IEEE 802.1X overview

Last Updated : Apr 17, 2026 |
Prolog information
Metadata
Keywords:
The IEEE 802.1X standard provides specifications for secure layer 2 network access. Phones implement 802.1X supplicant in unicast and multicast modes and pass-through mode and proxy logoff for the attached device on the PC port.
When 802.1X is enabled, the phone ignores any incoming LLDP packets until the 802.1X authentication is completed or there is a time-out. The LLDP packets are processed after one of the following:
  • 802.1X authentication completes successfully.
  • 802.1X authentication fails.
  • The phone does not receive a response from the switch on any 802.1X request for 90 seconds.
Note:
If the phone is in force-auth mode, there is an additional delay of 90 seconds during the phone boot-up.
Related information
Configuring the phone using Administration menu
Configuration parameter to automatically enable 802.1X supplicantAutomatically enabling 802.1X supplicant using the web interfaceSetting the 802.1x operational mode802.1X operational mode settings