A New Internet-Draft is available from the on-line Internet-Drafts directories.
This draft is a work item of the Multiprotocol Label Switching Working Group of the IETF.
Title : "EXP field" renamed to "Traffic Class field"
Author(s) : L. Andersson, R. Asati
Filename : draft-ietf-mpls-cosfield-def-05.txt
Pages : 18
Date : 2008-10-17
The early MPLS documents defined the form of the MPLS Label Stack
entry. This include a three bit field called the "EXP field". The
exact use of this field was not defined by these documents, except to
state that it was to be "reserved for experimental use".
Although the intended use of the EXP field was as a "Class of
Service" field, it was not named the "Class of Service" (CoS) field
by these early documents because the use of such a CoS field was not
considered to be sufficiently defined. Today a number of standards
documents define its usage as a CoS field. .
To avoid misunderstanding about how this field may be used, it has
become increasingly necessary to rename this field. This document
changes the name of the field to the "Traffic Class field" ("TC
field".) In doing so it also updates documents that define the
current use of the EXP this field.
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