non working ports2-5 after reboot on 951-2n

I have very strange issue with my 951-2n (buy it 3 months ago) after upgrade it to router OS v6 (currently 6.1).

  • Insert cable in port 3
  • reset device (turn off power, hold button, turn on power, hold button until led is blinking)
  • My PC get address from this mikrotik. I can connect to web-fig, mac-server on any port…
  • /tool mac-server enable 0
  • /system reboot After this router behaviour is very strange.
  • dhcp-server,mac-server,webfig doesn’t work on ports 2-5.

Setting static ip on my computer (192.168.88.5/24) let me ping mikrotik, but responses looks crazy:

64 bytes from 192.168.88.1: icmp_seq=714 ttl=64 time=1008 ms
64 bytes from 192.168.88.1: icmp_seq=715 ttl=64 time=1008 ms
64 bytes from 192.168.88.1: icmp_seq=716 ttl=64 time=1008 ms
64 bytes from 192.168.88.1: icmp_seq=717 ttl=64 time=1008 ms
64 bytes from 192.168.88.1: icmp_seq=718 ttl=64 time=509 ms
64 bytes from 192.168.88.1: icmp_seq=719 ttl=64 time=2.20 ms
64 bytes from 192.168.88.1: icmp_seq=720 ttl=64 time=2.20 ms
64 bytes from 192.168.88.1: icmp_seq=721 ttl=64 time=9.45 ms
64 bytes from 192.168.88.1: icmp_seq=722 ttl=64 time=249 ms
64 bytes from 192.168.88.1: icmp_seq=723 ttl=64 time=1007 ms
64 bytes from 192.168.88.1: icmp_seq=724 ttl=64 time=1008 ms
64 bytes from 192.168.88.1: icmp_seq=725 ttl=64 time=1008 ms
64 bytes from 192.168.88.1: icmp_seq=726 ttl=64 time=1008 ms
  • on port1 it’s normally functional…

P.S. 5.25 same issue. Installed with netinstall.

Sorry for my english. Thanks.