def create_non_8021Q_vea_cmd(lpar_id, slot_num, port_vlan_id):
    """
    Generate HMC command to create a non-8021Q virtual ethernet adapter

    :param lpar_id: LPAR id
    :param slot_num: virtual adapter slot number
    :param port_vlan_id: untagged port vlan id
    :returns: A HMC command to create a non 8021Q veth adapter based on
              the specification from input.
    """
    return ("chhwres -r virtualio --rsubtype eth -o a -s %(slot)s "
            "--id %(lparid)s -a ieee_virtual_eth=0,port_vlan_id=%(pvid)s,"
            "is_trunk=1,trunk_priority=1" %
            {'slot': slot_num, 'lparid': lpar_id, 'pvid': port_vlan_id})