Symmetric RTP / RTP Control Protocol (RTCP)

Publisher

IETF / RFC Editor

URL

https://www.rfc-editor.org/rfc/rfc4961.html

Published

2007-07-01

Updated

unknown

Accessed

2026-09-24

HTTP status

200

License

IETF Trust legal provisions; RFC text may be reproduced under IETF Trust terms; excerpts and locators used here

Source notes citing this source

• RFC 4961 gives the reason: NATs without an application layer gateway, and SBCs or media relays behind address-dependent or port-dependent NATs, need endpoints to use symmetric UDP ports to set up bidirectional traffic. in context
• RFC 4961 (BCP 131) recommends always using symmetric RTP and symmetric RTCP for bidirectional media streams. Symmetric means sending from the same UDP port the endpoint receives on. in context

Cite this source record

APA

WarmTransfer. (2007, July 1). Symmetric RTP / RTP Control Protocol (RTCP). WarmTransfer. https://warmtransfer.net/knowledge/sources/rfc-4961-symmetric-rtp

BibTeX

@misc{warmtransfer-rfc-4961-symmetric-rtp,
  title  = {Symmetric RTP / RTP Control Protocol (RTCP)},
  author = {{WarmTransfer}},
  year   = {2007},
  url    = {https://warmtransfer.net/knowledge/sources/rfc-4961-symmetric-rtp},
  note   = {IETF / RFC Editor, accessed 2026-09-24}
}