D-Link DSL-2877AL - WAN Failover Priority Setup

D-Link DSL-2877AL Dual Band Wireless AC750 VDSL/ADSL2+ Modem Router User Manual
Section 3 - Web User Interface Configuration
Page 51
WAN Failover Priority Setup
To access the WAN Failover Priority Setup page, click on the Setup menu link at the top, and then click on the WAN Failover Priority Setup menu link on the left.
On this page we can configure the WAN interface failover priority of this product.
WAN Failover Priority Settings
In this section to configure the WAN interface failover priority.
Select a WAN interface, and then click Up or Down button to change the WAN
interface failover priority.