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3-102switchport 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-list | remove vlan-list}
no switchport forbidden vlan
add vlan-list - List of VLAN IDs to add.
remove vlan-list - List of VLAN IDs to remove.
Separate nonconsecutive VLAN IDs with a comma and no spaces;
use a hyphen to designate a range of IDs. 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 via GVRP.
Example
The following example shows how to prevent port 1 fro m being added to
VLAN 3:
Console(config)#interface ethernet 1/1
Console(config-if)#switchport forbidden vlan add 3
Console(config-if)#