PCN Encoding for Packet-Specific Dual Marking (PSDM Encoding)

The information below is for an old version of the document
Document Type Expired Internet-Draft (pcn WG)
Last updated 2010-03-05 (latest revision 2009-07-02)
Replaces draft-menth-pcn-psdm-encoding
Stream IETF
Intended RFC status (None)
Expired & archived
pdf htmlized bibtex
Stream WG state WG Document
Document shepherd None
IESG IESG state Expired
Consensus Boilerplate Unknown
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


Pre-congestion notification (PCN) is a link-specific and load- dependent packet re-marking mechanism and provides in Differentiated Services networks feedback to egress nodes about load conditions within the domain. It is used to support admission control and flow termination decision in a simple way. This document proposes how PCN marks can be encoded into the IP header for packet-specific dual marking (PSDM). PSDM encoding provides three different codepoints: not-ETM, not-ThM, and PM. Excess-traffic-marking may re-mark not- ETM-packets to PM and threshold-marking may re-mark not-ThM-packets to PM. Status This memo is posted as an Internet-Draft with an intent to eventually be published as an experimental RFC.


Michael Menth (menth@informatik.uni-wuerzburg.de)
Jozef Babiarz (babiarz@nortel.com)
Moncaster T (toby.moncaster@bt.com)
Bob Briscoe (bob.briscoe@bt.com)

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