RFC 2698 (rfc2698) - Page 1 of 5
A Two Rate Three Color Marker
Alternative Format: Original Text Document
Network Working Group J. Heinanen
Request for Comments: 2698 Telia Finland
Category: Informational R. Guerin
University of Pennsylvania
September 1999
A Two Rate Three Color Marker
Status of this Memo
This memo provides information for the Internet community. It does
not specify an Internet standard of any kind. Distribution of this
memo is unlimited.
Copyright Notice
Copyright (C) The Internet Society (1999). All Rights Reserved.
Abstract
This document defines a Two Rate Three Color Marker (trTCM), which
can be used as a component in a Diffserv traffic conditioner
[RFC 2475, RFC 2474]. The trTCM meters an IP packet stream and marks
its packets based on two rates, Peak Information Rate (PIR) and
Committed Information Rate (CIR), and their associated burst sizes to
be either green, yellow, or red. A packet is marked red if it
exceeds the PIR. Otherwise it is marked either yellow or green
depending on whether it exceeds or doesn't exceed the CIR.
1. Introduction
The Two Rate Three Color Marker (trTCM) meters an IP packet stream
and marks its packets either green, yellow, or red. A packet is
marked red if it exceeds the Peak Information Rate (PIR). Otherwise
it is marked either yellow or green depending on whether it exceeds
or doesn't exceed the Committed Information Rate (CIR). The trTCM is
useful, for example, for ingress policing of a service, where a peak
rate needs to be enforced separately from a committed rate.
Heinanen & Guerin Informational