From 5.1.6 → supported direct upgrade to:

When you first start the device, you will be prompted to change the default credentials. admin Default Password: Admin@123

: Includes IPsec, SSL, L2TP, MPLS, and GRE VPN for secure interconnection. High Availability (HA)

As Leo began the upgrade on USG6KV-03, an alert popped up on his dashboard:

: The story begins with a root login via SSH. An engineer creates a specific directory— /opt/unetlab/addons/qemu/huaweiusg6kv-5.1.6 —and uploads the image using tools like WinSCP or FileZilla.