Localizing Router Configuration Errors Using Minimal Correction Sets
Abstract
Router configuration errors are unfortunately common and difficult to localize using current network verifiers. We introduce a novel configuration error localizer (CEL) that precisely identifies which configuration segments contribute to the violation of forwarding requirements. In particular, CEL generates a system of satisfiability modulo theories (SMT) constraints-which encode a network's configurations, control logic, and forwarding requirements-and uses a domain-specific minimal correction set (MCS) enumeration algorithm to identify problematic configuration segments. CEL efficiently locates several configuration errors in real university networks and identifies all routing-related and at least half of all ACL-related errors we introduce.
Cite
@article{arxiv.2204.10785,
title = {Localizing Router Configuration Errors Using Minimal Correction Sets},
author = {Aaron Gember-Jacobson and Ruchit Shrestha and Xiaolin Sun},
journal= {arXiv preprint arXiv:2204.10785},
year = {2022}
}