RUT9xx Bootloader Upgrade

From Wiki Knowledge Base | Teltonika Networks
This is the approved revision of this page; it is not the most recent. View the most recent revision.


A Bootloader is a program that loads the operating system or some other system software for the router after completion of the power-on self-tests; it is the loader for the operating system itself.

This article is a guide on how to upgrade RUT9xx router's bootloader.

Checking your Bootloader version

You can find your Bootloader version in the Firmware section under the System tab; in short: System->Firmware. You'll find the Bootloader version under Current Firmware Information, just below Kernel version:

Configuration examples bootloader how to find.PNG


Set up a static IP address for your PC

Bootloader can be upgraded from the Bootloader menu. When the Bootloader menu becomes accessible, the router will not be working in its regular state, i.e., all regular services will be disabled, including DHCP, that is why you will first need to setup a Static IP address on your PC to be able to reach the router.

The router's default address is, therefore your PC's IP address should be in the first sub-net as well, for example: The last number can be any number in the range of 2 - 254, i.e., - Your PC's IP can't be the same as the router's (, it can't be and as well.

A short guide on how to set up a static IP address will be presented bellow.

Windows 10

To set up a static IP address on your PC using Windows 10, you must first go to the Ethernet Settings menu. In order to reach the Ethernet Settings window, enter "Change Ethernet Settings" in the Windows search field located next to Start in the bottom left corner of the screen and press Enter:

Configuration examples bootloader windows ethernet.PNG

When in the Ethernet Settings window, click Change adapter options located under "Related settings":

Configuration examples bootloader windows change adapter options.PNG

When in the Network connections window, right-click on the Network connection associated with your Ethernet adapter and click Properties:

Configuration examples bootloader windows network connections new.PNG

Next, click on Internet Protocol Version 4 (TCP/IPv4):

Configuration examples bootloader windows network connections ipv4.PNG

Check Use the following IP address and enter a static IP for your PC (e.g.,; netmask -; gateway -

Configuration examples bootloader windows network connections static ip.PNG

To undo these changes, go back to the Internet Protocol Version 4 (TCP/IPv4) window and check Obtain an IP address automatically.


To set up a Static IP on a Linux OS, open the Terminal app and enter the ifconfig command. The ifconfig command provides information on network interfaces. Find the Ethernet interface and memorize its name, which should be located on the left side of the table:

Configuration examples bootloader linux ifconfig.png

Next, enter this command into the terminal:

sudo ifconfig if_name ip_addr up

Replace if_name with the name of your Ethernet interface and ip_addr with the IP address that you want. Following from the example above the full command would look like this:

sudo ifconfig eth0 up

Configuration examples bootloader linux static ip.png

After this you PC's IP address should have been changed. To check, enter the ifconfig command again and check to see if the Ethernet interface has the IP that you assigned:

Configuration examples bootloader linux ifconfig check.png

To undo the changes use these two commands one after the other:

sudo dhclient eth0 -r
sudo dhclient eth0

Replace eth0 with the name of your Ethernet interface.

Bootloader menu

Next, unplug the router's Power Supply Unit (PSU) and leave only one LAN Ethernet port plugged in (for your computer). The other LAN ports and the WAN Ethernet port have to remain unplugged for the duration of the following procedure.

Press and hold the Reset button. Plug the Power Supply back in while holding the Reset button. After plugging in the Power Supply, hold the Reset button for 3-4 sec. After this, all Ethernet port LEDs should start blinking.

Now you can enter the Bootloader menu. Open your web browser and enter your router's IP address into the URl field and add /uboot.html at the end ( This may not work if have connected to the router's WebUI at least once before, since the URL's path may be cached. To solve this problem you can clear the browser's cache or, more simply, open the browser in a mode that doesn't cache browsing information. On Google Chrome it's called Incognito and can be reached by pressing ctrl+shift+n; on Mozilla Firefox it's called Private Browsing and can be reached by pressing ctrl+shift+p; on Microsoft Edge and Internet Explorer it's InPrivate, can be reached by pressing ctrl+shift+p.

Upload the Bootloader image and click Update U-Boot:

Configuration examples bootloader uboot menu.PNG

After this you should be greeted with a window such as this:

Configuration examples bootloader uboot menu update in progress.PNG

This means that the upgrade has started and you can close the browser window. The update itself takes only a few seconds but the router will restart afterwards. The entire process before the router becomes reachable again will take 2-3 minutes

IMPORTANT NOTE: don't forget to change back your PC's IP address because it might cause problems when connecting to other devices or no internet access if you haven't specified any DNS servers manually.

Firmware menu

You can also update the router's Firmware this way if needed. Instead of /uboot.html, the path for Firmware is /index.html. You will find a guide on how to upgrade your Firmware to a newer version via the Bootloader menu here.