Users Guide

Stack Management Roles.......................................................................................................................................... 746
Stack Master Election.................................................................................................................................................747
Virtual IP........................................................................................................................................................................748
Failover Roles............................................................................................................................................................... 749
MAC Addressing on Stacks........................................................................................................................................749
Stacking LAG............................................................................................................................................................... 750
Supported Stacking Topologies.................................................................................................................................750
High Availability on Stacks..........................................................................................................................................750
Management Access on Stacks.................................................................................................................................751
Mixed-mode Stacking.................................................................................................................................................752
Important Points to Remember.......................................................................................................................................753
Stacking Installation Tasks............................................................................................................................................... 753
Create a Stack............................................................................................................................................................. 753
Add Units to an Existing Stack...................................................................................................................................757
Split a Stack................................................................................................................................................................. 759
Stacking Configuration Tasks..........................................................................................................................................759
Assigning Unit Numbers to Units in an Stack.......................................................................................................... 759
Creating a Virtual Stack Unit on a Stack..................................................................................................................760
Displaying Information about a Stack....................................................................................................................... 760
Influencing Management Unit Selection on a Stack............................................................................................... 762
Managing Redundancy on a Stack............................................................................................................................763
Resetting a Unit on a Stack....................................................................................................................................... 763
Enabling Mixed-mode Stacking................................................................................................................................. 763
Verify a Stack Configuration............................................................................................................................................764
Displaying the Status of Stacking Ports................................................................................................................... 764
Remove Units or Front End Ports from a Stack........................................................................................................... 765
Removing a Unit from a Stack...................................................................................................................................765
Removing Front End Port Stacking.......................................................................................................................... 766
Troubleshoot a Stack........................................................................................................................................................766
Recover from Stack Link Flaps..................................................................................................................................767
Recover from a Card Problem State on a Stack.....................................................................................................767
Chapter 52: Storm Control...........................................................................................................769
Configure Storm Control..................................................................................................................................................769
Configuring Storm Control from INTERFACE Mode..............................................................................................769
Configuring Storm Control from CONFIGURATION Mode................................................................................... 770
Chapter 53: Spanning Tree Protocol (STP).................................................................................... 771
Protocol Overview............................................................................................................................................................. 771
Configure Spanning Tree...................................................................................................................................................771
Important Points to Remember....................................................................................................................................... 772
Configuring Interfaces for Layer 2 Mode....................................................................................................................... 772
Enabling Spanning Tree Protocol Globally......................................................................................................................773
Adding an Interface to the Spanning Tree Group......................................................................................................... 775
Modifying Global Parameters...........................................................................................................................................775
Modifying Interface STP Parameters............................................................................................................................. 776
Enabling PortFast.............................................................................................................................................................. 777
Prevent Network Disruptions with BPDU Guard.....................................................................................................777
Selecting STP Root........................................................................................................................................................... 779
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