Document Type : Review Article

Authors

Isfahan University of Technology

Abstract

The expansion of Internet, increases the number of users and applications. Having higher speed and better quality are the main chalanges of computer network development. Using MPLS and proper traffic design, it is possible to improve the quality of service and reduce the possibility of congestion. It is possible to use MPLS in a BGP/MPLS VPN network for data transmition. In this paper we explain BGP/MPLS VPN and we implement an MPLS network based on Diffserv over VPN services. Using OPNET various senarios are simpulated. In most of the previous proposed systems, with incressing the number of low traffic priority sources like BE and AF, higher priority traffic like EF faces difficulty. Our simulation shows with using traffic engineering, congestion control for low priority sourses and management methods, it is possible to have better quality of services for those traffics which are sensitive to delay.

Keywords

[1] J. Zeng, N. Ansari; “Toward IP Virtual
Private Network Quality of Service: A
Service Provider Perspective”, IEEE
Communication Magazine, IEEE, Vol. 41,
Issue 4, pp. 113-119, April 2003
[2] P. Zhang, R. Kantola; “Building MPLS
VPNs with QoS Routing Capability”,
Interworking, pp. 292-301, 2000.
[3] H. Lee, J. Hwang, B. Kang, K. Jun; “End-To-
End QoS Architecture for VPNs: MPLS
VPN Deployment in a Backbone Network”,
International Workshop on Parallel
Processing, Toronto, Canada, 2000. [4] E. Rosen, A. Viswanathan, R. Callon; “Multi
protocol Label Switching Architecture”,
RFC 3031, January 2001.
[5] E. Rosen, Y. Rekhter; “BGP/MPLS VPNs”,
RFC 2547, October, 2002.
[6] E. C. Rosen, Y. Rekhter; “BGP/MPLS IP
VPNs”, draft-ietf-l3vpnrfc2547bis-01. txt,
September 2003.
[7] B. Davie, Y. Rekhter; “MPLS Technology
and Applications”, Morgan Kaufmann, San
Francisco, CA 2000.
[8] B. Jamoussi, Ed. L. Andersson, R. Callon, R.
Dantu; “Constraint-Based LSP Setup using
LDP” IETF 3212, January 2002.
[9] F. L. Faucheur, T. D. Nadeau, A. Chiu,W.
Townsend, et al; “Extensions to RSVP-TE
and CR-LDP for support of DiffServ-aware
MPLS traffic engineering”, IETF Internet
drafts ,November 2000.
[10] Y. Rekhter, T. Li; “A Border Gateway
Protocol 4 (BGP-4)”, RFC 1771, March
1995.
[11] F. L. Faucheur, B. Davie, S. Davari, P.
Vaananen; “MPLS Support of
Differentiated Services”, RFC 3270, May
2002.
[12] J. Heinanen, F. Baker, W. Weiss, J.
Wroclawski; “Assured Forwarding PHB
Group” IETF RFC 2597.
[13] M. C. Castro, N. A. Nassif, W. C. Borelli;
“QoS Performance Evaluation in
BGP/MPLS VPN”, I2TS', 2003.
[14] S. Álvarez; “QoS for IP/MPLS Networks”,
Cisco Systems Inc,2006.
[15] E. Tsolakou, I. S. Venieris; “Implementation
of Traffic Conditioning and PHB
Mechanisms in OPNET”, 1 Sep 2000.
[16] I. Sh. Hwang, 1B. J. Hwang, Ch. Sh. Ding;
“Adaptive Weighted Fair Queuing with
Priority (AWFQP) Scheduler for Diffserv
Networks” Journal of Informatics &
Electronics, Vol. 2, No. 2, pp. 15-19, March
2008
[17] X. Zeng, C. H. Lung, C. Huang; “A
Bandwidth-efficient Scheduler for MPLS
DiffServ Networks”, The IEEE Computer
Society's 12th Annual International
Symposium, pp. 251-258, 4-8 Oct. 2004.
[18] S. Cnodder, O. Elloumi; “RED behavior with
different packet sizes”, Proceedings of the
Fifth IEEE Symposium on Computers and
Communications, Vol. 3, p.p. 793- 805, July
2000.
[19] Jing-bo XIA, Ming-hui LI, Lu-jun WAN;
“Research on MPLS VPN Networking
Application Based on OPNET”,
International Symposium on Information
Science and Engieering, 2008.
[20] http://www.opnet.com/support/des_model_libr
ary /MPLS.html