Intel 82571EB problem

RouterOS General
1

Hello a have strange problem

in router installed two NICs

  1. Intel Server Adapter PRO/1000 PT (82572EI)
  2. Intel Dual Port Server Adapter PRO/1000 PT (82571EB)

(82572EI) – works perffect
(82571EB) – in low loads (pinging another host) works fine when i try to load NIC pings sudenly stops with timeouts and time to time on rear panel NIC LEDs Stops lights and after second lights up again . after load removed, remote host strarts to ping again

My CPU i5 4Cores MB Intel with P55 chipset
RouterOS 5beta6 and RouterOS 4.11

please help me

2

Hi,
did you tried this?

/system hardware set multi-cpu=no
3

solved it’s my mainboard issue
replaced to new one and everything ok now