Document Type Expired Internet-Draft (individual)
Author Dave Crocker 
Last updated 2003-10-22
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Expired & archived
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


An IP Address serves the dual roles as references to a 'place' on the Internet and to a host on the Internet, labeled 'locator' and 'identifier', respectively. Systems that use IP Addresses as identifiers cannot support dynamic changes in the mapping between the identifier and the locator. For a system to use a different IP Address pair, participants must initiate a new exchange. In the case of TCP, this means a new connection. In recent years, there have been efforts to overcome this limitation, through different approaches at different places in the Internet architecture. This paper reviews the basic requirements for support of multiaddressing (mobility and multihoming), and the efforts to support them. Barriers to adoption, administrative overhead, and operational efficiency are of particular concern.


Dave Crocker (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)