I have a few routers that have established DMVPN tunnels on both Frame-Relay and wireless links. EIGRP neighborships are established via the tunnel interfaces and I'm able to ping throughout the network (remote to remote & remote to DMVPN headend routers). CDP is globally enabled on all routers, however I only see CDP neighbors across the wireless media. CDP has been specifically enabled on the Frame-Relay sub-interfaces and tunnel interfaces. Is there any way to see CDP neighbors across NBMA media or the Tunnel interfaces? The headend routers are 3845s using IOS 12.4(4) w/ Advanced IP Services and 2801s (remote sites) using IOS 12.3(8r) w/ Advanced Security. The 'show cdp interface' output indicates that the Frame-Relay sub-interfaces are sending packets, but none of these show up when the 'show cdp neigh' command is issued on either side of the FR link.
I have this problem too.