No, the split horizon rule runs in EIGRP, RIP to prevent routing loops - preventing the route it learned through one interface and advertising back out the same interface. OSPF is a link state protocol working out the topology by building the shortest path tree, so split horizon rule does not count in OSPF.
With the default-information originate command the router must know its own default route already to be able to advertise this default route, it generates a type 5 LSA in to the ospf database. However, if you want to forcefully advertise the default route, without containing a default route in the routing table, then have the 'always' key word.
router ospf 1
default-information originate always
Hope this helps
http://www.cisco.com/en/US/tech/tk365/technologies_configuration_example09186a00801ec9f0.shtml
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Please rate useful posts & remember to mark any solved questions as answered. Thank you.
