> # Setting the Multicast Root Switch

> ## Detailed Steps

> To use the lowest domain switch for the multicast tree computation, follow these steps:

> 1. Expand a fabric, expand a VSAN, and then select Advanced for the VSAN that you want to configure FSPF on.

> You see the advanced Fibre Channel configuration in the Information pane.

> 2. Click the Multicast Root tab.

> You see the multicast root configuration in the Information pane.

> 3. Set the Config Mode drop-down menu to lowestDomainSwitch.
> 4. Click Apply Changes to save these changes or click Undo Changes to discard any unsaved changes.

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