ZyXEL Communications GS3700 Series, Handbook

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upper-case characters of the device’s MAC Address
separated by dashes (-) instead of colons (:).
b. Machines, like laptops or notebooks have more than
one MAC addresses (LAN, Wireless, etc). Make sure
that the correct MAC address is used in the
RADIUS-Server’s user profile.
2
If the Switch still does not allow access to authorized
devices after correcting the Switch or RADIUS-Server
configurations, wait for a few minutes before trying
again. This is determined by the MAC Authentication’s
timeout value, where the default time a devices is
re-validated is
300 seonds .