Ubiquitous mobile host internetworking

Argues that being a mobile host (or a mobile capable host) should be a standard property of all hosts in the Internet, and summarizes the design of a new protocol for transparently allowing these mobile hosts to interoperate in the Internet using IP. A mobile host may move from one network to another at any time, while always using only its “home” IP address. Any host may be configured to be a “mobile host” simply by running the appropriate software on it, and there is no penalty for this configuration, since the protocol automatically uses only the standard IP routing mechanisms, adding no overhead to IP, when a mobile host is currently connected to its home network. The protocol scales well to very large numbers of mobile hosts and adds little overhead for packets sent to a mobile host currently connected to a foreign network. The protocol is currently being implemented within the Berkeley networking code and is expected to be available shortly to interested groups outside Carnegie Mellon