I need a detailed example where i would use the nssa area in ospf. Here are some conclusions that i know, put me right if am off the mark :
a) A nssa area will give benefits of stub area and totally stub area, but will allow the use of an ASBR which is not the case for stub and totally stuby. If i dont want external non Ospf Routes and Summary routes why would i need a router to be an ASBR ?? My conclusion was maybe if i need an Internet EBGP connection, which will in turn make the Router an ASBR, right ? BUT, to make this internet EBGP connection to work, i will need to put a static route to the EBGP peer, right ? Again, as i said, put me right if am wrong .
My question is, in which situation would i need a NSSA area ?
Thanks in Advance