Concept Guide

33 Multicast Listener Discovery Protocol......................................................................................................575
MLD Version 1................................................................................................................................................................ 575
MLD Querier Router......................................................................................................................................................575
Joining a Multicast Group............................................................................................................................................. 576
Leaving a Multicast Group............................................................................................................................................576
MLD version 2................................................................................................................................................................576
MLD timers.....................................................................................................................................................................578
Reducing Host Response Burstiness.................................................................................................................... 579
Conguring MLD Version..............................................................................................................................................579
Clearing MLD groups.....................................................................................................................................................579
Debugging MLD............................................................................................................................................................. 579
Explicit Tracking............................................................................................................................................................. 579
Reducing Leave Latency...............................................................................................................................................580
Displaying MLD groups table........................................................................................................................................580
Displaying MLD Interfaces............................................................................................................................................580
30 Multiple Spanning Tree Protocol (MSTP)................................................................................................. 581
Protocol Overview..........................................................................................................................................................581
Spanning Tree Variations...............................................................................................................................................582
Implementation Information....................................................................................................................................582
Congure Multiple Spanning Tree Protocol................................................................................................................582
Related Conguration Tasks...................................................................................................................................582
Enable Multiple Spanning Tree Globally...................................................................................................................... 583
Adding and Removing Interfaces.................................................................................................................................583
Creating Multiple Spanning Tree Instances................................................................................................................ 583
Inuencing MSTP Root Selection................................................................................................................................585
Interoperate with Non-Dell Bridges.............................................................................................................................585
Changing the Region Name or Revision..................................................................................................................... 586
Modifying Global Parameters.......................................................................................................................................586
Modifying the Interface Parameters............................................................................................................................587
Conguring an EdgePort.............................................................................................................................................. 588
Flush MAC Addresses after a Topology Change....................................................................................................... 589
MSTP Sample Congurations......................................................................................................................................589
Router 1 Running-CongurationRouter 2 Running-CongurationRouter 3 Running-
CongurationSFTOS Example Running-Conguration.......................................................................................590
Debugging and Verifying MSTP Congurations........................................................................................................ 594
31 Multicast Features................................................................................................................................... 596
Enabling IP Multicast.....................................................................................................................................................596
Implementation Information......................................................................................................................................... 596
Multicast Policies........................................................................................................................................................... 597
IPv4 Multicast Policies............................................................................................................................................ 597
Understanding Multicast Traceroute (mtrace).......................................................................................................... 604
Important Points to Remember............................................................................................................................. 605
Printing Multicast Traceroute (mtrace) Paths........................................................................................................... 605
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