number DNA1691-OAAA01.

3Com’s home page can be found at the following web site:

■ http://www.3com.com/

6 ABOUT THIS GUIDE

SWITCH 3800 OVERVIEW

This chapter describes the following:

■ Switch 3800 features

■ How to use the Switch 3800 in your network conﬁguration

■ Switch 3800 front view

■ Switch 3800 rear view

■ Factory default settings

About the Switch 3800

Summary of Features

Network managers are currently faced with the challenge of creating networks that can provide high-speed and high performance to serve the needs of today’s network users.

Part of the 3Com SuperStack

II range of products, the Switch 3800 provides switching and IP Routing between multiple 10BASE-T/100BASE-TX ports and one Gigabit Ethernet port.

The Switch 3800 has the following features:

■ 24 autosensing 10BASE-T/100BASE-TX ports, one Gigabit Ethernet

port, and one redundant Gigabit Ethernet port

■ Support for 12,000 addresses in the Switch forwarding database

■ Fully nonblocking operation

■ All ports transmit and receive packets at wire speed

■ Full-duplex operation

■ 2Mb packet memory

1-2 CHAPTER 1: SWITCH 3800 OVERVIEW

■ Virtual LANs (VLANs)

■ Support for 64 VLANs on a single Switch 3800

■ Support for IEEE 802.1Q tagging

■ Controls trafﬁc (including broadcasts)

■ Provides extra security

■ Protocol-sensitive ﬁltering for VLANs

■ Recognition of the Priority Access Control Enabled (PACE) bit set by

3Com Etherlink

■ Responds to 802.3x ﬂow-control messages

■ Autonegotiation to IEEE 802.3z for Gigabit Ethernet

■ Load sharing

■ Spanning Tree Protocol (IEEE 802.1d)

■ Multiple spanning trees (64)

■ Wire speed Internet Protocol (IP) via Routing Information Protocol

adapters and the other devices that support PACE

(RIP) version 1 and RIP version 2

■ Wire speed Internet Protocol (IP) unicast routing

■ 3Com’s SuperStack

■ Integrated network management

■ 19-inch rack or free-standing mounting

■ Agent support

■ Simple Network Management Protocol (SNMP)

■ Remote Monitoring (RMON) groups 1 to 4 — statistics, history,

II architecture

alarms, and events

■ Repeater and Bridge Management Information Base (MIB)

■ Easy software upgrades

■ BOOTP for automatic Internet Protocol (IP) address conﬁguration

■ Local management

Summary of Features 1-3

Port Connections The Switch 3800 has 24 autosensing 10BASE-T/100BASE-TX ports with

standard RJ-45 connectors, and supports one Gigabit Ethernet port, and one redundant Gigabit Ethernet port with standard Gigabit Interface Connectors (GBICs). You must have a 3Com-approved GBIC module (such as 3C16911) inserted to make use of these ports. You can connect other Gigabit Ethernet devices (such as 10/100 Switches that have Gigabit Ethernet modules) to the Switch 3800. You can also connect Switch 3800 devices to each other.

10BASE-T/100BASE-TX ports are conﬁgured as MDIX (crossover). A crossover cable will typically be needed to connect these ports to another 3Com Switch.

Full-duplex The Switch 3800 provides full-duplex support for all ports. Full-duplex

allows frames to be transmitted and received simultaneously and, in effect, doubles the bandwidth available on a link. All 10/100 Mbps ports on the Switch 3800 autonegotiate for half- or full-duplex operation.

Port Redundancy The Switch 3800 has an optional redundant Gigabit Ethernet port to

provide resilient links. Using the redundant port (the redundant port is labeled 25-Standby), you can dual-home to one or two Switches. Figure 1-1 illustrates a Switch 3800 dual-homed to two different Switches.

Dual-homed

Standby

Figure 1-1 Dual-homing conﬁguration

Main

1-4 CHAPTER 1: SWITCH 3800 OVERVIEW

In the event that the active main port fails or loses link status, the standby port is automatically activated. When the main port resumes operation, the standby port becomes inactive. This feature can be disabled.

Load Sharing Load sharing with Switch 3800 Switches allows the user to increase

bandwidth and resilience between Switches by using a group of ports to carry trafﬁc in parallel between Switches. The sharing algorithm allows the Switch to use multiple ports as a single logical port. For example, Virtual LANs (VLANs) see the load-sharing group as a single virtual port. The algorithm also guarantees packet sequencing between clients.

For information on load sharing, refer to Chapter 3.

Switch Operation The Switch 3800 uses the same algorithm as a conventional 802.1d

bridge for ﬁltering, forwarding, and learning packets.

Virtual LANs (VLANs)

The Switch 3800 has a Virtual LAN (VLAN) feature that allows you to build your network segments without being restricted by physical connections. A VLAN is a group of location- and topology-independent devices that communicate as if they are on the same physical Local Area Network (LAN). Implementing VLANs on your network has the following three advantages:

■ It eases the change and movement of devices on networks. If a

device in VLAN marketing is moved to a port in another part of the network, all you must do is specify that the new port belongs to VLAN marketing.

■ It helps to control broadcast trafﬁc. If a device in VLAN marketing

transmits a broadcast frame, only VLAN marketing devices receive the frame.

■ It provides extra security. Devices in VLAN marketing can only

communicate with devices on VLAN sales using a device that provides routing services.

For more information on VLANs, refer to Chapter 5.

Network Configuration Example 1-5

Priority Access Control Enabled (PACE)

The Switch recognizes the PACE bit set by 3Com Etherlink

adapters and other devices supporting PACE. When enabled, trafﬁc with these bits receives priority service from the Switch.

Spanning Tree Protocol

(STP)

The Switch 3800 supports the IEEE 802.1d Spanning Tree Protocol (STP), which is a bridge-based mechanism for providing fault tolerance

on networks. STP allows you to implement parallel paths for network trafﬁc, and ensure the following:

■ Redundant paths are disabled when the main paths are operational.

■ Redundant paths are enabled if the main trafﬁc paths fail.

For more information on STP, refer to Chapter 7.

IP Unicast Routing

The Switch 3800 can route IP trafﬁc between the VLANs conﬁgured as virtual router interfaces. Both dynamic and static IP routes are maintained in the routing table. RIP version 1 and RIP version 2 are supported.

For more information on IP unicast routing, refer to Chapter 8.

Network Conﬁguration Example

This section describes where to position the Switch 3800 within your network. One common use of the Switch 3800 is on a Gigabit Ethernet backbone. Figure 1-2 shows an example of a Gigabit Ethernet backbone within a building.

1-6 CHAPTER 1: SWITCH 3800 OVERVIEW

Switch 1100

Switch 3300

Switch 3800

To Backbone

Key

Ethernet Fast Ethernet

Gigabit Ethernet

Server Workstation

Figure 1-2 Switch 3800 used in a backbone conﬁguration

The Switch 1100 on each ﬂoor has a 100Mbps full-duplex link to the Switch 3800. A Switch 3300 is connected to a group of servers on one ﬂoor of the building. The Switch 3800 routes IP trafﬁc between the IP subnets on each ﬂoor, and also provides bridged connectivity for non-IP trafﬁc. The Gigabit Ethernet port on the Switch 3800 connects into a Gigabit Ethernet campus backbone.

Using Gigabit Ethernet as a backbone technology removes bottlenecks by providing scalable bandwidth, low-latency, and high-speed data switching.

Switch 3800 Front View 1-7

In addition to providing a fast backbone between Ethernet LANs, Gigabit Ethernet equipped ﬁle servers and services may be directly attached to the Switch 3800 providing improved performance to the Ethernet desktop.

Switch 3800 Front View

10/100 Mbps ports

Figure 1-3 shows the Switch 3800 front view.

Unit status LEDs

10/100 Mbps ports

12345678 9101112131415 16 17 18 19 20 21 22 23 24

25 25 25 25

Gigabit Ethernet portsPort status LEDs

Figure 1-3 Switch 3800 front view

The front panel has the following features:

Ports

The Switch 3800 has 24 autosensing 10BASE-T/100BASE-TX ports using standard RJ-45 connectors, and supports one Gigabit Ethernet port, and one redundant Gigabit Ethernet port using standard Gigabit Interface Connectors (GBICs). You must have a GBIC transceiver module inserted to make use of these ports.

The Switch 3800 ports support the media types and distances listed in Table 1-1.

1-8 CHAPTER 1: SWITCH 3800 OVERVIEW

Table 1-1 Media Types and Distances

Standard Media Type Mhz/Km Rating Maximum Distance

10BASE-T Category 3 UTP Cable (10Mbps) 100 Meters 100BASE-TX Category 5 UTP Cable (100Mbps) 100 Meters 1000BASE-SX

(850 nm)

1000BASE-LX (1300 nm)

62.5/125 um Multimode fiber

62.5/125 um Multimode fiber 50/125 um Multimode fiber 50/125 um Multimode fiber

62.5/125 um Multimode fiber 50/125 um Multimode fiber 50/125 um Multimode 10u Single-mode fiber

160 200 400 500

500 400 500 NA

220 Meters 275 Meters 500 Meters 550 Meters

550 Meters 550 Meters 550 Meters 5,000 Meters

For more information on 1000BASE-SX and 1000BASE-LX characteristics refer to IEEE Draft P802.3z/D4.2 Tables 38-2 and 38-6.

LEDs

Table 1-2 describes the LED behavior on the Switch 3800.

Table 1-2 Switch 3800 LEDs

LED Color Indicates 10/100Mbps Port Status LEDs

Green Yellow

Green flashing Off

Gigabit Ethernet Port Status LEDs

Packet Yellow

Off

Status Green

Green flashing Off

(continued)

Link is present; port is enabled. Frames are being transmitted/received on this

port. Link is present; port is disabled. Link is not present.

Frames are being transmitted/received on this port.

No activity on this port. Link is present; port is enabled; full-duplex

operation. Link is present; port is disabled. Link is not present.

Table 1-2 Switch 3800 LEDs (continued)

LED Color Indicates Unit Status LEDs

Power Green

Yellow

The Switch 3800 is powered up. The Switch 3800 is indicating a power,

overheat, or fan failure.

MGMT Green

Green flashing

The Switch 3800 is operating normally. Software download is in progress.

Power On Self Test (POST) is in progress.

Yellow

The Switch 3800 has failed its POST, or is indicating an overheat condition.

Switch 3800 Rear View 1-9

Switch 3800 Rear View

Power socket and fuse Console port

Figure 1-4 shows the Switch 3800 rear view.

LUL

3C16990

SERIAL NUMBER MAC ADDRESS

MADE IN USA

MAIN ASSEMBLY

Figure 1-4 Switch 3800 rear view

The rear panel has the following features:

Power Socket

The Switch 3800 automatically adjusts to the supply voltage. The power supply operates down to 90 V. The fuse is suitable for both 110 V AC and 220-240 V AC operation.

Serial Number

The serial number uniquely identiﬁes this unit. You may need this serial number for fault-reporting purposes.

1-10 CHAPTER 1: SWITCH 3800 OVERVIEW

MAC Address

This label shows the unique Ethernet MAC address assigned to this device.

Console Port

The console port (9-pin, “D” type connector) is used to connect a terminal and to carry out local out-of-band management.

Factory Defaults Table 1-3 shows the factory defaults for the Switch 3800 features.

Table 1-3 Switch 3800 Factory Defaults

Item Default Setting

Port status Enabled on all ports Default user account admin with no password and user with no

Console port configuration 9600 baud, eight data bits, one stop bit, no

SNMP read community string Public SNMP write community string Private RMON history session Enabled RMON alarms Enabled

PACE Recognition disabled Virtual LANs One VLAN named default; all ports belong to the

802.1Q tagging All packets are untagged on the default VLAN

BOOTP Enabled on the default VLAN (default) Spanning Tree Protocol Disabled; one defined as “s0” IP Routing Disabled Forwarding database aging

period RIP Protocol Disabled Autonegotiation On

password

parity, XON/XOFF flow control enabled

■ Send trap if load is greater than 75% of

available bandwidth

■ Send trap if there are more than 10 errors in

1,000 packets

default VLAN; no protocol filter used.

(default)

30 minutes

INSTALLATION AND SETUP

This chapter describes the following:

■ How to decide where to install the Switch 3800

■ Ethernet conﬁguration rules

■ How to install the Switch in a rack or free-standing

■ How to connect equipment to the console port

■ How to check the installation using the Power On Self-Test (POST)

Following Safety Information

Determining the Switch 3800 Location

Before installing or removing any components of the Switch, or before carrying out any maintenance procedures, you must read the safety information provided in Appendix A of this guide.

The Switch 3800 is suited for use in the ofﬁce, where it can be free-standing or mounted in a standard 19-inch equipment rack. Alternatively, the device can be rack-mounted in a wiring closet or equipment room. Two mounting brackets are supplied with the Switch.

CAUTION: When using a rack mounting system, the Switch must be mounted on a shelf or runners. The rack mounting brackets alone are not sufﬁcient to support the weight of the Switch. The rack mounting brackets are provided to ensure stability across the horizontal plane. If you stack Switches, you must ensure that the shelf or runners are strong enough to hold the combined weight. Ensure that the ventilation holes are not obstructed.

After deciding where to install the Switch, make sure that:

■ You will be able to meet the conﬁguration rules detailed in

Chapter 1.

■ The Switch is accessible and cables can be connected easily.

2-2 CHAPTER 2: INSTALLATION AND SETUP

■ Water or moisture cannot enter the case of the unit.

■ Temperature must be within the range of 0 to 40 degrees Celsius.

■ Air-ﬂow around the unit and through the vents in the side of the

case is not restricted. You should provide a minimum of 25mm (1-inch) clearance.

■ No objects are placed on top of the unit.

■ Units are not stacked more than four high if the Switch is

free-standing.

Conﬁguration Rules

for Ethernet

Installing the Switch 3800

Rack Mounting The Switch 3800 is 2U high and will ﬁt in most standard 19-inch racks.

The connectors, supported media types, and maximum distances for the Switch 3800 are described in Chapter 1.

The Switch 3800 can be mounted in a rack, or placed free-standing on a tabletop.

CAUTION: The Switch should only be used in a rack if it is mounted on runners, a shelf, or a tray to support the weight. The rack mount kits alone are not sufﬁcient to support the weight of the Switch. The rack mount kits must not be used to suspend the Switch from under a table or desk, or attach it to a wall.

To install the mounting brackets on the Switch, follow these steps:

1 Place the Switch the right way up on a hard ﬂat surface, with the front

facing toward you.

2 Remove the existing screws from the sides of the chassis. 3 Locate a mounting bracket over the mounting holes on one side of the

unit.

4 Insert the four screws and fully tighten with a suitable screwdriver, as

shown in Figure 2-1.

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