A Rate Adaptive Shaper for Differentiated Services

Tue, 05/26/2020 - 11:09 by Olivier Bonaventure


This memo describes several Rate Adaptive Shapers (RAS) that can be
used in combination with the single rate Three Color Markers (srTCM)
and the two rate Three Color Marker (trTCM) described in RFC2697 and
RFC2698, respectively. These RAS improve the performance of TCP when
a TCM is used at the ingress of a diffserv network by reducing the
burstiness of the traffic. With TCP traffic, this reduction of the
burstiness is accompanied by a reduction of the number of marked
packets and by an improved TCP goodput. The proposed RAS can be used
at the ingress of Diffserv networks providing the Assured Forwarding
Per Hop Behavior (AF PHB). They are especially useful when a TCM is
used to mark traffic composed of a small number of TCP connections.

Olivier Bonaventure and Stefaan De Cnodder
RFC2963, 2000.
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