[c-nsp] Delayed IGP default-originate?

[Kevin Graham]

Similar to Gert's question on on delayed eBGP startup, is there a good way
to delay IGP default-route generation?

Since our DFZ routers have a 0/0 nailed down to Null0, OSPF begins
generating the default right away, irrespective of BGP state (namely
before the router is actually prepared to handle default-routed traffic).
A delayed startup for OSPF doesn't work, since that same instance would be
needed to find iBGP loopbacks.

A route-map matching a "default-network" is the only thing that comes to
mind, though designating a magic prefix for this seems broken.

I don't believe there's a formal BGP state for "done w/ inital UPDATE
churn", but presumably this is where both the eBGP-startup and IGP-default
originate would ideally trigger.