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RFC 7022 - Guidelines for Choosing RTP Control Protocol (RTCP) Canonical Names (CNAMEs)

  • Status: Proposed Standard
  • Published: September 2013
  • Stream: IETF
  • Updates: RFC3550
  • Obsoletes: RFC6222
  • Errata: No Errata

Document Information​

  • RFC Number: 7022
  • Title: Guidelines for Choosing RTP Control Protocol (RTCP) Canonical Names (CNAMEs)
  • Authors: A. Begen, C. Perkins, D. Wing, E. Rescorla
  • Date: September 2013
  • Category: Standards Track
  • Obsoletes: RFC 6222
  • Updates: RFC 3550
  • ISSN: 2070-1721

Abstract​

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.

Status of This Memo​

This is an Internet Standards Track document.

This document is a product of the Internet Engineering Task Force (IETF). It represents the consensus of the IETF community. It has received public review and has been approved for publication by the Internet Engineering Steering Group (IESG). Further information on Internet Standards is available in Section 2 of RFC 5741.

Information about the current status of this document, any errata, and how to provide feedback on it may be obtained at http://www.rfc-editor.org/info/rfc7022.

Copyright (c) 2013 IETF Trust and the persons identified as the document authors. All rights reserved.

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