Hello, We run a hub and spoke IPSEC VPN setup for a client. We run GRE inside the IPSEC in order to pass OSPF. Tunnels work very well, including RDP, etc., but will not pass an H.323 voice session. VPN is router-to-router, 1711 on one end, 2611 on the other. IOS is 12.3(1a) on 1711, 12.2(?) on 2611.
All ideas gratefully received.