3Com Switch 7700 User manual

http://www.3com.com/
Switch 7700
Configuration Guide
Published October 2003

3Com Corporation
350 Campus Drive
Marlborough, MA
01752-3064
Copyright © 2003, 3Com Corporation. All rights reserved. No part of this documentation may be reproduced
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UNITED STATES GOVERNMENT LEGEND
If you are a United States government agency, then this documentation and the software described herein
are provided to you subject to the following:
All technical data and computer software are commercial in nature and developed solely at private expense.
Software is delivered as “Commercial Computer Software” as defined in DFARS 252.227-7014 (June 1995)
or as a “commercial item” as defined in FAR 2.101(a) and as such is provided with only such rights as are
provided in 3Com’s standard commercial license for the Software. Technical data is provided with limited
rights only as provided in DFAR 252.227-7015 (Nov 1995) or FAR 52.227-14 (June 1987), whichever is
applicable. You agree not to remove or deface any portion of any legend provided on any licensed program
or documentation contained in, or delivered to you in conjunction with, this User Guide.
Unless otherwise indicated, 3Com registered trademarks are registered in the United States and may or may
not be registered in other countries.
3Com, the 3Com logo, are registered trademarks of 3Com Corporation.
Intel and Pentium are registered trademarks of Intel Corporation. Microsoft, MS-DOS, Windows, and
Windows NT are registered trademarks of Microsoft Corporation. UNIX is a registered trademark in the United
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All other company and product names may be trademarks of the respective companies with which they are
associated.

CONTENTS
ABOUT THIS GUIDE
Conventions 1
SYSTEM ACCESS
Product Overview 3
Function Features 3
Configuring the Switch 7700 4
Setting Terminal Parameters 5
Configuring Through Telnet 8
Configuring Through a Dial-up the Modem 10
Configuring the User Interface 12
Command Line Interface 19
Command Line View 20
Feature and Functions of the Command Line 24
PORT CONFIGURATION
Ethernet Port Overview 27
Ethernet Port Configuration 27
Display and Debug Ethernet Port 33
Ethernet Port Troubleshooting 34
Link Aggregation Configuration 34
Link Aggregation Configuration 34
Display and Debug Link Aggregation 35
Ethernet Link Aggregation Troubleshooting 36
VLAN CONFIGURATION
VLAN Overview 37
Configuring VLAN 37
Display and Debug VLAN 40
GARP/GVRP Configuration 41
Configuring GVRP 43
NETWORK PROTOCOL OPERATION
Configure IP Address 47
Subnet and Mask 47

Configure IP Address 48
Displaying and Debugging an IP Address 49
Troubleshooting an IP Address Configuration 49
ARP Configuration 50
Configure Static ARP 50
DHCP Relay 51
Configuring DHCP Relay 52
Displaying and Debugging DHCP Relay 53
Troubleshooting a DHCP Relay Configuration 55
IP Performance 56
Displaying and Debugging IP Performance 56
Troubleshooting IP Performance 57
ROUTING PROTOCOL OPERATION
IP Routing Protocol Overview 59
Route Selection through the Routing Table 60
Routing Management Policy 61
Static Routes 62
Configuring Static Routes 63
Display and Debug Static Route 64
Static Route Fault Diagnosis and Troubleshooting 66
RIP 66
Configuring RIP 67
Display and Debug RIP 74
RIP Fault Diagnosis and Troubleshooting 75
OSPF 75
Calculating OSPF Routes 76
OSPF Configuration 78
Display and Debug OSPF 94
OSPF Fault Diagnosis and Troubleshooting 97
IP Routing Policy 98
Routing Information Filters 99
Configuring an IP Routing Policy 100
Display and Debug the Routing Policy 105
Routing Policy Fault Diagnosis and Troubleshooting 106
MULTICAST PROTOCOL
IP Multicast Overview 109
Multicast Addresses 110
IP Multicast Protocols 112
IP Multicast Packet Forwarding 113
Application of Multicast 114
GMRP 114
ConfigurING GMRP 114
Displaying and Debugging GMRP 115
IGMP Snooping 116

Configure IGMP Snooping 119
Display and debug IGMP Snooping 120
IGMP Snooping Configuration Example 120
TroubleshootinIGMP Snooping 121
Common Multicast Configuration 121
Common Multicast Configuration 122
Display and Debug Common Multicast Configuration 122
IGMP Configuration 123
IGMP Configuration 124
Display and Debug IGMP 126
PIM-DM Configuration 127
PIM-DM Configuration 128
Display and Debug PIM-DM 129
PIM-DM Configuration Example 130
PIM-SM Configuration 131
PIM-SM Operating Principle 131
Preparations before Configuring PIM-SM 132
PIM-SM Configuration 133
Display and Debug PIM-SM 136
QOS/ACL OPERATION
ACL Overview 141
ACL Supported by Ethernet Switch 142
Configuring ACL 142
Configuring the Time Range 143
Selecting the ACL Mode 143
Defining ACL 143
Activating ACL 146
Displaying and Debugging ACL 146
QoS Overview 147
Traffic 148
Configuring QoS 150
Display and Debug QoS 153
User LogonACL Control Configuration 154
Configure ACL Control over the TELNET User 155
Configure ACL Control over SNMP Users 156
Example: Controlling SNMP Users with ACL 157
STP OPERATION
STP Overview 159
Implementing STP 159
Designated Switch and Designated Port 159
Calculating the STP Algorithm 160
Generating the Configuration BPDU 160
Selecting the Optimum Configuration BPDU 161
Designating the Root Port 161

Configuring the BPDU Forwarding Mechanism 163
Implementing STP on the Switch 7700 163
Configuring RSTP 164
Displaying and Debugging RSTP 173
AAA AND RADIUS OPERATION
IEEE 802.1x 177
802.1x System Architecture 177
Configuring 802.1x 179
Displaying and Debugging 802.1x 183
Configuring the AAA and RADIUS Protocols 185
Configuring AAA 187
Configuring the RADIUS Protocol 190
Displaying and Debugging the AAA and RADIUS Protocols 197
AAA and RADIUS Protocol Fault Diagnosis and Troubleshooting 198
RELIABILITY
VRRP Overview 201
Configuring VRRP 202
Adding and Deleting a Virtual IP Address 202
Configuring the Priority of Switches 203
Configuring Preemption and Delay for a Switch 203
Configuring Authentication Type and Authentication Key 204
Configuring the VRRP Timer 204
Configuring a Switch to Track an Interface 205
Displaying and Debugging VRRP 205
Troubleshooting VRRP 208
SYSTEM MANAGEMENT
File System Management 1
Directory Operation 1
File Operation 2
Storage Device Operation 2
Setting the Prompt Mode of the File System 2
Configuring File Management 3
FTP 4
TFTP 6
MAC Address Table Management 7
MAC Address Table Configuration 8
Display and Debug MAC Address Table 10
Device Management 11
Reboot Ethernet Switch 12
Designate the APP Adopted when Booting the Ethernet Switch Next Time 12
Display and Debug Device Management 13
System Maintenance and Debugging 13

Display the State and Information of the System 14
System Debugging 14
Testing Tools for Network Connection 16
Logging Function 16
SNMP 21
SNMP Versions and Supported MIB 21
Configure SNMP 22
Display and Debug SNMP 26
RMON 28
Configure RMON 28
Display and Debug RMON 30

ABOUT THIS GUIDE
This guide describes the 3Com® Switch 7700 and how to configure it.
Conventions Table 1 and Table 2 list conventions that are used throughout this guide.
Tabl e 1 Notice Icons
Tabl e 2 Text Conventions
Icon Notice Type Description
Information note Information that describes important features or
instructions.
Caution Information that alerts you to potential loss of data
or potential damage to an application, system, or
device.
Warning Information that alerts you to potential personal
injury.
Convention Description
Screen displays This typeface represents information as it appears on the screen.
Keyboard key names If you must press two or more keys simultaneously, the key names are
linked with a plus sign (+), for example:
Press Ctrl+Alt+Del
The words “enter”
and type”
When you see the word “enter” in this guide, you must type
something, and then press Return or Enter. Do not press Return or
Enter when an instruction simply says “type.”
Words in italics Italics are used to:
Emphasize a point.
Denote a new term at the place where it is defined in the text.
Identify command variables.
Identify menu names, menu commands, and software button names.
Examples:
From the Help menu, select Contents.
Click OK.
Words in bold Boldface type is used to highlight command names. For example, “Use
the display user-interface command to...”

2ABOUT THIS GUIDE