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AR Router Troubleshooting Guide

This Product Documentation provides guidance for maintaining AR Enterprise Router, covering common information collection and fault diagnostic commands, typical fault troubleshooting guide, and troubleshooting.
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Huawei uses machine translation combined with human proofreading to translate this document to different languages in order to help you better understand the content of this document. Note: Even the most advanced machine translation cannot match the quality of professional translators. Huawei shall not bear any responsibility for translation accuracy and it is recommended that you refer to the English document (a link for which has been provided).
Common G.SHDSL Interface Interconnection Faults

Common G.SHDSL Interface Interconnection Faults

This section provides typical cases about the G.SHDSL interface interconnection.

Fault Symptom

The G.SHDSL interface cannot be activated for a long time or alternates between Up and Down.

Possible Causes

  • The ADSL/VDSL splitter is used on the G.SHDSL line.
  • The G.SHDSL cable is not the matching one.
  • The DSLAM connected to the router uses an old G.SHDSL chip.
  • There are electromagnetic interference sources such as electric motors, transformers, and electric generator along the G.SHDSL line.

Troubleshooting Procedure

  1. Check whether the ADSL/VDSL splitter is used on the G.SHDSL line.
  2. Check whether the G.SHDSL cable is the matching one.

    Figure 12-2 shows the matching cables of the AR.
    Figure 12-2  Matching cables of the AR

  3. If the fault is not rectified, run the following command to configure the compatibility mode of the G.SHDSL uplink interface:

    [Huawei-Atm0/0/0]shdsl capability g-shdsl.bis
    [Huawei-Atm0/0/0]shdsl compatibility pmms normal vendor gs enhanced filter normal
    [Huawei-Atm0/0/0]undo shutdown 

    If the fault persists, run the following command:

    [Huawei-Atm0/0/0]shdsl compatibility pmms long vendornormal filter normal
    [Huawei-Atm0/0/0]undo shutdown 

  4. Leave the G.SHDSL line far away form the electromagnetic interference sources.


    Performing the preceding operations can solve most interconnection problems of the G.SHDSL interface.

Updated: 2019-05-10

Document ID: EDOC1000079719

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