LAN/NIC problem

[MarkHaysHarris777]

So please explain why my board run perfectly at longsleeps environment. It was the same piece of hardware and exactly the same as i used, because it even was my board!

That's easy...  because its a hardware problem; allow me to explain.

... hardware problems are almost always NOT precisely reprocudable , and almost ARE always  interpmittent, not only within their own environment but also across environments-- and particularly if the issue is border-line.

To be more precise, your board was not 'fixed' nor 'corrected' in longsleep's environment; he just knows how to tune the boards so that regardless of their condition they function better;  but, its still the same board, and it still is not functioning correctly.  I will absolutely guarantee that my bad board will NOT run in longsleep's environment , period (because my board is NOT border-line... at Gbe, it doesn't work at all !-- its not about tuning... its about non function.  It has a serious hardware flaw.

Just to be complete here, software problems (on the other hand) are almost always reproducable , on every machine , in all environments.  If you do x, y, and z the software will fail like such and so !  Also, if you make a software correction (on all boards) then the problem ceases to exist on all boards.  If the problem is environmental, then the problem follows the environment (for all boards). 

We have the unique situation with my boards in that one of them works perfectly (GbE) and one of them does not work at all (GbE); the problem does not follow the software, and the problem does not follow the environment !  In fact, the environment that I created for testing is perfect-- honestly , there is no better environment on earth to test these boards than in my lab.  One of my boards works flawlessly, and the other one does not work at all.  The conclusion is 'conclusive' !  This problem is a hardware flaw (probably manufacturing flaw, as apposed to design flaw) on the boards themselves.