H3C S3600 Series User Manual

Operation Manual – Multicast
H3C S3600 Series Ethernet Switches-Release 1510 Chapter 6 IGMP Configuration
6-11
Caution:
z If the number of joined multicast groups on the interface exceeds the user-defined
limit, new groups are not allowed to join.
z If you configure the number of IGMP groups on the interface to 1, the new group
takes precedence. That is, if a new group joins the interface, the former multicast
group will be replaced automatically and leaves the interface automatically.
z If the number of existing IGMP multicast groups has exceeded the configured limit
on the number of joined multicast groups on the interface, the system will delete
some existing multicast groups automatically until the number of multicast groups
on the interface is conforming to the configured limit.
6.2.4 Configuring Router Ports to Join the Specified Multicast Group
Generally, the host running IGMP will respond to the IGMP query packets of the
multicast switch. If the host cannot respond for some reason, the multicast switch may
consider that there is no member of the multicast group in this network segment and
then cancel the corresponding paths.
In order to avoid such cases, you must configure a port of the VLAN interface of the
switch as a router port to add it to the multicast group. When the port receives IGMP
query packets, the multicast switch will respond to it. As a result, the network segment
where the Layer 3 interfaces reside can continue to receive multicast packets.
Table 6-5 Configure router ports to join the specified multicast group
Operation Command Description
Enter system view system-view —
Enable the multicast
routing protocol
multicast
routing-enable
Required
Enter VLAN interface
view
interface Vlan-interface
interface-number
—
Enable IGMP on the
current interface
igmp enable
Required
IGMP is disabled on the
interface by default.
Configure router ports to
join a multicast group
igmp host-join
group-address port
interface-list
Optional
By default, the router port
does not join any
multicast group.
Quit VLAN interface view
quit
—

H3C S3600 Series Specifications

General

Brand	H3C
Model	S3600 Series
Category	Switch
Language	English