楓葉筆記本

[IP Mobility]
[RFC3775]
Abstract

This document specifies a protocol which allows nodes to remain
reachable while moving around in the IPv6 Internet. Each mobile node
is always identified by its home address, regardless of its current
point of attachment to the Internet. While situated away from its
home, a mobile node is also associated with a care-of address, which
provides information about the mobile node's current location. IPv6
packets addressed to a mobile node's home address are transparently
routed to its care-of address. The protocol enables IPv6 nodes to
cache the binding of a mobile node's home address with its care-of
address, and to then send any packets destined for the mobile node
directly to it at this care-of address. To support this operation,
Mobile IPv6 defines a new IPv6 protocol and a new destination option.
All IPv6 nodes, whether mobile or stationary, can communicate with
mobile nodes.
來源:http://www.faqs.org/rfcs/rfc3775.html