The status of a network adapter redundancy group changes when at least one adapter in the group is flapping or has a status of down, disabled, not present, or testing.
By default, a value of testing for the network adapter’s status results in a Down notification. You can modify this behavior with the Testing Notification Mode.
In addition, you can create a network adapter redundancy group where the status calculation considers the state of the system containing the adapter. System status is useful when the group's members come from multiple systems. You determine the behavior by the topology you create. When all the network adapters in a group come from the same system, you can make the group PartOf a UnitaryComputerSystem. This prevents the unresponsive status of the system from affecting the status calculation.
The following examples use ASL code fragments to show several different network adapter redundancy groups.