System information

3-93
VLAN Commands
3
private-vlan
Use this command to create a primary or secondary (i.e., community) private VLAN.
Use the no form to remove the specified private VLAN.
Syntax
private-vlan vlan-id {community | isolated | primary}
no private-vlan vlan-id
• vlan-id - ID of private VLAN. (Range: 1-4093, no leading zeroes).
• community – Specifies a community VLAN.
• primary – Specifies a primary VLAN.
• isolated – Specifies an isolated VLAN.
Default Setting
None
Command Mode
VLAN Configuration
Command Usage
• Private VLANs are used to restrict traffic to ports within the same VLAN
“community,” and channel traffic passing outside the community through
promiscuous ports that have been mapped to the associated “primary” VLAN.
• Port membership for private VLANs is static. Once a port has been assigned
to a private VLAN, it cannot be dynamically moved to another VLAN via
GVRP.
• Private VLAN ports cannot be set to trunked mode. (See “switchport mode” on
page 3-86.)
Example
Console(config)#vlan database
Console(config-vlan)#private-vlan 2 primary
Console(config-vlan)#private-vlan 3 community
Console(config)#