Users Guide

54 Storm Control.......................................................................................................................................... 815
Congure Storm Control............................................................................................................................................... 815
Conguring Storm Control from INTERFACE Mode........................................................................................... 815
Conguring Storm Control from CONFIGURATION Mode.................................................................................816
55 Broadcast Storm Control..........................................................................................................................817
Supported Modes...........................................................................................................................................................817
Disabling Broadcast Storm Control.............................................................................................................................. 817
Displaying Broadcast-Storm Control Status................................................................................................................817
Conguring Storm Control............................................................................................................................................ 817
56 Spanning Tree Protocol (STP)..................................................................................................................818
Protocol Overview..........................................................................................................................................................818
Congure Spanning Tree............................................................................................................................................... 818
Related Conguration Tasks....................................................................................................................................819
Important Points to Remember.............................................................................................................................. 819
Conguring Interfaces for Layer 2 Mode....................................................................................................................820
Enabling Spanning Tree Protocol Globally................................................................................................................... 821
Adding an Interface to the Spanning Tree Group...................................................................................................... 823
Removing an Interface from the Spanning Tree Group............................................................................................ 823
Modifying Global Parameters....................................................................................................................................... 823
Modifying Interface STP Parameters.......................................................................................................................... 824
Enabling Port Fast......................................................................................................................................................... 824
Prevent Network Disruptions with BPDU Guard.................................................................................................825
Global BPDU Filtering....................................................................................................................................................827
Interface BPDU Filtering......................................................................................................................................... 827
Selecting STP Root....................................................................................................................................................... 828
STP Root Guard.............................................................................................................................................................829
Root Guard Scenario...............................................................................................................................................829
Conguring Root Guard..........................................................................................................................................830
SNMP Traps for Root Elections and Topology Changes........................................................................................... 831
Displaying STP Guard Conguration............................................................................................................................ 831
57 SupportAssist.......................................................................................................................................... 832
Conguring SupportAssist Using a Conguration Wizard........................................................................................ 833
Conguring SupportAssist Manually........................................................................................................................... 833
Conguring SupportAssist Activity............................................................................................................................. 835
Conguring SupportAssist Company..........................................................................................................................836
Conguring SupportAssist Person...............................................................................................................................837
Conguring SupportAssist Server............................................................................................................................... 837
Viewing SupportAssist Conguration..........................................................................................................................838
58 System Time and Date.............................................................................................................................840
Network Time Protocol.................................................................................................................................................840
Protocol Overview....................................................................................................................................................841
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