NDLI: A case for using service availability to characterize IP backbone topologies

Content Provider	IEEE Xplore Digital Library
Author	Keralapura, Ram Moerschell, Adam Chuah, Chen-Nee Iannaccone, Gianluca Bhattacharyya, Supratik
Copyright Year	2011
Abstract	Traditional service-level agreements (SLAs), defined by average delay or packet loss, often camouflage the instantaneous performance perceived by end-users. We define a set of metrics for service availability to quantify the performance of Internet protocol (IP) backbone networks and capture the impact of routing dynamics on packet forwarding. Given a network topology and its link weights, we propose a novel technique to compute the associated service availability by taking into account transient routing dynamics and operational conditions, such as border gateway protocol (BGP) table size and traffic distributions. Even though there are numerous models for characterizing topologies, none of them provide insights on the expected performance perceived by end customers. Our simulations show that the amount of service disruption experienced by similar networks (i.e., with similar intrinsic properties such as average out-degree or network diameter) could be significantly different, making it imperative to use new metrics for characterizing networks. In the second part of the paper, we derive goodness factors based on service availability viewed from three perspectives: Ingress node (from one node to many destinations), link (traffic traversing a link), and network-wide (across all source-destination pairs). We show how goodness factors can be used in various applications and describe our numerical results.
Starting Page	241
Ending Page	252
Page Count	12
File Size	1234058
File Format	PDF
ISSN	12292370
Volume Number	8
Issue Number	2
Language	English
Publisher	Editorial Department of Journal of Communications and Networks
Publisher Date	2006-06-01
Publisher Place	South Korea
Access Restriction	Subscribed
Rights Holder	JCN
Subject Keyword	Routing Availability Peer to peer computing Delay Network topology Convergence service availability in IP networks Interior gateway protocol (IGP) routing dynamics Internet protocol (IP) network goodness
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Information Systems

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