Concept Guide

Understanding Multicast Traceroute (mtrace)...........................................................................................................634
Important Points to Remember............................................................................................................................. 635
Printing Multicast Traceroute (mtrace) Paths........................................................................................................... 635
Supported Error Codes.................................................................................................................................................636
mtrace Scenarios........................................................................................................................................................... 637
35 Multicast Listener Discovery Protocol..................................................................................................... 643
MLD Version 1................................................................................................................................................................ 643
MLD Querier Router......................................................................................................................................................643
Joining a Multicast Group.............................................................................................................................................644
Leaving a Multicast Group............................................................................................................................................644
MLD version 2................................................................................................................................................................644
MLD timers.....................................................................................................................................................................646
Reducing Host Response Burstiness.................................................................................................................... 647
Clearing MLD groups.....................................................................................................................................................647
Debugging MLD............................................................................................................................................................. 647
Explicit Tracking............................................................................................................................................................. 647
Reducing Leave Latency...............................................................................................................................................647
Displaying MLD groups table........................................................................................................................................648
Displaying MLD Interfaces............................................................................................................................................648
MLD Snooping............................................................................................................................................................... 648
Enable MLD Snooping.............................................................................................................................................648
Disable MLD Snooping............................................................................................................................................649
Congure the switch as a querier..........................................................................................................................649
Specify port as connected to multicast router.................................................................................................... 649
Enable Snooping Explicit Tracking.........................................................................................................................650
Display the MLD Snooping Table...........................................................................................................................650
36 Object Tracking........................................................................................................................................ 651
Object Tracking Overview............................................................................................................................................. 651
Track Layer 2 Interfaces..........................................................................................................................................652
Track Layer 3 Interfaces..........................................................................................................................................652
Track IPv4 and IPv6 Routes................................................................................................................................... 653
Set Tracking Delays................................................................................................................................................. 654
VRRP Object Tracking............................................................................................................................................ 654
Object Tracking Conguration..................................................................................................................................... 654
Tracking a Layer 2 Interface................................................................................................................................... 654
Tracking a Layer 3 Interface................................................................................................................................... 655
Track an IPv4/IPv6 Route...................................................................................................................................... 657
Displaying Tracked Objects............................................................................................................................................661
37 Open Shortest Path First (OSPFv2 and OSPFv3)....................................................................................663
Protocol Overview.........................................................................................................................................................663
Autonomous System (AS) Areas........................................................................................................................... 663
Area Types................................................................................................................................................................ 664
Networks and Neighbors........................................................................................................................................665
Contents
21