Hi there, I tried to do some practice on frame realy, my situation is like this, I have 2 Routers being connected via Frame Relay each other(a frame relay switch in the middle), the ping is OK between the 2 Routers, but I can't ping from a network behind my router1 (192.168.10.0) to a network behind router2 (10.10.10.0), I put all of the networks in OSPF routing protocol, but I can't figure it out what the problem is... here is my topology: