Hello friend!
I don't understand your question. Do you need to configure the IP address of the B310s-938? Or the default IP address of the B310s-938?
As per the picture you provided, the IP address of the B310s-938 is 192.168.254.254.
For details about how to log in to the management interface of the device, refer to the ONT login method. For details, please see: How to login Huawei ONT.
To configure the IP address of the B310s-938, you need to log in to the WebUI of the B310s-938 and configure the IP address. Ensure that you configure the IP address of the B310s-938 as a valid IP address. For details, contact your local ISP.
Thanks!