SMC Networks 6724AL2, Management Manual

Page: 317 / 424

VLAN C
OMMANDS
3-129
• If a VLAN on the forbidden list for an interface is manually added to
that interface, the VLAN is automatically removed from the forbidden
list for that interface.
Example
The following example shows how to add VLANs 1, 2, 5 and 6 to the
allowed list as tagged VLANs for port 1:
switchport 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 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.
Console(config)#interface ethernet 1/1
Console(config-if)#switchport allowed vlan add 1,2,5,6 tagged
Console(config-if)#