A Common API for Transparent Hybrid Multicast

Document Type Replaced Internet-Draft (individual)
Last updated 2011-03-11 (latest revision 2011-03-07)
Replaced by draft-irtf-samrg-common-api
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Group communication services exist in a large variety of flavors, and technical implementations at different protocol layers. Multicast data distribution is most efficiently performed on the lowest available layer, but a heterogeneous deployment status of multicast technologies throughout the Internet requires an adaptive service binding at runtime. Today, it is difficult to write an application that runs everywhere and at the same time makes use of the most efficient multicast service available in the network. Facing robustness requirements, developers are frequently forced to using a stable, upper layer protocol controlled by the application itself. This document describes a common multicast API that is suitable for transparent communication in underlay and overlay, and grants access to the different multicast flavors. It proposes an abstract naming by multicast URIs and discusses mapping mechanisms between different namespaces and distribution technologies. Additionally, it describes the application of this API for building gateways that interconnect current multicast domains throughout the Internet.


Matthias Waehlisch (mw@link-lab.net)
Thomas Schmidt (Schmidt@informatik.haw-hamburg.de)
Stig Venaas (stig@cisco.com)

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