User's Manual

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the multicast group assignment information varies.
Different the above “dynamic multicast group”, if a port is configured to belong to a static multicast group, the
multicast routing protocol then takes the port as one that always receives and sends the multicast message of
the multicast group. To be better compatible with IGMP-Router V3, the static multicast group can be configured
to receive the multicast message from the designated source address, that is, the source-filter function is
added when the multicast message is received.
Run the following command in interface configuration mode to configure the static multicast group for a port:
Command Purpose
ip igmp static-group
{ * | group-address}
{
include
source-address | <cr> }
Configures the static multicast group attribute
for a port.
73.3.6 Configuring the IGMP Immediate-leave List
If IGMP V2 is started up on a port of the switch and the network that the port connects has only one IGMP
host, you can realize the Immediate Leave function of the IGMP host by configuring the IGMP Immediate-
leave list. According to the regulations of IGMP V2, when a host leaves a specific multicast group, the host will
send the Leave message to all multicast switches. After receiving the Leave message, the multicast switches
send the Group Specific message to confirm whether any multicast message to be received from or sent to
the multicast group by the host exists on the port. If the Immediate Leave function is configured, no message
need be interacted between the IGMP host and the multicast switch, the change of the multicast group member
IDs will not be delayed.
Note:
The command can be configured both in global configuration mode and in interface configuration
mode. The priority of the command configured in global configuration mode is higher than that
configured in interface configuration mode. If the command is first configured in global
configuration mode, the command configured in interface configuration mode will be omitted. If the
command is first configured in interface configuration mode, the command configured in global
configuration mode will delete the command configured in interface configuration mode.
For IGMP-Router V2, run the following command in interface configuration mode to configure the
IGMP Immediate-leave list:
Command Purpose
ip igmp immediate-leave group-list
list-
name
Configures the access list that realizes the
function to immediately leave the multicast
group for the IGMP host.
ip access-list standard
list-name
Creates a standard IP access list named
list-
name
.
permit
source-address
Configures the IP address for the IGMP host
that will realize the immediate-leave function
in standard access-list configuration mode.
The previous command is invalid to IGMP-Router V1 and IGMP-Router V3.
73.4 IGMP Characteristic Configuration Example
All configurations about the IGMP characteristics are performed in VLAN port.