Users Guide

Creating a Virtual Stack Unit on a Stack......................................................................942
Displaying Information about a Stack..........................................................................942
Influencing Management Unit Selection on a Stack................................................ 946
Managing Redundancy on a Stack............................................................................... 947
Resetting a Unit on a Stack............................................................................................ 947
Verify a Stack Configuration................................................................................................948
Displaying the Status of Stacking Ports.......................................................................948
Removing a Unit from a Stack............................................................................................ 949
Troubleshoot a Stack.............................................................................................................951
Recover from Stack Link Flaps.......................................................................................951
Recover from a Card Problem State on a Stack........................................................952
52 Storm Control.....................................................................................................................954
Configure Storm Control..................................................................................................... 954
Configuring Storm Control from INTERFACE Mode................................................954
Configuring Storm Control from CONFIGURATION Mode....................................955
53 Spanning Tree Protocol (STP)..........................................................................................956
Protocol Overview.................................................................................................................956
Configure Spanning Tree......................................................................................................957
Related Configuration Tasks.......................................................................................... 957
Important Points to Remember.......................................................................................... 957
Configuring Interfaces for Layer 2 Mode..........................................................................958
Enabling Spanning Tree Protocol Globally.......................................................................959
Adding an Interface to the Spanning Tree Group...........................................................962
Modifying Global Parameters..............................................................................................962
Modifying Interface STP Parameters..................................................................................963
Enabling PortFast................................................................................................................... 964
Prevent Network Disruptions with BPDU Guard.......................................................964
Selecting STP Root................................................................................................................ 966
STP Root Guard......................................................................................................................966
Root Guard Scenario....................................................................................................... 967
Configuring Root Guard.................................................................................................968
Enabling SNMP Traps for Root Elections and Topology Changes..............................969
Configuring Spanning Trees as Hitless..............................................................................969
STP Loop Guard..................................................................................................................... 970
Configuring Loop Guard................................................................................................. 971
Displaying STP Guard Configuration................................................................................. 972
54 SupportAssist......................................................................................................................974
Configuring SupportAssist Using a Configuration Wizard.............................................975
Configuring SupportAssist Manually.................................................................................. 975
9.10(0.0)
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