The [QuickFairQueueingClass] section manages the traffic control
       class of Quick Fair Queueing (qfq).
       Parent=
           Configures the parent Queueing Discipline (qdisc). Takes one
           of "root", or a qdisc identifier. The qdisc identifier is
           specified as the major and minor numbers in hexadecimal in
           the range 0x1–Oxffff separated with a colon ("major:minor").
           Defaults to "root".
       ClassId=
           Configures the unique identifier of the class. It is
           specified as the major and minor numbers in hexadecimal in
           the range 0x1–Oxffff separated with a colon ("major:minor").
           Defaults to unset.
       Weight=
           Specifies the weight of the class. Takes an integer in the
           range 1...1023. Defaults to unset in which case the kernel
           default is used.
       MaxPacketBytes=
           Specifies the maximum packet size in bytes for the class.
           When suffixed with K, M, or G, the specified size is parsed
           as Kilobytes, Megabytes, or Gigabytes, respectively, to the
           base of 1024. When unset, the kernel default is used.