Administrator Guide

Managing Redundancy on a Stack.........................................................................................................................918
Resetting a Unit on a Stack.................................................................................................................................... 918
Verify a Stack Conguration......................................................................................................................................... 918
Displaying the Status of Stacking Ports................................................................................................................ 919
Remove Units or Front End Ports from a Stack........................................................................................................920
Removing a Unit from a Stack............................................................................................................................... 920
Removing Front End Port Stacking........................................................................................................................921
Troubleshoot a Stack......................................................................................................................................................921
Recover from Stack Link Flaps.............................................................................................................................. 922
Recover from a Card Problem State on a Stack..................................................................................................922
53 Storm Control.......................................................................................................................................... 924
Congure Storm Control...............................................................................................................................................924
Conguring Storm Control from INTERFACE Mode...........................................................................................924
Conguring Storm Control from CONFIGURATION Mode................................................................................925
54 Spanning Tree Protocol (STP)................................................................................................................. 926
Protocol Overview.........................................................................................................................................................926
Congure Spanning Tree...............................................................................................................................................927
Related Conguration Tasks................................................................................................................................... 927
Important Points to Remember....................................................................................................................................927
Conguring Interfaces for Layer 2 Mode....................................................................................................................928
Enabling Spanning Tree Protocol Globally...................................................................................................................929
Adding an Interface to the Spanning Tree Group....................................................................................................... 931
Modifying Global Parameters........................................................................................................................................931
Modifying Interface STP Parameters..........................................................................................................................932
Enabling PortFast.......................................................................................................................................................... 932
Prevent Network Disruptions with BPDU Guard.................................................................................................933
Selecting STP Root....................................................................................................................................................... 935
STP Root Guard.............................................................................................................................................................935
Root Guard Scenario...............................................................................................................................................935
Conguring Root Guard..........................................................................................................................................936
Enabling SNMP Traps for Root Elections and Topology Changes...........................................................................937
Conguring Spanning Trees as Hitless........................................................................................................................ 937
STP Loop Guard.............................................................................................................................................................937
Conguring Loop Guard..........................................................................................................................................939
Displaying STP Guard Conguration........................................................................................................................... 939
55 SupportAssist.......................................................................................................................................... 941
Conguring SupportAssist Using a Conguration Wizard........................................................................................942
Conguring SupportAssist Manually........................................................................................................................... 942
Conguring SupportAssist Activity............................................................................................................................. 944
Conguring SupportAssist Company..........................................................................................................................945
Conguring SupportAssist Person.............................................................................................................................. 946
Conguring SupportAssist Server...............................................................................................................................946
Viewing SupportAssist Conguration..........................................................................................................................947
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