IBM RackSwitch G8000

230 RackSwitch G8000: Application Guide
4. Configure the upstream Mrouters with IPv4 addresses.
Advanced Configuration Example: IGMP Relay
Figure 21 shows an example topology. Switches B and C are configured with IGMP
Relay.
Figure 21. Topology
Devices in this topology are configured as follows:
• The IP address of Multicast Router 1 is 5.5.5.5
• The IP address of Multicast Router 2 is 5.5.5.6
• STG 2 includes VLAN2; STG 3 includes VLAN 3; STG 5 includes VLAN 5.
• The multicast server sends IP multicast traffic for the following groups:
– VLAN 2, 225.10.0.11 – 225.10.0.15
•
The multicast hosts send the following IGMP Reports:
– Host 1: 225.10.0.11 – 225.10.0.12, VLAN 3
– Host 2: 225.10.0.12 – 225.10.0.13, VLAN 2; 225.10.0.14 – 225.10.0.15,
VLAN 3
– Host 3: 225.10.0.13 – 225.10.0.14, VLAN 2
•
The Mrouter receives all the multicast traffic.
RS G8000(config)# ip igmp relay mrouter 1 address 100.0.1.2
RS G8000(config)# ip igmp relay mrouter 1 enable
RS G8000(config)# ip igmp relay mrouter 2 address 100.0.2.4
RS G8000(config)# ip igmp relay mrouter 2 enable
Multicast
Server
Multicast
Host 1
Multicast
Host 2
VLAN 3
VLANs 2,3
Switch B
5 6
Switch A
1
4
Trunk 1
VLAN 2
Trunk 2
VLAN 2
Trunk 3
VLAN 2
VLAN 2
1 2
3
4
Multicast
Host 3
Multicast
Router 1
Multicast
Router 2
VLAN 2
VLAN 5
VLAN 5
Switch C
5 6
7
3
4
1 2
5
2
3