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# 10. Diagram

## 10.1. General diagram

Below is a general diagram of the relationships of the components of a classful queuing discipline (HTB pictured). A larger version of the diagram is available.

Example 11. An example HTB tcng configuration

    /*
     *
     *  possible mock up of diagram shown at
     *  http://linux-ip.net/traffic-control/htb-class.png
     *
     */

    $m_web = trTCM (
                     cir 512  kbps,  /* commited information rate */
                     cbs 10   kB,    /* burst for CIR */
                     pir 1024 kbps,  /* peak information rate */
                     pbs 10   kB     /* burst for PIR */
                   ) ;

    dev eth0 {
        egress {

            class ( <$web> )  if tcp_dport == PORT_HTTP &&  __trTCM_green( $m_web );
            class ( <$bulk> ) if tcp_dport == PORT_HTTP && __trTCM_yellow( $m_web );
            drop              if                              __trTCM_red( $m_web );
            class ( <$bulk> ) if tcp_dport == PORT_SSH ;

            htb () {  /* root qdisc */

                class ( rate 1544kbps, ceil 1544kbps ) {  /* root class */

                    $web  = class ( rate 512kbps, ceil  512kbps ) { sfq ; } ;
                    $bulk = class ( rate 512kbps, ceil 1544kbps ) { sfq ; } ;

                }
            }
        }
    }

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