Concept Guide

Assigning a VLAN Alias............................................................................................................................................ 981
Displaying the Ports in a VLAN...............................................................................................................................981
Add Tagged and Untagged Ports to a VLAN....................................................................................................... 982
Managing Overload on Startup....................................................................................................................................983
Enabling and Disabling a Port using SNMP................................................................................................................984
Fetch Dynamic MAC Entries using SNMP................................................................................................................. 984
Example of Deriving the Interface Index Number..................................................................................................... 985
MIB Objects for Viewing the System Image on Flash Partitions.......................................................................986
Monitoring BGP sessions via SNMP...........................................................................................................................986
Monitor Port-Channels................................................................................................................................................. 988
Enabling an SNMP Agent to Notify Syslog Server Failure....................................................................................... 989
Troubleshooting SNMP Operation...............................................................................................................................990
Transceiver Monitoring................................................................................................................................................. 990
Conguring SNMP context name................................................................................................................................991
54 Stacking.................................................................................................................................................. 992
Stacking Overview........................................................................................................................................................ 992
Stack Management Roles.......................................................................................................................................992
Stack Master Election.............................................................................................................................................993
Virtual IP................................................................................................................................................................... 995
Failover Roles........................................................................................................................................................... 995
MAC Addressing on Stacks....................................................................................................................................995
Stacking LAG........................................................................................................................................................... 996
Supported Stacking Topologies............................................................................................................................. 996
High Availability on Stacks...................................................................................................................................... 997
Management Access on Stacks............................................................................................................................ 998
Enabling Mixed-mode Stacking............................................................................................................................. 999
Important Points to Remember................................................................................................................................... 999
Stacking Installation Tasks............................................................................................................................................999
Create a Stack......................................................................................................................................................... 999
Add Units to an Existing Stack.............................................................................................................................1004
Split a Stack............................................................................................................................................................1006
Stacking Conguration Tasks......................................................................................................................................1007
Assigning Unit Numbers to Units in an Stack.....................................................................................................1007
Creating a Virtual Stack Unit on a Stack.............................................................................................................1007
Displaying Information about a Stack...................................................................................................................1007
Inuencing Management Unit Selection on a Stack.......................................................................................... 1010
Managing Redundancy on a Stack........................................................................................................................1011
Resetting a Unit on a Stack....................................................................................................................................1011
Verify a Stack Conguration.........................................................................................................................................1011
Displaying the Status of Stacking Ports...............................................................................................................1012
Remove Units or Front End Ports from a Stack....................................................................................................... 1013
Removing a Unit from a Stack.............................................................................................................................. 1013
Removing Front End Port Stacking...................................................................................................................... 1014
Troubleshoot a Stack....................................................................................................................................................1014
Recover from Stack Link Flaps............................................................................................................................. 1015
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