Igmp Snooping Configuration Examples - 3Com 4500 Configuration Manual

IGMP Snooping Configuration Examples

Configuring IGMP Snooping
Network requirements
To prevent multicast traffic from being flooded at Layer 2, enable IGMP snooping on Layer 2 switches.
As shown in
and to Switch A through Ethernet 1/0/1.
Run PIM-DM and IGMP on Router A. Run IGMP snooping on Switch A. Router A acts as the IGMP
querier.
The multicast source sends multicast data to the multicast group 224.1.1.1. Host A and Host B are
receivers of the multicast group 224.1.1.1.
Network diagram
Figure 3-3 Network diagram for IGMP Snooping configuration
Source
Eth1/0/2
1.1.1.2/24
1.1.1.1/24
IGMP querier
Multicast packets
Configuration procedure
1) Configure the IP address of each interface
Configure an IP address and subnet mask for each interface as per
configuration steps are omitted.
2) Configure Router A
# Enable IP multicast routing, enable PIM-DM on each interface, and enable IGMP on Ethernet 1/0/1.
<RouterA> system-view
[RouterA] multicast routing-enable
[RouterA] interface Ethernet 1/0/1
[RouterA-Ethernet1/0/1] igmp enable
[RouterA-Ethernet1/0/1] pim dm
[RouterA-Ethernet1/0/1] quit
[RouterA] interface Ethernet 1/0/2
[RouterA-Ethernet1/0/2] pim dm
[RouterA-Ethernet1/0/2] quit
Figure 3-3, Router A connects to a multicast source (Source) through Ethernet 1/0/2,
VLAN100
Eth1/0/1
Eth1/0/1
10.1.1.1/24
Router A Switch A
Receiver
Host A
Receiver
Eth1/0/4
Eth1/0/3
Host B
Eth1/0/2
Host C
1-17
Figure 3-3. The detailed