Alcatel Carrier Internetworking Solutions 6800 User Manual

C-RP Advertisements

Troubleshooting PIM-SM

page 16-10

OmniSwitch Troubleshooting Guide

Candidate-RPs advertisements are periodically unicast from the C-RP to the BSR. These advertisements 
contain group multicast address the router can be responsible for and the priority for the corresponding 
group address. C-RP could be configured to participate as RP for specific multicast groups or for all multi-
cast groups. Highest priority will be 0. Other parameters present in the packet are:

• Holdtime timer, which is the amount of time the advertisement, is valid.

• The prefix count, which tells the number of group addresses contained in the advertisement.

• The unicast RP address which is the interface to advertise as RP.

• The mask length.

IP: ----- IP Header -----

      IP: Protocol        = 103 (PIM)

      IP: Header checksum = DF9E (correct)

      IP: Source address      = [192.168.10.3]

      IP: Destination address = [192.168.11.1]

      IP: No options

      IP: 

192.168.11.1

192.168.11.2

192.168.10.2

192.168.10.3

192.168.9.4

192.168.9.2

C-RP-Adv

RP address 192.168.10.3

Mluticast Group 225.1.1.1