Thank's for you help !
here is how I solved my problem.
I followed this procedure :
6.5 Reinstalling the System Software
If services cannot run properly due to decoder system software faults, you can refer to this topic to reinstall the system software.
Prerequisites
- You have obtained the decoder installation package decoder.zip. To obtain the decoder installation package, log in to Huawei enterprise technical support, choose , click the Downloads tab, select V100R002C30SPC200, and download the DEC6108 Product Package.zip software package. Decompress the package and obtain decoder.zip package.
- Ensure that the current number of SSH users who log in to the decoder is 1 and the user does not perform operations on the home directory of the decoder. To check the number of SSH users who log in to the decoder, perform the following operations:
- Log in to the decoder where software needs to be installed as the admin user and run the su - root command to switch to the root user.
NOTE: The default password of the admin user is Change_Me. The default password of the root user is Change_Me.
- Run the who command to check the current number of SSH users.

- If the number of SSH users is 1 and the user does not perform operations on the home directory of the decoder, you can install the software on the decoder.
- If the number of SSH users is not 1, restart the server and ensure that the number of SSH users is 1.
Procedure
- Decompress the decoder.zip software package and obtain the install.sh file.
- Upload the preInstall.sh and decoder.zip files to the /tmp directory of the decoder through the SFTP tool.
- Log in to the decoder where software needs to be installed as the admin user and run the su - root command to switch to the root user.
- Run the cd /tmp command.
- Run the chmod +x preInstall.sh command.
- Run the ./preInstall.sh 192.168.2.101 192.168.2.1 command.
NOTE: - 192.168.2.101: Indicates the decoder IP address. You can change it based on the site requirements.
- 192.168.2.1: Indicates the decoder gateway IP address. You can change it based on the site requirements.
The system starts to install the decoder software. After the software is installed, the decoder automatically restarts. After the decoder is restarted, you can log in to the decoder web page (the default password after the service software is reinstalled is Change_Me) and check whether the decoder service is running properly.
Special Scenario
If the service software is faulty when the decoder is delivered, perform the following steps to reinstall the service software:
- Change the PC IP address to the same network segment of the decoder IP address and directly connect the PC to the decoder service port through a network cable.
- Reinstall the service software by referring to Procedure.
- Change the PC IP address to the same network segment of the decoder IP address (IP address configured when reinstalling the service software).
- Change the subnet mask based on the site plan (The default subnet mask when the decoder is delivered is 255.255.255.0. If the onsite subnet mask is also 255.255.255.0, skip this step.)
- Log in to the decoder web page as the admin user.
- Choose .
- Change the decoder subnet mask based on the site plan.
- Click Save.
I used Filezilla as SFTP tool
- Download Filezilla
Client
1. Enter at host :
sftp://<IP of the decoder>, and the use the ssh username and password, port
22 and quick connect
2. Drag and drop the
files from local PC where you decompressed the zip file to remote site
/tmp folder.
3. After that follow the reinstallation procedure:
The decoder has reboot and the problem is solved
Thanks to you and Huawei's technical support