Command Manual – MulticastH3C S3600 Series Ethernet Switches-Release 1510 Chapter 5 IGMP Configuration Commands5-14Parameterseconds: Time (in seconds) during which the IGMP querier is present, in the range of 1to 131,070.DescriptionUse the igmp timer other-querier-present command to configure the presence timeof the IGMP querier.Use the undo igmp timer other-querier-present command to restore the defaultvalue.By default, the presence time of the IGMP querier is twice the value of IGMP querymessage interval, that is, 120 seconds.On a shared network, that is, the same network segment including multiple multicastrouters, the query router (also known as querier) is responsible for sending querymessages periodically through the VLAN interface. If other non-queriers receive noquery messages within the timer period, the router considers the previous querier to beinvalid and the router itself acts as a querier.In IGMP version 1, the selection of a querier is determined by the multicast routingprotocol. In IGMP version 2, the router with the lowest IP address on the sharednetwork segment acts as the querier.Related command: igmp timer query, display igmp interface.Example# Configure the querier to expire in 300 seconds. system-viewSystem View: return to User View with Ctrl+Z.[H3C] interface Vlan-interface 10[H3C-Vlan-interface10] igmp timer other-querier-present 3005.1.14 igmp timer querySyntaxigmp timer query secondsundo igmp timer queryViewVLAN interface viewParameterseconds: Interval at which a router transmits IGMP query messages, in the range of 1to 65,535 seconds.
