Making Route Flap Damping Usable

Cristel Pelsser , Randy Bush , Keyur Patel , Prodosh Mohapatra and Olaf Maennel

RFC May 2014
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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.

Publication Details

Publication Type
Miscellaneous
Publication Date
May 2014
Published In
RFC
Volume & Issue
No. 7196
Publisher
RFC Editor
Digital Object Identifier (DOI)
10.17487/RFC7196

Suggested citation

Cristel Pelsser, Randy Bush, Keyur Patel, Prodosh Mohapatra, and Olaf Maennel. 2014. Making Route Flap Damping Usable. RFC 7196 (May 2014). https://doi.org/10.17487/RFC7196

BibTeX Citation

@misc{Pelsser2014,
	title        = {Making Route Flap Damping Usable},
	author       = {Cristel Pelsser and Randy Bush and Keyur Patel and Prodosh Mohapatra and Olaf Maennel},
	year         = 2014,
	month        = may,
	journal      = {RFC},
	publisher    = {RFC Editor},
	series       = {Request for Comments},
	number       = 7196,
	doi          = {10.17487/RFC7196},
	url          = {https://rfc-editor.org/rfc/rfc7196.txt},
	howpublished = {RFC 7196},
	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.},
	groups       = {RFCs},
	keywords     = {BGP, Route Flap Damping, Route Damping},
	pagetotal    = 8
}

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