Users Guide

Verify a Stack Conguration.........................................................................................................................................828
Displaying the Status of Stacking Ports................................................................................................................828
Remove Units or Front End Ports from a Stack........................................................................................................830
Removing a Unit from a Stack...............................................................................................................................830
Removing Front End Port Stacking........................................................................................................................831
Troubleshoot a Stack......................................................................................................................................................831
Recover from Stack Link Flaps............................................................................................................................... 831
Recover from a Card Problem State on a Stack..................................................................................................832
Recover from a Card Mismatch State on a Stack...............................................................................................832
52 Storm Control.......................................................................................................................................... 834
Congure Storm Control...............................................................................................................................................834
Conguring Storm Control from INTERFACE Mode...........................................................................................834
Conguring Storm Control from CONFIGURATION Mode................................................................................835
53 Spanning Tree Protocol (STP)................................................................................................................. 836
Protocol Overview.........................................................................................................................................................836
Congure Spanning Tree.............................................................................................................................................. 836
Related Conguration Tasks................................................................................................................................... 837
Important Points to Remember....................................................................................................................................837
Conguring Interfaces for Layer 2 Mode....................................................................................................................838
Enabling Spanning Tree Protocol Globally...................................................................................................................839
Adding an Interface to the Spanning Tree Group....................................................................................................... 841
Modifying Global Parameters........................................................................................................................................841
Modifying Interface STP Parameters..........................................................................................................................842
Enabling PortFast.......................................................................................................................................................... 843
Prevent Network Disruptions with BPDU Guard.................................................................................................844
Selecting STP Root....................................................................................................................................................... 846
STP Root Guard.............................................................................................................................................................846
Root Guard Scenario............................................................................................................................................... 846
Conguring Root Guard.......................................................................................................................................... 847
Enabling SNMP Traps for Root Elections and Topology Changes...........................................................................848
Conguring Spanning Trees as Hitless........................................................................................................................848
STP Loop Guard.............................................................................................................................................................848
Conguring Loop Guard..........................................................................................................................................849
Displaying STP Guard Conguration........................................................................................................................... 850
54 SupportAssist...........................................................................................................................................851
Conguring SupportAssist Using a Conguration Wizard........................................................................................852
Conguring SupportAssist Manually........................................................................................................................... 852
Conguring SupportAssist Activity............................................................................................................................. 854
Conguring SupportAssist Company..........................................................................................................................855
Conguring SupportAssist Person.............................................................................................................................. 855
Conguring SupportAssist Server...............................................................................................................................856
Viewing SupportAssist Conguration..........................................................................................................................857
55 System Time and Date.............................................................................................................................859
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