There are three routers with router id 18.104.22.168 , 22.214.171.124 , 126.96.36.199.
188.8.131.52 is configured as NSSA ABR/ASBR and both 184.108.40.206 , 220.127.116.11 are connected with 18.104.22.168 thru serial link.
I am originating default route for this nssa in 22.214.171.124.
126.96.36.199 is receiving the default from 188.8.131.52 as type 7 LSA with forwarding address as 10.1.1.1 and is installing the default route in the IP Routing table.
184.108.40.206 is also receiving the default from 220.127.116.11 as type 7 LSA with forwarding address as 10.1.1.1 and is not installing the default route in IP Routing table.
18.104.22.168 is recieving the prefix 10.1.1.1/32 as a Type 7 LSA from 22.214.171.124.
If i block the redistribution of 10.1.1.1/32 from 126.96.36.199 , 188.8.131.52 learning the route 10.1.1.0/30 as Intra area route and the default route is also getting installed in the routing table.
Can anyone explain the reason for the above.
Attached the Diagram also.
I am unable to view your topology attachment. Is 184.108.40.206 advertising 10.1.1.1/32 as type 7 LSA to 220.127.116.11. If it is, why is 18.104.22.168 not learning the same LSA from 22.214.171.124. Aren't those two routers directly connected to 126.96.36.199 via serial interface and part of the same NSSA area.