Unifi Cloud Gateway WAN2 Failover Setup

Here is a complete, step-by-step guide for setting up a dual-WAN failover on a UniFi Cloud Gateway (UCG) Max or Ultra network controller!

UniFi Console Migration Guide:

Dream Machine Upgrade or Migration: Including Cloud Account Claiming, Cellular WAN Failover, SSH Credential Capture & Orphaned Device Recovery

This guide covers migrating all adopted UniFi devices (APs, switches, cameras) from a Dream Machine (UDM) to a Dream Machine Pro (UDM-Pro) with minimal disruption. It assumes you are replacing the UDM entirely and the UDM-Pro will take the same network role.

This guide has been updated with real-world field experience from an actual UDM → UDM-Pro migration, including the cloud account claiming procedure, Mesh AP tweaks required post-restore, and cellular WAN failover configuration using a designated LAN port as WAN3.