H3C Technologies H3C S3100V2 Series Switches - Manual (Page 37)

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Configuring multicast source port filtering globally
Follow these steps to configure multicast source port filtering globally:
To do... Use the command... Remarks
Enter system view system-view —
Enter IGMP snooping view igmp-snooping —
Enable multicast source port
filtering
source-deny port interface-list
Required
Disabled by default
Configuring multicast source port filtering on a port or a group of ports
Follow these steps to configure multicast source port filtering on a port or a group of ports:
To do... Use the command... Remarks
Enter system view system-view —
interface interface-type
interface-number
Enter Ethernet interface view or
port group view
port-group manual
port-group-name
Required
Use either approach
Enable multicast source port
filtering
igmp-snooping source-deny
Required
Disabled by default
Configuring the function of dropping unknown multicast data
Unknown multicast data refers to multicast data for which no entries exist in the IGMP snooping
forwarding table. When the switch receives such multicast traffic, one of the following occurs:
• When the function of dropping unknown multicast data is disabled, the switch floods unknown
multicast data in the VLAN that the unknown multicast data belongs to, causing network bandwidth
waste and low forwarding efficiency.
• When the function of dropping unknown multicast data is enabled, the switch forwards unknown
multicast data to its router ports instead of flooding it in the VLAN. If no router ports exist, the switch
drops the unknown multicast data.
Follow these steps to configure globally the function of dropping unknown multicast data:
To do... Use the command... Remarks
Enter system view system-view —
Enter IGMP snooping view igmp-snooping —
Enable the function of dropping
unknown multicast data
drop-unknown
Required
Disabled by default
Configuring IGMP report suppression
When a Layer 2 device receives an IGMP report from a multicast group member, the device forwards the
message to the Layer 3 device directly connected with it. When multiple members of a multicast group