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    ingress (Buffer Configuration)

    Syntax

    ingress {
    buffer-partition (lossless | lossless-headroom | lossy) {percent percent;}percent percent;}

    Hierarchy Level

    Release Information

    Statement introduced in Junos OS Release 12.3 for the QFX Series.

    Description

    Configure the global shared buffer pool allocation for ingress traffic. The system allocates the shared buffer pool dynamically across its ports as the ports require memory space. Some buffer space is reserved for buffers such as dedicated buffers (buffers allocated permanently to ports) and headroom buffers (buffers that help prevent packet loss on lossless flows).

    The percentage you specify is the percentage of available (user-configurable) buffer space allocated to the global shared ingress buffer pool. If you allocate less than 100 percent of the available buffer space to the shared buffer pool, the remaining buffer space is added to the dedicated buffer pool. (You cannot directly configure the dedicated buffer pool for each port; dedicated buffers are allocated evenly across all the ports.)

    Caution: Changing the buffer configuration is a disruptive event. Traffic stops on all ports until buffer reprogramming is complete.

    You can also partition the shared buffer pool to adjust the ingress buffer allocations for different mixes of network traffic using the buffer-partition statement.

    Default

    The default shared buffer percentage is 100 percent. (All available buffer space is allocated to the shared buffer pool.)

    Options

    percent percent—Percentage of available ingress buffer space allocated to the shared buffer pool. If the percentage is less than 100 percent, the remaining buffer space is allocated to the dedicated buffer pool.

    The remaining statement is explained separately.

    Required Privilege Level

    interfaces—To view this statement in the configuration.
    interface-control—To add this statement to the configuration.

     

    Related Documentation

     

    Published: 2014-07-23

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