H3C Technologies H3C WX3000 Series Unified Switches - Manual (Page 445)

44-15
Displaying and Maintaining IGMP Snooping
To do… Use the command… Remarks
Display the current IGMP
Snooping configuration display igmp-snooping
configuration
Display IGMP Snooping message
statistics display igmp-snooping
statistics
Display the information about IP
and MAC multicast groups in one
or all VLANs
display igmp-snooping group
[ vlan vlanid ]
Available in any view
Clear IGMP Snooping statistics reset igmp-snooping statistics Available in user view
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 devices.
z
As shown in Figure 44-3 , Router A connects to a multicast source (Source) through
GigabitEthernet1/0/2, and to Switch A through GigabitEthernet1/0/1.
z
Run PIM-DM and IGMP on Router A. Run IGMP snooping on Switch A. Router A acts as the IGMP
querier.
z
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 44-3 Network diagram for IGMP Snooping configuration
Multicast packets
Source
Router A Switch A
Receiver
Receiver
Host B
Host A
Host C
1.1.1.1/24
GE1/0/4
GE1/0/2
GE 1/0/3
IGMP querier
GE1/0/1
GE 1/0/1
10 .1 .1.1/24 GE1/0/2
1.1.1.2/24
VLAN100
Configuration procedure
1) Configure the IP address of each interface