Administrator Guide

Troubleshooting SNMP Operation...............................................................................................................................885
Transceiver Monitoring................................................................................................................................................. 886
Conguring SNMP context name................................................................................................................................887
52 Stacking.................................................................................................................................................. 888
Stacking Overview........................................................................................................................................................ 888
Cross Platform Stacking.........................................................................................................................................888
Stack Management Roles.......................................................................................................................................889
Stack Master Election.............................................................................................................................................889
Virtual IP....................................................................................................................................................................893
Failover Roles........................................................................................................................................................... 893
MAC Addressing on Stacks....................................................................................................................................893
Stacking LAG........................................................................................................................................................... 896
Supported Stacking Topologies............................................................................................................................. 896
High Availability on Stacks...................................................................................................................................... 897
Management Access on Stacks............................................................................................................................ 898
Important Points to Remember................................................................................................................................... 899
Stacking Installation Tasks............................................................................................................................................ 899
Create a Stack......................................................................................................................................................... 899
Add Units to an Existing Stack...............................................................................................................................902
Split a Stack............................................................................................................................................................. 905
Stacking Conguration Tasks.......................................................................................................................................905
Assigning Unit Numbers to Units in an Stack...................................................................................................... 905
Creating a Virtual Stack Unit on a Stack.............................................................................................................. 905
Displaying Information about a Stack....................................................................................................................906
Inuencing Management Unit Selection on a Stack........................................................................................... 909
Managing Redundancy on a Stack.........................................................................................................................910
Resetting a Unit on a Stack.................................................................................................................................... 910
Verify a Stack Conguration..........................................................................................................................................911
Displaying the Status of Stacking Ports.................................................................................................................911
Removing a Unit from a Stack......................................................................................................................................912
Troubleshoot a Stack..................................................................................................................................................... 914
Recover from Stack Link Flaps...............................................................................................................................914
Recover from a Card Problem State on a Stack.................................................................................................. 914
53 Storm Control.......................................................................................................................................... 916
Congure Storm Control............................................................................................................................................... 916
Conguring Storm Control from INTERFACE Mode........................................................................................... 916
Conguring Storm Control from CONFIGURATION Mode.................................................................................917
54 Spanning Tree Protocol (STP)..................................................................................................................918
Protocol Overview..........................................................................................................................................................918
Congure Spanning Tree............................................................................................................................................... 919
Related Conguration Tasks....................................................................................................................................919
Important Points to Remember....................................................................................................................................919
Conguring Interfaces for Layer 2 Mode....................................................................................................................920
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