3Com Switch 8807, Configuration Manual

Page: 449 / 883

IGMP Configuration 449
Configuring a Router to
Join Specified Multicast
Group
Usually, the host operating IGMP will respond to IGMP query packet of the
multicast router. In case of response failure, the multicast router will consider that
there is no multicast member on this network segment and will cancel the
corresponding path. 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 switch interface to join a
multicast group.
Perform the following configuration in the corresponding view.
n
The above two configuration methods have the same result (both takes effect on
port). You can select either of them.
By default, a router joins no multicast group. Note that the specified port must
belong to this interface on which IGMP is enabled. Otherwise, the configuration
does not take effect.
Deleting IGMP Groups
Joined on an Interface This configuration task is to delete all IGMP groups joined on all interfaces or
specific interfaces of the router, or to delete the IGMP groups at the specific
address or in the specific network segment on the specific interfaces of the router.
Perform the following configuration in user view.
After a group is deleted, if other IGMP membership report messages occur, the
interfaces can join the corresponding group again.
Configuring the Filtering
Rule of Multicast Groups On the IGMP snooping-enabled switch, you can configure ACL rules whether the
specified multicast group can be joined to a VLAN or not. This feature filters every
received IGMP join packet. According to the destination group address of the
Table 442 Configure a router to join specified multicast group
Operation Command
Configure the router to join a specified
multicast group (in interface view)
igmp host-join group-address port
interface-type interface-number [ to
interface-type interface- number ]
Cancel the configuration (in interface view)
undo igmp host-join group-address port
interface-type interface- num [ to
interface-type interface-number ]
Configure the router to join a specified
multicast group (in Ethernet port view)
igmp host-join group-address vlan vlan-id
Cancel the configuration (in Ethernet port
view) undo igmp host-join group-address vlan
vlan-id
Table 443 Delete IGMP groups joined on an interface
Operation Command
Delete IGMP groups joined on an interface
reset igmp group { all | interface
vlan-interface interface-number { all |
group-address [ group-mask ] } }