Concept Guide

Stack Management Roles.......................................................................................................................................948
Stack Master Election.............................................................................................................................................949
Virtual IP................................................................................................................................................................... 950
Failover Roles...........................................................................................................................................................950
MAC Addressing on Stacks....................................................................................................................................950
Stacking LAG........................................................................................................................................................... 952
Supported Stacking Topologies............................................................................................................................. 952
High Availability on Stacks......................................................................................................................................952
Management Access on Stacks............................................................................................................................ 953
Important Points to Remember................................................................................................................................... 953
Stacking Installation Tasks............................................................................................................................................ 954
Create a Stack......................................................................................................................................................... 954
Add Units to an Existing Stack.............................................................................................................................. 958
Split a Stack............................................................................................................................................................. 960
Stacking Conguration Tasks........................................................................................................................................961
Assigning Unit Numbers to Units in an Stack....................................................................................................... 961
Creating a Virtual Stack Unit on a Stack...............................................................................................................961
Displaying Information about a Stack....................................................................................................................962
Inuencing Management Unit Selection on a Stack........................................................................................... 964
Managing Redundancy on a Stack........................................................................................................................964
Resetting a Unit on a Stack................................................................................................................................... 965
Verify a Stack Conguration........................................................................................................................................ 965
Displaying the Status of Stacking Ports............................................................................................................... 965
Remove Units or Front End Ports from a Stack........................................................................................................ 967
Removing a Unit from a Stack............................................................................................................................... 967
Removing Front End Port Stacking.......................................................................................................................968
Troubleshoot a Stack.....................................................................................................................................................968
Recover from Stack Link Flaps..............................................................................................................................968
Recover from a Card Problem State on a Stack................................................................................................. 969
50 Storm Control..........................................................................................................................................970
Congure Storm Control...............................................................................................................................................970
Conguring Storm Control from INTERFACE Mode...........................................................................................970
Conguring Storm Control from CONFIGURATION Mode.................................................................................971
PFC Storm.......................................................................................................................................................................971
Detect PFC Storm................................................................................................................................................... 972
Restore Queue Drop State......................................................................................................................................972
View Details of Storm Control PFC....................................................................................................................... 972
51 Spanning Tree Protocol (STP).................................................................................................................. 974
Protocol Overview......................................................................................................................................................... 974
Congure Spanning Tree...............................................................................................................................................975
Related Conguration Tasks................................................................................................................................... 975
Important Points to Remember....................................................................................................................................975
Conguring Interfaces for Layer 2 Mode....................................................................................................................976
Enabling Spanning Tree Protocol Globally...................................................................................................................977
Contents
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