Command Line Interface4-1864switchport forbidden vlanThis command configures forbidden VLANs. Use the no form to remove the list offorbidden VLANs.Syntaxswitchport forbidden vlan {add vlan-list | remove vlan-list}no switchport forbidden vlan• add vlan-list - List of VLAN identifiers to add.• remove vlan-list - List of VLAN identifiers to remove.• vlan-list - Separate nonconsecutive VLAN identifiers with a comma and nospaces; use a hyphen to designate a range of IDs. Do not enter leadingzeros. (Range: 1-4094).Default SettingNo VLANs are included in the forbidden list.Command ModeInterface Configuration (Ethernet, Port Channel)Command Usage• This command prevents a VLAN from being automatically added to thespecified interface via GVRP.• If a VLAN has been added to the set of allowed VLANs for an interface, thenyou cannot add it to the set of forbidden VLANs for that same interface.ExampleThe following example shows how to prevent port 1 from being added to VLAN 3:Displaying VLAN InformationConsole(config)#interface ethernet 1/1Console(config-if)#switchport forbidden vlan add 3Console(config-if)#Table 4-59 Show VLAN CommandsCommand Function Mode Pageshow vlan Shows VLAN information NE, PE 4-187show interfaces status vlan Displays status for the specified VLAN interface NE, PE 4-138show interfaces switchport Displays the administrative and operational status of aninterfaceNE, PE 4-140
