This read-write value sets the maxReq constant used by the Backend Authentication state machine, the number of times it will retransmit an EAP request to the RADIUS server before timing out the exchange. Admins tune it to control how persistent the switch is against a flaky backend authentication server before giving up on a login attempt. For example, increasing this from the default of 2 to 4 gives the switch more retries before it fails a user's 802.1X authentication attempt.