event dampening--The process in which a router dampens a flapping interface from the perspective of the routing tables and routing protocols of IP and CLNS by filtering the excessive route adjust message because of the interface state change.
flap--Rapid interface state changes from up to down and down to up within a short period of time.
half life--The rate of the exponential decay of the accumulated penalty is determined by this value.
maximum penalty--The maximum value beyond which the penalty assigned does not increase. It is derived from the maximum suppress time.
maximum suppress time--The maximum amount of time the interface can stay suppressed at the time a penalty is assigned.
penalty--A value assigned to an interface when it flaps. This value increases with each flap and decreases over time. The rate at which it decreases depends on the half life.
--The threshold value after which the interface will be unsuppressed and can be used again.
suppress threshold--Value of the accumulated penalty that triggers the router to dampen a flapping interface. When the accumulated penalty exceeds this value, the interface state is considered to be down from the perspective of the routing protocol.
suppressed--Suppressing an interface removes an interface from the network from the perspective of the routing protocol. An interface enters the suppressed state when it has flapped frequently enough for the penalty assigned to it to cross a threshold limit.