Mikrotik 4011 ethernet 6-10 link down

Hello,

i have problem with my mikrotik 4011rb. everyday my slots eth 6-10 just suddenly drops down ( link down ). I even bought new mikrotik and problem is the same. Can you help me find issue? After reboot it works fine, but after about one day it happens again. I attach log file.
link droo.PNG

Which version RouterO? I have same problem with 7.11.2 and port 1-5

Have been running my RB4011 with nearly all versions…never had this problem.
Can you share your config (just to be sure)?

/export file=anynameyoulike

Remove serial and any other private information, and place it in between code tags: </>

Have you tried using a different power supply?
Could it be related to the DHCP offers?