Hello, A basic question on the operation of MSDP in regards to the packet flow from a client in one AS to the multicast-source in another AS.
R1 - R2 (RP) - R3 ----- R4 - R5 - R6 (RP) R1, R2 and R3 = AS X R4, R5 and R6 = AS Y Lets assume I have an auto rp in AS X and auto rp in AS Y. They both have reachability and can form msdp peering, perfect up till this point. The client in AS X tries pinging the multicast-source in AS Y: My understanding so FAR is that the client sends the packet to the RP and then the RP should send the packet to the multicast-source so that when the multicast-source responds back it knows the where to send the packet back to i.e. the RP in AS X. However when i ping from the RP in AS X, I see the multicast-source replying back to it (it has the route back to the initiators IP) ... when i ping from some other router in AS X, the multicast-source doesn't reply back. Investigating it I found out that the multicast-source has no idea where this new initiator is. If it is not the RP of AS X that multicast-source sees the packet from then in this case I will have to redistribute igp into bgp, in other words without route-maps and stuff at the point of redistribution I will be basically advertising my internal network to another AS in this case AS Y. Is this the right way? What am I missing? Is there any way that the multicast-source sees the packet coming from the source IP of AS X's RP when pinging from R1? -- Samir Idris _______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com
