A la carte: Announcing the supported transport protocols via DNS

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Last updated 2010-03-31
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


While TCP has enjoyed many enhancements over the decades, it is useful to allow applications to use new transports, such as SCTP. It is inefficient to naively probe the server using the new transport protocol. This document proposes a new DNS resource record which provides an efficient way to query which protocols are supported by a server. The presence of this record will allow the client to avoid the excessive probing.


Andrew Yourtchenko (ayourtch@cisco.com)
Dan Wing (dwing@cisco.com)

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