Hi Surya,
you can do it based on what up want to be redistributed
1- all connected interfaces
redistributed connected subnest
2- only one interface such as loopack0
route-map map1
match interface loopback 0
router ospf x
redistribute connected submets route-map map1
3- redistribute more than one interface such as loopback0 and fa0/1
route-map map1
match interface loopback0 fastethernet0/1
router ospf x
redistribute connected subnets route-map map1
hope this help
if helpful Rate