If a BFD session flaps, an active/standby switchover is frequently performed on the application associated with the BFD session. To prevent the problem, set the WTR time of the BFD session. When the BFD session changes from Down to Up, BFD reports the change to the upper layer application only after the WTR timer times out.
If the WTR time is set, set the same WTR time at both ends. Otherwise, when the BFD session status changes at one end, applications at both ends detect different BFD session statuses.