Users Guide

Stacking LAG........................................................................................................................................................... 800
Supported Stacking Topologies.............................................................................................................................800
High Availability on Stacks...................................................................................................................................... 801
Management Access on Stacks............................................................................................................................ 802
Important Points to Remember...................................................................................................................................802
Stacking Installation Tasks........................................................................................................................................... 803
Create a Stack......................................................................................................................................................... 803
Add Units to an Existing Stack.............................................................................................................................. 807
Split a Stack............................................................................................................................................................. 809
Stacking Configuration Tasks.......................................................................................................................................810
Assigning Unit Numbers to Units in an Stack.......................................................................................................810
Creating a Virtual Stack Unit on a Stack...............................................................................................................810
Displaying Information about a Stack.................................................................................................................... 810
Influencing Management Unit Selection on a Stack............................................................................................812
Managing Redundancy on a Stack.........................................................................................................................813
Resetting a Unit on a Stack.................................................................................................................................... 813
Verify a Stack Configuration.........................................................................................................................................813
Displaying the Status of Stacking Ports................................................................................................................814
Remove Units or Front End Ports from a Stack........................................................................................................815
Removing a Unit from a Stack............................................................................................................................... 815
Removing Front End Port Stacking.......................................................................................................................816
Troubleshoot a Stack.....................................................................................................................................................816
Recover from Stack Link Flaps...............................................................................................................................816
Recover from a Card Problem State on a Stack..................................................................................................817
49 Storm Control.......................................................................................................................................... 819
Configure Storm Control...............................................................................................................................................819
Configuring Storm Control from INTERFACE Mode...........................................................................................819
Configuring Storm Control from CONFIGURATION Mode............................................................................... 820
50 Spanning Tree Protocol (STP).................................................................................................................821
Protocol Overview......................................................................................................................................................... 821
Configure Spanning Tree..............................................................................................................................................822
Related Configuration Tasks.................................................................................................................................. 822
Important Points to Remember................................................................................................................................... 822
Configuring Interfaces for Layer 2 Mode................................................................................................................... 823
Enabling Spanning Tree Protocol Globally..................................................................................................................824
Adding an Interface to the Spanning Tree Group..................................................................................................... 826
Modifying Global Parameters.......................................................................................................................................826
Modifying Interface STP Parameters..........................................................................................................................827
Enabling PortFast.......................................................................................................................................................... 827
Prevent Network Disruptions with BPDU Guard................................................................................................ 828
Selecting STP Root.......................................................................................................................................................830
STP Root Guard............................................................................................................................................................ 830
Root Guard Scenario...............................................................................................................................................830
Configuring Root Guard...........................................................................................................................................831
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