Service Manual

Table Of Contents
High Availability on Stacks..........................................................................................................942
Management Access on Stacks..................................................................................................943
Important Points to Remember.......................................................................................................944
Stacking Installation Tasks................................................................................................................944
Create an Stack...........................................................................................................................944
Add Units to an Existing Stack....................................................................................................949
Split a Stack..................................................................................................................................951
Stacking Configuration Tasks...........................................................................................................952
Assigning Unit Numbers to Units in an Stack............................................................................ 952
Creating a Virtual Stack Unit on a Stack.....................................................................................952
Displaying Information about a Stack........................................................................................ 952
Influencing Management Unit Selection on a Stack................................................................. 955
Managing Redundancy on a Stack.............................................................................................955
Resetting a Unit on a Stack.........................................................................................................956
Verify a Stack Configuration.............................................................................................................956
Displaying the Status of Stacking Ports......................................................................................956
Remove Units or Front End Ports from a Stack...............................................................................958
Removing a Unit from a Stack....................................................................................................958
Removing Front End Port Stacking............................................................................................ 959
Troubleshoot a Stack........................................................................................................................959
Recover from Stack Link Flaps................................................................................................... 959
Recover from a Card Problem State on a Stack........................................................................960
53 Storm Control.................................................................................................962
Configure Storm Control................................................................................................................. 962
Configuring Storm Control from INTERFACE Mode.................................................................962
Configuring Storm Control from CONFIGURATION Mode......................................................963
54 Spanning Tree Protocol (STP)..................................................................... 964
Protocol Overview............................................................................................................................964
Configure Spanning Tree................................................................................................................. 964
Related Configuration Tasks...................................................................................................... 964
Important Points to Remember....................................................................................................... 965
Configuring Interfaces for Layer 2 Mode.........................................................................................965
Enabling Spanning Tree Protocol Globally......................................................................................966
Adding an Interface to the Spanning Tree Group...........................................................................968
Modifying Global Parameters...........................................................................................................969
Modifying Interface STP Parameters................................................................................................970
Enabling PortFast.............................................................................................................................. 970
Prevent Network Disruptions with BPDU Guard........................................................................971
Selecting STP Root............................................................................................................................973
STP Root Guard.................................................................................................................................974
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