Concept Guide

Enable Multiple Spanning Tree Globally....................................................................................................................... 631
Adding and Removing Interfaces..................................................................................................................................631
Creating Multiple Spanning Tree Instances.................................................................................................................631
Inuencing MSTP Root Selection................................................................................................................................632
Interoperate with Non-Dell Bridges.............................................................................................................................633
Changing the Region Name or Revision..................................................................................................................... 633
Modifying Global Parameters....................................................................................................................................... 634
Modifying the Interface Parameters........................................................................................................................... 635
Conguring an EdgePort.............................................................................................................................................. 636
Flush MAC Addresses after a Topology Change........................................................................................................637
MSTP Sample Congurations...................................................................................................................................... 637
Router 1 Running-CongurationRouter 2 Running-CongurationRouter 3 Running-
CongurationExample Running-Conguration.....................................................................................................637
Debugging and Verifying MSTP Congurations........................................................................................................ 640
33 Multicast Features................................................................................................................................... 642
Enabling IP Multicast.....................................................................................................................................................642
Implementation Information..........................................................................................................................................642
First Packet Forwarding for Lossless Multicast.........................................................................................................643
Multicast Policies...........................................................................................................................................................643
IPv4 Multicast Policies............................................................................................................................................ 643
Understanding Multicast Traceroute (mtrace).......................................................................................................... 650
Important Points to Remember.............................................................................................................................. 651
Printing Multicast Traceroute (mtrace) Paths............................................................................................................ 651
Supported Error Codes.................................................................................................................................................652
mtrace Scenarios...........................................................................................................................................................653
34 Multicast Listener Discovery Protocol..................................................................................................... 659
MLD Version 1................................................................................................................................................................ 659
MLD Querier Router......................................................................................................................................................659
Joining a Multicast Group.............................................................................................................................................660
Leaving a Multicast Group............................................................................................................................................660
MLD version 2................................................................................................................................................................660
MLD timers.....................................................................................................................................................................662
Reducing Host Response Burstiness.................................................................................................................... 663
Conguring MLD Version..............................................................................................................................................663
Clearing MLD groups.....................................................................................................................................................663
Debugging MLD.............................................................................................................................................................663
Explicit Tracking............................................................................................................................................................. 663
Reducing Leave Latency...............................................................................................................................................664
Displaying MLD groups table........................................................................................................................................664
Displaying MLD Interfaces............................................................................................................................................664
MLD Snooping............................................................................................................................................................... 664
Enable MLD Snooping............................................................................................................................................ 665
Disable MLD Snooping............................................................................................................................................665
Congure the switch as a querier..........................................................................................................................665
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