Concept Guide

Enabling and Disabling a Port using SNMP................................................................................................................ 973
Fetch Dynamic MAC Entries using SNMP................................................................................................................. 973
Example of Deriving the Interface Index Number...................................................................................................... 974
MIB Objects for Viewing the System Image on Flash Partitions....................................................................... 975
Monitoring BGP sessions via SNMP........................................................................................................................... 975
Monitor Port-Channels..................................................................................................................................................977
Enabling an SNMP Agent to Notify Syslog Server Failure........................................................................................978
Troubleshooting SNMP Operation...............................................................................................................................979
Transceiver Monitoring..................................................................................................................................................979
Conguring SNMP context name............................................................................................................................... 980
54 Stacking...................................................................................................................................................981
Stacking Overview......................................................................................................................................................... 981
Stack Management Roles....................................................................................................................................... 981
Stack Master Election.............................................................................................................................................982
Virtual IP................................................................................................................................................................... 984
Failover Roles........................................................................................................................................................... 984
MAC Addressing on Stacks....................................................................................................................................984
Stacking LAG........................................................................................................................................................... 985
Supported Stacking Topologies............................................................................................................................. 985
High Availability on Stacks......................................................................................................................................986
Management Access on Stacks.............................................................................................................................987
Enabling Mixed-mode Stacking............................................................................................................................. 988
Important Points to Remember................................................................................................................................... 988
Stacking Installation Tasks............................................................................................................................................ 988
Create a Stack......................................................................................................................................................... 988
Add Units to an Existing Stack...............................................................................................................................993
Split a Stack............................................................................................................................................................. 995
Stacking Conguration Tasks.......................................................................................................................................996
Assigning Unit Numbers to Units in an Stack...................................................................................................... 996
Creating a Virtual Stack Unit on a Stack.............................................................................................................. 996
Displaying Information about a Stack....................................................................................................................996
Inuencing Management Unit Selection on a Stack........................................................................................... 999
Managing Redundancy on a Stack...................................................................................................................... 1000
Resetting a Unit on a Stack..................................................................................................................................1000
Verify a Stack Conguration.......................................................................................................................................1000
Displaying the Status of Stacking Ports...............................................................................................................1001
Remove Units or Front End Ports from a Stack...................................................................................................... 1002
Removing a Unit from a Stack..............................................................................................................................1002
Removing Front End Port Stacking..................................................................................................................... 1003
Troubleshoot a Stack................................................................................................................................................... 1003
Recover from Stack Link Flaps.............................................................................................................................1004
Recover from a Card Problem State on a Stack................................................................................................1004
55 Storm Control........................................................................................................................................ 1006
Congure Storm Control.............................................................................................................................................1006
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