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Title : Problem Statement for MIPv6 Interactions with GPRS/UMTS Packet Filtering
Author(s) : X. Chen, et al.
Filename : draft-chen-mip6-gprs-07.txt
Pages : 17
Date : 2007-2-1
This document provides an analysis of certain inter-working problems
between IPv6 nodes running Mobile IPv6, at least one of which is
connected to a Third Generation Partnership Project (3GPP)
specified General Packet Radio Service/Universal Mobile Tele-
communications System (GPRS/UMTS) network. The inter-working problems are caused by some specific packet filtering operations at the edge
of the GPRS/UMTS network which are applied to control access to the
GPRS/UMTS services and network resources. However, we believe that
other scenarios may exist in which similar packet filtering
operations may be applied and that similar problems would arise in
these more general scenarios.
The GPRS Gateway Support Node (GGSN) checks the source address or
the destination address in the basic IPv6 header of incoming or
outgoing IP datagrams against a set of packet filtering information
established during the GPRS/UMTS session set-up. The packet filtering
information remains stable during the sessions and independent of
Mobile IP. When MIPv6 is activated by either end of the IPv6 mobile
nodes, the packet filtering will fail to perform properly and
subsequently block the traffic due to the mismatch between the packet
filters and the current source address or destination address in the
basic IPv6 header of the IP datagrams to and from the IPv6 mobile
nodes.
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