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CLI-based Configuration Guide - Network Management and Monitoring

AR100, AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R009

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Configuring NetStream Flow Aging

Configuring NetStream Flow Aging

Context

When a NetStream flow is aged out, the device exports the flow statistics in the cache to the NSC using NetStream packets of a specified version.

NetStream flow aging modes include regular aging, byte-based aging, and forced aging. By default, the byte-based aging is enabled.

  • Regular aging

    • Active aging

      Active aging requires the device to periodically export statistics about the flows that persist for a long period. This aging mode is enabled on the device by default, and you only need to set the aging time.

    • Inactive aging

      Inactive aging clears unnecessary entries in the NetStream cache so that the system can fully leverage statistics entries. Inactive aging requires the device to export statistics about the flows that persist for a short period. Once adding packets to a flow stops, the device exports flow statistics to conserve memory space. This aging mode is enabled on the device by default, and you only need to set the aging time.

  • Forced aging

    Forced aging is used when you require the latest statistics, but you do not satisfy with the existing aging conditions or some flows fail to age out due to an anomaly. You can forcibly age out all the original flows in the cache and export the flow statistics.

Procedure

  • Configure regular aging.

    Configure active aging.

    1. Run the system-view command to enter the system view.
    2. Run the ip netstream aggregation timeout active active-interval command to set the active aging time of IPv4 aggregation flows.

      By default, the active aging time of IPv4 flows is 30 minutes.

    Configure inactive aging.

    1. Run the system-view command to enter the system view.
    2. Run the ip netstream aggregation timeout inactive inactive-interval command to set the inactive time of IPv4 aggregation flows.

      By default, the inactive aging time of IPv4 aggregation flows is 30 seconds.

  • Configure forced aging.
    1. Run the system-view command to enter the system view.
    2. Run the reset ip netstream cache command to forcibly age out all flows in the cache.
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Updated: 2019-05-17

Document ID: EDOC1000174072

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