Concept Guide

Recover from a Card Problem State on a Stack..................................................................................................932
50 Storm Control..........................................................................................................................................933
Congure Storm Control...............................................................................................................................................933
Conguring Storm Control from INTERFACE Mode...........................................................................................933
Conguring Storm Control from CONFIGURATION Mode................................................................................934
Detect PFC Storm.........................................................................................................................................................934
Restore Queue Drop State........................................................................................................................................... 935
PFC Storm......................................................................................................................................................................935
View Details of Storm Control PFC.............................................................................................................................935
51 Spanning Tree Protocol (STP).................................................................................................................. 937
Protocol Overview......................................................................................................................................................... 937
Congure Spanning Tree...............................................................................................................................................938
Related Conguration Tasks...................................................................................................................................938
Important Points to Remember................................................................................................................................... 938
Conguring Interfaces for Layer 2 Mode....................................................................................................................939
Enabling Spanning Tree Protocol Globally.................................................................................................................. 940
Adding an Interface to the Spanning Tree Group...................................................................................................... 942
Modifying Global Parameters....................................................................................................................................... 942
Modifying Interface STP Parameters..........................................................................................................................943
Enabling PortFast.......................................................................................................................................................... 943
Prevent Network Disruptions with BPDU Guard.................................................................................................944
Selecting STP Root....................................................................................................................................................... 946
STP Root Guard.............................................................................................................................................................946
Root Guard Scenario...............................................................................................................................................946
Conguring Root Guard.......................................................................................................................................... 947
Enabling SNMP Traps for Root Elections and Topology Changes...........................................................................948
Conguring Spanning Trees as Hitless........................................................................................................................948
STP Loop Guard.............................................................................................................................................................948
Conguring Loop Guard..........................................................................................................................................950
Displaying STP Guard Conguration........................................................................................................................... 950
52 SupportAssist..........................................................................................................................................952
Conguring SupportAssist Using a Conguration Wizard........................................................................................953
Conguring SupportAssist Manually...........................................................................................................................953
Conguring SupportAssist Activity............................................................................................................................. 955
Conguring SupportAssist Company..........................................................................................................................956
Conguring SupportAssist Person...............................................................................................................................957
Conguring SupportAssist Server............................................................................................................................... 957
Viewing SupportAssist Conguration......................................................................................................................... 958
53 System Time and Date.............................................................................................................................960
Network Time Protocol.................................................................................................................................................960
Protocol Overview....................................................................................................................................................961
Congure the Network Time Protocol...................................................................................................................961
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