Operation Manual – Multicast
H3C S3600 Series Ethernet Switches-Release 1510 Chapter 6 IGMP Configuration
6-9
Caution:
When there are multiple multicast routers in a network segment, the querier is
responsible for sending IGMP query messages to all the hosts in the network segment.
6.2.3 Configuring IGMP Multicast Groups on the Interface
You can perform the following configurations on the interface for the IGMP multicast
groups:
z Limit the number of joined multicast groups
z Limit the range of multicast groups that the interface serves
I. Limit the number of joined multicast groups
If the number of joined 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 a limit on the number of joined IGMP multicast groups on the
interface of the switch. Thus, when users order 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 by translating
the received IGMP join packets. You can configure a filter for each interface to limit the
range of multicast groups that the interface serves.
Table 6-4 Configure IGMP multicast groups on the interface
Operation Command Description
Enter system view
system-view
—
Enter VLAN interface
view
interface Vlan-interface
interface-number
—
Enable IGMP on the
current interface
igmp enable
Required
IGMP is disabled on the
interface by default.
Configure a limit on the
number of joined IGMP
groups on the interface
igmp group-limit limit
Required
By default, the number of
multicast groups passing
a port is not limited.
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