Jason, looking at your configuration I found what I didn't check on B3 switch configuration. it's the "multiauth" modality. On B3 series (But also A2, A4, N7 series) switch the "multiauth" mode is set by default as "strict", it means that only 802.1x is enabled and that's why no authentication message has forwarded from the switch. On the other hand, B5/C5 switch has set by default "multiauth" mode as "multi" (Both 802.1x and macauthentication enable), for that reason it works. Thank you a lot for your support best regards Claudio