Tidbit of the day: NSSA – External forwarding address.


I wanted to share a very interesting tidbit i figured out the hard way. Again, its about NSSA areas in OSPF. When redistributing a route into an NSSA area, how is the forwarding address chosen? Some say the lowest IP address of any loopback interfaces thats advertised into the NSSA area.
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OSPF – External routes Part 3: Type 7’s in single NSSA area.


Welcome back to part 3 about OSPF and external routes. In this post I will focus on type 7 LSA’s. These are LSA’s thats created within an NSSA area. An NSSA area is, as you may know, an area which is meant as a stub area (no type 4 and 5’s), but will still allow for external routes to be introduced in the area.
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