Multicast NAT gre tunnel

Unanswered Question
Mar 9th, 2007
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Using Catalyst 6504 with MSFC. Host on vlan2 generates multicast. Tunnel source from vlan5 to get around non-multicast elements. Tunnel works - multicast packets are received by listeners on the other end of the tunnel.

Within the 6504 MSFC, I want to nat the multicast source address. Packets appear to be getting to the tunnel before nat processing.

I tried policy routing to make the multicast packets go thru Loopback1, but appears that policy routing ignores multicast packets.

How can I implement nat on this router?

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drolemc Thu, 03/15/2007 - 15:05
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I think if you are passing IGMP packets through the tunnel, then they wont be NATted. There could be other such type of packets that cannot be NATted. Please try with some different type of packets.


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