2012/8/7 Eugene Pefti <[email protected]> Thanks, Marta > Correct me if I'm wrong, please, in case I don't have R2 as in Lab 17 I > don't think I have to use any static mroute on my GM? > > Eugene >
Well, I'm not a multicast expert (or even R&S expert - I haven't started studying for CCIE R&S yet :-D ), but if I understand it correctly, 'ip mroute' is necessary. Even if you have only R1 and R2 with ASA between them and you build GRE tunnel between R1 and R2, you will need 'ip mroute' on R2 anyway to inform the router that multicast packets from KS (1.1.1.1) will be received through the tunnel, not through physical interfaces. Usually KS (1.1.1.1) is accessible through physical interface (Serial or FastEthernet) and without the mroute you'll receive error that multicast packets are sourced from the wrong interface. In my configs, I used "ip mroute" on R2 and the connection between R1 and R2 in my lab (or in Lab17) is similar to your situation - I also have GRE tunnel there. Here are the two nice articles about 'ip mroute' and GETVPN + DMVPN: https://sites.google.com/site/amitsciscozone/home/ipsec/get-vpn-rekey-using-multicast http://blog.ine.com/tag/ip-mroute/ Marta Sokolowska.
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