QoS online routing and MPLS multilevel protection: a survey

A survey of MPLS protection methods and their utilization in combination with online routing methods is presented in this article. Usually, fault management methods pre-establish backup paths to recover traffic after a failure. In addition, MPLS allows the creation of different backup types, and hence MPLS is a suitable method to support traffic-engineered networks. In this article, an introduction of several label switch path backup types and their pros and cons are pointed out. The creation of an LSP involves a routing phase, which should include QoS aspects. In a similar way, to achieve a reliable network the LSP backups must also be routed by a QoS routing method. When LSP creation requests arrive one by one (a dynamic network scenario), online routing methods are applied. The relationship between MPLS fault management and QoS online routing methods is unavoidable, in particular during the creation of LSP backups. Both aspects are discussed in this article. Several ideas on how these actual technologies could be applied together are presented and compared.

[1]  E. Calle,et al.  “ A dynamic multilevel MPLS protection domain ” , 2001 .

[2]  Ariel Orda,et al.  QoS Routing Mechanisms and OSPF Extensions , 1999, RFC.

[3]  Murali S. Kodialam,et al.  Dynamic routing of bandwidth guaranteed tunnels with restoration , 2000, Proceedings IEEE INFOCOM 2000. Conference on Computer Communications. Nineteenth Annual Joint Conference of the IEEE Computer and Communications Societies (Cat. No.00CH37064).

[4]  Andreas Kirstädter,et al.  Engineering end-to-end IP resilience using resilience-differentiated QoS , 2002, IEEE Commun. Mag..

[5]  Srinivas V. Makam,et al.  Framework for MPLS - based Recovery , 2000 .

[6]  José-Luis Marzo,et al.  Adding QoS protection in order to enhance MPLS QoS routing , 2003, IEEE International Conference on Communications, 2003. ICC '03..

[7]  Murali S. Kodialam,et al.  Minimum interference routing with applications to MPLS traffic engineering , 2000, Proceedings IEEE INFOCOM 2000. Conference on Computer Communications. Nineteenth Annual Joint Conference of the IEEE Computer and Communications Societies (Cat. No.00CH37064).

[8]  Francois Le Faucheur,et al.  Requirements for support of Diff-Serv-aware MPLS Traffic Engineering , 2000 .

[9]  Subhash Suri,et al.  Profile-Based Routing: A New Framework for MPLS Traffic Engineering , 2001, QofIS.

[10]  T. V. Lakshman,et al.  Restorable dynamic quality of service routing , 2002 .