I have also disabled DAI across my thirty sites with MS-225's and MS-210's. I don't know if it's my DHCP servers or my clients or the switches, but machines that are on untrusted ports that have obtained their IP address via DHCP and are working will just suddenly stop working and show in the logs as being blocked. Of course when they're scattered across the country and it's happening at random times to random individuals... it's hard to troubleshoot. I was forced to simply disable the feature on all of my switches.
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