Hmmm. Seems it would matter only if the NIC / ports are not properly locking onto the highest rated speeds / feeds. 100 is good for running at 1/2 duplex due to a long standing issue w/ them. My rule has been ports at 100 should be set to 100/full unless the ports or NICS do not tolerate it. I have seen NICs on certain things absolutely not tolerate being told 100/full b/c the NIC wants to set it so the ports side HAD to be auto/auto. Weird I know but a fact, good it's rare. For 1000 and above, auto/auto should work unless there's a card or line issue. My .02. Cheers.
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