Multicast Routing

Practical 8: Multicast Routing
Advance Computer Network MSc IT Part 1 Practicals

Network Topology

Configurations of all the routers
Router R1

R1#en
R1#conf t
R1(config)#int f1/0
R1(config-if)#ip add 192.168.12.1 255.255.255.0
R1(config-if)#no shut
R1(config-if)#exit
R1(config-router)#router ospf 1
R1(config-router)#network 0.0.0.0 255.255.255.255 area 0
R1(config-router)#exit
R1(config)#ip multicast-routing
R1(config)#int f1/0
R1(config-if)#ip pim sparse-dense-mode
R1(config-if)#exit
R1(config)#int f1/1
R1(config-if)#ip pim sparse-dense-mode
R1(config-if)#exit
R1(config)#ip pim rp-address 3.3.3.3 1
R1(config)#access-list 1 permit 224.4.4.4

Router R2

R2#en
R2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R2(config)#int f1/0
R2(config-if)#ip add 192.168.12.2 255.255.255.0
R2(config-if)#no shut
R2(config-if)#exit
R2(config)#router ospf 1
R2(config-router)#network 0.0.0.0 255.255.255.255 area 0
R2#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R2(config)#int f1/1
R2(config-if)#ip add 192.168.23.1 255.255.255.0
R2(config-if)#no shut
R2(config-if)#exit
R2(config)#ip multicast-routing
R2(config)#int f1/0
R2(config-if)#ip pim sparse-dense-mode
R2(config-if)#exit
R2(config)#int f1/1
R2(config-if)#ip pim sparse-demse-mode
R2(config)#ip pim rp-address 3.3.3.3 1
R2(config)#access-list 1 permit 224.4.4.4
R2(config)#
R2(config)#int f1/0
R2(config-if)#ip igmp join group 224.4.4.4

Router R3

R3#en
R3#conf t
Enter configuration commands, one per line. End with CNTL/Z.
R3(config)#int f1/0
R3(config-if)#ip add 192.168.34.2 255.255.255.0
R3(config-if)#no shut
R3(config-if)#exit
R3(config)#
R3(config)#router ospf 1
R3(config-router)#network 0.0.0.0 255.255.255.255 area 0
R3(config-router)#exit
R3(config)#ip multicast-routing
R3(config)#int f1/0
R3(config-if)#ip pim sparse-dense-mode

R3(config-if)#exit
R3(config)#int f1/1
R3(config-if)#ip pim sparse-dense-mode
R3(config-if)#exit
R3(config)#
R3(config)#ip pim rp-address 3.3.3.3 1
R3(config)#
*Apr 8 20:10:32.099: %LINEPROTO-5-UPDOWN: Line protocol on Interface Tunnel0, changed state to up
R3(config)#access-list 1 permit 224.4.4.4
R3(config)#int f1/0
R3(config-if)#ip igmp join-group 224.4.4.4
R3(config-if)#exit
R3(config)#

Router R4

R4(config)#int f1/0
R4(config-if)#ip add 192.168.23.2 255.255.255.0
R4(config-if)#no shut
R4(config-if)#exit
R4(config)#int f1/1
R4(config-if)#ip add 192.168.34.1 255.255.255.0
R4(config-if)#no shut
R4(config-if)#exit
R4(config-router)#router ospf 1
R4(config-router)#network 0.0.0.0 255.255.255.0 area 0
R4(config)#ip multicast-routing
R4(config)#int f1/0
R4(config-if)#ip pim sparse-dense-mode
R4(config-if)#exit
R4(config)#
R4(config)#int f1/1
R4(config-if)#ip pim sparse-dense-mode
R4(config-if)#exit
R4(config)#
R4(config)#interface loopback 1
R4(config-if)#ip add 3.3.3.3 255.255.255.0
R4(config-if)#exit
R4(config)#ip pim rp-address 3.3.3.3 1
R4(config)#access-list 1 permit 224.4.4.4

Testing the connection
We try to ping the group address 224.4.4.4 from router R1