Hello guys,
I need some help with the DMVPN tunnel and VOIP traffic passing through.
I have a simple topology, hub with static IP address and two hubs with dynamic IPs.
I have created a DMVPN tunnel with IPSEC on top of it and static routes over the tunnel interface.
IPSEC is coming up and spokes can communicate with the hub.
The problem is with VOIP. There is a PBX server on the hub location, with phones on the spokes that should register to it. Spokes phones register to 5060, but they won't register to UDP signaling ports 10000-20000.
It was suggested to me the problem is in NAT. However, I highly doubt so, since this is not a traditional VPN tunnel, but DMVPN, so there is no NATting, the traffic is routed through the tunnel.
I have removed all the access lists form the interfaces, so there shouldn't be anything blocking the traffic.
In my understanding DMVPN is not using access lists to define interesting traffic but rather all the traffic passing through the tunnel is encrypted.
Any thoughts or ideas?
I can post configs if needed.
Thanks in advance.
