A few months ago I purchased an RB600A to replace my old RB433+RB112, and got it up and running with 2 Dbii f50-pro's, an f20-pro, and an R52. First thing to note is that the Dbii cards don't actually fit properly in the RB600A - but I solved this by tying them down in place...
Everything seemed OK, the cards all worked... except that the routerboard would sometimes reset on its own especially if I had a high-rate transfer initiate on one of the cards, or the TXpowers were set too high. I assumed this was a power problem, and indeed moving from a 15V 1A PSU to a 18V 3A PSU along with an upgrade to ROS 4.x, seemed to fix the problem.
Today I planned to expand my site further, with an RB502 and another f50-pro, for another link. I installed the new card, and low and behold, that rebooting problem was back. Once I logged into winbox, the new radio would not respond to scans (no results), and after a few reboots when it finally did respond to scans, if I connected to SSID and started a transfer the router would just reboot again, same thing.
Another thing to note is that a few of my other links RX CCQ are also bad and speeds are erratic, which is not the case if I transfer those cards to my RB433... so I assume something is wrong with the board/power.
So a friend on the Wireless User Group which we're a part of, gave me the following advice:
[20:58] <NightShade> fragtion i had a similar issue with my RB
[21:01] <NightShade> try downgrade to routeros 3.10 and see if you still have the problem
I tried this - downgrading to 3.10 (from 4.11), and when I logged back into my RB600A I was welcomed with the ROS license page saying I'm level 0 license and must upgrade the license. But why would a downgrade cause the license to be deleted? I've downgraded routerboards before without having this problem. I can't upgrade back to 4.11 because now the (lack of a) license doesn't support this, and I have 23 hours left to fix it before the router apparently bricks out completely
I find it unfair to buy a new 4.x license if I had one on the RB600 already. The only reason I downgraded in the first place was because the hardware was giving me endless problems, which really it should never have given anyway? - and I was out of solutions to fix it
So my questions are:
1) What can I possibly do to recover my license and just at least get back on ROS4.11 again?
2) Is there any known cause in the first place, to explain why an RB600A should reboot itself (log says something about watchdog timer), even if its being fed 18V 3A through the DC socket? How much more power do these things need to be stable? More importantly, why design a board that has daughterboard expansion card capability if it cant even be stable WITHOUT that addon? I'm rather confused right now, and hope that please someone can help me out over here
Should I E-mail MikroTik directly instead? Please advise
Thank you in advance