# Secondary VLAN

Device > Configure > Private VLAN > Secondary VLAN

This dialog box displays private VLAN information on the VLANs present in the VLAN edit buffer for a VTP management domain.

To view the definition for a particular MIB variable, click the appropriate link from the following list:

- Secondary VLAN Type (cpvlanVlanEditPrivateVlanType)
- Primary VLAN (cpvlanVlanEditAssocPrimaryVlan)

The following list specifies buttons in this dialog box, as well as their function:

- Click OK to continue.

- Click Apply to save the changes in the dialog box.

- Click Cancel to close the dialog box.

- Click Create to create the private VLAN structure.

- Click Refresh to update the contents of the dialog box.

- Click Print to print the contents of the dialog box.

- Click Help to access online help.

Secondary VLAN Type (cpvlanVlanEditPrivateVlanType)

Indicates the VLAN type, as defined for the private VLAN feature.

Note: A VLAN's private VLAN type cannot be changed once ports have been assigned to it.

Primary VLAN (cpvlanVlanEditAssocPrimaryVlan)

Identifier of the associated primary VLAN used for the private VLAN feature if the value of cpvlanVlanEditPrivateVlanType is either "isolated(3)", "community(4)", or "twoWayCommunity(5)". When the value of cpvlanVlanEditPrivateVlanType is either "normal(1)" or "primary(2)", then this object has a value of zero.

Please note the following:

- One isolated VLAN can be associated with only one unique primary VLAN. Similarly, one primary VLAN can be associated with only one isolated VLAN.
- One primary VLAN can be associated with multiple community or two-way community VLANs. However, the opposite is not true. One community or two-way community VLAN can be associated with only one unique primary VLAN.