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CLI-based Configuration Guide - Interface Management

AR100, AR120, AR160, AR1200, AR2200, AR3200, and AR3600 V300R003

This document provides the basic concepts, configuration procedures, and configuration examples of the interfaces supported by the device.
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Configuring Virtual Cable Test

Configuring Virtual Cable Test

Context

NOTE:

The AR120 series, AR161, AR161W, AR161EW, AR161EW-M1, AR161G-L, AR161G-Lc, AR161G-U, AR169, AR169W, AR169EW, AR169CVW, AR169EGW-L, AR169CVW-4B4S, AR169G-L, AR169-P-M9, AR169W-P-M9, AR169RW-P-M9 do not support the VCT configuration.

Interfaces on the 4GE-2S cards do not support the VCT configuration.

Virtual cable test (VCT) technology uses time domain reflectometry (TDR) to detect the cable status. When a pulse is transmitted to the end of a cable or a failure point in the cable, some pulse energies are reflected to the transmitting end. The VCT algorithm measures the time spent on transmitting pulses over a cable, reaching a failure point, and returning the pulses. The measured time is converted to the distance.

VCT can detect the fault type of a network cable and identify failure points to help locate network cable faults.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run interface interface-type interface-number

    The interface view is displayed.

  3. Run virtual-cable-test

    The VCT function is configured.

    NOTE:
    • The test result is only for reference and may be inaccurate for cables from some vendors.
    • Running the virtual-cable-test command may affect services on the interface in a short period of time.
    • Combo electrical interfaces support VCT.
    • Before performing a virtual cable test, shut down the remote interface or remove the network cable between the local and remote interfaces. Otherwise, signals from the remote interface may make the test result inaccurate.

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Updated: 2019-03-06

Document ID: EDOC1100069331

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