4 Command Line Interface

switchport forbidden vlan

This command configures forbidden VLANs. Use the no form to remove the list of forbidden VLANs.

Syntax

switchport forbidden vlan {add vlan-listremove 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 no spaces; use a hyphen to designate a range of IDs. Do not enter leading zeros. (Range: 1-4094).

Default Setting

No VLANs are included in the forbidden list.

Command Mode

Interface Configuration (Ethernet, Port Channel)

Command Usage

This command prevents a VLAN from being automatically added to the specified interface via GVRP.

If a VLAN has been added to the set of allowed VLANs for an interface, then you cannot add it to the set of forbidden VLANs for that same interface.

Example

The following example shows how to prevent port 1 from being added to VLAN 3:

Console(config)#interface ethernet 1/1

Console(config-if)#switchport forbidden vlan add 3

Console(config-if)#

Displaying VLAN Information

Table 4-59 Show VLAN Commands

Command

Function

Mode

Page

show vlan

Shows VLAN information

NE, PE

4-187

 

 

 

 

show interfaces status vlan

Displays status for the specified VLAN interface

NE, PE

4-138

 

 

 

 

show interfaces switchport

Displays the administrative and operational status of an

NE, PE

4-140

 

interface

 

 

4-186

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Accton Technology ES3526XA manual Displaying Vlan Information, Switchport forbidden vlan, Show Vlan Commands Function Mode