Administrator Guide

Troubleshooting a Switch Stack...................................................................................................................................773
Failure Scenarios.......................................................................................................................................................774
Upgrading a Switch Stack.............................................................................................................................................776
Upgrading a Single Stack Unit...................................................................................................................................... 777
54 Storm Control.......................................................................................................................................... 778
Congure Storm Control...............................................................................................................................................778
Conguring Storm Control from INTERFACE Mode........................................................................................... 778
Conguring Storm Control from CONFIGURATION Mode................................................................................ 779
55 Broadcast Storm Control......................................................................................................................... 780
Supported Modes..........................................................................................................................................................780
Disabling Broadcast Storm Control..............................................................................................................................780
Displaying Broadcast-Storm Control Status...............................................................................................................780
Conguring Storm Control............................................................................................................................................780
56 Spanning Tree Protocol (STP).................................................................................................................. 781
Protocol Overview.......................................................................................................................................................... 781
Congure Spanning Tree................................................................................................................................................781
Related Conguration Tasks................................................................................................................................... 782
Important Points to Remember..............................................................................................................................782
Conguring Interfaces for Layer 2 Mode....................................................................................................................783
Enabling Spanning Tree Protocol Globally...................................................................................................................784
Adding an Interface to the Spanning Tree Group...................................................................................................... 786
Removing an Interface from the Spanning Tree Group.............................................................................................786
Modifying Global Parameters....................................................................................................................................... 786
Modifying Interface STP Parameters.......................................................................................................................... 787
Enabling Port Fast..........................................................................................................................................................787
Prevent Network Disruptions with BPDU Guard.................................................................................................788
Global BPDU Filtering....................................................................................................................................................790
Interface BPDU Filtering.........................................................................................................................................790
Selecting STP Root........................................................................................................................................................ 791
STP Root Guard.............................................................................................................................................................792
Root Guard Scenario............................................................................................................................................... 792
Conguring Root Guard.......................................................................................................................................... 793
SNMP Traps for Root Elections and Topology Changes...........................................................................................794
Displaying STP Guard Conguration........................................................................................................................... 794
57 SupportAssist.......................................................................................................................................... 795
Conguring SupportAssist Using a Conguration Wizard........................................................................................ 796
Conguring SupportAssist Manually........................................................................................................................... 796
Conguring SupportAssist Activity..............................................................................................................................798
Conguring SupportAssist Company..........................................................................................................................799
Conguring SupportAssist Person.............................................................................................................................. 800
Conguring SupportAssist Server...............................................................................................................................800
Viewing SupportAssist Conguration.......................................................................................................................... 801
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