Switching White Papers
Impact of Hot-Potato Routing Changes in IP Networks
Overview Despite the architectural separation between intradomain and interdomain routing in the Internet, intradomain protocols do influence the path-selection process in the Border Gateway Protocol (BGP). When choosing between multiple equally-good BGP routes, a router selects the one with the closest egress point, based on the intradomain path cost. Under such hot-potato routing, an intradomain event can trigger BGP routing changes. To characterize the influence of hot-potato routing, they propose a technique for associating BGP routing changes with events visible in the intradomain protocol, and apply their algorithm to a tier-1 ISP backbone network. This paper shows that hot-potato routing changes lead to longer delays in forwarding-plane convergence, shifts in the flow of traffic to neighboring domains, extra externally-visible BGP update messages, and inaccuracies in Internet performance measurements.
| Publisher | Laboratorie d'Informatique de Paris 6 | File Format | |
|---|---|---|---|
| Date Published | October 2007 | ||
| Format | White Papers | ||
| Topics | |||
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