I have a Lanner Electronics FW-7568 with 6 Intel 82574L built in NIC’s Since upgrading to 6.0 and all through to 6.6
I have noticed that when the router reboots or power cycles. One of my ports will not link I have to winbox in and disable and re enable
the port and that usually fixes it until the next upgrade or power outage. I have tried other ports on the router with same result although I
will point out that I have to force the port to full duplex 100Mb and disable auto negotiation in order to work with Comcast metro e service.
(that is there requirement) I have 2 other ports with cables to switches and they always come up fine with auto negotiation enabled.
I also tested another port forcing it to 100Mb Full duplex no auto negotiation to my switch and have the same problem after reboot or hard power cycle will not link
I never had these issues before 6.x Mikrotik can I provide you with anything to tell if its a bug?