3Com 5500-SI Configuration Manual page 331

Table 334 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 335 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)
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.
Perform the following configuration in Interface view.
Table 336 Configuring the interval to send IGMP query message
Operation
Configure the interval to send IGMP query message
Restore the default value
When there are multiple multicast routers on a network segment, the querier is
responsible for sending IGMP query messages to all hosts on the LAN.
By default, the interval is 60 seconds.
Internet Group Management Protocol (IGMP) 331
Command
igmp host-join group_address port
|
interface_ num interface_name
interface_type interface_ num
undo igmp host-join group-address port
interface_type interface_ num
{
to interface_type interface_ num
} ]
interface_name
igmp host-join group-address vlan vlanid
undo igmp host-join group-address vlan vlanid
Command
igmp group-policy acl_number [ 1 | 2 | port {
interface_type interface_ num | interface_name }
[ to { interface_type interface_ num |
interface_name } ] ]
undo igmp group-policy [ port { interface_type
interface_ num | interface_name } [ to {
interface_type interface_ num | interface_name }
] ]
{
interface_type
} [
{
to
|
interface_name
{
|
interface_name
|
Command
igmp timer query seconds
undo igmp timer query
} ]
} [