Operation Manual – MulticastH3C S5600 Series Ethernet Switches Chapter 3 IGMP Configuration3-10To do... Use the command... RemarksEnter system view system-view —Enter interface view interface interface-typeinterface-number —In VLANinterfaceviewigmp group-policyacl-number [ 1 | 2 |port interface-list ]Configuring amulticast group filter In LoopBackinterfaceviewigmp group-policyacl-number [ 1 | 2 ]OptionalNo multicast groupfilter is configured bydefaultII. Configuring a multicast group filter in Ethernet port viewFollow these steps to configure a multicast group filter in Ethernet port view:To do... Use the command... RemarksEnter system view system-view —Enter Ethernet port view interface interface-typeinterface-number —Configuring a multicastgroup filterigmp group-policyacl-number vlan vlan-idOptionalNo multicast group filter isconfigured by default. Theport must belong to thespecified VLAN.3.2.7 Configuring Simulated JoiningGenerally, hosts running IGMP respond to the IGMP query messages of the IGMPquerier. If hosts fail to respond for some reason, the multicast router may consider thatthere is no member of the multicast group on the local subnet and remove thecorresponding path.To avoid this from happening, you can configure a port of the IGMP-enabled VLANinterface as a multicast group member. When the port receives IGMP query messages,the simulated member host will respond. As a result, the subnet attached to the Layer 3interface can continue to receive multicast traffic.Through this configuration, the following functions can be implemented:z When an Ethernet port is configured as a simulated member host, the switchsends an IGMP report through this port. Meanwhile, the simulated host sends thesame IGMP report to itself and establishes a corresponding IGMP entry based onthis report.
