This read-only counter tracks how many EAP Request/Identity frames the switch has sent to the client, the message that kicks off the 802.1X exchange by asking the supplicant to identify itself. An administrator checks it to confirm the switch side is actively prompting the client for authentication, especially when a session never seems to start. For example, seeing this counter increase repeatedly without a corresponding rise in received identity responses indicates the switch keeps asking but the client isn't answering.