Configuring Igmp Report Suppression; Configuring Maximum Multicast Groups That Can Be Joined On A Port - H3C S5120-SI Series Operation Manual

With the function of dropping unknown multicast data disabled, the switch floods unknown
multicast data in the VLAN which the unknown multicast data belongs to.
Follow these steps to configure the function of dropping unknown multicast data in a VLAN:
To do...
Enter system view
Enter VLAN view
Enable the function of dropping
unknown multicast data

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. Thus, when multiple members of a
multicast group are attached to the Layer 2 device, the Layer 3 device directly connected with it will
receive duplicate IGMP reports from these members.
With the IGMP report suppression function enabled, within each query cycle, the Layer 2 device
forwards only the first IGMP report per multicast group to the Layer 3 device and will not forward the
subsequent IGMP 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 IGMP report suppression:
To do...
Enter system view
Enter IGMP snooping view
Enable IGMP report
suppression
On an IGMP Snooping proxy, IGMP membership report suppression does not take effect.

Configuring Maximum Multicast Groups that Can Be Joined on a Port

By configuring the maximum number of multicast groups that can be joined on a port, you can limit the
number of multicast programs on-demand available to users, thus to regulate traffic on the port.
Follow these steps to configure the maximum number of multicast groups allowed on a port or ports:
To do...
Enter system view
Enter Ethernet interface/Layer
2 aggregate interface view or
Use the command...
system-view
vlan vlan-id
igmp-snooping
drop-unknown
Use the command...
system-view
igmp-snooping
report-aggregation
Use the command...
system-view
interface interface-type
interface-number
2-17
Remarks
—
—
Required
Disabled by default
Remarks
—
—
Optional
Enabled by default
Remarks
—
Required