3Com SuperStack 4 Configuration Manual page 173

Perform the following configuration in the corresponding view.
Table 197 Configuring a router to join specified multicast group
Operation
Configure a router to join
specified multicast group
(VLAN Interface View)
Quit from specified
multicast group (VLAN
Interface View)
Configure a router to join
specified multicast group
(Ethernet Port View)
Quit from specified
multicast group (Ethernet
Port View)
By default, a router joins no multicast group.
Limiting Multicast Groups 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 Interface view.
Table 198 Limiting multicast groups an interface can access
Operation
Limit the range of allowed
multicast groups on
current interface (Interface
View)
Remove the filter set on
the interface (Interface
View)
Limit the range of allowed
multicast groups on
current interface (Ethernet
port view)
Remove the filter set on
the interface (Ethernet
port view)
By default, no filter is configured, that is, all multicast groups are allowed on the
interface.
Configuring the Interval to Send IGMP Query Message
Multicast routers send IGMP query messages to discover which multicast groups
are present on attached networks. Multicast routers send query messages
periodically to refresh their knowledge of members present on their networks.
Internet Group Management Protocol (IGMP)
Command
group_address
igmp host-join
interface_type interface_ num | interface_name }
[ { interface_type interface_ num |
to
interface_name } ]
undo igmp host-join
interface_type interface_ num | interface_name }
[ { interface_type interface_ num |
to
interface_name } ]
igmp host-join group-address
undo igmp host-join
Command
igmp group-policy acl_number
interface_type interface_ num | interface_name
} [ to {
interface_type interface_ num |
interface_name
} ] ]
undo igmp group-policy [ port {
interface_ num | interface_name
interface_type interface_ num | interface_name
} ] ]
igmp group-policy acl-number vlan vlanid
undo igmp group-policy vlan vlanid
{
port
{
group-address port
vlan vlanid
group-address
vlan
[ 1 | 2 | port {
interface_type
} [ to {
185
vlanid