Cisco Support Community
cancel
Showing results for 
Search instead for 
Did you mean: 
Community Member

Can't NAT multicast packet's source address

See the attached diagram. I have a multicast source (PC#1) connected to a subinterface on a router, via a switch. The IP address for PC#1 192.168.0.200 must be NAT'd to 10.1.1.200. The traffic is GRE tunnelled to another switch (6500) and then on to PC#2. The interface and the Tunnel on the 7200 are in vrf ABCD. Multicast is running in sparse-mode. From PC#1 I can ping PC#2 and the source address is NAT'd OK. PC#2 can subscribe to PC#1 multicast feed but the multicast UDP packets source address is not NAT'd. I have also tried NAT Virtual Interface on the incoming subinterface but this does not work either. I wonder if anyone can help?

3 REPLIES
Community Member

Re: Can't NAT multicast packet's source address

Attachment added ....

Community Member

Re: Can't NAT multicast packet's source address

In fact when I try to put NVI on the incoming subinterface neither the ping nor the multicast source addresses are NAT'd, however the translation appears in the "show ip nat nvi translations" list.

Community Member

Can't NAT multicast packet's source address

Hey Im having a similliar issue in my Works I&T lab. Have you been able to resolve this issue

Nat doest seem to be occuring before the packet is forwarded to the neighboring router. When looking at the mcast routing table. It shows the Non NAT'ed Ip address on the interface where the source packet came from (same subnet as unitcast source unicast IP)

248
Views
0
Helpful
3
Replies
CreatePlease to create content