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OSPF NSSA scenario problem..

I have 3 site locations (siteA,SiteB,SiteC),each having 2 routers and 2 switches.all the site are interconnected with ospf point to point links .

the switches are connected to routers in nssa areas .

The issue im facing is that sitting on any Site router im not able to ping other router of same location .while from switches in can access whole networks:

below is the configuration of my single site ...all are configured as same ...

OSPF at Routers

router ospf 1

router-id 250.0.0.3

log-adjacency-changes

area 0 authentication message-digest

area 1 authentication message-digest

area 1 nssa

network 172.16.0.10 0.0.0.0 area 1

network 172.16.0.14 0.0.0.0 area 1

network 172.16.0.252 0.0.0.0 area 1

network 172.31.0.6 0.0.0.0 area 0

network 172.31.0.240 0.0.0.0 area 0

network 172.31.0.30 0.0.0.0 area 0

network 172.31.0.34 0.0.0.0 area 0

network 172.31.0.38 0.0.0.0 area 0

network 172.31.0.42 0.0.0.0 area 0

area 1 range 172.16.0.0 255.255.0.0 advertize

OSPF at switches

router ospf 1

router-id 250.0.0.1

log-adjancency-changes

area 1 authentication message-digest

area 1 nssa

redistribute connected subnet

network 172.16.0.1 0.0.0.0 area 1

network 172.16.0.5 0.0.0.0 area 1

network 172.16.0.13 0.0.0.0 area 1

network 172.16.0.250 0.0.0.0 area 1

Kindly suggest and help..

thanks in advance..

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