A model of BGP routing for network engineering
Proceedings of the joint international conference on Measurement and modeling of computer systems
Routing design in operational networks: a look from the inside
Proceedings of the 2004 conference on Applications, technologies, architectures, and protocols for computer communications
Detecting BGP configuration faults with static analysis
NSDI'05 Proceedings of the 2nd conference on Symposium on Networked Systems Design & Implementation - Volume 2
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Routing policy configuration is a very important aspect of network operations because it affects the network's profit, performance and security. Network operators implement low-level routing policies according to their high-level objectives. In this paper, we propose a set of techniques for analyzing network-wide routing policies. First, we interpret the routing policies relevant to a single neighbor. Then, we classify all neighbors into groups which express common intent. Classification is done by generating and comparing update patterns. We validate our approach by experimenting with the router configuration files of a Tier-1 ISP. Our techniques classify neighbors according to their type (customer/peer/transit), highlight neighbors which deviate from the norm and reveal possible mistakes. Consequently, our network-wide analysis seems to be promising for automating the translation of routing policy configuration into initial intent.