H3C Technologies H3C WX3000E Series Wireless Switches - Manual (Page 26)

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Step Command Remarks
2. Enter Layer 2 Ethernet
interface view, Layer 2
aggregate interface view, or
port group view.
• Enter Layer 2 Ethernet interface
view or Layer 2 aggregate
interface view:
interface interface-type
interface-number
• Enter port group view:
port-group manual
port-group-name
Use either approach.
3. Configure a multicast group
filter.
igmp-snooping group-policy
acl-number [ vlan vlan-list ]
By default, no group filter is
configured on the current port. That
is, the hosts on this port can join
any valid multicast group.
Configuring the function of dropping unknown multicast data
Unknown multicast data refers to multicast data for which no forwarding entries exist in the IGMP
snooping forwarding table. After the AC receives such multicast traffic, , one of the following occurs:
• When the function of dropping unknown multicast data is disabled, the AC floods unknown
multicast data in the VLAN that the unknown multicast data belongs to.
• When the function of dropping unknown multicast data is enabled, the AC drops all the unknown
multicast data received.
Configuration guidelines
• The configurations made by the drop-unknown and igmp-snooping drop-unknown commands in
IGMP-snooping view and in VLAN view are mutually exclusive. Namely, after this function is
enabled in IGMP-snooping view, it cannot be enabled or disabled in VLAN view, and vice versa.
• When enabled to drop unknown IPv4 multicast data, the AC automatically drops unknown IPv6
multicast data.
Configuration procedure
To configure globally the function of dropping unknown multicast data:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter IGMP-snooping view. igmp-snooping N/A
3. Enable the function of
dropping unknown multicast
data.
drop-unknown Disabled by default
To configure the function of dropping unknown multicast data in a VLAN:
Step Command Remarks
1. Enter system view. system-view N/A
2. Enter VLAN view. vlan vlan-id N/A