Duplicating RTP Streams

Document Type Replaced Internet-Draft (individual)
Authors Ali Begen  , Colin Perkins 
Last updated 2012-09-11 (latest revision 2012-03-10)
Replaced by RFC 7198
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Expired & archived
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Stream Stream state (No stream defined)
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IESG IESG state Replaced by draft-ietf-avtext-rtp-duplication
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Packet loss is undesirable for real-time multimedia sessions, but can occur due to congestion, or other unplanned network outages. This is especially true for IP multicast networks, where packet loss patterns can vary greatly between receivers. One technique that can be used to recover from packet loss without incurring unbounded delay for all the receivers is to duplicate the packets and send them in separate redundant streams. This document explains how Real-time Transport Protocol (RTP) streams can be duplicated without breaking RTP media streams, or RTP Control Protocol (RTCP) rules.


Ali Begen (abegen@cisco.com)
Colin Perkins (csp@csperkins.org)

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)