Concept Guide

Table Of Contents
Conguring Anycast RP............................................................................................................................................... 580
Reducing Source-Active Message Flooding......................................................................................................... 581
Specifying the RP Address Used in SA Messages...............................................................................................581
MSDP Sample Congurations......................................................................................................................................583
32 Multiple Spanning Tree Protocol (MSTP)................................................................................................ 586
Protocol Overview.........................................................................................................................................................586
Spanning Tree Variations...............................................................................................................................................587
Implementation Information....................................................................................................................................587
Congure Multiple Spanning Tree Protocol................................................................................................................ 587
Related Conguration Tasks...................................................................................................................................588
Enable Multiple Spanning Tree Globally...................................................................................................................... 588
Adding and Removing Interfaces.................................................................................................................................588
Creating Multiple Spanning Tree Instances................................................................................................................ 589
Inuencing MSTP Root Selection................................................................................................................................590
Interoperate with Non-Dell Bridges.............................................................................................................................590
Changing the Region Name or Revision......................................................................................................................591
Modifying Global Parameters........................................................................................................................................591
Modifying the Interface Parameters............................................................................................................................592
Conguring an EdgePort.............................................................................................................................................. 593
Flush MAC Addresses after a Topology Change....................................................................................................... 594
MSTP Sample Congurations......................................................................................................................................594
Router 1 Running-CongurationRouter 2 Running-CongurationRouter 3 Running-
CongurationSFTOS Example Running-Conguration.......................................................................................595
Debugging and Verifying MSTP Congurations........................................................................................................ 598
33 Multicast Features...................................................................................................................................600
Enabling IP Multicast.....................................................................................................................................................600
Implementation Information......................................................................................................................................... 600
Multicast Policies............................................................................................................................................................601
IPv4 Multicast Policies.............................................................................................................................................601
Understanding Multicast Traceroute (mtrace).......................................................................................................... 608
Important Points to Remember............................................................................................................................. 609
Printing Multicast Traceroute (mtrace) Paths........................................................................................................... 609
Supported Error Codes..................................................................................................................................................610
mtrace Scenarios............................................................................................................................................................ 611
34 Object Tracking........................................................................................................................................ 617
Object Tracking Overview............................................................................................................................................. 617
Track Layer 2 Interfaces.......................................................................................................................................... 618
Track Layer 3 Interfaces.......................................................................................................................................... 618
Track IPv4 and IPv6 Routes....................................................................................................................................619
Set Tracking Delays................................................................................................................................................. 620
VRRP Object Tracking............................................................................................................................................ 620
Object Tracking Conguration..................................................................................................................................... 620
Tracking a Layer 2 Interface................................................................................................................................... 620
20
Contents