If the local device clock is faster than usual and the aging timer expires abnormally, the local device will clear all Router LSAs from the neighboring device, causing route flapping and service interruptions. To resolve this issue, a device automatically triggers active/standby switchover upon abnormal OSPF LSA aging. Active/standby board switchover 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 here are those sent by the neighboring device to the local device.)
To disable the function of triggering active/standby board switchover upon abnormal OSPF LSA aging, run the ospf maxage-lsa auto-protect disable command.