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Configuration Guide - Device Management

S9300, S9300E, and S9300X V200R012C00

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 the CSS Physical Port-Down Delay Function

Configuring the CSS Physical Port-Down Delay Function

Context

In long-distance clustering, there may be a transmission device between two devices in a CSS. When an active/standby switchover is performed on the transmission device, CSS ports on both ends will become Down, causing the CSS to split. After the CSS port-Down delay function is configured, the event that CSS ports become Down for a short period within 500 ms will not be reported to the control plane, preventing the CSS from splitting.

NOTICE:
  • This function is not supported in a CSS set up using VSTSA CSS cards.

  • This function is mainly used in long-distance clustering. If the CSS is set up using copper cables or active optical cables (AOCs), do not use this function.
  • During the delay after which physical member ports become Down, if the configured response time of 802.1ag, BFD, and MPLS_OAM is short, these protocols will flap. For example, if the configured response time of BFD is within 100 ms, temporary packet loss may cause BFD to flap.

  • During the delay after which physical member ports become Down, some packets forwarded between chassis will be lost.

Procedure

  1. Run the system-view command to enter the system view.
  2. Run the css link-down-delay command to configure the CSS physical port-Down delay function.

    By default, the CSS physical port-Down delay function is not configured.

Verifying the Configuration

  • Run the display current-configuration | include css command to view the CSS physical port-Down delay function configuration.
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Updated: 2018-09-03

Document ID: EDOC1100038289

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