So this week my routerboard has been working fine but out of nowhere it drops from the network, i can connect to it from the radio side and I'll just reboot it and it comes back up. Then I get swamped with other things and forget all about it, well it happened just a few mins ago, logged in, looked at the log and saw this on the first two lines...

dec/31/2001 19:00:02 system,error,critical System rebooted because of kernel failure
dec/31/2001 19:00:03 system,error,critical router rebooted without proper shutdown, probably power outage

Its not the only routerboard that I have up, as a matter of fact the other routerboard is connected to the same power source so its not like I lost power at the site. I'm running XR5's with Nano's for customers.

Make a supout and email support.

Could you describe the "same power source" in more detail? And how do you get the power to the RB?

I have a setup with two RBs on the same power supply. Both have 16 ga outdoor direct burial wire. One has a 12 foot run, the other has a 200 foot run. When the 12 foot run unit shows 12.8 volts, the 200 foot run RB show 11.9 volts. If you were to take a scientific guess, which would always fail first during a brownout?

I think Tim is on the right track. Sounds like a lack of power.

my rb's are being powered via 24volt PoE, each RB has its own PoE, cables Ethernet isn't longer than 25ft. What i meant by same source is they are plugged into same surge protector.

So I upgraded to 4.2 over the weekend on Saturday night actually, really thought that solved it but today just before lunch I noticed it did it once again. I think this weekend I might just have the PoE injector swapped out, see if that's it, I did just email support thought with the supout file.

Both sound like a good idea. What hardware are you using? Does it happen to have voltage monitor?
/system health print
Is there a voltage listed?

I am using an RB433AH with two XR5's, I did do a /system health and it was at 22.1 V, of course this was after it had happened, and if I look now its at 22.3. I have about 51 NS5's connected to these XR5's, 31 on one radio and 20 on the other.


just as I was finishing this post I looked again and the voltage was at 21.9 V. I have another RB433AH + 1 XR5 at the same tower and that has 39 NS5's connected to it. It's voltage has fluctuated between 23.0 V to 23.4 V. I have not seen the error occur on this other RB433AH though or any of the other RB433AH's I have out in the field which is 8.

If you want to keep track of the voltage in "/log", here is a script that puts the voltage in the log. Use "/system schedule" to schedule it to run every hour, or as often as you think necessary.
The script function is in
/system script

ADD: If you want an email every day, and an email alert every hour on low voltage:
http://wiki.mikrotik.com/wiki/Monitor_i ... B333/433AH