Configuring To Limit The Number Of Multicast Groups On A Port; Configuring Multicast Vlan - H3C S7500 Series Operation Manual

Operation Manual – Multicast
H3C S7500 Series Ethernet Switches

3.2.5 Configuring to Limit the Number of Multicast Groups on a Port

With limit imposed on the number of multicast groups on a switch port, users can no
longer have as many multicast groups as they want when demanding programs in
multicast groups. Thereby, the bandwidth on the port is controlled.
Follow these steps to configure to limit number of multicast groups on a port:
To do...
Enter system view
Enter Ethernet port
view
Limit the number of
multicast groups on a
port
3.2.6 Configuring Suppression on IGMP Report Messages
When a Layer 2 switch receives IGMP report messages from a host in a multicast
group, the switch will forward the packets to the port of a Layer 3 switch that is
connected to it. In this way, a Layer 3 switch will receive the same IGMP report
messages from multiple hosts in a multicast group when there are multiple hosts in this
multicast group.
When suppression on IGMP report messages is enabled, in a query interval, the Layer
2 switch will forward only the first IGMP report message from a multicast group to the
Layer 3 switch, and drop the other IGMP report messages from the same multicast
group.
Follow these steps to configure suppression on IGMP report messages:
To do...
Enter system view
Configure
suppression on IGMP
report messages

3.2.7 Configuring Multicast VLAN

In the current multicast mode, when users in different VLANs order the same stream,
the multicast stream is copied to each of the VLANs. This mode wastes a lot of
bandwidth.
Use the command...
system-view
interface interface-type
interface-number
igmp-snooping group-limit
limit [ vlan vlan-list
[ overflow-replace ] |
overflow-replace]
Use the command...
system-view
report-aggregation
3-10
Chapter 3 IGMP Snooping Configuration
Remarks
—
—
Optional
The number of multicast
groups on a port is not
limited by default.
Remarks
—
Required
By default, suppression on IGMP
report messages is disabled.