Users Guide

Creating a Virtual Stack Unit on a Stack..................................................................................................................685
Displaying Information about a Stack....................................................................................................................... 685
Influencing Management Unit Selection on a Stack............................................................................................... 687
Managing Redundancy on a Stack............................................................................................................................687
Resetting a Unit on a Stack....................................................................................................................................... 687
Verify a Stack Configuration............................................................................................................................................688
Displaying the Status of Stacking Ports...................................................................................................................688
Remove Units or Front End Ports from a Stack...........................................................................................................689
Removing a Unit from a Stack...................................................................................................................................689
Removing Front End Port Stacking..........................................................................................................................690
Troubleshoot a Stack........................................................................................................................................................690
Recover from Stack Link Flaps................................................................................................................................. 690
Recover from a Card Problem State on a Stack..................................................................................................... 691
Chapter 50: Storm Control.......................................................................................................... 692
Configure Storm Control..................................................................................................................................................692
Configuring Storm Control from INTERFACE Mode..............................................................................................692
Configuring Storm Control from CONFIGURATION Mode...................................................................................693
Chapter 51: Spanning Tree Protocol (STP)....................................................................................694
Protocol Overview............................................................................................................................................................ 694
Configure Spanning Tree................................................................................................................................................. 694
Important Points to Remember.......................................................................................................................................695
Configuring Interfaces for Layer 2 Mode.......................................................................................................................695
Enabling Spanning Tree Protocol Globally..................................................................................................................... 696
Adding an Interface to the Spanning Tree Group.........................................................................................................698
Modifying Global Parameters.......................................................................................................................................... 698
Modifying Interface STP Parameters.............................................................................................................................699
Enabling PortFast..............................................................................................................................................................699
Prevent Network Disruptions with BPDU Guard.................................................................................................... 700
Selecting STP Root...........................................................................................................................................................702
STP Root Guard................................................................................................................................................................ 702
Root Guard Scenario...................................................................................................................................................702
Configuring Root Guard..............................................................................................................................................703
Enabling SNMP Traps for Root Elections and Topology Changes............................................................................. 704
Configuring Spanning Trees as Hitless........................................................................................................................... 704
STP Loop Guard................................................................................................................................................................ 704
Configuring Loop Guard............................................................................................................................................. 705
Displaying STP Guard Configuration...............................................................................................................................706
Chapter 52: SupportAssist........................................................................................................... 707
Configuring SupportAssist Using a Configuration Wizard........................................................................................... 708
Configuring SupportAssist Manually...............................................................................................................................708
Configuring SupportAssist Activity.................................................................................................................................709
Configuring SupportAssist Company............................................................................................................................... 711
Configuring SupportAssist Person....................................................................................................................................711
Configuring SupportAssist Server....................................................................................................................................712
Viewing SupportAssist Configuration..............................................................................................................................712
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