Suppression logic:

Suppression logic operates under these conditions:

• If the new and current best paths are identical up to the decision point where tie-breakers (such as router ID) apply, BGP may retain the current best path to prevent route instability.

• Suppression generally applies only when both routes are learned from external peers and their routing attributes are otherwise equivalent.

Configuration note:

• Suppression can be disabled with the bgp bestpath compare-routerid command. When this command is used, any change in route attributes triggers a new best path selection.