In what situation can multicast-triggered authentication be enabled

If port-based 802.1x authentication is configured on a port, the function of triggering authentication by multicast packets is automatically enabled. This function is used for the clients that cannot send EAPOL-Start packets initiatively. If a guest VLAN is configured and the configuration takes effect, the port is added to the guest VLAN after the attempts to trigger authentication by multicast packets fail six times. Then multicast-triggered authentication is disabled temporarily.

In port-based 802.1x authentication mode, multicast-triggered authentication is enabled again when the user on the port goes offline.

If the port has been Down for more than 10 seconds, multicast-triggered authentication is enabled again when the port becomes Up.

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