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Configuration Guide - Network Management and Monitoring

CloudEngine 8800, 7800, 6800, and 5800 V200R005C10

This document describes the configurations of Network Management and Monitoring, including SNMP, RMON, NETCONF, OpenFlow, LLDP, NQA, Mirroring, Packet Capture, Packet Trace, Path and Connectivity Detection Configuration, NetStream, sFlow, and iPCA.
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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 only the aging time needs to be configured.

    • 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 only the aging time needs to be configured.

  • Forced aging

    Forced aging can be used when the latest statistics are needed, but the existing aging conditions have not been satisfied or some flows have failed to age out due to an anomaly. You can forcibly age out all the 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 netstream timeout ethernet active active-interval command to set the active aging time of Layer 2 NetStream flow statistics.

      By default, the active aging time of Layer 2 NetStream flow statistics is 30 minutes.

    3. Run the commit command to commit the configuration.

    Configure inactive aging.

    1. Run the system-view command to enter the system view.
    2. Run the netstream timeout ethernet inactive inactive-interval command to set the inactive time of Layer 2 NetStream flow statistics.

      By default, the inactive aging time of Layer 2 NetStream flow statistics is 30 seconds.

    3. Run the commit command to commit the configuration.
  • Configure forced aging.
    1. Run the reset netstream cache ethernet slot slot-id [ chip chip-id ] command in the user view to forcibly age out all Layer 2 NetStream flow statistics on the device.

      NOTE:

      Only the CE6880EI and CE5880EI support the chip chip-id parameter.

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Updated: 2019-04-20

Document ID: EDOC1100075365

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