Hi ! After a couple of weeks I can confirm that there are some problems in mikrotik with Intel® 82576 GbE Controllers. The problem is that some time after reboot (from 10 minutes to several hours in new version 6.7) connection with mikrotik is interrupted, I see that the link status lights periodically switched on and off on the card and displays an error message: linux kernel disabling irq #16.
This situation is repeated periodically on 3 different systems, so I was forced to use 6.4 version, because in 6.7 version such problem repeats every 10 minutes (and very rarely in older versions).
10 gbit 82599 X520-DA2 Intel card work fine in version 6.4 - that problems with 82576 make me crazy..
Traffic is about 3 gbit