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

Current configuration : 209 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
 ip igmp join-group 224.4.4.4
 duplex auto
 speed auto
end