3Com Switch 7750 Series
Command Reference Guide – Multicast Chapter 4 IGMP Configuration Commands
4-6
Description
Use the igmp group-policy command to set the filter of multicast groups on the VLAN
interface to control the access to IP multicast groups.
Use undo igmp group-policy command to remove the filter configured.
By default, no filter is configured, that is, a host can join any multicast group.
If you do not want the hosts on the network that the VLAN interface is on to join some
multicast groups and receive packets from the multicast groups to use this command to
limit the range of the multicast groups serviced by the VLAN interface.
Related command: igmp host-join.
Caution:
Ethernet ports must belong to the igmp-group-policy-enabled VLAN interfaces only.
Example
# Configure the access-list 2000.
<3Com> system-view
System View: return to User View with Ctrl+Z.
[3Com] acl number 2000
[3Com-acl-basic-2000] rule permit source 225.0.0.0 0.255.255.255
[3Com-acl-basic-2000] quit
# Configure that only the hosts matching ACL 2000 rules on VLAN-interface10 can be
added to the multicast group whose IGMP version is specified to 2.
[3Com-vlan-interface10] igmp group-policy 2000 2
4.1.6 igmp group-policy vlan Syntax
igmp group-policy acl-number vlan vlan-id
undo igmp group-policy vlan vlan-id
View
Port view
Parameter
acl-number: Number of the basic IP access control list number, defining a multicast
group range. The value ranges from 2000 to 2999.