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# interface_param XPC Dictionary Keys

XPC dictionary keys used by the `interface_param` argument returned by the completion handler of the `vmnet` function that describes the parameters that should be used to configure the network interface.

## Topics

### Constants

[`vmnet_mac_address_key`](/documentation/vmnet/vmnet_mac_address_key)

The MAC address to configure on the virtual interface in the guest operating system.

[`vmnet_mtu_key`](/documentation/vmnet/vmnet_mtu_key)

The maximum transmission unit (MTU) to configure on the virtual interface in the guest operating system.

[`vmnet_max_packet_size_key`](/documentation/vmnet/vmnet_max_packet_size_key)

The maximum size of the packet that an app can write to the interface.


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