Igmp Timer Other-Querier-Present - 3Com 8807 Command Reference Manual

IGMP Configuration Commands 613
Parameter
robust-value: IGMP robust value, number of times the IGMP query router sends
IGMP group query message after it receives the IGMP Leave message from the
host. the value range is 2 to 5. The default value is 2.
Description
Use the igmp robust-count command to set the number of times the IGMP
query router sends IGMP group query message after it receives the IGMP Leave
message from the host.
Use the undo igmp robust-count command to restore the default value.
Related commands: igmp lastmember-queryinterval, display igmp interface.
Example
# Set the robust value at the Vlan-interface 10 to 3.
<SW8800> system-view
System View: return to User View with Ctrl+Z.
[SW8800]interface vlan-interface 10
[3Com-Vlan-interface10] igmp robust-count 3
igmp timer Syntax
other-querier-present
igmp timer other-querier-present seconds
undo igmp timer other-querier-present
View
Interface view
Parameter
seconds: IGMP querier present timer value in second ranging from 1 to 131070.
By default, the value is twice the value of IGMP query message interval, i.e., 120
seconds.
Description
Use the igmp timer other-querier-present command to configure the timer of
presence of the IGMP querier.
Use the undo igmp timer other-querier-present command to restore the
default value.
On a shared network, i.e., there are 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 query
to be invalid and the router itself becomes a querier.
In IGMP version 1, the selection of a query is determined by the multicast routing
protocol. In IGMP version 2, the router with the smallest IP address on the shared
network segment acts as the querier.
Related command: igmp timer query and display igmp interface.