H3C S7500 Series Ethernet Switches Command Manual

Table Of Contents
Command Manual – Multicast
H3C S7500 Series Ethernet Switches Chapter 5
IGMP Configuration Commands
5-9
Examples
# Add Ethernet 1/0/1 in VLAN-interface10 to multicast group 225.0.0.1.
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C] interface Vlan-interface 10
[H3C-Vlan-interface10] igmp enable
[H3C-Vlan-interface10] quit
[H3C] interface Ethernet 0/1
[H3C-Ethernet0/1] port access vlan 10
[H3C-Ethernet0/1] igmp host-join 225.0.0.1 vlan 10
5.1.9 igmp lastmember-queryinterval
Syntax
igmp lastmember-queryinterval seconds
undo igmp lastmember-queryinterval
View
VLAN interface view
Parameters
seconds: Interval for the IGMP querier to send IGMP group-specific query messages
when it receives IGMP leave messages from the host. It is in the range of 1 second to 5
seconds.
Description
Use the igmp lastmember-queryinterval command to set the interval for the IGMP
querier to send IGMP group-specific query messages when it receives IGMP leave
messages from the host.
Use the undo igmp lastmember-queryinterval command to restore the default value.
The interval for the IGMP querier to send IGMP group-specific query messages is one
second by default.
In the shared network, that is, a same network segment including multiple hosts and
multicast routers, the query router (also known as querier) is responsible for
maintaining the IGMP group membership on the VLAN interface. When an IGMPv2
host leaves a group, it sends an IGMP leave message.
When receiving the IGMP leave message, the IGMP querier must send the IGMP
group-specific query messages for specified times (by the robust-value argument in the
igmp robust-count command, with default value as 2) in a specified time interval (by
the seconds argument in the igmp lastmember-queryinterval command, with default