Concept Guide

17 High Availability (HA)............................................................................................................................... 306
Component Redundancy..............................................................................................................................................306
Automatic and Manual Stack Unit Failover.......................................................................................................... 306
Synchronization between Management and Standby Units.............................................................................. 307
Forcing a Stack Unit Failover..................................................................................................................................307
Disabling Auto-Reboot............................................................................................................................................ 308
Pre-Conguring a Stack Unit Slot............................................................................................................................... 308
Removing a Provisioned Logical Stack Unit............................................................................................................... 308
Hitless Behavior............................................................................................................................................................. 309
Graceful Restart............................................................................................................................................................ 309
Software Resiliency.......................................................................................................................................................309
Software Component Health Monitoring............................................................................................................. 309
System Health Monitoring.......................................................................................................................................310
Failure and Event Logging....................................................................................................................................... 310
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
Handling of Transit Trac (Trac Separation).................................................................................................... 330
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