Connectivity Guide

Table Of Contents
MAC Addressing on Stacks.................................................................................................................................... 888
Stacking LAG............................................................................................................................................................. 889
Supported Stacking Topologies.............................................................................................................................889
High Availability on Stacks......................................................................................................................................890
Management Access on Stacks............................................................................................................................ 890
Mixed-mode Stacking............................................................................................................................................... 891
Important Points to Remember...................................................................................................................................892
Stacking Installation Tasks........................................................................................................................................... 892
Create a Stack........................................................................................................................................................... 893
Add Units to an Existing Stack.............................................................................................................................. 896
Split a Stack............................................................................................................................................................... 899
Stacking Configuration Tasks...................................................................................................................................... 899
Assigning Unit Numbers to Units in an Stack.................................................................................................... 899
Creating a Virtual Stack Unit on a Stack............................................................................................................ 899
Displaying Information about a Stack...................................................................................................................899
Influencing Management Unit Selection on a Stack.........................................................................................902
Managing Redundancy on a Stack........................................................................................................................902
Resetting a Unit on a Stack....................................................................................................................................903
Enabling Mixed-mode Stacking............................................................................................................................. 903
Verify a Stack Configuration........................................................................................................................................903
Displaying the Status of Stacking Ports..............................................................................................................904
Remove Units or Front End Ports from a Stack.....................................................................................................905
Removing a Unit from a Stack...............................................................................................................................905
Removing Front End Port Stacking......................................................................................................................906
Troubleshoot a Stack.....................................................................................................................................................906
Recover from Stack Link Flaps..............................................................................................................................906
Recover from a Card Problem State on a Stack...............................................................................................907
Chapter 54: Storm Control........................................................................................................ 908
Configure Storm Control...............................................................................................................................................908
Configuring Storm Control from INTERFACE Mode........................................................................................908
Configuring Storm Control from CONFIGURATION Mode............................................................................ 909
Chapter 55: Spanning Tree Protocol (STP)................................................................................910
Protocol Overview...........................................................................................................................................................910
Configure Spanning Tree............................................................................................................................................... 910
Important Points to Remember.................................................................................................................................... 911
Configuring Interfaces for Layer 2 Mode.................................................................................................................. 912
Enabling Spanning Tree Protocol Globally................................................................................................................. 913
Adding an Interface to the Spanning Tree Group....................................................................................................914
Modifying Global Parameters....................................................................................................................................... 915
Modifying Interface STP Parameters......................................................................................................................... 916
Enabling PortFast............................................................................................................................................................ 916
Prevent Network Disruptions with BPDU Guard............................................................................................... 917
Selecting STP Root.........................................................................................................................................................919
STP Root Guard...............................................................................................................................................................919
Root Guard Scenario.................................................................................................................................................919
Configuring Root Guard.......................................................................................................................................... 920
Enabling SNMP Traps for Root Elections and Topology Changes...................................................................... 921
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