agentOspfDefaultInfoOriginateAlways 1.3.6.1.4.1.4526.10.2.4.4

When this flag is true, the router advertises 0.0.0.0/0.0.0.0 always. Without this option, OSPF will only advertise 0.0.0.0/0.0.0.0 if the router's forwarding table contains a default route.