Concept Guide

IPv4 Multicast Policies............................................................................................................................................ 633
Understanding Multicast Traceroute (mtrace).......................................................................................................... 640
Important Points to Remember.............................................................................................................................. 641
Printing Multicast Traceroute (mtrace) Paths............................................................................................................ 641
Supported Error Codes................................................................................................................................................. 642
mtrace Scenarios...........................................................................................................................................................643
35 Multicast Listener Discovery Protocol..................................................................................................... 649
MLD Version 1................................................................................................................................................................ 649
MLD Querier Router......................................................................................................................................................649
Joining a Multicast Group.............................................................................................................................................650
Leaving a Multicast Group............................................................................................................................................650
MLD version 2................................................................................................................................................................650
MLD timers.....................................................................................................................................................................652
Reducing Host Response Burstiness.................................................................................................................... 653
Clearing MLD groups.................................................................................................................................................... 653
Debugging MLD.............................................................................................................................................................653
Explicit Tracking............................................................................................................................................................. 653
Reducing Leave Latency...............................................................................................................................................653
Displaying MLD groups table........................................................................................................................................654
Displaying MLD Interfaces............................................................................................................................................654
MLD Snooping............................................................................................................................................................... 654
Enable MLD Snooping.............................................................................................................................................654
Disable MLD Snooping............................................................................................................................................655
Congure the switch as a querier..........................................................................................................................655
Specify port as connected to multicast router.................................................................................................... 655
Enable Snooping Explicit Tracking.........................................................................................................................656
Display the MLD Snooping Table........................................................................................................................... 656
36 Object Tracking........................................................................................................................................657
Object Tracking Overview.............................................................................................................................................657
Track Layer 2 Interfaces......................................................................................................................................... 658
Track Layer 3 Interfaces......................................................................................................................................... 658
Track IPv4 and IPv6 Routes...................................................................................................................................659
Set Tracking Delays................................................................................................................................................. 660
VRRP Object Tracking............................................................................................................................................ 660
Object Tracking Conguration..................................................................................................................................... 660
Tracking a Layer 2 Interface................................................................................................................................... 660
Tracking a Layer 3 Interface....................................................................................................................................661
Track an IPv4/IPv6 Route...................................................................................................................................... 663
Displaying Tracked Objects........................................................................................................................................... 667
37 Open Shortest Path First (OSPFv2 and OSPFv3)....................................................................................669
Protocol Overview.........................................................................................................................................................669
Autonomous System (AS) Areas........................................................................................................................... 669
Area Types................................................................................................................................................................ 670
Contents
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