Direction defines enum 'direction'.

IfStatusFlags defines enum 'if_status_flags'.

IfType defines enum 'if_type'.

InterfaceIndex defines alias 'interface_index'.

LinkDuplex defines enum 'link_duplex'.

MtuProto defines enum 'mtu_proto'.

RxMode defines enum 'rx_mode'.

SubIfFlags defines enum 'sub_if_flags'.