RouterBOOT is responsible for starting RouterOS in RouterBOARD devices.

Main and Backup loaders

By default, the main loader is used, but RouterBOARD devices also have a secondary (backup) bootloader, which can be used in case the main doesn't work. It is possible to call the backup loader with a configuration setting in RouterOS:

system/routerboard/settings/set force-backup-booter=yes

It is also possible to use the backup booter by turning on the device, with the RESET button pushed. It is only possible to upgrade the main RouterBOOT, so in case of failure, you can use the backup booter to start the device and downgrade the main loader. For upgrade instructions, follow the separate instructions in RouterBOARD#UpgradingRouterBOOT

RouterBOARD reset button

RouterBOOT reset button has three functions:

  • Hold this button during boot time until the LED light starts flashing, release the button to reset the RouterOS configuration (total 5 seconds)
  • Keep holding for 5 more seconds, LED turns solid, release now to turn on CAPs mode (total 10 seconds)
  • Or Keep holding the button for 5 more seconds until LED turns off, then release it to make the RouterBOARD look for Netinstall servers (total of 15 seconds)

If you hold the button before applying power, backup RouterBOOT will be used in addition to all the above actions. To do the above actions without loading the backup loader, push the button right after applying power to the device.

Reset the password 

Configuration Reset For Wireless Wire kits

The reset button has the same functionality as on other devices, explained in detail

5-second button hold on startup (USR LED light starts flashing) - resets to password-protected state.

10-second button hold on startup (USR LED turns solid after flashing) - completely removes configuration.


For RouterBOARD devices that feature a serial console connector, it is possible to access the RouterBOOT loader configuration menu. The required cable is described in the Serial Console manual. RouterBOARD serial port is configured to 115200bit/s, 8 data bits, 1 stop bit, and no parity. We suggest disabling the hardware flow control. 

This example shows the menu which is available in RouterBOOT 7.4beta4:

RouterBOOT booter 7.4beta4


built by build at Jun/15/2022 11:34:09 from revision 73B4521C

CPU frequency: 800 MHz
  Memory size: 512 MiB
 Storage size:  16 MiB

Press Ctrl+E to enter etherboot mode
Press any key within 2 seconds to enter setup

What do you want to configure?
   d - boot delay
   k - boot key
   s - serial console
   n - silent boot
   o - boot device
   z - extra kernel parameters
   r - reset booter configuration
   e - format storage
   w - repartition nand
   g - upgrade firmware
   i - board info
   p - boot protocol
   b - booter options
   j - boot os
   t - hardware tests
   l - erase license
   x - exit setup
your choice: 

The options are self-explanatory.

dboot delayDelays starting of RouterOS to allow an interface to initialize
kboot keyThe button that will open the configuration menu
sserial consoleSets the baud rate of the serial port
nsilent bootSuppresses all output on the serial port, in case some device is connected to it (like a GPS device or a temperature monitor)
oboot deviceAllows to enable Netinstall booting
zextra kernel parameters
rreset booter configurationResets the settings in this menu. Warning, no confirmation!
eformat storageDestroys all data on the NAND, including RouterOS configuration and license
wrepartition nandRefer to the Partitions document for more info
yactive partitionChoose an active partition from which to try to load RouterOS
gupgrade firmwareAllows upgrading RouterBOOT version through the network, or the XModem protocol
iboard info
pboot protocol
bbooter optionsSelect which bootloader to use by default
tdo memory testingbooter options
jboot osdo memory testing
thardware tests
lerase license

exit setup

Hitting the appropriate keyboard letter will give you a list of further options, they are shown below:

# d - boot delay:

Select boot delay:
   1 - 1s
 * 2 - 2s
   3 - 3s
   4 - 4s
   5 - 5s
   6 - 6s
   7 - 7s
   8 - 8s
   9 - 9s

# k - boot key:

Select key which will enter setup on boot:
 * 1 - any key
   2 - <Delete> key only

# s - serial console:

Select baud rate for serial console:
 * 1 - 115200
   2 - 57600
   3 - 38400
   4 - 19200
   5 - 9600
   6 - 4800
   7 - 2400
   8 - 1200
   9 - off

# n - silent boot:

Silent boot:
   0 - off
 * 1 - on

# o - boot device:

Select boot device:
   e - boot over Ethernet
 * n - boot from NAND, if fail then Ethernet
   1 - boot Ethernet once, then NAND
   o - boot from NAND only
   b - boot chosen device
   f - boot Flash Configure Mode
   3 - boot Flash Configure Mode once, then NAND

# f - cpu frequency:

Select CPU frequency:
   a -  200MHz
   b -  400MHz
   c -  600MHz
   d -  800MHz
   e - 1000MHz
 * f - 1200MHz

# r - reset booter configuration:

# e - format nand:

Do you realy want to format your storage device?
that would result in losing all your data
type "yes" to confirm: 

# w - repartition nand:

Select parititon count:
   1 - partition
 * 2 - partitions
   3 - partitions
   4 - partitions

# y - active partition:

Select active partiton:
 * 0 - partition
   1 - partition

# g - upgrade firmware:

Upgrade firmware options:
   e - upgrade firmware over ethernet
   s - upgrade firmware over serial port

# i - board info:

Board Info:

        Board type: CCR1009-8G-1S-1S+
     Serial number: 48FF01DDE6FD
  Firmware version: 3.19
     CPU frequency: 1200 MHz
       Memory size: 2048 MiB
         NAND size: 128 MiB
        Build time: 2014-09-23 15:02:34
  eth1 MAC address: 00:0C:42:00:BE:4A
  eth2 MAC address: 00:0C:42:00:BE:4B
  eth3 MAC address: 00:0C:42:00:BE:4C
  eth4 MAC address: 00:0C:42:00:BE:4D
  eth5 MAC address: 00:0C:42:00:BE:4E
  eth6 MAC address: 00:0C:42:00:BE:4F
  eth7 MAC address: 00:0C:42:00:BE:50
  eth8 MAC address: 00:0C:42:00:BE:51
  eth9 MAC address: 00:0C:42:00:BE:52
 eth10 MAC address: 00:0C:42:00:BE:53

# p - boot protocol:

Choose which boot protocol to use:
 * 1 - bootp protocol
   2 - dhcp protocol

# b - booter options:

Select which booter you want to load:
 * 1 - load regular booter
   2 - force backup-booter loading

#t - do memory testing:

launches built in memory test!

# x - exit setup:

Exit bios configuration menu and continues with system startup.

Simple Upgrade

RouterBOOT can be upgraded from RouterOS by:

  • Run command /system routerboard upgrade
  • Reboot your router to apply the upgrade (/system reboot)]
[admin@admin] > system/routerboard/upgrade 
Do you really want to upgrade firmware? [y/n] 

Every ROS version has a new RouterBoot version included in it, once you perform a ROS upgrade we always recommend upgrading RouterBoot also.

Checking RouterBOOT version

This command shows the current RouterBOOT version of your device and available upgrade which is either included in routerboard.npk package, or if you uploaded an FWF file corresponding to the device model:

[admin@admin] >  system/routerboard/print 
                ;;; Firmware upgraded successfully, please reboot for changes 
                    to take effect!
       routerboard: yes
        board-name: hAP ac
             model: RouterBOARD 962UiGS-5HacT2HnT
     serial-number: 6737057562DD
     firmware-type: qca9550L
  factory-firmware: 3.29
  current-firmware: 6.49.5
  upgrade-firmware: 7.4beta5 

In this case, you see, there is a newer version of the Bootloader firmware available already inside your current RouterOS version and it has been updated and requires a reboot.

A downgrade is also possible by uploading *.FWF file with an older version may be required for troubleshooting purposes when contacting MikroTik support.

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