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A proposal for Backward ECN for the Internet Protocol (IPv4/IPv6)

Document Type Expired Internet-Draft (individual)
Expired & archived
Authors Dr. Biswajit Nandy , Nabil Seddigh , Jamal Hadi Salim
Last updated 1998-06-04
RFC stream (None)
Intended RFC status (None)
Stream Stream state (No stream defined)
Consensus boilerplate Unknown
RFC Editor Note (None)
IESG IESG state Expired
Telechat date (None)
Responsible AD (None)
Send notices to (None)

This Internet-Draft is no longer active. A copy of the expired Internet-Draft is available in these formats:


This memo proposes an alternative approach to the current ECN mechanism as proposed in the internet draft [draft-kksjf]. A Backward-ECN(BECN) is proposed which uses the existing IP signalling mechanism, the Internet Control Messaging Protocol (ICMP) [RFC 792] Source Quench message. The use of ICMP Source Quench (ISQ) allows a basic ECN mechanism for IP which does not require any negotiation between end systems. Congestion notification is kept at the network(IP) level. The congestion state can be reflected up to the transport layer (e.g. TCP or UDP) for appropriate action. The ISQ based approach reduces the reaction time to a congestion in the network. In addition, the ISQ message can include information on the severity of the congestion allowing the end host to react accordingly so as to make maximal use of the resources while maintaining network equilibrium.


Dr. Biswajit Nandy
Nabil Seddigh
Jamal Hadi Salim

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