I have a few basic questions about PIM Auto-RP mechanism.
Please correct my understanding about these below :
Question 1 -
A router, when configured with the command 'ip pim send-rp-announce loopback0 scope 16' announces itself as RP on the multicast address 188.8.131.52. And, the Mapping Agent listens to these messages on 184.108.40.206 and sorts them as (RP,Groups) and re-announces them on 220.127.116.11.
Question 2 -
We know that RP is basically a mechanism for the sparse PIM mode wherein the routers get access to the multicast tree by reaching the RP router. If that is the case, then how do the routers actually get to know about the Auto-RP multicast group 18.104.22.168/40, in order for it to reach the actual RP for the actual multicast group it needs to join ?
Does it mean that the groups 22.214.171.124 and 126.96.36.199 always works in Dense mode fashion that it reaches all routers and is not pruned (as all routers need to disseminate the Auto-RP discovery information .. ?
Question 3 -
I am thinking of trying a multicast configuration on the routers using static-groups and join-group commands.. Would you know of some real nice useful links that have sample multicast lab examples ?
I know there will be a lot of great replies :-)