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RFC 6947
Title: The Session Description Protocol (SDP)
Alternate Connectivity (ALTC) Attribute
Author: M. Boucadair, H. Kaplan,
R. Gilman, S. Veikkolainen
Status: Informational
Stream: Independent
Date: May 2013
Mailbox: mohamed.boucadair@orange.com,
hkaplan@acmepacket.com,
bob_gilman@comcast.net,
Simo.Veikkolainen@nokia.com
Pages: 24
Characters: 51910
Updates/Obsoletes/SeeAlso: None
I-D Tag: draft-boucadair-mmusic-altc-09.txt
URL: http://www.rfc-editor.org/rfc/rfc6947.txt
This document proposes a mechanism that allows the same SDP offer to
carry multiple IP addresses of different address families (e.g., IPv4
and IPv6). The proposed attribute, the "altc" attribute, solves the
backward-compatibility problem that plagued Alternative Network
Address Types (ANAT) due to their syntax.
The proposed solution is applicable to scenarios where connectivity
checks are not required. If connectivity checks are required,
Interactive Connectivity Establishment (ICE), as specified in RFC
5245, provides such a solution.
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