Concept Guide

Congure Multiple Spanning Tree Protocol................................................................................................................634
Related Conguration Tasks...................................................................................................................................634
Enable Multiple Spanning Tree Globally...................................................................................................................... 635
Adding and Removing Interfaces.................................................................................................................................635
Creating Multiple Spanning Tree Instances................................................................................................................ 635
Inuencing MSTP Root Selection................................................................................................................................636
Interoperate with Non-Dell Bridges............................................................................................................................. 637
Changing the Region Name or Revision..................................................................................................................... 637
Modifying Global Parameters....................................................................................................................................... 638
Modifying the Interface Parameters........................................................................................................................... 639
Conguring an EdgePort.............................................................................................................................................. 640
Flush MAC Addresses after a Topology Change........................................................................................................ 641
MSTP Sample Congurations.......................................................................................................................................641
Router 1 Running-CongurationRouter 2 Running-CongurationRouter 3 Running-
CongurationExample Running-Conguration..................................................................................................... 641
Debugging and Verifying MSTP Congurations........................................................................................................ 644
33 Multicast Features...................................................................................................................................646
Enabling IP Multicast.....................................................................................................................................................646
Implementation Information..........................................................................................................................................646
First Packet Forwarding for Lossless Multicast......................................................................................................... 647
Multicast Policies........................................................................................................................................................... 647
IPv4 Multicast Policies............................................................................................................................................ 647
Understanding Multicast Traceroute (mtrace).......................................................................................................... 654
Important Points to Remember............................................................................................................................. 655
Printing Multicast Traceroute (mtrace) Paths........................................................................................................... 655
Supported Error Codes.................................................................................................................................................656
mtrace Scenarios........................................................................................................................................................... 657
34 Multicast Listener Discovery Protocol..................................................................................................... 663
MLD Version 1................................................................................................................................................................ 663
MLD Querier Router......................................................................................................................................................663
Joining a Multicast Group.............................................................................................................................................664
Leaving a Multicast Group............................................................................................................................................664
MLD version 2................................................................................................................................................................664
MLD timers.....................................................................................................................................................................666
Reducing Host Response Burstiness.................................................................................................................... 667
Conguring MLD Version..............................................................................................................................................667
Clearing MLD groups.....................................................................................................................................................667
Debugging MLD............................................................................................................................................................. 667
Explicit Tracking............................................................................................................................................................. 667
Reducing Leave Latency...............................................................................................................................................668
Displaying MLD groups table........................................................................................................................................668
Displaying MLD Interfaces............................................................................................................................................668
MLD Snooping............................................................................................................................................................... 668
Enable MLD Snooping.............................................................................................................................................669
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