RFC 3374 (rfc3374) - Page 1 of 14

Problem Description: Reasons For Performing Context Transfers Between Nodes in an IP Access Network

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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

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