Example: DLCI Class of Service
on a Channelized IQ Interface Configuration

This example applies class of service at the logical interface level on a clear channel T3 interface derived from a channelized DS3 IQ interface. (For more information on configuring a channelized DS3 IQ interface, see Example: Channelized DS3 IQ Interface Configuration.)

Configure a scheduler map, complete with the desired transmit rates, buffer sizes, and service classes. Once the scheduler map is ready, enable logical interface-level class of service with the per-unit-scheduler statement at the [edit interfaces interface-name] hierarchy level. Also, configure a DLCI for each logical interface with the dlci dlci-number statement at the [edit interfaces interface-name unit unit-number] hierarchy level. Finally, configure the logical interfaces for class of service with the scheduler-map and bandwidth statements at the [edit class-of-service interfaces interface-name unit unit-number] hierarchy level. These statements specify the scheduler map to associate with each logical interface and how much bandwidth to reserve for the DLCI queues.

[edit]

interfaces {

    ct3-3/1/0 {

        no-partition interface-type t3; # This converts the channelized DS3 IQ

    }                                                             # interface to a T3.

    t3-3/1/0 {

        per-unit-scheduler;                                    # This enables scheduling at the logical interface level.

        encapsulation frame-relay;

        unit 0 {                        # The logical interface where scheduler map sched-0 takes effect.

            dlci 100;                    # The DLCI affected by scheduler map sched-0.

            family inet {

                address 10.40.1.1/30;

            }

        }

        unit 1 {                        # The logical interface where scheduler map sched-1 takes effect.

            dlci 101;                    # The DLCI affected by scheduler map sched-1.

            family inet {

                address 10.40.2.1/30;

            }

        }

    }

}

class-of-service {

    interfaces {

        t3-3/1/0 {                        # This specifies the channel where the scheduled DLCI is located.

            unit 0 {                    # This specifies the logical interface for the first scheduled DLCI.

                scheduler-map sched-0; # This applies a scheduler map to the first DLCI.

                bandwidth 10m;                                    # This reserves bandwidth for scheduler map sched-0.

            }

            unit 1 {                # This specifies the logical interface for the second scheduled DLCI.

                scheduler-map sched-1; # Applies a scheduler map to the second DLCI.

                bandwidth 10m;                                    # This reserves bandwidth for scheduler map sched-1.

            }

        }

    }

    scheduler-maps {

        sched-0 {                        # This is where classes of service are associated with a scheduler.

            forwarding-class assured-forwarding scheduler af;

            forwarding-class best-effort scheduler be;

            forwarding-class expedited-forwarding scheduler ef;

        }

        sched-1 {                        # This is where classes of service are associated with a scheduler.

            forwarding-class assured-forwarding scheduler af-1;

            forwarding-class best-effort scheduler be-1;

            forwarding-class expedited-forwarding scheduler ef-1;

        }

    }

    schedulers {

        af {

            transmit-rate percent 10;

            buffer-size percent 10;

        }

        be {

            transmit-rate percent 20;

            buffer-size percent 20;

        }

        ef {

            transmit-rate percent 70;

            buffer-size percent 70;

        }

        af-1 {

            transmit-rate percent 10;

            buffer-size percent 10;

        }

        be-1 {

            transmit-rate percent 30;

            buffer-size percent 30;

        }

        ef-1 {

            transmit-rate percent 60;

            buffer-size percent 60;

        }

    }

}