<?xml version='1.0'?>

<reference anchor='RFC2597'>

<front>
<title>Assured Forwarding PHB Group</title>
<author initials='J.' surname='Heinanen' fullname='Juha Heinanen'>
<organization>Telia Finland</organization>
<address>
<postal>
<street>Myyrmaentie 2</street>
<city>Vantaa</city>
<code>01600</code>
<country>FI</country></postal>
<email>jh@telia.fi</email></address></author>
<author initials='F.' surname='Baker' fullname='Fred Baker'>
<organization>Cisco Systems</organization>
<address>
<postal>
<street>519 Lado Drive</street>
<city>Santa Barbara</city>
<region>CA</region>
<code>93111</code>
<country>US</country></postal>
<email>fred@cisco.com</email></address></author>
<author initials='W.' surname='Weiss' fullname='Walter Weiss'>
<organization>Lucent Technologies</organization>
<address>
<postal>
<street>300 Baker Avenue</street>
<street>Suite 100</street>
<city>Concord</city>
<region>MA</region>
<code>01742-2168</code>
<country>US</country></postal>
<email>wweiss@lucent.com</email></address></author>
<author initials='J.' surname='Wroclawski' fullname='J. Wroclawski'>
<organization>MIT Laboratory for Computer Science</organization>
<address>
<postal>
<street>545 Technology Square</street>
<city>Cambridge</city>
<region>MA</region>
<code>02139</code>
<country>US</country></postal>
<email>jtw@lcs.mit.edu</email></address></author>
<date month='June' year='1999' />
<abstract>
<t>This document defines a general useDifferentiated Services (DS)Per-Hop-Behavior (PHB) Group called Assured Forwarding (AF).
The AF PHB group provides delivery of IP packets in four
independently forwarded AF classes.
Within each AF class, an IP
packet can be assigned one of three different levels of drop
precedence.
A DS node does not reorder IP packets of the same
microflow if they belong to the same AF class.</t></abstract></front>

<seriesInfo name='RFC' value='2597' />
</reference>
