RFC 1688 (rfc1688) - Page 2 of 9
IPng Mobility Considerations
Alternative Format: Original Text Document
RFC 1688 IPng Mobility August 1994
6.2 Simple Fields ................................... 9
6.3 Simple Tests .................................... 9
6.4 Type, Length, Value ............................. 9
Acknowledgements ............................................. 9
Security Considerations ...................................... 9
Author's Address ............................................. 9
1. Introduction
Current versions of the Internet Protocol make an implicit assumption
that a node's point of attachment remains fixed. Datagrams are sent
to a node based on the location information contained in the node's
IP address.
If a node moves while keeping its IP address unchanged, its IP
network number will not reflect its new point of attachment. The
routing protocols will not be able to route datagrams to it
correctly.
A number of considerations arise for routing these datagrams to a
Mobile Node.
2. Addressing
Each Mobile Node must have at least one Home-Address which identifies
it to other nodes. This Home-Address must be globally unique.
2.1. Ownership
The presence of ownership information in the Home-Address would be
beneficial. A Mobile Node will be assigned a Home-Address by the
organization that owns the machine, and will be able to use that
Home-Address regardless of the current point of attachment.
The ownership information must be organized in such a fashion to
facilitate "inverse" lookup in the Domain Name Service, and other
future services.
Ownership information could be used by other nodes to ascertain the
current topological location of the Mobile Node.
Ownership information could also be used for generation of accounting
records.
Simpson