“Optimal Routing Design” from Cisco Press, page 160:
“With the totally stubby not really full area (TSNRFA), you find that the ABR translates Type 5 LSAs from within the area into Type 7 LSAs, as long as no overlapping Type 3 is in its local database. The ABR floods Type 1 and Type 2 LSAs into area 0, unless the network administrator has configured the “really stubby” option.
Actually, this type of area is made up. It does not exist. The authors just thought you might need a break after wading through all the real stub area types.”
