6-13To do... Use the command... RemarksEnter VLAN view vlan vlan-id —Configure a specified port as astatic router portmulticast static-router-portinterface-type interface-numberRequiredBy default, no static router port isconfigured.Disabling a Port from Becoming a Router PortA MAC-forced forwarding (MFF) network isolates hosts at Layer 2 and allows multicast packets to passthrough user ports. However, the following case may occur:If host A joins a multicast group, it sends IGMP membership reports, and then the switch connected to itforwards the messages out every router port. If the user port on the switch connecting to host Bbecomes a router port, host B may receive the IGMP membership report, and thus obtain otherinformation of host A from the message.To avoid this, you can disable a port of the S5600 series switches from becoming a router port so thatthis port will not forward IGMP membership report messages.Follow these steps to disable a port from becoming a router port:To do... Use the command... RemarksEnter system view system-view —Enter Ethernet port view interface interface-typeinterface-number —Disable the port frombecoming a router port igmp-snooping query-pkt-deny RequiredNot disabled by default.z This feature is recommended in MFF networks only.z For details about MFF, refer to ARP Operation.Configuring a Port as a Simulated Group MemberSimulated joining in IGMP Snooping is implemented in the same way as in IGMP except that IGMPSnooping establishes and maintains IGMP Snooping entries.Enabling simulated joining in VLAN interface viewFollow these steps to enable simulated joining in VLAN interface view:To do… Use the command… RemarksEnter system view system-view —Enter VLAN interface view interface Vlan-interface interface-number —Enable simulated joining igmp host-join group-address [ source-ipsource-address ] port interface-listRequiredDisabled by default
