Users Guide

Table Of Contents
17 High Availability (HA)................................................................................................................................307
Component Redundancy.............................................................................................................................................. 307
Automatic and Manual Stack Unit Failover...........................................................................................................307
Synchronization between Management and Standby Units..............................................................................308
Forcing a Stack Unit Failover................................................................................................................................. 308
Specifying an Auto-Failover Limit..........................................................................................................................309
Disabling Auto-Reboot............................................................................................................................................ 309
Pre-Conguring a Stack Unit Slot............................................................................................................................... 309
Removing a Provisioned Logical Stack Unit............................................................................................................... 309
Hitless Behavior............................................................................................................................................................. 309
Graceful Restart............................................................................................................................................................. 310
Software Resiliency........................................................................................................................................................310
Software Component Health Monitoring..............................................................................................................310
System Health Monitoring.......................................................................................................................................310
Failure and Event Logging........................................................................................................................................ 311
Hot-Lock Behavior.......................................................................................................................................................... 311
18 Internet Group Management Protocol (IGMP).......................................................................................... 312
IGMP Implementation Information............................................................................................................................... 312
IGMP Protocol Overview...............................................................................................................................................312
IGMP Version 2.........................................................................................................................................................312
IGMP Version 3.........................................................................................................................................................314
Congure IGMP.............................................................................................................................................................. 317
Related Conguration Tasks....................................................................................................................................317
Viewing IGMP Enabled Interfaces................................................................................................................................318
Selecting an IGMP Version............................................................................................................................................318
Viewing IGMP Groups....................................................................................................................................................319
Adjusting Timers............................................................................................................................................................. 319
Adjusting Query and Response Timers..................................................................................................................319
Preventing a Host from Joining a Group.................................................................................................................... 320
Enabling IGMP Immediate-Leave.................................................................................................................................323
IGMP Snooping..............................................................................................................................................................323
IGMP Snooping Implementation Information....................................................................................................... 323
Conguring IGMP Snooping...................................................................................................................................323
Removing a Group-Port Association..................................................................................................................... 324
Disabling Multicast Flooding...................................................................................................................................324
Specifying a Port as Connected to a Multicast Router...................................................................................... 325
Conguring the Switch as Querier........................................................................................................................ 325
Fast Convergence after MSTP Topology Changes...................................................................................................326
Egress Interface Selection (EIS) for HTTP and IGMP Applications........................................................................326
Protocol Separation.................................................................................................................................................326
Enabling and Disabling Management Egress Interface Selection...................................................................... 327
Handling of Management Route Conguration................................................................................................... 328
Handling of Switch-Initiated Trac....................................................................................................................... 329
Handling of Switch-Destined Trac......................................................................................................................329
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