Route Flap Damping
A large portion of the routing information propagated between BGP speakers on the Internet is the result of unstable or flapping routes. Route flaps continuously ripple through the Internet as a result of up and unstable paths or changes in attributes associated with a given path. These flaps result in wasted CPU, bandwidth and other network resources. RFC 2439, BGP Route Flap Damping, defines a mechanism by which the amount of routing state propagated via BGP can be reduced by reducing the scope of route flap propagation.
Several goals and assumptions are made with regard to route flap damping. One primary goal is that fast convergence must remain possible for normal route changes. The assumption is made that history predicts ...
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