Long-term Viability of Protocol Extension Mechanisms

Document Type Expired Internet-Draft (iab)
Author Martin Thomson 
Last updated 2020-02-08 (latest revision 2019-08-07)
Replaces draft-thomson-use-it-or-lose-it
Stream Internet Architecture Board (IAB)
Intended RFC status (None)
Expired & archived
pdf htmlized bibtex
Stream IAB state (None)
Consensus Boilerplate Unknown
RFC Editor Note (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


The ability to change protocols depends on exercising the extension and version negotiation mechanisms that support change. Protocols that don't use these mechanisms can find that deploying changes can be difficult and costly.


Martin Thomson (mt@lowentropy.net)

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