Here is the scenario...

R1, R2, R3, R4.

R1 is an ABR to area 0. R1 is also attached to area 1.

R2 is an internal router to area 1

R3 is an ABR to area 1 and area 2. Since area 2 is not

attached directly to area 0, area 1 is a transit area,

and there is a virtual link between R1 and R3.

R4 is an internal router to area 2

OSPF has synchornised, all routes are available every

where.

Now area 2 should not get any external route. So area

2 was configured as a stub area. Now the requirement

is, that the ethernet of R4 (x.x.x.x) should be

advertised into OSPF without using network statement.

So I used redistribute command in R4. But since area

2 is a stub area, this is not possible. So inorder to

use redistribute command on R4, area 2 was configured

as NSSA.

R4 gives this route to R3. R3 has this route as ON2.

Now this route should have been converted as type 5

LSA and should appear in R2 and R1. But the route

never appears even in database of R2 and R1.

Looks like, NSSA routes are not converted into Type 5

lsas and exchanged to routers which are in a transit

area.

Please input your valuable comments!

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