Concept Guide

31 Multiple Spanning Tree Protocol (MSTP)................................................................................................. 535
Protocol Overview.........................................................................................................................................................535
Spanning Tree Variations.............................................................................................................................................. 536
Implementation Information................................................................................................................................... 536
Congure Multiple Spanning Tree Protocol................................................................................................................536
Related Conguration Tasks................................................................................................................................... 537
Enable Multiple Spanning Tree Globally.......................................................................................................................537
Adding and Removing Interfaces................................................................................................................................. 537
Creating Multiple Spanning Tree Instances................................................................................................................ 538
Inuencing MSTP Root Selection................................................................................................................................539
Interoperate with Non-Dell Bridges.............................................................................................................................539
Changing the Region Name or Revision..................................................................................................................... 540
Modifying Global Parameters.......................................................................................................................................540
Modifying the Interface Parameters............................................................................................................................ 541
Conguring an EdgePort.............................................................................................................................................. 542
Flush MAC Addresses after a Topology Change....................................................................................................... 543
MSTP Sample Congurations......................................................................................................................................543
Router 1 Running-CongurationRouter 2 Running-CongurationRouter 3 Running-
CongurationSFTOS Example Running-Conguration.......................................................................................544
Debugging and Verifying MSTP Congurations........................................................................................................ 547
32 Multicast Features...................................................................................................................................549
Enabling IP Multicast.....................................................................................................................................................549
Implementation Information......................................................................................................................................... 549
Multicast Policies...........................................................................................................................................................550
IPv4 Multicast Policies............................................................................................................................................550
Understanding Multicast Traceroute (mtrace).....................................................................................................557
Printing Multicast Traceroute (mtrace) Paths..................................................................................................... 558
Supported Error Codes...........................................................................................................................................559
mtrace Scenarios.....................................................................................................................................................560
33 Multicast Listener Discovery Protocol..................................................................................................... 566
MLD Version 1................................................................................................................................................................ 566
MLD Querier Router......................................................................................................................................................566
Joining a Multicast Group............................................................................................................................................. 567
Leaving a Multicast Group............................................................................................................................................567
MLD version 2................................................................................................................................................................567
MLD timers.....................................................................................................................................................................569
Reducing Host Response Burstiness.................................................................................................................... 570
Clearing MLD groups.....................................................................................................................................................570
Debugging MLD............................................................................................................................................................. 570
Explicit Tracking............................................................................................................................................................. 570
Reducing Leave Latency...............................................................................................................................................570
Displaying MLD groups table.........................................................................................................................................571
Displaying MLD Interfaces.............................................................................................................................................571
Contents
19