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RFC 7022
Title: Guidelines for Choosing RTP Control
Protocol (RTCP) Canonical Names (CNAMEs)
Author: A. Begen, C. Perkins,
D. Wing, E. Rescorla
Status: Standards Track
Stream: IETF
Date: September 2013
Mailbox: abegen@cisco.com,
csp@csperkins.org,
dwing@cisco.com,
ekr@rtfm.com
Pages: 10
Characters: 21717
Obsoletes: RFC 6222
Updates: RFC 3550
I-D Tag: draft-ietf-avtcore-6222bis-06.txt
URL: http://www.rfc-editor.org/rfc/rfc7022.txt
The RTP Control Protocol (RTCP) Canonical Name (CNAME) is a
persistent transport-level identifier for an RTP endpoint. While the
Synchronization Source (SSRC) identifier of an RTP endpoint may
change if a collision is detected or when the RTP application is
restarted, its RTCP CNAME is meant to stay unchanged, so that RTP
endpoints can be uniquely identified and associated with their RTP
media streams.
For proper functionality, RTCP CNAMEs should be unique within the
participants of an RTP session. However, the existing guidelines for
choosing the RTCP CNAME provided in the RTP standard (RFC 3550) are
insufficient to achieve this uniqueness. RFC 6222 was published to
update those guidelines to allow endpoints to choose unique RTCP
CNAMEs. Unfortunately, later investigations showed that some parts
of the new algorithms were unnecessarily complicated and/or
ineffective. This document addresses these concerns and replaces RFC
6222.
This document is a product of the Audio/Video Transport Core Maintenance Working Group of the IETF.
This is now a Proposed Standard.
STANDARDS TRACK: This document specifies an Internet standards track
protocol for the Internet community,and requests discussion and suggestions
for improvements. Please refer to the current edition of the Internet
Official Protocol Standards (STD 1) for the standardization state and
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