Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide Chapter 2 IGMP Configuration Commands
3Com Corporation
2-6
2.1.7 igmp group-policy
Syntax
igmp group-policy acl-number [ 1 | 2 ]
undo igmp group-policy
View
Interface view
Parameter
acl-number: Number of basic IP ACL, defining the range of a multicast group. The value
ranges from 2000 to 2999.
1: IGMP Version 1.
2: IGMP Version 2. If IGMP version is not specified, IGMP Version 2 is used by default.
Description
Use the igmp group-policy command to set the filter of multicast groups on an
interface to control the accessing to the IP multicast groups.
Use the 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 interface is on to join some
multicast groups and receive the packets from the multicast groups, you can use this
command to limit the range of the multicast groups served by the interface.
Related command: igmp host-join.
Example
# Permit the hosts on the interface Ethernet1/0/0 to join multicast group 225.1.1.1 only.
[3Com] acl number 2005
[3Com-acl-basci-2005] rule permit source 225.1.1.1 0
[3Com-acl-basci-2005] quit
[3Com] interface ethernet 1/0/0
[3Com-Ethernet1/0/0] igmp group-policy 2005
2.1.8 igmp host-join
Syntax
igmp host-join group-address
undo igmp host-join group-address