U6lr Latest Firmware
Establish an to the AP's IP address (default credentials are often ubnt/ubnt or your custom device password). Run the command: upgrade [FIRMWARE_URL] . The device will reboot and apply the update. Rollback Strategy
Using an older U6-LR firmware (say, version 5.x or early 6.x) exposes you to several risks: u6lr latest firmware
Output will show Version: 6.7.8 .