Compatible Version Negotiation for QUIC

Document Type Replaced Internet-Draft (quic WG)
Authors David Schinazi  , Eric Rescorla 
Last updated 2020-02-26 (latest revision 2019-11-04)
Replaced by draft-ietf-quic-version-negotiation
Stream IETF
Intended RFC status Proposed Standard
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream WG state WG Document
Document shepherd No shepherd assigned
IESG IESG state Replaced by draft-ietf-quic-version-negotiation
Consensus Boilerplate Yes
Telechat date
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active.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


QUIC does not provide a complete version negotiation mechanism but instead only provides a way for the server to indicate that the version the client offered is unacceptable. This document describes a version negotiation mechanism that allows a client and server to select a mutually supported version. Optionally, if the original and negotiated version share a compatible Initial format, the negotiation can take place without incurring an extra round trip. Discussion of this work is encouraged to happen on the QUIC IETF mailing list [1] or on the GitHub repository which contains the draft: version-negotiation [2].


David Schinazi (
Eric Rescorla (

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