Very interesting. In computer networking, we deal with this same information problem, and the solution (not sending the information from the forward node back to the forward node) is referred to as Split Horizon.
Suppose that Node A can reach Network 1 directly - in one hop. So he tells his neighbor, Node B, "I can get to Network 1 in one hop!". Node B records "okay, I can get there in two hops then." The worry is that when Node A loses his connection to Network 1, he asks Node B how to get there, and Node B says "don't worry, I... (read more)