Example

The following example shows how to add VLANs 1, 2, 5 and 6 to the allowed list as tagged VLANs for port SNP1:

Console(config)#interface ethernet SNP1

Console(config-if)#switchport allowed vlan add 1 tagged

Console(config-if)#switchport allowed vlan add 2 tagged

Console(config-if)#switchport allowed vlan add 5 tagged

Console(config-if)#switchport allowed vlan add 6 tagged

Console(config-if)#

4.3.12.9switchport forbidden vlan

Use this command to configure forbidden VLANs. Use the no form to remove the list of forbidden VLANs.

Syntax

switchport forbidden vlan {add vlan remove vlan}

no switchport forbidden vlan

add vlan – VLAN ID to add.

remove vlan – VLAN ID to remove.

Do not enter leading zeroes. (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 through 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.

Chapter 4 Command-Line Reference 4-129

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Sunfire B1600 manual Switchport forbidden vlan