I-D ACTION:draft-ietf-sip-connect-reuse-06.txt

A New Internet-Draft is available from the on-line Internet-Drafts 
directories.
This draft is a work item of the Session Initiation Protocol Working Group of the IETF.

	Title		: Connection Reuse in the Session Initiation Protocol (SIP)
	Author(s)	: R. Mahy, et al.
	Filename	: draft-ietf-sip-connect-reuse-06.txt
	Pages		: 21
	Date		: 2006-8-21

When SIP entities use a connection oriented protocol to send a
request, they typically originate their connections from an ephemeral
port.  The SIP protocol includes mechanisms which insure that
responses to a request, and new requests sent in the original
direction reuse an existing connection.  However, new requests sent
in the opposite direction are unlikely to reuse the existing
connection.  This frequently causes a pair of SIP entities to use one
connection for requests sent in each direction, and can result in
potential scaling and performance problems.  This document proposes
requirements and a mechanism which address this deficiency in
environments where the connection could be opened in either
direction.

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