3Com Switch 8800 Configuration Guide Chapter 25 Multicast VLAN Configuration25-2Item Command DescriptionAdd ports tocorrespondingVLANsport hybrid vlan vlan_id_listuntagged RequiredTo cancel the configurations, use the corresponding undo commands.Note:z A port can only belong to one multicast VLAN.z The type of the ports connected to user terminals must be hybrid untagged.25.3 Multicast VLAN Configuration ExampleI. Network requirementsThe following table describes the devices required in this example:Table 25-2 Device number and descriptionDevice Description RequirementSwitch A Layer 3 switchThe IP address of VLAN 2 interface is 168.10.1.1.The port E1/1/1 belongs to VLAN 2 and is connectedto the Workstation.The IP address of VLAN 10 interface is 168.20.1.1.The port E1/1/10 belongs to VLAN 10 and isconnected to Switch B.Configure layer 3 multicast PIM DM and IGMP onVLAN 10Switch B Layer 2 switchVLAN 2 contains the port E1/1/1 and VLAN 3contains the port E1/1/2. The ports E1/1/1 andE1/1/2 are connected to PC1 and PC2 respectively.The port E1/1/10 is connected to Switch A.PC 1 User 1 PC1 is connected to the port E1/1/1 of Switch B.PC 2 User 2 PC2 is connected to the port E1/1/2 of Switch B.Configure multicast VLAN to make users in VLAN 2 and VLAN 3 receive multicast flowthrough VLAN10.