> # Allowing the Host to Change FICON Port Parameters

> By default, mainframe users are not allowed to configure FICON parameters on Cisco MDS switches—they can only query the switch.

> ## Detailed Steps

> To allow the host (mainframe) to configure FICON parameters on the Cisco MDS switch, follow these steps:

> 1. Choose VSAN > FICON.

> You see a list of switches under the Control tab in the Information pane.

> 2. Click the VSANs tab.

> You see the FICON VSAN configuration information in the Information pane.

> 3. Check the Port Control By Host check box to allow the mainframe to control a switch.
> 4. Click the Apply Changes icon to save the changes.

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