Concept Guide

Failover Roles........................................................................................................................................................... 939
MAC Addressing on Stacks....................................................................................................................................939
Stacking LAG............................................................................................................................................................ 941
Supported Stacking Topologies.............................................................................................................................. 941
High Availability on Stacks.......................................................................................................................................941
Management Access on Stacks............................................................................................................................ 942
Important Points to Remember................................................................................................................................... 942
Stacking Installation Tasks............................................................................................................................................ 943
Create a Stack..........................................................................................................................................................943
Add Units to an Existing Stack...............................................................................................................................947
Split a Stack............................................................................................................................................................. 949
Stacking Conguration Tasks.......................................................................................................................................950
Assigning Unit Numbers to Units in an Stack...................................................................................................... 950
Creating a Virtual Stack Unit on a Stack.............................................................................................................. 950
Displaying Information about a Stack.....................................................................................................................951
Inuencing Management Unit Selection on a Stack........................................................................................... 953
Managing Redundancy on a Stack........................................................................................................................953
Resetting a Unit on a Stack....................................................................................................................................954
Verify a Stack Conguration........................................................................................................................................ 954
Displaying the Status of Stacking Ports............................................................................................................... 954
Remove Units or Front End Ports from a Stack........................................................................................................956
Removing a Unit from a Stack...............................................................................................................................956
Removing Front End Port Stacking.......................................................................................................................957
Troubleshoot a Stack.....................................................................................................................................................957
Recover from Stack Link Flaps.............................................................................................................................. 957
Recover from a Card Problem State on a Stack................................................................................................. 958
50 Storm Control..........................................................................................................................................959
Congure Storm Control.............................................................................................................................................. 959
Conguring Storm Control from INTERFACE Mode...........................................................................................959
Conguring Storm Control from CONFIGURATION Mode................................................................................960
PFC Storm......................................................................................................................................................................960
Detect PFC Storm....................................................................................................................................................961
Restore Queue Drop State...................................................................................................................................... 961
View Details of Storm Control PFC........................................................................................................................961
51 Spanning Tree Protocol (STP)..................................................................................................................963
Protocol Overview.........................................................................................................................................................963
Congure Spanning Tree.............................................................................................................................................. 964
Related Conguration Tasks...................................................................................................................................964
Important Points to Remember................................................................................................................................... 964
Conguring Interfaces for Layer 2 Mode................................................................................................................... 965
Enabling Spanning Tree Protocol Globally.................................................................................................................. 966
Adding an Interface to the Spanning Tree Group...................................................................................................... 968
Modifying Global Parameters.......................................................................................................................................968
Modifying Interface STP Parameters..........................................................................................................................969
Contents
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