3com 4210 PWR 9-Port 3CR17341-91-ME ユーザーズマニュアル

C

HAPTER

 16: IGMP S

NOOPING

 C

ONFIGURATION

To prevent multicast traffic from being flooded at Layer 2, enable IGMP snooping 
on Layer 2 switches. 

■

As shown in Figure 64, Router A connects to a multicast source (Source) 
through Ethernet1/0/2, and to Switch A through Ethernet1/0/1.

■

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.

Figure 64   Network diagram for IGMP Snooping configuration

1 Configure the IP address of each interface

Configure an IP address and subnet mask for each interface shown in Figure 64. 
The detailed configuration steps are omitted. 

2 Configure Router A

Clear IGMP Snooping 
statistics

You can execute the reset 
command in user view.

Display and maintain IGMP Snooping

 Multicast packets

Router A

Switch A

Host B

Host A

Host C

1.1.1.1/24

Eth1/0 /4

Eth1/0 /2

Eth1 /0/3

Eth1 /0/1

Eth1 /0/1
10 .1 .1.1/24

Eth1/0/2

1 .1.1.2/24

VLAN100