I am a bit confused on how to handle RTP streams on phones that register to CME from across a VPN.
Here is the diagram: (SIP phones on the 192.168.1.0/24 network register with the 2811)
When I make inbound calls I can see RTP streams from 192.168.1.0/24 to the loopback IP but since that network does not live on the 2811 I cannot write a NAT rule for it.
I have tried writing a NAT rule to NAT RTP to loopback 0 on the 2811, but this does not seem to work either.
2811-VOIP-1#sh run | s ip nat pool
ip nat pool rtp 172.16.3.1 172.16.3.1 netmask 255.255.255.0 type rotary
2811-VOIP-1#sh ip access 100
10 permit udp any any range 10000 20000
2811-VOIP-1#sh run | inc ip nat
no ip nat service allow-sip-even-rtp-port
ip nat pool rtp 172.16.3.1 172.16.3.1 netmask 255.255.255.0 type rotary
ip nat inside source static udp 172.16.3.1 5060 interface FastEthernet0/1.98 5060
ip nat inside source static tcp 172.16.3.1 5060 interface FastEthernet0/1.98 5060
ip nat inside source list 1 interface FastEthernet0/1.98 overload
ip nat inside destination list 100 pool rtp
