i run a bunch of Mikrotik Switches and APs - all running fine as till today, when one L009 suddenly stoped working. i figured that the device is only working on port 1 - which is the uplink to a switch in the basement. All other ports are dead. I tried to reset it but this did not change anything - upgrade to the latest ROS version is done. Layout of the piece tells me, that port one is the only one not going through the switch chip.
Does this may be mean that the switch chip is broken?
Any help or ideas how i can debug this is very much appreciated.
Well, in general I could say that when something changes “by itself” it is not a good idea to reset the config when trying to solve it. Are you sure your current config is what it should be? E.g. you had a backup and have restored it.
Hi …
thx for getting back
it looks like the switch is totally dead now - cannot reach it any more, after i performed another factory reset.
Only power and status LED work - all ethernet ports are not indicating any connection, even when i power it through PoE on port 1 - the LEDs stay dark.
the config it self seems to be ok - i restored the last backup (one week ago) to an identical device, and it works as this one did before.
Only thing that came to my mind is to use the console port to check if i could reach it … any experience how to use that one?
You can use an “industry standard RJ45 to RS232 cable” to connect to the serial port. That kind of cable is often in junkboxes in IT departments because for some time one was packed with every router or switch from major manufacturers. Of course you then need a serial port on the computer, when you do not have that you also need a USB to RS232 cable.
Nowadays, cables that go directly from USB to RS232 with RJ45 connector are available as well.
But as @loloski already wrote, you can also immediately try the netinstall procedure that would be required anyway when the serial port has some error message like invalid kernel file or something.
What is the behaviour at this step of your router ?
From what we see Netinstall did work, if it stuck here, then this is the file transfer part that fails, but first netinstall (PXE) polling from the routeur to search a Netinstall server did work (last line shown), the minimalist system has been sent to the router…
If it stays here, maybe your storage is in a bad state
At least, RouterBOOT seems to be OK, which is a good new
Also, did you try to launch netinstall with both bootloaders ? Try to netinstall by pressing the reset button just after powering on to trigger main bootloader, and if it doesn’t work, press the reset button before powering on,
i tried both - with no success …
the router just stays there forever - only the BLUE LED is on after i release the the reset button (of course the green one was one, flashed a couple of times and went stable again, then turned off)
not even the LEDs above each ethernet port flashes or light up during boot
However, when it has a hardware defect affecting the switch part, it could well be that shows no error but a normal bootup sequence, and the thing is still toast.
Like @pe1chl , if you can access the router in RS232, you could still configure RouterBOOT
You can try a complete reformat of the flash (or NAND on L009 ?) from RouterBOOT, that still seems to work as the router searched for Netinstall server (last picture)
As far as I remember, reformat should not erase your license key (it is shown as is in the docs)
