I have a testbed environment at home. I have two 2611s and a 1601 connected to a 3620 (w/ a NM-4A/S), acting as a frame relay switch. I am trying to configure static maping between the three, so they all would be fully meshed. (See attached picture). It does not work. I cannot ping from one router to the other. When I delete the static maps and enable inverse-arp on all 3 routers, it works like a champ. I cleared the inversearp entries on all three routers. Routers 1&2 (2611s) are running IOS12.3, R3 (1601) is running 12.0. I have included a txt file with the configs and show output. Any help would be greatly appreciated. I haev banging my head against the wall for the past 3 days with this. Everything I have research on the web has shown that this should work I believe.