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NE40E-M2 V800R010C10SPC500 Configuration Guide - WAN Access 01

This is NE40E-M2 V800R010C10SPC500 Configuration Guide - WAN Access
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Configuring Loopback on an E3 Interface

Configuring Loopback on an E3 Interface

To monitor the status of an E3 interface or the cable connected to the E3 interface, configure loopback on the E3 interface.

Context

Loopback can be either local loopback or remote loopback.

  • To locate a system fault, enable local loopback on an E3 interface.
  • To locate a link fault or test the link quality, enable remote loopback on an E3 interface.

Local loopback must be configured in master clock mode, and remote loopback must be configured in slave clock mode.

Running the loopback command will cause interfaces or links unable to work properly. Therefore, exercise caution when running the loopback command. After checking the interface or link status, immediately run the undo loopback command to disable loopback.

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run controller e3 controller-number

    The view of the E3 interface to be checked is displayed.

  3. Run loopback { local | remote }

    Loopback is enabled on the E3 interface.

    Note the following when enabling loopback on an interface:
    • The interface that has local loopback enabled must work in master clock mode.

    • The interface that has remote loopback enabled must work in slave clock mode.

    By default, loopback is disabled.

  4. Run commit

    The configuration is committed.

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Updated: 2019-01-02

Document ID: EDOC1100058399

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