Administrator Guide

Stack Management Roles.......................................................................................................................................799
Stack Master Election.............................................................................................................................................800
Virtual IP................................................................................................................................................................... 800
Failover Roles........................................................................................................................................................... 800
MAC Addressing on Stacks.....................................................................................................................................801
Stacking LAG........................................................................................................................................................... 802
Supported Stacking Topologies............................................................................................................................. 802
High Availability on Stacks......................................................................................................................................803
Management Access on Stacks............................................................................................................................ 804
Important Points to Remember................................................................................................................................... 804
Stacking Installation Tasks............................................................................................................................................805
Create a Stack......................................................................................................................................................... 805
Add Units to an Existing Stack.............................................................................................................................. 809
Split a Stack...............................................................................................................................................................811
Stacking Conguration Tasks........................................................................................................................................812
Assigning Unit Numbers to Units in an Stack....................................................................................................... 812
Creating a Virtual Stack Unit on a Stack............................................................................................................... 812
Displaying Information about a Stack.....................................................................................................................813
Inuencing Management Unit Selection on a Stack............................................................................................ 814
Managing Redundancy on a Stack.........................................................................................................................815
Resetting a Unit on a Stack.................................................................................................................................... 815
Verify a Stack Conguration......................................................................................................................................... 816
Displaying the Status of Stacking Ports................................................................................................................ 816
Remove Units or Front End Ports from a Stack.........................................................................................................817
Removing a Unit from a Stack................................................................................................................................ 817
Removing Front End Port Stacking........................................................................................................................818
Troubleshoot a Stack......................................................................................................................................................818
Recover from Stack Link Flaps...............................................................................................................................819
Recover from a Card Problem State on a Stack.................................................................................................. 819
49 Storm Control...........................................................................................................................................821
Congure Storm Control............................................................................................................................................... 821
Conguring Storm Control from INTERFACE Mode............................................................................................821
Conguring Storm Control from CONFIGURATION Mode................................................................................ 822
50 Spanning Tree Protocol (STP)................................................................................................................. 823
Protocol Overview......................................................................................................................................................... 823
Congure Spanning Tree...............................................................................................................................................824
Related Conguration Tasks................................................................................................................................... 824
Important Points to Remember....................................................................................................................................824
Conguring Interfaces for Layer 2 Mode....................................................................................................................825
Enabling Spanning Tree Protocol Globally...................................................................................................................826
Adding an Interface to the Spanning Tree Group...................................................................................................... 828
Modifying Global Parameters....................................................................................................................................... 828
Modifying Interface STP Parameters..........................................................................................................................829
Enabling PortFast.......................................................................................................................................................... 829
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