I have a P2P connection via Frame-Relay between two offices.
From the router on each end, I can ping everything on the LAN interface of the router. I can even ping the firewall interface for the LAN, but I can't ping an outside IP address.
But from those same routers and from the LAN those routers are connected, I can ping the LAN interface of the remote router, but I can't ping anything connected to the LAN interface on the remote router.
I've attached a rough topomap of the network with IP's. Notice the dividing line between the routers. That's an imaginary boundry of how far I can ping, with the exception of being able to ping the remote routers LAN interface, I can't ping anything beyond that.
I've also included pertinent router config regarding routing of data and IP setup of each interface. I only included the topo map for reference. I don't want the complexity of the network to confuse the issue, and I can't even ping the firewall interface directly connected to each router.