A New Internet-Draft is available from the on-line Internet-Drafts directories.
Title : GRE Key Extension for Mobile IPv4
Author(s) : P. Yegani, et al.
Filename : draft-yegani-gre-key-extension-00.txt
Pages : 6
Date : 2005-10-6
The GRE specification contains a Key field, which MAY contain a value
that is used to identify a particular GRE data stream. This
specification defines a new Mobile IP extension that is used to
exchange the value to be used in the GRE Key field. This extension
further allows the Mobility Agents to setup the necessary protocol
interfaces prior to receiving the mobile's traffic. The new extension
option allows a foreign agent to request GRE tunneling without
disturbing the Home Agent behavior specified for Mobile Ipv4 [2]. GRE
tunneling provides an advantage that allows operator?s private home
networks to be overlaid and allows the HA to provide overlapping home
addresses to different subscribers. When the tuple <Care of Address,
Home Address and Home Agent Address> is the same across multiple
subscriber sessions, GRE
tunneling will provide a means for the FA and HA to identify data
streams for the individual sessions based on the GRE key. In the
absence of this key identifier, the data streams cannot be
distinguished from each other, a significant drawback when using IP-in-
IP tunneling.
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