Hello!

My question is regarding the OSPF Lab: 

NSSA ABR External Prefix Filtering

The problem is: Configure summarization on R5 so that devices outside of area 3 do not have a route for R10's Loopback100.

This basically means we want to configure the ABR to not set the p-bit (no type 7 to type 5 translation).

The solution provided is: "summary-address 160.1.10.10 255.255.255.255 not-advertise"

I used "summary-address 160.1.10.10 255.255.255.255 nssa-only" instead...which did work.  Prior to the summary-address other areas are learning the external route.  After....only routers in the area configured are learning the route.

Thoughts?