Shortest Path First Back-Off Delay Algorithm for Link-State IGPs
RFC 8405, “Shortest Path First Back-Off Delay Algorithm for Link-State IGPs”, is a Proposed Standard document published in June 2018 by B. Decraene, S. Litkowski, H. Gredler, A. Lindem, P. Francois, C. Bowers. The canonical text is published by the RFC Editor.
Abstract
This document defines a standard algorithm to temporarily postpone or "back off" link-state IGP Shortest Path First (SPF) computations. This reduces the computational load and churn on IGP nodes when multiple temporally close network events trigger multiple SPF computations.
Having one standard algorithm improves interoperability by reducing the probability and/or duration of transient forwarding loops during the IGP convergence when the IGP reacts to multiple temporally close IGP events.
What “Proposed Standard” means
An entry-level standards-track specification: stable, peer-reviewed and a solid basis for implementation, though it may still evolve before becoming an Internet Standard.
The canonical text of RFC 8405 is hosted at rfc-editor.org. Available in TXT,HTML.
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