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ABSTRACT Network Sensitivity to Hot-Potato Disruptions
BibTeX
@MISC{Teixeira_abstractnetwork,
author = {Renata Teixeira and Aman Shaikh and Tim Griffin and Geoffrey M. Voelker},
title = {ABSTRACT Network Sensitivity to Hot-Potato Disruptions},
year = {}
}
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Abstract
Hot-potato routing is a mechanism employed when there are multiple (equally good) interdomain routes available for a given destination. In this scenario, the Border Gateway Protocol (BGP) selects the interdomain route associated with the closest egress point based upon intradomain path costs. Consequently, intradomain routing changes can impact interdomain routing and cause abrupt swings of external routes, which we call hot-potato disruptions. Recent work has shown that hot-potato disruptions can have a substantial impact on large ISP backbones and thereby jeopardize the network robustness. As a result, there is a need for guidelines and tools to assist in the design of networks that minimize hot-potato disruptions. However, developing these tools is challenging due to the complex and subtle nature of the interactions between exterior and interior routing. In this paper, we address these challenges using an analytic model of hot-potato routing that incorporates metrics to evaluate network sensitivity to hot-potato disruptions. We then present a methodology for computing these metrics using measurements of real ISP networks. We demonstrate the utility of our model by analyzing the sensitivity of a large AS in a tier 1 ISP network.
Keyphrases
hot-potato disruption abstract network sensitivity hot-potato routing network robustness border gateway protocol real isp network subtle nature abrupt swing substantial impact network sensitivity isp network interior routing external route interdomain route intradomain path cost egress point analytic model large isp backbone recent work
