Limiting Multicast Groups That An Interface Can Access - 3Com 8800 Configuration Manual

3Com Switch 8800 Configuration Guide
Configuring one interface of the router as multicast member can avoid such problem.
When the interface receives IGMP query packet, the router will respond, thus ensuring
that the network segment where the interface located can normally receive multicast
packets.
For an Ethernet switch, you can configure a port in a VLAN interface to join a multicast
group.
Perform the following configuration in the corresponding view.
Table 27-9 Configuring a router to join specified multicast group
Configure the router to join
a specified multicast group
(in VLAN interface view)
Cancel the configuration (in
VLAN interface view)
Configure the router to join
a specified multicast group
(in Ethernet port view)
Cancel the configuration (in
Ethernet port view)
Note:
The above two configuration methods have the same result (both takes effect on port).
You can select any one of them.
By default, a router joins no multicast group. Note that the specified port must belong to
this VLAN interface on which IGMP is enabled. Otherwise, the configuration does not
take effect.

27.2.10 Limiting Multicast Groups that an Interface Can Access

A multicast router learns whether there are members of a multicast group on the
network via the received IGMP membership message. A filter can be set on an
interface so as to limit the range of allowed multicast groups.
Perform the following configuration in the corresponding view.
Operation Command
igmp host-join group-address port { interface_type
interface_ num |
{ interface_type interface_ num | interface_name } ]
undo igmp host-join
{ interface_type interface_ num | interface_name }
[ to { interface_type
interface_name } ]
igmp host-join group-address vlan vlanid
undo igmp host-join group-address vlan vlanid
27-7
Chapter 27 IGMP Configuration
interface_name }
group-address
interface_ num
[ to
port
|