Adjust the speed of an RTN380H port (error code: 42189)

In the customer network, there is and switch connected with a RTN380H, for which his port support only the 1G speed.

He is trying to adjust the speed of an 10G port of RTN to 1G, but the next error occurs: The working mode of the port is incorrect. error code:42189.

The configuration is made in WebLCT for RTN380H software version V100R007 and V100R008. Both version give the same error.

In the pictures below, can be seen the ports settings before and after of applying the speed adjustment, and also the error:

Checking the configuration, and found there is configured point to point E-Lan service.

Because, for the first time, the port was configured as 10G, when try to change the speed the error occurs.

To be able to take effect the speed adjustment, if the port was already configured with a value, need to clear the port and add it again with the wanted value like in the picture below:

This procedure can be done for any port.