Junos OS


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QoS interaction between Shaping-Rate and Schedulers

  • 1.  QoS interaction between Shaping-Rate and Schedulers

    Posted 08-04-2021 08:59


    I am was looking at configuring "Shaping Rate" at physical level to limit outbound traffic on an interface. 

    My question is, if I apply a  scheduler, does it use base "transmit-rate" based on full internet BW or based on the "shaping rate" on physical interface?

    Will Scheduler Golds guaranteed transmit-rate be 20m or 2g?

    Example config: 

        schedulers {
            GOLD {
                transmit-rate percent 20;
                buffer-size percent 20;
                priority strict-high;
        scheduler-maps {
            TEST {
                forwarding-class GOLD scheduler GOLD;

    class-of-service {
        interfaces {
            xe-0/0/0 {
                shaping-rate 100m;
                scheduler-map TEST;