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A Per-Domain Behavior for circuit emulation in IP networks

Published: 01 April 2004 Publication History

Abstract

Circuit networks are expensive to build, difficult to operate, fragile, and not easily scalable. Many network operators would like to carry circuit traffic as an overlay on top of an IP network. With higher bandwidths, faster routers, and Differentiated Services [RFC2474, RFC2475] features in routers, this is now possible. In this paper we describe a simple set of mechanisms that are sufficient to allow an IP cloud to carry circuit replacement traffic. Then, using the framework of [RFC3086] for describing a Per-Domain Behavior (PDB), we explain where these mechanisms should be deployed and quantify how they should be configured in order to construct the appropriate edge-to-edge behavior. This "Virtual Wire" (VW) PDB makes it possible to replace dedicated circuits with IP transport. In the process we attempt to lay to rest two pieces of QoS mythology: first that a Diffserv approach requires substantial over-provisioning compared to int-serv, and second that Diffserv quality of service is inherently loose and not quantitative.

References

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{RFC2212} "Specification of a Guaranteed Quality of Service," S. Shenker, C. Partridge, R. Guerin, http://www. ietf.org/rfc/rfc2212.txt, September, 1997.
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{RFC2474} "Definition of the Differentiated Services Field (DS Field) in the IPv4 and IPv6 Headers", K.Nichols, S. Blake, F. Baker, D. Black, http://www.ietf.org/rfc/ rfc2474.txt, December 1998.
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{RFC3086} "Definition of Differentiated Services Per-domain Behaviors and Rules for their Specification", K. Nichols and B. Carpenter, RFC 3086, http://www.ietf.org/rfc/rfc3086.txt, April, 2001.
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{RFC3246} "An Expedited Forwarding PHB", B. Davie, A. Charny, J.C.R. Bennett, K. Benson, J.Y. Le Boudec, W. Courtney, S. Davari, V. Firoiu, D. Stiliadis, http://www.ietf. org/rfc/rfc3246.txt, March, 2002.
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{RFC3248} "A Delay Bound alternative revision of RFC 2598", G. Armitage, B. Carpenter, A. Casati, J. Crowcroft, J. Halpern, B. Kumar, J. Schnizlein, http://www.ietf.org/ rfc/rfc3248.txt, March, 2002.
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  • (2007)Providing Unsignaled Critical Services for a Future Satellite Packet NetworkMILCOM 2007 - IEEE Military Communications Conference10.1109/MILCOM.2007.4455089(1-7)Online publication date: Oct-2007

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Published In

cover image ACM SIGCOMM Computer Communication Review
ACM SIGCOMM Computer Communication Review  Volume 34, Issue 2
April 2004
151 pages
ISSN:0146-4833
DOI:10.1145/997150
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Association for Computing Machinery

New York, NY, United States

Publication History

Published: 01 April 2004
Published in SIGCOMM-CCR Volume 34, Issue 2

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  • (2007)Providing Unsignaled Critical Services for a Future Satellite Packet NetworkMILCOM 2007 - IEEE Military Communications Conference10.1109/MILCOM.2007.4455089(1-7)Online publication date: Oct-2007

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