R1#
ip multicast-routing

!
!
interface Ethernet0/0
 ip address 17.57.100.1 255.255.255.0
 ip pim sparse-dense-mode
 half-duplex
!
interface Serial0/0
 no ip address
 encapsulation frame-relay
!
interface Serial0/0.1 point-to-point
 ip address 180.40.7.34 255.255.255.224
 ip pim sparse-dense-mode
 ip ospf network point-to-point
 frame-relay interface-dlci 103
!
interface Serial0/0.2 point-to-point
 ip address 180.40.7.66 255.255.255.224
 ip pim sparse-dense-mode
 ip ospf network point-to-multipoint
 frame-relay interface-dlci 102
!
interface Ethernet0/1
 ip address 17.100.1.1 255.255.255.240
 ip pim sparse-dense-mode

R2#
ip multicast-routing
!
interface FastEthernet0/1
 ip address 180.40.7.98 255.255.255.224
 ip pim sparse-dense-mode
 duplex auto
 speed auto
!
interface Serial1/0
 no ip address
 encapsulation frame-relay
!
interface Serial1/0.1 multipoint
 ip address 180.40.7.35 255.255.255.224
 ip pim sparse-dense-mode
 ip ospf network point-to-point
 frame-relay interface-dlci 203
!
interface Serial1/0.2 multipoint
 ip address 180.40.7.65 255.255.255.224
 ip pim sparse-dense-mode
 ip ospf network point-to-multipoint
 frame-relay interface-dlci 201

interface Serial1/2
 ip address 180.40.7.2 255.255.255.224
 ip pim sparse-dense-mode
 clockrate 64000

R3#
ip multicast-routing
!
!
interface FastEthernet0/1
 ip address 180.40.7.129 255.255.255.224
 ip pim sparse-dense-mode
 duplex auto
 speed auto
!
interface Serial1/0
 ip address 180.40.7.33 255.255.255.224
 ip pim sparse-dense-mode
 encapsulation frame-relay
 ip ospf network point-to-multipoint
!

interface Serial1/2
 ip address 180.40.7.3 255.255.255.224
 ip pim sparse-dense-mode
!
R4#
ip multicast-routing
!
!
interface FastEthernet0/0
 ip address 180.40.7.130 255.255.255.224
 ip nat inside
 ip pim dense-mode
 duplex auto
 speed auto
!
S5#
ip multicast-routing
!
!
!
interface FastEthernet0/1
 no switchport
 ip address 17.57.100.2 255.255.255.0
 ip pim sparse-mode
!

S6#
S6#sh run | b ip mul
ip multicast-routing
!
interface FastEthernet0/2
 no switchport
 ip address 180.40.7.97 255.255.255.224
 ip pim sparse-dense-mode
!