3Com Switch 7750 SeriesCommand Reference Guide – 802.1x Chapter 1 802.1x Configuration Commands1-8where interface-type specifies the type of a port and interface-num identifies the portnumber. "&<1-10>" means that up to 10 port indexes/port index lists can be provided.DescriptionUse the dot1x guest-vlan command to enable the Guest VLAN function for specifiedports.Use the undo dot1x guest-vlan command to disable the Guest VLAN function forspecified ports.When being executed in system view:z If you do not provide the interface-list argument, these two commands apply to allports of the switch.z If you specify the interface-list argument, these two commands apply to thespecified Ethernet ports.When being executed in Ethernet port view, these two commands apply to the currentEthernet port only. In this case, the interface-list argument is not needed.Caution:z The Guest VLAN function is available only when the switch operates in a port-basedauthentication mode.z Only one Guest VLAN can be configured for each switch.z The Guest VLAN function is unavailable when the dot1x dhcp-launch command isconfigured on the switch, because the switch does not send authentication requestpackets.Related commands: name, vlan-assignment-mode.Example# Specify the authentication method to be port-based authentication.<3Com>system-viewSystem View: return to User View with Ctrl+Z.[3Com] dot1x port-method portbased# Enable the Guest VLAN function for all ports.[3Com] dot1x guest-vlan 1