> # Configuring Trunk Mode

> ## Detailed Steps

> To configure trunk mode using DCNM-SAN, follow these steps:

> 1. Expand FC Interfaces, and then select Physical. You see the interface configuration in the Information pane.
> 2. Click the Trunk Config tab to modify the trunking mode for the selected interface.
> 3. Make changes to the Admin and Allowed VSANs values.
> 4. Click the Trunk Failures tab to check if a link did not come up.

> You see the reason listed in the FailureCause column.

> 5. Click the Apply Changes icon.

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