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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
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:
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