Back-off SPF algorithm for link state IGP

Document Type Replaced Internet-Draft (individual)
Author Bruno Decraene 
Last updated 2015-09-10 (latest revision 2015-03-09)
Replaced by RFC 8405
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Expired & archived
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IESG IESG state Replaced by draft-ietf-rtgwg-backoff-algo
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This Internet-Draft is no longer active. A copy of the expired Internet-Draft can be found at


This document defines a standard algorithm to back-off link-state IGP SPF computations. Having one standardized algorithm improves interoperability by reducing the probability and/or duration of transient forwarding loops during the IGP convergence in the area/level when the network reacts to multiple consecutive events.


Bruno Decraene (

(Note: The e-mail addresses provided for the authors of this Internet-Draft may no longer be valid.)