Concept Guide

Protocol Overview.........................................................................................................................................................594
Spanning Tree Variations.............................................................................................................................................. 595
Implementation Information................................................................................................................................... 595
Congure Multiple Spanning Tree Protocol................................................................................................................595
Related Conguration Tasks...................................................................................................................................596
Enable Multiple Spanning Tree Globally...................................................................................................................... 596
Adding and Removing Interfaces.................................................................................................................................596
Creating Multiple Spanning Tree Instances................................................................................................................ 597
Inuencing MSTP Root Selection................................................................................................................................598
Interoperate with Non-Dell Bridges.............................................................................................................................599
Changing the Region Name or Revision..................................................................................................................... 599
Modifying Global Parameters.......................................................................................................................................599
Modifying the Interface Parameters............................................................................................................................ 601
Setting STP path cost as constant............................................................................................................................. 602
Conguring an EdgePort.............................................................................................................................................. 602
Flush MAC Addresses after a Topology Change....................................................................................................... 603
MSTP Sample Congurations......................................................................................................................................603
Router 1 Running-CongurationRouter 2 Running-CongurationRouter 3 Running-
CongurationSFTOS Example Running-Conguration
.......................................................................................603
Debugging and Verifying MSTP Congurations........................................................................................................ 607
31 Multicast Features.................................................................................................................................... 610
Enabling IP Multicast..................................................................................................................................................... 610
Implementation Information.......................................................................................................................................... 610
Multicast Policies.............................................................................................................................................................611
IPv4 Multicast Policies..............................................................................................................................................611
Understanding Multicast Traceroute (mtrace)........................................................................................................... 618
Important Points to Remember..............................................................................................................................619
Printing Multicast Traceroute (mtrace) Paths............................................................................................................ 619
Supported Error Codes.................................................................................................................................................620
mtrace Scenarios............................................................................................................................................................621
33 Multicast Listener Discovery Protocol......................................................................................................627
MLD Version 1.................................................................................................................................................................627
MLD Querier Router...................................................................................................................................................... 627
Joining a Multicast Group.............................................................................................................................................628
Leaving a Multicast Group............................................................................................................................................628
MLD version 2................................................................................................................................................................628
MLD timers.....................................................................................................................................................................630
Reducing Host Response Burstiness..................................................................................................................... 631
Clearing MLD groups..................................................................................................................................................... 631
Debugging MLD..............................................................................................................................................................631
Explicit Tracking..............................................................................................................................................................631
Reducing Leave Latency................................................................................................................................................631
Displaying MLD groups table........................................................................................................................................632
Displaying MLD Interfaces............................................................................................................................................632
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