A New Internet-Draft is available from the on-line Internet-Drafts directories. This draft is a work item of the Congestion and Pre-Congestion Notification Working Group of the IETF.
Title : Encoding 3 PCN-States in the IP header using a single DSCP
Author(s) : Bob Briscoe
Toby Moncaster
Michael Menth
Filename : draft-ietf-pcn-3-in-1-encoding-07.txt
Pages : 23
Date : 2011-07-30
The objective of Pre-Congestion Notification (PCN) is to protect the
quality of service (QoS) of inelastic flows within a Diffserv domain.
The overall rate of the PCN-traffic is metered on every link in the
PCN domain, and PCN-packets are appropriately marked when certain
configured rates are exceeded. Egress nodes pass information about
these PCN-marks to decision points which then decide whether to admit
or block new flow requests or to terminate some already-admitted
flows during serious pre-congestion.
This document specifies how PCN-marks are to be encoded into the IP
header by re-using the Explicit Congestion Notification (ECN)
codepoints within a PCN-domain. This encoding provides for up to
three different PCN marking states using a single DSCP: not-marked
(NM), threshold-marked (ThM) and excess-traffic-marked (ETM). Hence,
it is called the 3-in-1 PCN encoding. This document obsoletes
RFC5696.
A URL for this Internet-Draft is:
http://www.ietf.org/internet-drafts/draft-ietf-pcn-3-in-1-encoding-07.txt
Internet-Drafts are also available by anonymous FTP at:
ftp://ftp.ietf.org/internet-drafts/
This Internet-Draft can be retrieved at:
ftp://ftp.ietf.org/internet-drafts/draft-ietf-pcn-3-in-1-encoding-07.txt
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