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Command Usage
• This c ommand 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.
Example
The following example shows how to prevent port 1 from being add ed to
VLAN 3:
Displaying VLAN Information

show vlan

This command shows VLAN information.
Syntax
show vlan [id vlan-id | name vlan-name]
id - Keyword to be followed by the VLAN ID.
-vlan-id - ID of the configured VLAN. (Range: 1-4094, no leading
zeroes)
name - Keyword to be followed by the VLAN name.
-vlan-name - ASCII string from 1 to 32 characters.
Console(config)#interface ethernet 1/1
Console(config-if)#switchport forbidden vlan add 3
Console(config-if)#
Command Function Mode Page
show vlan Shows VLAN information NE,
PE
3-64
show interfaces status
vlan
Displays status for the specified VLAN interface NE,
PE
3-11
show interfaces
switchport
Displays the administrative and operational
status of an interface
NE,
PE
3-14