Displaying and Maintaining IGMP Snooping 427■ You will fail to configure a port to be a static routing port if the VLAN identifiedby the vlan-id argument does not exist or the port does not belong to theVLAN.■ You can configure multiple ports in a VLAN to be static routing ports byperforming the above configuration repeatedly. The newly configured ports donot replace the existing static routing ports.■ When a trunk port belongs to multiple VLANs, this port can be configured asthe static routing port for multiple VLANs.■ Static routing ports can be configured in VLAN view or Ethernet port view.However, you can verify the configured static routing ports only by executingthe display this command in Ethernet port view.■ The configuration of a static routing port takes effect on the current port only,no matter whether the current port is an aggregated port or not. To configureall ports in an aggregation group as static routing ports, you can enable thestatic routing port function on all the ports in the aggregation group.■ Static routing port is valid when IGMP-snooping, IGMP, PIM-DM or PIM-SM isenabled in the VLAN.Displaying andMaintaining IGMPSnoopingAfter the above configuration, execute display command in any view to displaythe running of the IGMP Snooping configuration, and to verify the effect of theconfiguration.Use the debugging mpm command in user view to carry out multicastdebugging.IGMP SnoopingConfigurationExampleEnable IGMP Snooping Network requirementsTo implement IGMP Snooping on the switch, you need to enable IGMP Snoopingon the switch first. The switch is connected with the router via the router port, andconnected with user PC through the non-router ports.Table 420 Display and debug IGMP SnoopingOperation CommandDisplay the information about current IGMPSnooping configuration display igmp-snooping configurationDisplay IGMP Snooping statistics of receivedand sent messages display igmp-snooping statisticsDisplay IP/MAC multicast group information inthe VLANdisplay igmp-snooping group [ vlanvlan-id[group-address] ]Enable IGMP Snooping debugging debugging mpm { abnormal | all | event |forward | groups | packets | timer }Clear IGMP Snooping statistics information reset igmp-snooping statistics
