How to Upgrade the cnMatrix switch to the latest Software Version

       Prerequisites for Upgrading the cnMatrix Switch.

  1. Current Image file (cnMatrix-EX2K-2.0.4-r1.img) for the latest Software version has been downloaded on the PC
  2. SFTP server tool has been Downloaded and Installed on the PC.
  3. Putty software has been Downloaded and Installed on the PC.
  4. PC is connected to the cnMatrix Switch with an Ethernet wire on its Management Port.

NOTE-2: - As the default IP on the Switch Management port is, please assign the IP of the same IP address range to the PC. For example, in this case, we are using

  1. Start the SFTP server by clicking on the dropdown button at the bottom of the SFTP window on “Start”:


  1. Once the server has started it will show the status as “Started” in the same window and Service status as “Running”:


  1. Now click on the Putty icon on the PC. A dialog box will appear as shown below: -


      4. Type in the default IP address of the cnMatrix switch ( in the box given below the Host Name (or IP address) and click on “Open”: -                                                          


  1. A console window will come up on the screen prompting for “login as”:
    1. Type in “admin” in front of “login as:” prompt.
    2. Another prompt in the next line will ask for the password
    3. Type in “admin” in front of “password:” prompt.


  1. Hit the enter key on the keyboard and we will be able to login successfully in the switch as follows:


  1. Check the Software version of the switch using the command “show system information

NOTE:  It will be on default version (2.0-r1) initially on the first use:


  1. Upgrade the switch by using the following command:
    1. download agent sftp://user:user@


  1. On a successful Download, we will get the message on the screen “Image download successful” and “Please reboot the switch
    1. Reboot the switch by using “boot” command and press enter and then letter “Y” on the keyboard:


  1. Also, check the SFTP server. It will also display the file information under the Message Column :


    11. After the successful reboot, please check the software version by using the command “show system information” on the switch. It would be updated to the newer version (2.0.4-r1). The cnMatrix switch has been upgraded successfully.



Followed all these steps but still not successful


What is the current software version on the switch? If the switch is running 2.0.x, you need to use .img file of the latest release firmware. If the switch is running 2.1 and after, you need to use the .tar.gz file. The .img file can be extracted from the tar.gz file using gzip tool. You can contact me via my email if you still face problem.

Thanks, I later used tftp to upgrade to 2.1 then 4.0 and it worked but now the problem is that these switches have taken so long to on board on cnmaestro cloud yet there is a stable Internet

I am not aware of any onboarding issue with 4.0. Can you access the switch console to ping
Also, please share the output for the following CLI commands:
show system info
show management
show ip int
show ip route
show ip dns name-server

Where can I download the image file that can be used to upgrade the switch?

The switch image can be downloaded from cambium support site.

1 Like

Thanks for the link.

I’m curious, can’t I flash the switch image using Pendrive?
(Similar to switch config)

can you check in the latest user guide. seems like it’s possible.

The documentation provide less detail regarding how to properly update image using usb.

I got multiple error message, like:

  • To many arugement
  • Lack manifest file
    and so on.

raise a support ticket.

I have raised the ticket regarding issues with the USB upgrade by creating a new post. Can you please reply?