RB5009 reboots itself each 8-10 days (7.2rc3/rc4)

RouterOS RouterOS beta
21

As it is related I’ve got same issue.
I have RB5009UPr+S+IN (the one is with PoE). Port 2.5Gb connected to Unifi 6E with own power, one port is connected to Unifi 6 Pro powered by device, + S+AO0005 (10Gb) installed into SFP to connect to PoE switch. For 4 month it worked perfectly with no issues, but suddenly started to do random reboots - sometimes in 2-3 days, sometimes 4-5 times per day. Load of CPU is up to 20%, mem 880 free from 1Gb.

First thoughts was it related to latest version 7.15 - I’ve tested on beta 7.16 and tested on 7.14 that was installed before reboots began.
Then I’ve replaced power adapter to another one - both use 48v up to 2A - it didn’t help.
Next focus was on temperature - board ~68 degree, CPU ~48 degree, so I’ve added active usb cooler and it was lowered to 53 and 37, but also didn’t help.
I also tried to lower CPU as it wasn’t on high load at all.
Then I’ve replaced it back to my old RB4011 and it also started to reboot (!).
Now I’ve removed S+AO0005 from SFP and now testing it for restarts. ← will update this message in few hours/days

UPD: One more possible issue could be - https://community.bluettipower.com/t/eb3a-flicker-every-30-minutes-making-ups-unreliable/23148/8 as due to russian aggression and a lot of destroyed electricity objects we have to use UPS, so to power Mikrotik I use EB3A, and there is a bug with it. I’ve changed configuration to use EB3A then APC UPS and then Mikrotik router, will check it…

22

i have the same problem but far worse. im on 7.15.3 and it reboots every few hours, nothing to do with load, temps or voltage. i have a bench psu powering it with extra safety features and out of random damn thing just reboots itself. its also new and been doing this. At first i thought PSU or tempts but even a peltier cooling it didnt help.

Mikrotik what have you done! you used to be ultra reliable. Worse still i had to reset config after networking issues which is why i upgraded my routerboard and it still didnt help. You would have months of uptime only to reboot for updates and updates would be stable.
You used to have upgradeable CCRs now your new CCRs are just not worth keeping when other arm options that can be upgraded exists.
changing firmware didnt help.

23

It’s not each and every RB5009 - my two units have been running 7.15.3 for about a month now with no reboots, and many older versions before that. Both survived in hot places this summer (under the roofs, at two different locations) so I don’t think it’s a cooling issue, it must be something else.

24

Hi,

No problems with a PoE version.




/system/resource/print        
                   uptime: 11w6d2h15m57s
                  version: 7.15.2 (stable)
               build-time: 2024-06-26 11:42:37
         factory-software: 7.4.1
              free-memory: 850.0MiB
             total-memory: 1024.0MiB
                      cpu: ARM64
                cpu-count: 4
            cpu-frequency: 1400MHz
                 cpu-load: 5%
           free-hdd-space: 481.8MiB
          total-hdd-space: 512.0MiB
  write-sect-since-reboot: 2769980
         write-sect-total: 2925587
               bad-blocks: 0%
        architecture-name: arm64
                 platform: MikroTik

Regards,