RFC 3374 (rfc3374) - Page 1 of 14
Problem Description: Reasons For Performing Context Transfers Between Nodes in an IP Access Network
Alternative Format: Original Text Document
Network Working Group J. Kempf, Ed.
Request for Comments: 3374 September 2002
Category: Informational
Problem Description: Reasons For Performing Context Transfers
Between Nodes in an IP Access Network
Status of this Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (2002). All Rights Reserved.
Abstract
In IP access networks that support host mobility, the routing paths
between the host and the network may change frequently and rapidly.
In some cases, the host may establish certain context transfer
candidate services on subnets that are left behind when the host
moves. Examples of such services are Authentication, Authorization,
and Accounting (AAA), header compression, and Quality of Service
(QoS). In order for the host to obtain those services on the new
subnet, the host must explicitly re-establish the service by
performing the necessary signaling flows from scratch. In some
cases, this process would considerably slow the process of
establishing the mobile host on the new subnet. An alternative is to
transfer information on the existing state associated with these
services, or context, to the new subnet, a process called "context
transfer". This document discusses the desirability of context
transfer for facilitating seamless IP mobility.
Kempf Informational