A Taxonomy on Private Use Fields in Protocols

Document Type Expired Internet-Draft (individual)
Last updated 2018-07-02 (latest revision 2017-12-29)
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document attempts to provide some clarification for the way that private use fields have been used in protocols developed in the IETF. It is strictly a taxonomy of what has been published and offers no advice about how to design or use private use options.


Chris Lonvick (lonvick.ietf@gmail.com)

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