Concept Guide

Protocol Overview.........................................................................................................................................................624
Spanning Tree Variations.............................................................................................................................................. 625
Implementation Information....................................................................................................................................625
Congure Multiple Spanning Tree Protocol................................................................................................................625
Related Conguration Tasks...................................................................................................................................626
Enable Multiple Spanning Tree Globally...................................................................................................................... 626
Adding and Removing Interfaces.................................................................................................................................626
Creating Multiple Spanning Tree Instances.................................................................................................................627
Inuencing MSTP Root Selection................................................................................................................................628
Interoperate with Non-Dell Bridges............................................................................................................................. 628
Changing the Region Name or Revision..................................................................................................................... 629
Modifying Global Parameters.......................................................................................................................................629
Modifying the Interface Parameters........................................................................................................................... 630
Setting STP path cost as constant..............................................................................................................................631
Conguring an EdgePort.............................................................................................................................................. 632
Flush MAC Addresses after a Topology Change....................................................................................................... 632
MSTP Sample Congurations......................................................................................................................................633
Router 1 Running-CongurationRouter 2 Running-CongurationRouter 3 Running-
CongurationSFTOS Example Running-Conguration
.......................................................................................633
Debugging and Verifying MSTP Congurations........................................................................................................ 636
35 Multicast Features...................................................................................................................................638
Enabling IP Multicast.....................................................................................................................................................638
Implementation Information..........................................................................................................................................638
Multicast Policies...........................................................................................................................................................639
IPv4 Multicast Policies............................................................................................................................................639
Understanding Multicast Traceroute (mtrace).......................................................................................................... 646
Important Points to Remember..............................................................................................................................647
Printing Multicast Traceroute (mtrace) Paths............................................................................................................647
Supported Error Codes................................................................................................................................................. 648
mtrace Scenarios...........................................................................................................................................................649
36 Multicast Listener Discovery Protocol..................................................................................................... 655
MLD Version 1................................................................................................................................................................ 655
MLD Querier Router......................................................................................................................................................655
Joining a Multicast Group.............................................................................................................................................656
Leaving a Multicast Group............................................................................................................................................656
MLD version 2................................................................................................................................................................656
MLD timers.....................................................................................................................................................................658
Reducing Host Response Burstiness.................................................................................................................... 659
Clearing MLD groups.................................................................................................................................................... 659
Debugging MLD.............................................................................................................................................................659
Explicit Tracking............................................................................................................................................................. 659
Reducing Leave Latency...............................................................................................................................................659
Displaying MLD groups table........................................................................................................................................660
Displaying MLD Interfaces............................................................................................................................................660
Contents
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