Mikrotik RBM33G - FAIL -Installing Kernal

Hi All,

I cannot get the RBM33G Kernal image to install via PXE Server.
Has anyone managed to successfully install the kernel onto this product?
Does anyone have any info on why the kernel will not install onto the RBM33G?

I have been using the Mikrotik RBM11G in a product for about 3 years with OpenWRT. I found at some point that only earlier versions of the Kernel would allow Kernel install via TinyPXE Server. So, I would use version 22.xxx for Kernel install then install the latest version of the Sysupgrade. This is now EOL so I am hoping to use the RBM33G.

I have managed to install kernel version 22 of the RBM11G onto the RBM33G, just to check if it would allow OpenWRT to install at all, it worked. Of course, this will not allow me to install the RBM33G Sysupgrade, it recognises that it is not an RBM11G model, as per the code in the Kernel

You may wish to ask @deavmi:

what was your method?
I have now managed to get the serial connection working but the Kernel loads in Putty but not in the browser for sysupgrade install

Hi, netboot 21.x series. Then when running ramdisk, apply sysupgrade to 21.x.

I then climbed my way up by susupgrading to 22, 23 and 24.

The latest images will not netboot - to big - rejected by bootloader.

I could tell as I am hooked up via serial.

So I netbooted 21.x kernel image, then installed sysupgrade via webui. Then via web ui applied 22x, 23x and finally 24x.

OK - so the kernel is installing, I can see through the Serial port the kernel is loading, it just can't connect to anything via the LAN.
The ethernet has an ip address but cannot ping anything on the local network.

Well yeah, if the IP doesn't match the existing subnet, or is already used by a different device on the LAN.

This is networking 101.

There should be DHCP server running on the switchchip ports (plug ethernet into ether ether2 or ether3).

That is the default config. Ether1 (seperate interface not on switchchip) is running as DHCP/DHCP6/ND client and hence it won't give you any IP - but rather is expecting it.

I recommend looking at /etc/config/network via your serial connection to see all the config.


Also ensure that you exit he OpenWRT TFTP script when connecting to ether2/ether3 via your network interface on your PC as it may try to assign static network config, you want your PC to connect with DHCP client to those ports and let the RBM33G assign network config to you.

I hope that helps.

Hi, the IP address matches the existing subnet and is not the same as an existing device

thankyou @deavmi I will check this, thanks for getting back again!

1 Like

No problem, please let me know if it works!

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