Real-time Transport Protocol (RTP)

RTP, the real-time transport protocol. RTP provides end-to-end network transport functions suitable for applications transmitting real-time data, such as audio, video or simulation data, over multicast or unicast network services. RTP does not address resource reservation and does not guarantee quality-of-service for real-time services. The data transport is augmented by a control protocol (RTCP) to allow monitoring of the data delivery in a manner scalable to large multicast networks, and to provide minimal control and identification functionality. RTP and RTCP are designed to be independent of the underlying transport and network layers. The protocol supports the use of RTP-level translators and mixers.


The current RTP RFC is 3550, dated July 2003. This obsoleted RFC 1889.

Protocol dependencies

Example traffic

Screen shot of a RTP frame from SampleCaptures file: rtp_example.raw.gz



The RTP dissector is functional. There are detailed RTP_statistics available.

Preference Settings

Example capture file

A VoIP sample capture of a H323 call (including H225, H245, RTP and RTCP): SampleCaptures/rtp_example.raw.gz

Display Filter

A complete list of RTP display filter fields can be found in the display filter reference

Capture Filter

You cannot directly filter RTP protocols while capturing. However, if you know the UDP port used (see above), you can filter on that one.

Extracting Sound files

You can extract sound files. See RTP_statistics


RTP (last edited 2008-10-26 11:55:20 by JaapKeuter)