This memo describes an approach to transparent mobile internetworking, meaning that unchanged hosts can move among networks in a fashion transparent to protocols above IP, while at the same time providing steady state optimal routing between either a pair of moving hosts or between a moving host and a stationary host. The approach rests upon the existence of a limited set of entities, called Base Access Stations (BAS) and Mobile Routers (MR) that coordinate forwarding among mobile hosts (MH).