Making Route Flap Damping Usable
RFC 7196, “Making Route Flap Damping Usable”, is a Proposed Standard document published in May 2014 by C. Pelsser, R. Bush, K. Patel, P. Mohapatra, O. Maennel. The canonical text is published by the RFC Editor.
Abstract
Route Flap Damping (RFD) was first proposed to reduce BGP churn in routers. Unfortunately, RFD was found to severely penalize sites for being well connected because topological richness amplifies the number of update messages exchanged. Many operators have turned RFD off. Based on experimental measurement, this document recommends adjusting a few RFD algorithmic constants and limits in order to reduce the high risks with RFD. The result is damping a non-trivial amount of long-term churn without penalizing well-behaved prefixes' normal convergence process.
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 7196 is hosted at rfc-editor.org. Available in TXT,HTML.
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