I-D ACTION:draft-ietf-mmusic-sdp4nat-03.txt

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This draft is a work item of the Multiparty Multimedia Session Control Working Group of the IETF.

	Title		: RTCP attribute in SDP
	Author(s)	: C. Huitema
	Filename	: draft-ietf-mmusic-sdp4nat-03.txt
	Pages		: 9
	Date		: 2002-11-4
	
The session description protocol (SDP) is used to describe the 
parameters of media streams used in multimedia sessions. When a 
session requires multiple ports, SDP assumes that these port have 
consecutive numbers. However, when the session crosses a network 
address translation device that also uses port mapping, the ordering 
of ports can be destroyed by the translation. To handle this, we 
propose an extension attribute to SDP.

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