802.1x Port Method MAC Based useless?
I'm running 802.1x with MAB and Port Method 'MAC Based' questioning RADIUS.
I noticed some traffic going through even if the MAC is refused and Port Status remains 'Unauthorized'. It's a phone device and the traffic seems enough to obtain an address via DHCP and to register a SIP session.
Even more: Enough is going through to establish a call! The stream is getting interrupted every few seconds but stays open to come back.
Still more: If a connect a second (accepted) MAC behind the phone both devices are able to communicate without interruption. The switch keeps questioning RADIUS about the refused MAC but traffic is going through as if the MAC was accepted.
Still stays 'Authorized' if I disconnect the valid MAC behind.
Any ideas?