User Manual

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Users Manual of XGS-6350-24X4C
For IGMP-Router V2 and IGMP-Router V3, run the following command in interface configuration mode to
configure the IGMP query interval of the last group member:
Command Purpose
ip igmp
last-member-query-intervaltime
Configures the IGMP query interval of
the last group member (unit: ms).
The previous command is useless for IGMP-Router V1.
50.3.2.6 Static IGMP Configuration
Besides the functions regulated by the IGMP-Router protocol, BODCOM’s switches support the static
multicast group configuration on the port. For the IGMP host, its multicast group member relationship may
vary. Suppose the IGMP host only belongs to the multicast group group1, it receives the multicast message
from and sends the multicast message to the multicast group group1. After a period of time, it may belong to
the multicast group group2, and receives the multicast message from and sends the multicast message to
the multicast group group2. After another period of time, the IGMP host may not belong to any multicast
group. Therefore, 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}
{includesource-address | <cr> }
Configures the static multicast group
attribute for a port.
50.3.2.7 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.
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 comma
nd
is first configured in global configuration mode, the command configured in