Setup Guide

Remove Units or Front End Ports from a Stack........................................................................................................906
Removing a Unit from a Stack...............................................................................................................................906
Removing Front End Port Stacking.......................................................................................................................907
Troubleshoot a Stack.....................................................................................................................................................907
Recover from Stack Link Flaps..............................................................................................................................908
Recover from a Card Problem State on a Stack................................................................................................. 908
50 Storm Control.......................................................................................................................................... 910
Congure Storm Control............................................................................................................................................... 910
Conguring Storm Control from INTERFACE Mode........................................................................................... 910
Conguring Storm Control from CONFIGURATION Mode................................................................................. 911
51 Spanning Tree Protocol (STP)...................................................................................................................912
Protocol Overview..........................................................................................................................................................912
Congure Spanning Tree............................................................................................................................................... 913
Related Conguration Tasks....................................................................................................................................913
Important Points to Remember.................................................................................................................................... 913
Conguring Interfaces for Layer 2 Mode.................................................................................................................... 914
Enabling Spanning Tree Protocol Globally................................................................................................................... 915
Adding an Interface to the Spanning Tree Group....................................................................................................... 917
Modifying Global Parameters........................................................................................................................................917
Modifying Interface STP Parameters...........................................................................................................................918
Enabling PortFast........................................................................................................................................................... 918
Prevent Network Disruptions with BPDU Guard................................................................................................. 919
Selecting STP Root........................................................................................................................................................921
STP Root Guard..............................................................................................................................................................921
Root Guard Scenario................................................................................................................................................921
Conguring Root Guard..........................................................................................................................................922
Enabling SNMP Traps for Root Elections and Topology Changes...........................................................................923
Conguring Spanning Trees as Hitless........................................................................................................................923
STP Loop Guard.............................................................................................................................................................923
Conguring Loop Guard..........................................................................................................................................925
Displaying STP Guard Conguration........................................................................................................................... 925
52 SupportAssist.......................................................................................................................................... 927
Conguring SupportAssist Using a Conguration Wizard........................................................................................928
Conguring SupportAssist Manually........................................................................................................................... 928
Conguring SupportAssist Activity............................................................................................................................. 930
Conguring SupportAssist Company...........................................................................................................................931
Conguring SupportAssist Person.............................................................................................................................. 932
Conguring SupportAssist Server...............................................................................................................................932
Viewing SupportAssist Conguration..........................................................................................................................933
53 System Time and Date.............................................................................................................................935
Network Time Protocol.................................................................................................................................................935
Protocol Overview...................................................................................................................................................936
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