Major new router platforms support fast IP-level failure protection based on LFA. But LFA usually cannot protect against all possible failure scenarios. This paper shows how a deliberate selection of IGP link costs can bring many networks close to complete LFA-based protection.
Authors

Gábor Rétvári, Levente Csikor, János Tapolcai, Gábor Enyedi, András Császár

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Optimizing IGP Link Costs for Improving IP-level Resilience

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