Administrator Guide

Monitor Port-Channels................................................................................................................................................. 796
Enabling an SNMP Agent to Notify Syslog Server Failure........................................................................................797
Troubleshooting SNMP Operation...............................................................................................................................798
Transceiver Monitoring..................................................................................................................................................798
48 Stacking.................................................................................................................................................. 800
Stacking Overview........................................................................................................................................................ 800
Stack Management Roles...................................................................................................................................... 800
Stack Master Election..............................................................................................................................................801
Virtual IP.................................................................................................................................................................... 801
Failover Roles............................................................................................................................................................801
MAC Addressing on Stacks....................................................................................................................................802
Stacking LAG........................................................................................................................................................... 803
Supported Stacking Topologies............................................................................................................................. 803
High Availability on Stacks......................................................................................................................................804
Management Access on Stacks............................................................................................................................ 805
Important Points to Remember................................................................................................................................... 805
Stacking Installation Tasks............................................................................................................................................806
Create a Stack......................................................................................................................................................... 806
Add Units to an Existing Stack............................................................................................................................... 810
Split a Stack.............................................................................................................................................................. 812
Stacking Conguration Tasks........................................................................................................................................813
Assigning Unit Numbers to Units in an Stack....................................................................................................... 813
Creating a Virtual Stack Unit on a Stack............................................................................................................... 813
Displaying Information about a Stack.....................................................................................................................814
Inuencing Management Unit Selection on a Stack............................................................................................815
Managing Redundancy on a Stack.........................................................................................................................816
Resetting a Unit on a Stack.................................................................................................................................... 816
Verify a Stack Conguration..........................................................................................................................................817
Displaying the Status of Stacking Ports.................................................................................................................817
Remove Units or Front End Ports from a Stack.........................................................................................................818
Removing a Unit from a Stack................................................................................................................................818
Removing Front End Port Stacking........................................................................................................................819
Troubleshoot a Stack..................................................................................................................................................... 819
Recover from Stack Link Flaps.............................................................................................................................. 820
Recover from a Card Problem State on a Stack..................................................................................................820
49 Storm Control.......................................................................................................................................... 822
Congure Storm Control...............................................................................................................................................822
Conguring Storm Control from INTERFACE Mode...........................................................................................822
Conguring Storm Control from CONFIGURATION Mode................................................................................ 823
50 Spanning Tree Protocol (STP)................................................................................................................. 824
Protocol Overview......................................................................................................................................................... 824
Congure Spanning Tree...............................................................................................................................................825
Related Conguration Tasks...................................................................................................................................825
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