> # NPV and Port Security Configuration Guidelines

> Port security is enabled on the NPV core switch on a per interface basis. To enable port security on the NPV core switch for devices logging in via NPV, you must adhere to the following requirements:

> - The internal FLOGI must be in the port security database so that, the port on the NPV core switch will allow communications and links.
> - All of the end device pWWNs must also be in the port security database.

> Once these requirements are met, you can enable port security as you would in any other context. For details about enabling port security, see the Cisco MDS 9000 Family NX-OS Security Configuration Guide.

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