H3C Technologies H3C S3100V2 Series Switches - Manual (Page 82)

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Configuring an IPv6 multicast group filter
On a MLD snooping-enabled switch, the configuration of an IPv6 multicast group filter enables the
service provider to define limits of multicast programs available to different users.
In an actual application, when a user requests a multicast program, the user’s host initiates an MLD report.
Upon receiving this report message, the switch compares the report against the configured ACL rule. If
the port that received the report can join this IPv6 multicast group, the switch adds an entry for this port
in the MLD snooping forwarding table. Otherwise the switch drops this report message. Any IPv6
multicast data that fails 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 an IPv6 multicast group filter globally
Follow these steps to configure an IPv6 multicast group globally:
To do... Use the command... Remarks
Enter system view system-view —
Enter MLD snooping view mld-snooping —
Configure an IPv6 multicast group
filter group-policy acl6-number [ vlan
vlan-list ]
Required
By default, no IPv6 group filter is
globally configured. That is, hosts
in VLANs can join any valid
multicast group.
Configuring an IPv6 multicast group filter on a port or a group of ports
Follow these steps to configure an IPv6 multicast group filer 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 an IPv6 multicast group
filter mld-snooping group-policy
acl6-number [ vlan vlan-list ]
Required
By default, no IPv6 group filter is
configured on an interface. That is,
hosts on the interface can join any
valid multicast group.
Configuring dropping unknown IPv6 multicast data
Unknown IPv6 multicast data refers to IPv6 multicast data for which no entries exist in the MLD snooping
forwarding table. When the switch receives such IPv6 multicast traffic, it performs the following
operation:
• With the function of dropping unknown IPv6 multicast data enabled, the switch drops all unknown
IPv6 multicast data received.
• With the function of dropping unknown IPv6 multicast data disabled, the switch floods unknown
IPv6 multicast data in the VLAN to which the unknown IPv6 multicast data belongs.