Disabling Active/Standby Board Switching Triggered by Abnormal OSPF Aging

When the local device's aging timer expires, the local device incorrectly clears all Router LSAs received from the peer device, which causes large-scale route flapping and service interruptions. To resolve this issue, active/standby board switching triggered by abnormal OSPF aging is automatically enabled. Such switching is triggered to restore network connections and service traffic when the following condition is met:

(Number of incorrectly cleared Router LSAs/Total number of Router LSAs) x 100% ≥ 80% (Router LSAs are those sent by the peer device to the local device)