H3C S7500 Series Ethernet Switches Command Manual

Command Manual – Multicast
H3C S7500 Series Ethernet Switches Chapter 5
IGMP Configuration Commands
5-14
IGMP query router considers it as timeout and stops membership maintenance for the
group.
This command is only available on the IGMP query router running IGMPv2. For the
host running IGMPv1, this command cannot take effect because the host does not
send IGMP Leave messages when it leaves a group.
Related commands: igmp lastmember-queryinterval, display igmp interface.
Examples
# Set the robust value of the VLAN-interface 10 to 3.
<H3C> system-view
System View: return to User View with Ctrl+Z.
[H3C] interface Vlan-interface 10
[H3C-Vlan-interface10] igmp robust-count 3
5.1.14 igmp timer other-querier-present
Syntax
igmp timer other-querier-present seconds
undo igmp timer other-querier-present
View
VLAN interface view
Parameters
seconds: Presence time of the IGMP querier, in the range of 1 to 131,070 in seconds.
Description
Use the igmp timer other-querier-present command to configure the presence time
of the IGMP querier.
Use the undo igmp timer other-querier-present command to restore the default
value.
By default, the presence time of the IGMP querier is twice the value of IGMP query
message interval, that is, 120 seconds.
On a shared network with multiple multicast routers on the same network segment, the
query router (querier for short) takes charge of sending query messages periodically on
the interface. If other non-queriers receive no query messages within the valid period,
the router will consider the previous querier to be invalid and the router itself becomes a
querier.