The suppress-flapping peer disable command disables OSPF neighbor relationship flapping suppression globally.
The undo suppress-flapping peer disable command enables OSPF neighbor relationship flapping suppression globally.
By default, OSPF neighbor relationship flapping suppression is enabled globally.
If an OSPF interface alternates between Up and Down, OSPF neighbor relationship flapping occurs on the interface. During the flapping, OSPF frequently sends Hello packets to reestablish the neighbor relationship, synchronizes LSDBs, and recalculates routes. In this process, a large number of packets are exchanged, adversely affecting neighbor relationship stability, OSPF services, and other OSPF-dependent services, such as LDP and BGP. OSPF neighbor relationship flapping suppression can address this problem by delaying OSPF neighbor relationship reestablishment or preventing service traffic from passing through flapping links.
By default, OSPF neighbor relationship flapping suppression is enabled globally. To disable this function globally, run the suppress-flapping peer disable command.