This is continuing from:
Network Infrastructure / LAN, Switching and Routing / Configuring IGMP on 2950 Switches
http://forum.cisco.com/eforum/servlet/NetProf?page=netprof&forum=Network%20Infrastructure&topic=LAN%2C%20Switching%20and%20Routing&CommCmd=MB%3Fcmd%3Dpass_through%26location%3Doutline%40%5E1%40.1ddab1b5
I have successfully set up multicast routing on my network. The router (1760/2621) is a multicast router, the 2950 switches are only sending multicast traffic to the necessary ports and everything appeared to be going well. Bandwidth is being utilized as well as can be expected.
I am, however, experiencing an issue with NAT on the router sub-interface that is configured for multicast. Whenever I try to come into the network from the outside, either using static NAT or extendable PAT, the NAT session appears to be setup but the connection never occurs. I'm looking at "show ip nat translation" and the NAT session is listed, but I am unable to connect to the device. This is for all ports that are configured using either of these statements:
ip nat inside source static 10.10.1.2 192.168.0.1
ip nat inside source static tcp 10.10.1.2 3389 192.168.0.1 3389
Here is the relavant multicast config I am using:
ip multicast-routing
int f0/0.6
ip address 10.10.1.1 255.255.255.0
ip pim spare-dense-mode
I have several reasons to suspect the multicast configuration:
1) When I remove the multicast config from the sub-interface, it works fine.
2) When I connect from an "outside" interface (GRE tunnel, for example) that doesn't use NAT, it works fine.
3) When I connect to a device on a different sub-interface that doesn't use multicast, it works fine.
I need to leave multicast enabled on this sub-interface and I need to have the NATs work.
Any suggestions?
Jeff
