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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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Enabling Loopback to Check Interface Status

Enabling Loopback to Check Interface Status

Loopback can be enabled to check whether links work properly.

Context

Running the loopback command on the Router to enable loopback may cause interfaces or links to be unable to work properly. Exercise caution when enabling loopback to check the interface or link status. After checking the interface or link status, run the undo loopback command to disable loopback in time.

Perform the following steps on the Router to be checked:

Procedure

  1. Run the system-view command to enter the system view.
  2. Run the interface atm interface-number command to enter the view of an ATM interface to be checked.
  3. Run the following command as required:

    • To check an ATM OC-3/STM-1 or ATM OC-12/STM-4 interface, run the loopback { local | remote } command.

    • To check an ATM E1 interface, run the loopback { local | remote } command.

    • To check an ATM E3 interface, run the loopback { local | remote } command.

    • To check whether the local service chip works properly, configure local.
    • To check whether the peer works properly, configure remote.

    By default, loopback is disabled.

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Updated: 2019-01-02

Document ID: EDOC1100058399

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