White Papers

Inuencing Management Unit Selection on a Stack............................................................................................ 912
Managing Redundancy on a Stack.........................................................................................................................912
Resetting a Unit on a Stack.................................................................................................................................... 913
Verify a Stack Conguration......................................................................................................................................... 913
Displaying the Status of Stacking Ports................................................................................................................ 913
Remove Units or Front End Ports from a Stack.........................................................................................................915
Removing a Unit from a Stack................................................................................................................................915
Removing Front End Port Stacking....................................................................................................................... 916
Troubleshoot a Stack..................................................................................................................................................... 916
Recover from Stack Link Flaps...............................................................................................................................916
Recover from a Card Problem State on a Stack...................................................................................................917
50 Storm Control.......................................................................................................................................... 918
Congure Storm Control............................................................................................................................................... 918
Conguring Storm Control from INTERFACE Mode........................................................................................... 918
Conguring Storm Control from CONFIGURATION Mode.................................................................................919
PFC Storm...................................................................................................................................................................... 919
Detect PFC Storm...................................................................................................................................................920
Restore Queue Drop State..................................................................................................................................... 920
View Details of Storm Control PFC.......................................................................................................................920
51 Spanning Tree Protocol (STP)..................................................................................................................922
Protocol Overview.........................................................................................................................................................922
Congure Spanning Tree...............................................................................................................................................923
Related Conguration Tasks................................................................................................................................... 923
Important Points to Remember....................................................................................................................................923
Conguring Interfaces for Layer 2 Mode....................................................................................................................924
Enabling Spanning Tree Protocol Globally...................................................................................................................925
Adding an Interface to the Spanning Tree Group.......................................................................................................927
Modifying Global Parameters....................................................................................................................................... 927
Modifying Interface STP Parameters..........................................................................................................................928
Enabling PortFast.......................................................................................................................................................... 928
Prevent Network Disruptions with BPDU Guard.................................................................................................929
Selecting STP Root........................................................................................................................................................ 931
STP Root Guard..............................................................................................................................................................931
Root Guard Scenario................................................................................................................................................931
Conguring Root Guard..........................................................................................................................................932
Enabling SNMP Traps for Root Elections and Topology Changes...........................................................................933
Conguring Spanning Trees as Hitless........................................................................................................................933
STP Loop Guard.............................................................................................................................................................933
Conguring Loop Guard..........................................................................................................................................935
Displaying STP Guard Conguration........................................................................................................................... 935
52 SupportAssist.......................................................................................................................................... 937
Conguring SupportAssist Using a Conguration Wizard........................................................................................938
Conguring SupportAssist Manually........................................................................................................................... 938
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