@Sunshine thanks for your reply. I set bridge mode like the photo. 9970 connects from LAN1 with keenetic viva router. It works with this connection. If there is a power failure or the 9970 restarts,...

Hello, I am using my device in bridge Mode. It works successfully. However, if I power off and power on the device,automatically, it does not bridging again. I need to set PPPoE and set Bridge again...