H3C Technologies H3C S3100V2 Series Switches - Manual (Page 36)

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Configuring a multicast group filter
On an IGMP snooping–enabled switch, a multicast group filter enables the service provider to define
restrictions on multicast programs available to different users.
In an application, when a user requests a multicast program, the user’s host initiates an IGMP report.
Upon receiving this report message, the switch checks the report against the configured ACL rule. If the
port on which the report was received can join this multicast group, the switch adds an entry for this port
in the IGMP snooping forwarding table. Otherwise the switch drops this report message. Any multicast
data that has failed the ACL check will not be sent to this port. In this way, the service provider can control
the VOD programs provided for multicast users.
Configuring a multicast group filter globally
Follow these steps to configure a multicast group filter globally:
To do... Use the command... Remarks
Enter system view system-view —
Enter IGMP snooping view igmp-snooping —
Configure a multicast group filter
group-policy acl-number [ vlan
vlan-list ]
Required
By default, no group filter is
globally configured. The hosts in a
VLAN can join any valid multicast
group.
Configuring a multicast group filter on a port or a group of ports
Follow these steps to configure a multicast group filter 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/Layer 2
aggregate interface view or port
group view
port-group manual
port-group-name
Required
Use either approach
Configure a multicast group filter
igmp-snooping group-policy
acl-number [ vlan vlan-list ]
Required
By default, no group filter is
configured on the current port. The
hosts on this port can join any valid
multicast group.
Configuring multicast source port filtering
With the multicast source port filtering feature enabled on a port, the port can be connected with
multicast receivers only rather than with multicast sources, because the port will block all multicast data
packets but it permits multicast protocol packets to pass.
If this feature is disabled on a port, the port can be connected with both multicast sources and multicast
receivers.