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   tc    ( 8 )

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Именование (Naming)

All qdiscs, classes and filters have IDs, which can either be
       specified or be automatically assigned.

       IDs consist of a major number and a minor number, separated by a
       colon - major:minor.  Both major and minor are hexadecimal
       numbers and are limited to 16 bits. There are two special values:
       root is signified by major and minor of all ones, and unspecified
       is all zeros.

       QDISCS A qdisc, which potentially can have children, gets
              assigned a major number, called a 'handle', leaving the
              minor number namespace available for classes. The handle
              is expressed as '10:'.  It is customary to explicitly
              assign a handle to qdiscs expected to have children.

       CLASSES
              Classes residing under a qdisc share their qdisc major
              number, but each have a separate minor number called a
              'classid' that has no relation to their parent classes,
              only to their parent qdisc. The same naming custom as for
              qdiscs applies.

       FILTERS
              Filters have a three part ID, which is only needed when
              using a hashed filter hierarchy.