> # Enabling Port Security

> By default, the port security feature is disabled in all switches in the Cisco MDS 9000 Family.

> ## Detailed Steps

> To enable port security, follow these steps:

> 1. Expand a VSAN, and then select Port Security in the Logical Domains pane.

> You see the port security configuration for that VSAN in the Information pane.

> 2. Click the CFS tab.
> 3. Enable CFS on all participating switches in the VSAN by clicking each entry in the Global column and selecting enable.
> 4. Click Apply Changes to enable CFS distribution for the port security feature.
> 5. Click the Control tab.

> You see the port security enable state for all switches in the selected VSAN.

> 6. Set the Command column to enable for each switch in the VSAN.
> 7. Click the CFS tab and set the Command column to commit on all participating switches in the VSAN.
> 8. Click Apply Changes to distribute the enabled port security to all switches in the VSAN.

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