Afternoon all, would very much appreciate your help with this. I have knocked up several adhoc topologies (gns3) for multicast over layer 3 vpn, and all went as I would expect until I decided to try anycast RP. This didn't work. Fearing it was my lack of understanding, I reduced the complexity to non layer 3 vpn and implemented MSDP. No problems. Cleared that down, any cast config, no problem. Back to layer 3 vpn anycast but can't get it working. It could be the instability of the gns3 causing issues as topology often flaps, but I don't think so.
My latest topology (I tried a few), consisted of five routers.. R4 --- R2 --- R1 --- R3 --- R5 R2, R3 = PE R1 = P R4, R5 = CE Layer 3 vpn config with mdt default using SSM in core. OSPF between CE and PE's. To start with, I set up R2 as BSR from lo1, and RP from lo2. All routers successfully learn BSR and RP and multicast works. Then I add lo2 to R3, with same IP address as R2, and configure it as RP candidate. Now, local RP's on either side see their local multicst joins etc, and multicast works on either side of the core, but not across core (as expected) due to unknown sources. So I configure MSDP between the RP's, connecting from lo1 interfaces. Msdp sa-cache correctly shows active sources, but multicast cross core stops working. For completeness I configure another BSR candidate on R3 from lo1 but it makes no difference. Am I missing some complication from the layer 3 vpn? Is this a valid configuration? My ldp, ospf, bgp and mdt do become quite unstable in the core due gns3 resource I think, so this might account for it, but I would expect to see some sign of life. Mdt/msdp does come up so at that point I would expect success... but nothing. No config attached so this is all to check my suggested config would be valid. Worked fine in the non layer 3 vpn config, so I assume it is... Thanks for your time if you have been kind enough to read all this! _______________________________________________ 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 http://onlinestudylist.com/mailman/listinfo/ccie_rs
