RB433AH crashes with "kernel failure" with 2x R52nM Radios

RouterOS General
1

Hello,

I sincerely hope someone can provide us with an answer… We are busy doing a big upgrade, and we are using multiple RB433AH routerboards with no more than 2x R52nM radios. These boards came out with OS v. 4.10

As soon as the board boots up, and you configure 1 radio, the board reboots… The log file then tells you after that “router rebooted due to kernal failure”.

If I attach the serial cable and view from a terminal screen, I get a whole lot of gibberish of what is going wrong:

Oops[#1]:
Cpu 0
$ 0 : 00000000 1000f600 00000000 deadc0de
$ 4 : d006a258 ffffffff 00000002 d0060000
$ 8 : c033da72 c033da3a 00001685 c6cd0cec
$12 : 00000013 0000003f c033da24 00000002
$16 : 00000003 c033da16 c033da3a c6cd0000
$20 : c6cd0e3c c033da1b c033da11 c033da43
$24 : c033daf0 000186a0
$28 : c033c000 c033d9d0 c6cd06e8 c6d92820
Hi : 00000000
Lo : 00000016
epc : c024f8bc rb500_readl+0x17c/0x188
Tainted: P
ra : c6d92820 a5416_hw_getnf+0x7ff4/0x1000c [a5416]
Status: 1000f603 KERNEL EXL IE
Cause : 1080001c
PrId : 00019374 (MIPS 24K)
Process swapper (pid: 0, threadinfo=c033c000, task=c033e168, tls=00000000)
Stack : c033da42 0000b300 00000080 c6d2c000 00000003 c033da16 c6d92820 c6d93b9c
00000000 00000000 00000000 00000000 c033da30 00000008 00000000 00000000
5c242220 1a000000 00000000 00000000 00000006 80000008 00010000 00000000
68202020 2020201e 16000000 00000000 00000024 00240024 00240024 00220020
001a0000 00000000 00000000 00000000 00240020 00200020 00200020 0020001e
…
Call Trace:
[] rb500_readl+0x17c/0x188
[] a5416_hw_getnf+0x7ff4/0x1000c [a5416]


Code: 8fbf0018 8fb10014 8fb00010 <00601021> 03e00008 27bd0020 27bdffe0 afb10014 afbf0018
—[ end trace c4632a21b3f06083 ]—
Kernel panic - not syncing: Fatal exception in interrupt

panicSaver: dumping panic to flash
flash: erase f
flash: prg f
spi_program_sector 0000000f
Rebooting in 1 seconds..

Please can someone help us with this? We even loaded the latest OS on and it till does it. It works fine with only ONE radio…

2

Please upgrade to RouterOS v5.0beta6 or wait for v4.12.

3

Thanks for the reply…

Is this wise? I mean, this is a very important set of links that we are setting up, surely we need a stable OS to run with, what garuantee do we have that this would be the solution?

Allthough I have dicovered something TOTALLY wierd… I got the board working now, by simply changing one of the radios. Its like the board doesn’t like a certain combination, allthough ALL the radios are new, and Identicle. This is not the only board that does this. I have tested 2 other boards too, and same result. The “faulty” radio then works fine with another radio in another board… WIERD!

Guess I need to swop and change radios until the boards are happy… Not cool. So, does it sound like a OS issue?? But why would all the previous OS’s have this too? Please, I need clarity on this, this is causing alot of problems for us techies that install.

Update:

Loaded OS5 Beta 6 onto the board, put both original radios back, and its running smoothly now…

I will test it futher and post my findings here, but atleast it doenst seem to reboot anymore…

Thanks…