[c-nsp] OSPF NSSA Question

[Terry Baranski]

> > Yeah, I guess that's why I am confused.... why do the routers 
> > in the stub/nssa area need any information other than a default 
> > route?
> 
> They don't but I don't think you can stop them from learning all 
> the routes from their area.  

Right -- this is a fundamental property of link-state protocols.  The
link-state database must be consistent area-wide.

> If you want to be able to pick and choose what they announce 
> and what they receive, use BGP and your choice of 
> prefix-lists/route-maps/distribute-lists, etc.

Agreed.  BGP is well suited for route filtering; IGPs aren't.

-Terry