Webospf stub area and totally stubby area. if we make area 1 stub area , R2 will prevent type 5 and type 4 to injected into area 1 . instead R2 abr will inject default route O IA 0.0.0.0 into area 1 .but R2 will still adv all routes inside area 0 into area 1 as O IA routes. WebAn NSSA is defined as an OSPF area where the ABR disallows Type 5 external LSAs while allowing the existence of an Autonomous System Border Router (ASBR). This allowance makes such an area “not as stubby” as a stub area or a totally stub area both of which have additional restrictions.

OSPF Areas: Not-So-Stubby Area (NSSA) – Sassenach Learns

WebJan 2, 2011 · An area qualifies as stub or totally stubby when it meets the following criteria: There is a single exit point from that area. The area is not needed as a transit area for virtual links. No ASBR is internal to the stub … WebThis type of stubby area is the same as stub area with one exception that you can have an ASBR within the area. Of course, you may wonder how this is possible because we are … metal cabinet with sliding glass doors

OSPF NSSA (Not So Stubby) Area - NetworkLessons.com

WebJun 12, 2014 · Basically if you are going to configure an ospf area as a stub and prohibit E1/E2 routes which will shrink the opsf database, Then why not go further and make it a … Let me give you an overview of the different stub areas: Let’s start with a nice topology with five areas. In the middle, you’ll find the backbone area, and the other areas are configured as different stub area types. If you configure an area as a stub it will block all type 5 external LSAs. WebYour ABR should generate a 0/0 route as a Type 3 (summary). This is the ONLY summary that's allowed in the totally stubby area. So yes, you'll still have full reachability. And as Ryan said, stub, total stub, and total not-so-stubby will all automagically produce a 0/0 route. NSSA will not unless you manually specify it on the ABR. Scott how the cpp was formed