Making IP Traffic Engineering Robust to Intra-And Inter-AS Transient Link Failures

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Executive Summary

Intra- and inter-AS transient link failures are common in operational IP networks. Robust intra- and inter-AS Traffic Engineering (TE) schemes have been proposed to optimize network performance against transient link failures. The existing literature has focused solely on either intra- or inter-AS link failure. They have, however, neglected the interactions between robust intra- and inter-AS TE, specifically the impact of intra-AS link failure on inter-AS TE and vice versa. As a result, the overall network performance may not be truly robust to link failures if the interactions are neglected.

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