Network Sensitivity to Intradomain Routing Changes

Renata Teixeira

University of California, San Diego


In a large transit IP network, hosts outside the network originate and consume most of the traffic. This implies that the network performance and robustness is determined by both intradomain and interdomain routing. Despite the architecture separation between these two classes of routing protocols in the Internet, intradomain protocols do influence the path-selection process in the Border Gateway Protocol (BGP). When there are multiple (equally good) BGP routes available for a given destination, BGP selects the route associated with the closest egress point based upon intradomain path costs. Under such hot-potato routing, BGP-level routes to destinations that connect to the network in multiple points (such as multi-homed customers and destinations learned from peers) may change because of intradomain routing changes.

More info on this work can be found at:

[Renata Teixeira]
[University of California, San Diego]