Administrator Guide
Virtual IP........................................................................................................................................................................797
Failover Roles............................................................................................................................................................... 798
MAC Addressing on Stacks........................................................................................................................................798
Stacking LAG............................................................................................................................................................... 800
Supported Stacking Topologies................................................................................................................................. 801
High Availability on Stacks.......................................................................................................................................... 801
Management Access on Stacks................................................................................................................................802
Important Points to Remember.......................................................................................................................................803
Stacking Installation Tasks...............................................................................................................................................803
Create a Stack.............................................................................................................................................................803
Add Units to an Existing Stack..................................................................................................................................805
Split a Stack................................................................................................................................................................. 808
Stacking Configuration Tasks..........................................................................................................................................808
Assigning Unit Numbers to Units in an Stack..........................................................................................................808
Creating a Virtual Stack Unit on a Stack..................................................................................................................809
Displaying Information about a Stack....................................................................................................................... 809
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....................................................................................................................813
Removing a Unit from a Stack......................................................................................................................................... 815
Troubleshoot a Stack........................................................................................................................................................ 816
Recover from Stack Link Flaps.................................................................................................................................. 816
Recover from a Card Problem State on a Stack......................................................................................................817
53 Storm Control.........................................................................................................................818
Configure Storm Control...................................................................................................................................................818
Configuring Storm Control from INTERFACE Mode...............................................................................................818
Configuring Storm Control from CONFIGURATION Mode....................................................................................819
54 Spanning Tree Protocol (STP)................................................................................................. 820
Protocol Overview............................................................................................................................................................ 820
Configure Spanning Tree................................................................................................................................................. 820
Important Points to Remember........................................................................................................................................821
Configuring Interfaces for Layer 2 Mode........................................................................................................................821
Enabling Spanning Tree Protocol Globally......................................................................................................................822
Adding an Interface to the Spanning Tree Group.........................................................................................................824
Modifying Global Parameters...........................................................................................................................................824
Modifying Interface STP Parameters.............................................................................................................................825
Enabling PortFast..............................................................................................................................................................825
Prevent Network Disruptions with BPDU Guard.................................................................................................... 826
Selecting STP Root...........................................................................................................................................................827
STP Root Guard................................................................................................................................................................ 828
Root Guard Scenario...................................................................................................................................................828
Configuring Root Guard..............................................................................................................................................828
Enabling SNMP Traps for Root Elections and Topology Changes............................................................................. 829
Configuring Spanning Trees as Hitless...........................................................................................................................829
STP Loop Guard................................................................................................................................................................830
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