Menab, a quick google searc seems to indicate that the 3com switches you mention will do 802.1x authentication. As far as I know, we don't have a config for the 3com switches, but again, Google is a good plase to start. Also, we did QA the 3Com 4400 Super Stacks wiht UAC 4.1...so it sounds like you shoudn't have too much difficulty getting it setup to work with UAC. Thanks Craig
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