H3C Technologies H3C S3100 Series Switches - Manual (Page 324)

3-17
Configuring MLD Report Suppression
When a Layer 2 device receives an MLD report from an IPv6 multicast group member, the Layer 2
device forwards the message to the Layer 3 device directly connected with it. Thus, when multiple
members belonging to an IPv6 multicast group exist on the Layer 2 device, the Layer 3 device directly
connected with it will receive duplicate MLD reports from these members.
With the MLD report suppression function enabled, within a query interval, the Layer 2 device forwards
only the first MLD report of an IPv6 group to the Layer 3 device and will not forward the subsequent
MLD reports from the same multicast group to the Layer 3 device. This helps reduce the number of
packets being transmitted over the network.
Follow these steps to configure MLD report suppression:
To do... Use the command... Remarks
Enter system view system-view —
Enter MLD snooping view mld-snooping —
Enable MLD report suppression report-aggregation
Optional
Enabled by default
On an MLD snooping proxy, MLD membership reports are suppressed if the entries for the
corresponding groups exist in the forwarding table, no matter the suppression function is enabled or
not.
Configuring Maximum Multicast Groups that Can Be Joined on a Port
By configuring the maximum number of IPv6 multicast groups that can be joined on a port or a group of
ports, you can limit the number of multicast programs available to VOD users, thus to control the traffic
on the port.
Follow these steps configure the maximum number of IPv6 multicast groups that can be joined on a port
or a group of ports:
To do... Use the command... Remarks
Enter system view system-view —
Enter Ethernet interface view
interface interface-type
interface-number
—
Configure the maximum number of
IPv6 multicast groups that can be
joined on a port
mld-snooping group-limit limit
[ vlan vlan-list ]
Optional
512 by default.