Health be upon you,
here is the scenario, router H is connected to router I which in turn is connected to 2 other routers, L and M.
Router M is not under my control.
there are ip phones connected to router L and they communicate with the cucm on router M since router M has static routes for them and router H has static routes for the cucm.
now one phone has been moved to the network of router H. instead of configuring a static route on router M for a new network, I am stuck with natting the existing network in the new location.
here is the situation: the phone registers but voice is heard only one way. Specifically, If we call someone connected to router L, they can only hear us. If we call someone on router M, they can only hear us! I plugged a notebook to the iphone and wire sharked, and there were no rtp messages which makes me suspect that rtp messages are not being forwarded.
here is the configuration:
router H:
vpn tunnel 10
ip nat outside
int G0/0.5
description Voice
encapsulation dot1Q 5
ip address 192.168.1.1 255.255.255.0
no ip redirects
no ip unreachables
no ip proxy-arp
ip flow ingress
ip nat inside
ip virtual-reassembly in
ip nat inside source static 192.168.1.1 192.168.101.1
the network 192.168.101.0/24 exists on a subinterface on router L.
On router H
sh ip route | i 192.168.101
192.168.101.0/32 is subnetted, 1 subnets
S 192.168.101.1 [1/0] via 192.168.198.1
A default route is learned from other routers
0.0.0.0/0 [***/54217] via 172.19.147.1, 1w0d, Tunnel1
Router I routes:
sh ip rout | i 192.168.201
192.168.101.0/24 is variably subnetted, 2 subnets, 2 masks
192.168.101.0/24 [***/2024] via 10.26.11.2, 7w0d, Port-channel10.27
192.168.101.7/32 [***/53046] via 172.19.147.17, 1w0d, Tunnel1
knowing that the old location communicates just fine with router M!
i tried adding:
ip nat service sip tcp 5060
ip nat service allow-sip-even-rtp-ports
but they are enabled by default.
Anyone has a clue? is it port forwarding?
