The dot1x mc-trigger port-up-send enable command enables the function of triggering 802.1X authentication through multicast packets immediately after an interface goes Up.
The undo dot1x mc-trigger port-up-send enable command disables the function of triggering 802.1X authentication through multicast packets immediately after an interface goes Up.
By default, the function of triggering 802.1X authentication through multicast packets immediately after an interface goes Up is disabled.
Usage Scenario
By default, the device periodically multicasts EAP-Request/Identity packets to clients so that the clients are triggered to send EAPOL-Start packets for 802.1X authentication. If the device interface connecting to a client changes from Down to Up, the client needs to send EAPOL-Start packets again for 802.1X authentication, which takes a long time. You can run the dot1x mc-trigger port-up-send enable command on the device to enable the device interface to multicast EAP-Request/Identity packets to the client to trigger 802.1X authentication immediately after the interface goes Up. This configuration shortens the re-authentication time.
Precautions
When the access control mode on the device interface is based on the MAC address, the dot1x mc-trigger port-up-send enable command does not take effect.