1-6To do… Use the command… DescriptionEnable transparent IGMPmessage transmission on theVLAN-VPN portigmp transparent enableRequiredBy default, transparent IGMPmessage transmission isdisabled on a VLAN-VPN port.Caution:z If your switch is required to process the IGMP messages received on a VLAN-VPN port (forexample, because IGMP or IGMP snooping is enabled on the port), you must disable transparentIGMP message transmission on the port so that the switch can process the IGMP messagesnormally.z Do not enable transparent IGMP message transmission on a port without VLAN-VPN enabled.Displaying and Maintaining VLAN-VPN ConfigurationTo do... Use the command... RemarksDisplay the VLAN-VPN configurationsof all the ports display port vlan-vpn Available in any viewVLAN-VPN Configuration ExampleTransmitting User Packets through a Tunnel in the Public Network by UsingVLAN-VPNNetwork requirementsAs shown in Figure 1-4, Switch A and Switch B are both Switch 5500-EI series switches. They connectthe users to the servers through the public network.z PC users and PC servers are in VLAN 100 created in the private network, while terminal users andterminal servers are in VLAN 200, which is also created in the private network. The VLAN VPNconnection is established in VLAN 1040 of the public network.z Switches of other vendors’ are used in the public network. They use the TPID value 0x9200.z Employ VLAN-VPN on Switch A and Switch B to enable the PC users and PC servers tocommunicate with each through a VPN, and employ VLAN-VPN on Switch A and Switch B toenable the Terminal users and Terminal servers to communicate with each other through a VPN.
