R3#sh run int fa 0/1
Building configuration...

Current configuration : 171 bytes
!
interface FastEthernet0/1
 ip address 180.40.7.129 255.255.255.224
 ip pim state-refresh origination-interval 88
 ip pim sparse-dense-mode
 duplex auto
 speed auto
end

R3#

R4#sh run  int fa 0/0
Building configuration...

Current configuration : 179 bytes
!
interface FastEthernet0/0
 ip address 180.40.7.130 255.255.255.224
 ip nat inside
 ip pim state-refresh origination-interval 88
 ip pim dense-mode
 duplex auto
 speed auto
end

R4#