Operation Manual – MulticastH3C S7500 Series Ethernet Switches Chapter 3 IGMP Snooping Configuration3-7Caution:z Although both Layer 2 and Layer 3 multicast protocols can run on the same switchsimultaneously, they cannot run simultaneously in a VLAN or its correspondingvirtual interface.z Before enabling IGMP Snooping in VLAN view, you must enable IGMP Snoopingglobally in system view. Otherwise, the IGMP Snooping feature cannot be enabledin VLAN view.3.2.2 Configuring TimersThis configuration task is to manually configure the aging timer of the router port, theaging timer of the multicast member ports, and the query response timer.z If the switch receives no IGMP general query message from a router within theaging time of the router port, the switch removes the router port from the portmember lists of all MAC multicast groups.z If the switch receives no IGMP host report message, it sends an IGMPgroup-specific query message to the port and triggers the query response timer ofthe IP multicast group.z If the switch receives no IGMP host report message within the aging time of themember port, it sends an IGMP group-specific query message to the port andtriggers the query response timer of the IP multicast group.Follow these steps to configure timers:To do... Use the command... RemarksEnter system view system-view —Configure the agingtimer of the router portigmp-snoopingrouter-aging-timesecondsOptionalBy default, the aging time ofthe router port is 105seconds.Configure the queryresponse timerigmp-snoopingmax-response-timesecondsOptionalBy default, the queryresponse timeout time is 10seconds.Configure the agingtimer of the multicastmember portigmp-snoopinghost-aging-time secondsOptionalBy default, the aging time ofmulticast member ports is260 seconds.
