C
HAPTER
36
| VLAN Commands
GVRP and Bridge Extension Commands
– 1128 –
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-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.
(Range: 1-4094).
DEFAULT SETTING
No VLANs are included in the forbidden list.
COMMAND MODE
Interface Configuration (Ethernet, Port Channel)
COMMAND USAGE
â—† This command prevents a VLAN from being automatically added to the
specified interface via GVRP.
â—† 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.
â—† GVRP cannot be enabled for ports set to Access mode (see the
switchport mode command).
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)#
switchport gvrp This command enables GVRP for a port. Use the no form to disable it.
SYNTAX
[no] switchport gvrp
DEFAULT SETTING
Disabled
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