Just to chime in late here... I've a number of systems over the years with speed and duplex set to *auto and had terrible performance. The 400/iSeries/whatever reported in that it was running 100/FULL but wasn't getting anywhere near that. Until the recently I've always hard coded both the SW and NIC where possible. Here's a pretty simple test that will verify. Use Windows to get to the IFS folder where iSeries Access lives. ( /QIBM/ProdData/CA400/Express/Install/Image ). Now select all the files in that folder, right-click drag and drop to a folder on your pc and specify COPY... If it's a true 100MB connection, the copy will take 3 minutes or less ( on V5Rx ). If it bad, Windows will typically give you an estimated time to complete of 100+ minutes at which I bail on the copy. Another test I stumbled into was poor FTP performance. I was trying to FTP some Image Catalogs between a 800 and an E4A it was taking forever, like an hour per CD image. Found a cheap SOHO class switch in the loop between the systems and got the 800 off it and my FTP times fell to around 75 seconds per image.Other issues could be a mismatched duplex setting - ensure that both
the switch and the ethernet line description are configured the same
(in most environments, *AUTO/*AUTO is the way to go).
I have *AUTO/*AUTO and it is currently at 100M and *FULL which matches the hardware capability.