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Class of Service

  • Support for low-latency queuing (ACX7024, ACX7100-32C, ACX7100-48L, and ACX7509)—Starting in Junos OS Evolved Release 23.4R1, the listed ACX7000 routers support low-latency queuing (LLQ) for both port-level and hierarchical scheduling. LLQ enables delay-sensitive data to have preferential treatment over other traffic. A queue configured as a low-latency queue has higher priority over any other priority queues, including strict-high queues.

    To configure a queue as a low latency queue, set priority low-latency at the [set class-of-service schedulers scheduler-name] hierarchy level and apply the scheduler to the relevant forwarding class.

    [See Schedulers Overview for ACX Series Routers.]

  • Support for six scheduler priority levels (ACX7024, ACX7100-32C, ACX7100-48L, and ACX7509)—In releases earlier than Junos OS Evolved Release 23.4R1, ACX7000 Series routers supported two scheduler priority levels: strict-high and low. Starting with Junos OS Evolved 23.4R1, the listed ACX7000 routers support six scheduler priority levels. The levels are, in order of priority:

    • low-latency
    • strict-high
    • high
    • medium-high
    • medium-low
    • low

    This support is for both port-level and hierarchical scheduling.

    [See Schedulers Overview for ACX Series Routers.]