IEEE 802.1X

As of Release 2.6, certain IP telephones support the IEEE 802.1X standard for pass-through and Supplicant operation. The system parameter DOT1X determines how applicable telephones handle 802.1X multicast packets and proxy logoff, as follows:

• When DOT1X = 0, the telephone forwards 802.1X multicast packets from the Authenticator to the PC attached to the telephone and forwards multicast packets from the attached PC to the Authenticator (multicast pass-through). Proxy Logoff is not supported.
• When DOT1X = 1, the telephone supports the same multicast pass-through as when DOT1X=0. Proxy Logoff is supported.
• When DOT1X = 2, the telephone forwards multicast packets from the Authenticator only to the telephone, ignoring multicast packets from the attached PC (no multicast pass-through). Proxy Logoff is not supported.
• Regardless of the DOT1X setting, the telephone always properly directs unicast packets from the Authenticator to the telephone or its attached PC, as dictated by the MAC address in the packet.