Users Guide

Inuencing Management Unit Selection on a Stack............................................................................................ 751
Managing Redundancy on a Stack.........................................................................................................................751
Resetting a Unit on a Stack.....................................................................................................................................751
Verify a Stack Conguration.........................................................................................................................................752
Displaying the Status of Stacking Ports................................................................................................................752
Remove Units or Front End Ports from a Stack........................................................................................................ 753
Removing a Unit from a Stack............................................................................................................................... 754
Removing Front End Port Stacking.......................................................................................................................754
Troubleshoot a Stack.....................................................................................................................................................755
Recover from Stack Link Flaps.............................................................................................................................. 755
Recover from a Card Problem State on a Stack..................................................................................................755
49 Storm Control.......................................................................................................................................... 757
Congure Storm Control...............................................................................................................................................757
Conguring Storm Control from INTERFACE Mode........................................................................................... 757
Conguring Storm Control from CONFIGURATION Mode................................................................................758
50 Spanning Tree Protocol (STP)................................................................................................................. 759
Protocol Overview......................................................................................................................................................... 759
Congure Spanning Tree...............................................................................................................................................759
Related Conguration Tasks................................................................................................................................... 760
Important Points to Remember....................................................................................................................................760
Conguring Interfaces for Layer 2 Mode.....................................................................................................................761
Enabling Spanning Tree Protocol Globally...................................................................................................................762
Adding an Interface to the Spanning Tree Group.......................................................................................................764
Modifying Global Parameters....................................................................................................................................... 764
Modifying Interface STP Parameters..........................................................................................................................765
Enabling PortFast.......................................................................................................................................................... 765
Prevent Network Disruptions with BPDU Guard.................................................................................................766
Selecting STP Root....................................................................................................................................................... 768
STP Root Guard.............................................................................................................................................................768
Root Guard Scenario............................................................................................................................................... 768
Conguring Root Guard.......................................................................................................................................... 769
Enabling SNMP Traps for Root Elections and Topology Changes...........................................................................770
Conguring Spanning Trees as Hitless........................................................................................................................ 770
STP Loop Guard.............................................................................................................................................................770
Conguring Loop Guard...........................................................................................................................................771
Displaying STP Guard Conguration............................................................................................................................772
51 SupportAssist........................................................................................................................................... 773
Conguring SupportAssist Using a Conguration Wizard.........................................................................................774
Conguring SupportAssist Manually............................................................................................................................774
Conguring SupportAssist Activity..............................................................................................................................776
Conguring SupportAssist Company...........................................................................................................................777
Conguring SupportAssist Person............................................................................................................................... 777
Conguring SupportAssist Server............................................................................................................................... 778
Viewing SupportAssist Conguration..........................................................................................................................779
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