Service Availability in IP Networks

Recent studies reveal that Internet backbones are capable of providing very low loss rates and end-to-end delays close to the speed of light (in optical fiber). However link failures may lead to packet losses, delay variations and outages due to missing or inconsistent forwarding information in routers. Link failures occur everyday, and may ultimately affect the quality of service experienced by an ISP’s customers. On the other hand, not all link failures impact customer service. Therefore we advocate the need for a new metric to characterize IP service availability in the presence of link failures. We analyze the various factors affecting service availability in IP networks, and explore how to define this metric.

[1]  D. Richard Kuhn,et al.  Sources of Failure in the Public Switched Telephone Network , 1997, Computer.

[2]  Christophe Diot,et al.  Network availability based service differentiation , 2003, IWQoS'03.

[3]  Luca Valcarenghi,et al.  IP restoration vs. WDM protection: is there an optimal choice? , 2000, IEEE Netw..

[4]  David R. Oran,et al.  OSI IS-IS Intra-domain Routing Protocol , 1990, RFC.

[5]  Athina Markopoulou,et al.  Characterization of failures in an IP backbone , 2004, IEEE INFOCOM 2004.

[6]  Renata Teixeira,et al.  General Terms Measurement , 2022 .

[7]  John W. Stewart,et al.  BGP4 : inter-domain routing in the Internet , 1998 .

[8]  Christophe Diot,et al.  Impact of link failures on VoIP performance , 2002, NOSSDAV '02.

[9]  Chen-Nee Chuah,et al.  Analysis of link failures in an IP backbone , 2002, IMW '02.

[10]  Mikkel Thorup,et al.  Optimizing OSPF/IS-IS weights in a changing world , 2002, IEEE J. Sel. Areas Commun..

[11]  Michael Dahlin,et al.  End-to-end WAN service availability , 2001, TNET.

[12]  Christophe Diot,et al.  An approach to alleviate link overload as observed on an IP backbone , 2003, IEEE INFOCOM 2003. Twenty-second Annual Joint Conference of the IEEE Computer and Communications Societies (IEEE Cat. No.03CH37428).

[13]  Chen-Nee Chuah,et al.  Feasibility of IP restoration in a tier 1 backbone , 2004, IEEE Network.

[14]  Antonio Nucci,et al.  Increasing the robustness of IP backbones in the absence of optical level protection , 2003, IEEE INFOCOM 2003. Twenty-second Annual Joint Conference of the IEEE Computer and Communications Societies (IEEE Cat. No.03CH37428).

[15]  Srihari Nelakuditi,et al.  Failure insensitive routing for ensuring service availability , 2003, IWQoS'03.

[16]  Bianca Schroeder,et al.  IGP link weight assignment for transient link failures , 2003 .