Link-based failure detection is always enabled, provided that the interface supports this type of failure detection. The following Sun network drivers are supported in the current release of Oracle Solaris:
To determine whether a third-party interface supports link-based failure detection, refer to the manufacturer's documentation.
These network interface drivers monitor the interface's link state and notify the networking subsystem when that link state changes. When notified of a change, the networking subsystem either sets or clears the RUNNING flag for that interface, as appropriate. When the daemon detects that the interface's RUNNING flag has been cleared, the daemon immediately fails the interface.