Is this still an issue for you? I have recently worked on a UAC deployment with 3Com switches. We did have to use a 3Com dictionary file. Are you trying to assign a vlan? Are you using EAP-TTLS or EAP-PEAP? What are the switch models that you are trying to use? Believe it or not, they are not all the same. Can you post the switch config and radius attributes that you are returning from the IC?
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