H3C S5120-EI Series User Manual

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Configuring an IGMP Snooping Policy
Configuration Prerequisites
Before configuring an IGMP Snooping policy, complete the following task:
z Enable IGMP Snooping in the VLAN or enable IGMP on the desired VLAN interface
Before configuring an IGMP Snooping policy, prepare the following data:
z ACL rule for multicast group filtering
z The maximum number of multicast groups that can pass the ports
Configuring a Multicast Group Filter
On an IGMP Snooping–enabled switch, the configuration of a multicast group allows the service
provider to define restrictions on multicast programs available to different users.
In an actual application, when a user requests a multicast program, the user’s host initiates an IGMP
report. Upon receiving this report message, the switch checks the report against the configured ACL
rule. If the port on which the report was received can join this multicast group, the switch adds an entry
for this port in the IGMP Snooping forwarding table; otherwise the switch drops this report message.
Any multicast data that has failed the ACL check will not be sent to this port. In this way, the service
provider can control the VOD programs provided for multicast users.
Configuring a multicast group filter globally
Follow these steps to configure a multicast group filter globally:
To do... Use the command... Remarks
Enter system view
system-view
—
Enter IGMP Snooping view
igmp-snooping
—
Configure a multicast group
filter
group-policy acl-number
[ vlan vlan-list ]
Required
No group filter is configured by
default.
Configuring a multicast group filter on a port or a group of ports
Follow these steps to configure a multicast group filter on a port or a group of ports:
To do... Use the command... Remarks
Enter system view
system-view
—
interface interface-type
interface-number
Enter Ethernet port/Layer 2
aggregate port view or port
group view
port-group manual
port-group-name
Required
Use either approach
Configure a multicast group
filter
igmp-snooping group-policy
acl-number [ vlan vlan-list ]
Required
No group filter is configured by
default.

H3C S5120-EI Series Specifications

General

Brand	H3C
Model	S5120-EI Series
Category	Switch
Language	English