R1(config-if)#do sh run | b interface Ethernet0/1
interface Ethernet0/1
 ip address 17.100.1.1 255.255.255.240
 ip access-group 2 out
 ip pim sparse-dense-mode
 half-duplex
 no keepalive
!
!
access-list 1 deny   224.20.73.1 15.128.20.0
access-list 1 permit any
access-list 2 deny   224.0.0.0 15.255.255.255
access-list 2 permit any