When a power failure occurs, the device restarts due to a breakdown, or a network interface becomes abnormal. The device will stop processing data and switch to an optical bypass module. The optical bypass module configuration page is displayed only in bridge mode, as shown in the following figure.

Select Enable External Optical Bypass module to enable the optical bypass module. Next, an optical bypass switch needs to be connected.

Connect an optical bypass switch before enabling the optical bypass module for the first time.

A message will prompt you to restart the device at this time.

In Type, select optical bypass. Currently, only domestic bypass switches are supported. See the following figure.

Click Add Optical Bypass Module to add an optical bypass mode. In the Add Optical Bypass Module dialog box, Optical Module ID and Bridge. Enter the module ID on the bypass switch in Optical Module ID. See the following figure.