Configuring Igmp Multicast Groups On The Interface - H3C S7500 Series Operation Manual

Operation Manual – Multicast
H3C S7500 Series Ethernet Switches

6.2.3 Configuring IGMP Multicast Groups on the Interface

You can perform the following configurations on the interface for the IGMP multicast
groups:
Limit the number of multicast groups on the interface
Limit the range of multicast groups that the interface serves
I. Limit the number of multicast groups on the interface
If the number of IGMP groups on the multicast routing interface of the switch is not
limited, the memory of the switch may be used out and the routing interface of the
switch may fail when plenty of multicast groups join in the routing interface.
You can configure limit on the number of IGMP multicast groups on the interface of the
switch. Thus, when users are ordering the programs of multicast groups, the network
bandwidth can be controlled because the number of multicast groups is limited.
II. Limit the range of multicast groups that the interface serves
The Layer 3 switch determines the membership of the network segment through
translating the received IGMP join messages. You can configure a filter for each
interface to limit the range of multicast groups that the interface serves.
Follow these steps to configure IGMP multicast groups on the interface:
Enter system view
Enable the multicast
routing protocol
Enter VLAN interface view
Enable IGMP on the
current interface
Configure limit on the
number of IGMP groups
on the interface
To do...
system-view
multicast
routing-enable
interface Vlan-interface
interface-number
igmp enable
igmp group-limit limit
Use the command...
6-9
Chapter 6 IGMP Configuration
Remarks
—
Enable the multicast
routing protocol.
—
By default, if the IP
multicast routing protocol
is enabled globally, IGMP
is enabled on all the
layer-3 interfaces
automatically.
Required
By default, the number of
multicast groups joining a
VLAN interface is 256.