This read-write value controls whether directly connected routes on interfaces where OSPF is disabled are redistributed into OSPF as external routes. An admin enables this to advertise reachability to locally attached networks that intentionally don't run OSPF, such as a management LAN, into the OSPF domain. For example, enabling this lets a directly connected management subnet, on an interface with OSPF turned off, still be reachable via routes learned through OSPF elsewhere.