User guide

376 Brocade 6910 Ethernet Access Switch Configuration Guide
53-1002581-01
GVRP and Bridge Extension Commands
20
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: 1-4093).
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.
• 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
Command Mode
Interface Configuration (Ethernet, Port Channel)
Command Usage
GVRP cannot be enabled for ports set to Access mode using the switchport mode command.