I'm having trouble following what you've done as far as the troubleshooting goes. My ultimate test for isolating switch vs cabling vs device is the below provided there have been no config changes. You can do other things in this process like running a cable test, disable any 802.1x or similar policies, etc. This is not 100% foolproof, but it usually works. 1) Does a basic laptop work connected to the same drop your device is in with similar or the same network settings, if so, it's the device, if not go to step 2 2) Does the device, if it can be moved, or a laptop or similar with appropriate network settings, work when plugged directly into the switch and port in question in your network closet work, if so, you have some sort of cabling issues, patches, the drop etc., if not go to step 3 3) You have a switch issue, could be config, could be hardware, a factory reset of the switch could help, or you can check with support at this point. If it's hardware you will have to contact support.
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