Guidelines for Adding Congestion Notification to Protocols that Encapsulate IP

Document Type Expired Internet-Draft (tsvwg WG)
Authors Bob Briscoe  , John Kaippallimalil  , Patricia Thaler 
Last updated 2019-11-21 (latest revision 2019-05-20)
Replaces draft-briscoe-tsvwg-ecn-encap-guidelines
Stream IETF
Intended RFC status (None)
Expired & archived
pdf htmlized (tools) htmlized bibtex
Stream WG state WG Document (wg milestone: Nov 2020 - Submit 'Guidelines f... )
Document shepherd David Black
IESG IESG state Expired
Consensus Boilerplate Unknown
Telechat date
Responsible AD (None)
Send notices to "David Black" <>

This Internet-Draft is no longer active.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


The purpose of this document is to guide the design of congestion notification in any lower layer or tunnelling protocol that encapsulates IP. The aim is for explicit congestion signals to propagate consistently from lower layer protocols into IP. Then the IP internetwork layer can act as a portability layer to carry congestion notification from non-IP-aware congested nodes up to the transport layer (L4). Following these guidelines should assure interworking among IP layer and lower layer congestion notification mechanisms, whether specified by the IETF or other standards bodies. This document updates the advice to subnetwork designers about ECN in RFC 3819.


Bob Briscoe (
John Kaippallimalil (
Patricia Thaler (unknown-email-Patricia-Thaler)

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