The DCCP Service Code

Document Type Replaced Internet-Draft (individual in tsv area)
Last updated 2015-10-14 (latest revision 2007-06-20)
Replaced by draft-ietf-dccp-serv-codes
Stream IETF
Intended RFC status (None)
Expired & archived
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Stream WG state (None)
Document shepherd No shepherd assigned
IESG IESG state Replaced by draft-ietf-dccp-serv-codes
Telechat date
Responsible AD Lars Eggert
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document describes the usage of Service Codes by the Datagram Congestion Control Protocol, RFC 4340. Service Codes provide a method to identify the intended service/application to process a DCCP Connection Request. This provides improved flexibility in the use and assignment of port numbers for connection multiplexing. The DCCP Service Code can also enable more explicit coordination of services behind NATs and firewalls. This document motivates the setting of Service Codes by applications, rather than assigning a default Service Code value of zero.


Gorry Fairhurst (

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