Administrator Guide

MAC Addressing on Stacks....................................................................................................................................889
Stacking LAG........................................................................................................................................................... 890
Supported Stacking Topologies............................................................................................................................. 890
High Availability on Stacks.......................................................................................................................................891
Management Access on Stacks............................................................................................................................ 892
Mixed-mode Stacking............................................................................................................................................. 893
Important Points to Remember................................................................................................................................... 894
Stacking Installation Tasks............................................................................................................................................ 894
Create a Stack..........................................................................................................................................................894
Add Units to an Existing Stack...............................................................................................................................899
Split a Stack.............................................................................................................................................................. 901
Stacking Conguration Tasks........................................................................................................................................901
Assigning Unit Numbers to Units in an Stack...................................................................................................... 902
Creating a Virtual Stack Unit on a Stack.............................................................................................................. 902
Displaying Information about a Stack....................................................................................................................902
Inuencing Management Unit Selection on a Stack........................................................................................... 905
Managing Redundancy on a Stack........................................................................................................................905
Resetting a Unit on a Stack................................................................................................................................... 906
Enabling Mixed-mode Stacking............................................................................................................................. 906
Verify a Stack Conguration.........................................................................................................................................907
Displaying the Status of Stacking Ports................................................................................................................907
Remove Units or Front End Ports from a Stack........................................................................................................908
Removing a Unit from a Stack...............................................................................................................................908
Removing Front End Port Stacking.......................................................................................................................909
Troubleshoot a Stack..................................................................................................................................................... 910
Recover from Stack Link Flaps...............................................................................................................................910
Recover from a Card Problem State on a Stack.................................................................................................. 910
52 Storm Control.......................................................................................................................................... 912
Congure Storm Control............................................................................................................................................... 912
Conguring Storm Control from INTERFACE Mode........................................................................................... 912
Conguring Storm Control from CONFIGURATION Mode.................................................................................913
53 Spanning Tree Protocol (STP)..................................................................................................................914
Protocol Overview..........................................................................................................................................................914
Congure Spanning Tree............................................................................................................................................... 915
Related Conguration Tasks....................................................................................................................................915
Important Points to Remember....................................................................................................................................915
Conguring Interfaces for Layer 2 Mode.................................................................................................................... 916
Enabling Spanning Tree Protocol Globally....................................................................................................................917
Adding an Interface to the Spanning Tree Group.......................................................................................................919
Modifying Global Parameters........................................................................................................................................919
Modifying Interface STP Parameters..........................................................................................................................920
Enabling PortFast.......................................................................................................................................................... 920
Prevent Network Disruptions with BPDU Guard..................................................................................................921
Selecting STP Root....................................................................................................................................................... 923
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