2-10Configuring Static PortsIf all the hosts attached to a port are interested in the multicast data addressed to a particular multicastgroup or the multicast data that a particular multicast source sends to a particular group, you canconfigure static (*, G) or (S, G) joining on that port, namely configure the port as a group-specific orsource-and-group-specific static member port.You can configure a port of a switch to be a static router port, through which the switch can forward allthe multicast traffic it received.Follow these steps to configure static ports:To do... Use the command... RemarksEnter system view system-view —interface interface-typeinterface-numberEnter Ethernet interface/Layer2 aggregate interface view orport group view port-group manualport-group-nameRequiredUse either approachConfigure the port(s) as staticmember port(s)igmp-snooping static-groupgroup-address [ source-ipsource-address ] vlan vlan-idRequiredNo static member ports bydefaultConfigure the port(s) as staticrouter port(s)igmp-snoopingstatic-router-port vlan vlan-idRequiredNo static router ports by defaultz A static (S, G) joining can take effect only if a valid multicast source address is specified and IGMPsnooping version 3 is currently running.z A static member port does not respond to queries from the IGMP querier; when static (*, G) or (S, G)joining is enabled or disabled on a port, the port does not send an unsolicited IGMP report or anIGMP leave message.z Static member ports and static router ports never age out. To remove such a port, you need to usethe corresponding undo command.Configuring Simulated JoiningGenerally, a host running IGMP responds to IGMP queries from the IGMP querier. If a host fails torespond due to some reasons, the multicast router may deem that no member of this multicast groupexists on the network segment, and therefore will remove the corresponding forwarding path.To avoid this situation from happening, you can enable simulated joining on a port of the switch, namelyconfigure the port as a simulated member host for a multicast group. When receiving an IGMP query,the simulated host gives a response. Thus, the switch can continue receiving multicast data.A simulated host acts like a real host, as follows:z When a port is configured as a simulated member host, the switch sends an unsolicited IGMPreport through that port.
