Monthly Archives: December 2016

BGP dampening

Is an evil! But 😉


Formula (Really Madly Hate! 😉

max-penalty = reuse-limit * 2 (max-suppress-time / half-life )


bgp dampening half-life reuse-limit suppress-limit maximum-suppress-time

The default penalty increase for a route flap is 1000. If the route attributes are the only change, the penalty increase is 500. This value is hard-coded.
The penalty on the route is reduced every 5 seconds.
The router checks for prefixes to unsuppress every 10 seconds.

bgp dampening 15 750 2000 60
(max penalty = 6000)