Hi Matthew,

LSO was a good hint, thank you.

Today we did some tests with our "bad" adapters all with current drivers.

Intel:
    82566DM-2 and PRO/1000 MT are only ok when you switch off LSO

Broadcom:
    57xx does not provide such a switch, we switched off every other available option one at a time without success


Do you have the ability to test such an adapter? You can see immediately if it is ok or not when you simply copy a 20MB file with Winscp or any other client which shows you transfer rates. The rates are very low and change all the time and might even drop completely.

While you don't transfer files you might not even notice that there is a problem. We used our "bad" adpaters all day long with Putty and thought that everything was ok.

So now we know that we can add Intel cards to our Broadcom desktops and switch off LSO to bypass our problem but this is not the best solution.....

Regards,

Bernd




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