Users Guide

Stack Master Election............................................................................................................................................. 797
Virtual IP....................................................................................................................................................................797
Failover Roles............................................................................................................................................................797
MAC Addressing on Stacks.................................................................................................................................... 798
Stacking LAG............................................................................................................................................................799
Supported Stacking Topologies..............................................................................................................................799
High Availability on Stacks......................................................................................................................................800
Management Access on Stacks............................................................................................................................. 801
Important Points to Remember....................................................................................................................................801
Stacking Installation Tasks............................................................................................................................................ 802
Create a Stack..........................................................................................................................................................802
Add Units to an Existing Stack.............................................................................................................................. 806
Split a Stack............................................................................................................................................................. 808
Stacking Conguration Tasks.......................................................................................................................................809
Assigning Unit Numbers to Units in an Stack...................................................................................................... 809
Creating a Virtual Stack Unit on a Stack.............................................................................................................. 809
Displaying Information about a Stack.....................................................................................................................810
Inuencing Management Unit Selection on a Stack.............................................................................................811
Managing Redundancy on a Stack.........................................................................................................................812
Resetting a Unit on a Stack.....................................................................................................................................812
Verify a Stack Conguration......................................................................................................................................... 813
Displaying the Status of Stacking Ports................................................................................................................ 813
Remove Units or Front End Ports from a Stack.........................................................................................................814
Removing a Unit from a Stack................................................................................................................................814
Removing Front End Port Stacking....................................................................................................................... 815
Troubleshoot a Stack..................................................................................................................................................... 815
Recover from Stack Link Flaps...............................................................................................................................816
Recover from a Card Problem State on a Stack.................................................................................................. 816
49 Storm Control...........................................................................................................................................818
Congure Storm Control............................................................................................................................................... 818
Conguring Storm Control from INTERFACE Mode............................................................................................818
Conguring Storm Control from CONFIGURATION Mode.................................................................................819
50 Spanning Tree Protocol (STP)................................................................................................................. 820
Protocol Overview.........................................................................................................................................................820
Congure Spanning Tree............................................................................................................................................... 821
Related Conguration Tasks....................................................................................................................................821
Important Points to Remember.................................................................................................................................... 821
Conguring Interfaces for Layer 2 Mode....................................................................................................................822
Enabling Spanning Tree Protocol Globally...................................................................................................................823
Adding an Interface to the Spanning Tree Group...................................................................................................... 825
Modifying Global Parameters....................................................................................................................................... 825
Modifying Interface STP Parameters..........................................................................................................................826
Enabling PortFast.......................................................................................................................................................... 826
Prevent Network Disruptions with BPDU Guard................................................................................................. 827
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