Setup Guide

Recover from a Card Problem State on a Stack.................................................................................................1016
55 Storm Control.........................................................................................................................................1018
Congure Storm Control..............................................................................................................................................1018
Conguring Storm Control from INTERFACE Mode..........................................................................................1018
Conguring Storm Control from CONFIGURATION Mode............................................................................... 1019
56 Spanning Tree Protocol (STP)................................................................................................................1020
Protocol Overview....................................................................................................................................................... 1020
Congure Spanning Tree..............................................................................................................................................1021
Related Conguration Tasks.................................................................................................................................. 1021
Important Points to Remember...................................................................................................................................1021
Conguring Interfaces for Layer 2 Mode.................................................................................................................. 1022
Enabling Spanning Tree Protocol Globally................................................................................................................. 1023
Adding an Interface to the Spanning Tree Group.....................................................................................................1025
Modifying Global Parameters......................................................................................................................................1025
Modifying Interface STP Parameters........................................................................................................................ 1026
Enabling PortFast.........................................................................................................................................................1026
Prevent Network Disruptions with BPDU Guard................................................................................................1027
Selecting STP Root......................................................................................................................................................1029
STP Root Guard........................................................................................................................................................... 1029
Root Guard Scenario............................................................................................................................................. 1029
Conguring Root Guard........................................................................................................................................ 1030
Enabling SNMP Traps for Root Elections and Topology Changes..........................................................................1031
Conguring Spanning Trees as Hitless....................................................................................................................... 1031
STP Loop Guard............................................................................................................................................................1031
Conguring Loop Guard........................................................................................................................................ 1033
Displaying STP Guard Conguration..........................................................................................................................1033
57 SupportAssist.........................................................................................................................................1035
Conguring SupportAssist Using a Conguration Wizard...................................................................................... 1036
Conguring SupportAssist Manually..........................................................................................................................1036
Conguring SupportAssist Activity............................................................................................................................1038
Conguring SupportAssist Company........................................................................................................................ 1039
Conguring SupportAssist Person.............................................................................................................................1040
Conguring SupportAssist Server............................................................................................................................. 1040
Viewing SupportAssist Conguration.........................................................................................................................1041
58 System Time and Date........................................................................................................................... 1043
Network Time Protocol............................................................................................................................................... 1043
Protocol Overview................................................................................................................................................. 1044
Congure the Network Time Protocol................................................................................................................ 1044
Enabling NTP..........................................................................................................................................................1045
Conguring NTP Broadcasts................................................................................................................................1045
Disabling NTP on an Interface..............................................................................................................................1046
Conguring a Source IP Address for NTP Packets........................................................................................... 1046
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