Dampening
A route can only be suppressed when receiving an advertisement.
Not when receiving a WITHDRAW.
Attribute changes count as a flap (1/2).
In order for a route to be suppressed the following must be true:
The penalty must be greater than the suppress-limit
An advertisement for the route must be received while the penalty is greater than the suppress-limit
A route will not automatically be suppressed if the suppress-limit is 1000 and the penalty reaches 1200. The route will only be suppressed if an advertisement is received while the penalty is decaying from 1200 down to 1000.