Let,s see about the Default routes are used to direct packets addressed to networks not explicitly listed in the routing table. Default routes are invaluable in topologies where learning all the more specific networks is not desirable, as in case of ...
http://www.ebrahma.com/2013/10/how-to-propagating-a-default-route-ospf/Labels: default-information-originate, information-originate, OSPF, Propagating-a-Default-Route, Propagating-a-Default-Route-OSPF, static-default-route, stub-networks