Queuing Disciplines

The syntax for creating a queuing discipline is:

tc qdisc [ add | del | replace | change | get ] dev STRING
       [ handle QHANDLE ] [ root | parent CLASSID ]
       [ estimator INTERVAL TIME_CONSTANT ]
       [ [ QDISC_KIND ] [ help | OPTIONS ] ]

       tc qdisc show [ dev STRING ]
Where:
QDISC_KIND := { [p|b]fifo | tbf | prio | cbq | red | etc. }

The interpretation for the fields:

• handle represents the unique handle that is assigned by the user to the queuing discipline. No two queuing disciplines can have the same handle.
• root indicates that the queue is at the root of a link sharing hierarchy.
• parent represents the handle of the parent queuing discipline.
• estimator is used to determine if the requirements of the queue have been satisfied. The INTERVAL and the TIME_CONSTANT are two parameters that are of very high significance to the estimator. The way these parameters are set is described in [3].