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Configuration Guide - Device Management

S7700 and S9700 V200R013C00

This document describes the configurations of Device Management, including device status query, hardware management, CSS, SVF, PoE, OPS, OIDS, energy-saving management, information center, fault management, NTP, synchronous ethernet, PTP.
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Configuring Thresholds for the CSS Port Error-Down Function

Configuring Thresholds for the CSS Port Error-Down Function

Context

In a CSS, CSS ports may continuously receive CRC error packets or alternate between Up and Down states because CSS cards are swapped or the voltage is unstable. In this case, packets are dropped on the CSS ports, affecting services. To prevent this problem, a switch supports the CSS port error-down function. A CSS port is automatically shut down if the number of CRC error packets received or the number of Up/Down transitions on the CSS port in a specified period reaches the threshold. Traffic on this CSS port is then switched to another port. You can set the threshold according to network requirements.

Procedure

  1. Run the system-view command to enter the system view.
  2. Run the css port { crc | link-flap } trigger error-down command to enable the error-down function when CSS ports receive CRC error packets or frequently alternate between Up and Down states.

    By default, the error-down function is enabled for CSS ports.

  3. Run the css port crc trigger { interval time | threshold number } * command to configure the CRC error packet detection thresholds for CSS ports.

    By default, the threshold for the period during which CRC error packets are received on a CSS port is 3 minutes, and the threshold for the number of CRC error packets received per minute is 10.

  4. Run the css port link-flap trigger { interval time | threshold number } * command to configure the flapping detection thresholds for CSS ports.

    By default, the threshold for the period during which a CSS port alternates between Up and Down states is 3 minutes, and the threshold for the number of Up/Down transitions per minute is 10.

  5. Run the css port { crc | link-flap } trigger error-down auto-recovery-interval time command to enable the error-down recovery function for CSS ports.

    By default, the error-down recovery function is disabled for CSS ports.

    To enable CSS ports that are shut down by the error-down function to automatically go Up, enable the error-down recovery function for CSS ports.

Verifying the Configuration

  • Run the display current-configuration | include css command to view the error-down function configuration.
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Updated: 2019-04-20

Document ID: EDOC1100065738

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