R1

show ip ospf interface fastethernet0/0


R2

debug ip ospf hello


R1

conf t
interface fastethernet0/0
ip ospf priority 0
!
show ip ospf interface fastethernet0/0


R2

un all

show ip ospf interface fastethernet0/0
!
conf t
interface fastethernet0/0
ip ospf priority 255
!
show ip ospf interface fastethernet0/0