Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide Chapter 2 IGMP Configuration Commands
3Com Corporation
2-12
View
Interface view
Parameter
seconds: Interval at which the router sends the IGMP query messages, in second. It
ranges from 1 to 65535. By default, the value is 60 seconds.
Description
Use the igmp timer query command to configure the interval at which a router
interface sends IGMP query messages.
Use the undo igmp timer query command to restore the default value.
A multicast router sends IGMP query messages at intervals to find out whether there
are multicast group members on the network. The query interval can be modified
according to the practical conditions of the network.
Related command: igmp timer other-querier-present.
Example
# Configure the interval at which multicast router Ethernet1/0/0 sends IGMP query
packet to 125 seconds.
[3Com-Ethernet1/0/0] igmp timer query 125
2.1.15 igmp version
Syntax
igmp version { 1 | 2 }
undo igmp version
View
Interface view
Parameter
1: IGMP Version 1.
2: IGMP Version 2. By default, IGMP Version 2 is used.
Description
Use the igmp version command to specify the version of IGMP that a router uses.
Use the undo igmp version command to restore the default value.
All systems running in the same sub-network must support the same version of IGMP.
When a router finds the system of Version 1, it cannot switch to Version 1 by itself.