Concept Guide

32 Multicast Listener Discovery Protocol......................................................................................................577
MLD Version 1.................................................................................................................................................................577
MLD Querier Router...................................................................................................................................................... 577
Joining a Multicast Group............................................................................................................................................. 578
Leaving a Multicast Group............................................................................................................................................578
MLD version 2................................................................................................................................................................ 578
MLD timers.....................................................................................................................................................................580
Reducing Host Response Burstiness..................................................................................................................... 581
Conguring MLD Version.............................................................................................................................................. 581
Clearing MLD groups..................................................................................................................................................... 581
Debugging MLD..............................................................................................................................................................581
Explicit Tracking..............................................................................................................................................................581
Reducing Leave Latency...............................................................................................................................................582
Displaying MLD groups table........................................................................................................................................582
Displaying MLD Interfaces............................................................................................................................................582
30 Multiple Spanning Tree Protocol (MSTP)................................................................................................ 583
Protocol Overview.........................................................................................................................................................583
Spanning Tree Variations.............................................................................................................................................. 584
Implementation Information....................................................................................................................................584
Congure Multiple Spanning Tree Protocol................................................................................................................584
Related Conguration Tasks...................................................................................................................................584
Enable Multiple Spanning Tree Globally...................................................................................................................... 585
Adding and Removing Interfaces.................................................................................................................................585
Creating Multiple Spanning Tree Instances................................................................................................................ 585
Inuencing MSTP Root Selection................................................................................................................................587
Interoperate with Non-Dell Bridges............................................................................................................................. 587
Changing the Region Name or Revision..................................................................................................................... 588
Modifying Global Parameters.......................................................................................................................................588
Modifying the Interface Parameters........................................................................................................................... 589
Conguring an EdgePort.............................................................................................................................................. 590
Flush MAC Addresses after a Topology Change........................................................................................................ 591
MSTP Sample Congurations.......................................................................................................................................591
Router 1 Running-CongurationRouter 2 Running-CongurationRouter 3 Running-
CongurationSFTOS Example Running-Conguration.......................................................................................592
Debugging and Verifying MSTP Congurations........................................................................................................ 596
31 Multicast Features................................................................................................................................... 598
Enabling IP Multicast.....................................................................................................................................................598
Implementation Information......................................................................................................................................... 598
Multicast Policies...........................................................................................................................................................599
IPv4 Multicast Policies............................................................................................................................................599
Understanding Multicast Traceroute (mtrace).......................................................................................................... 606
Important Points to Remember..............................................................................................................................607
Printing Multicast Traceroute (mtrace) Paths............................................................................................................607
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