For ports in MAC-based Auth. mode, reauthentication doesn’t cause direct communication between the switch and the client, so this will not detect whether the client is still attached or not, and the only way to free any resources is to age the entry. Hold Time The Hold Time can be set to a number between 10 and 1000000 seconds. This setting applies to the following modes, i.e. modes using the Port Security functionality to secure MAC addresses:
Single 802.1X
Multi 802.1X
MAC-Based Auth If a client is denied access - either because the RADIUS server denies the client access or because the RADIUS server request times out (according to the timeout specified on the “Configuration->Security->AAA” page (see section 4.24 Security – AAA – Radius on page 135) - the client is put on hold in the Unauthorized state. The hold timer does not count during an on-going authentication. The switch will ignore new frames coming from the client during the hold time. Port Configuration The table has one row for each port on the switch in the stack and a number of columns: Port Set or show the logical port for the settings contained in the same row. Admin State If NAS is enabled globally, this selection controls the port’s authentication mode. The following modes are available:
4.20.2
Force Authorized: In this mode, the switch will send one EAPOL Success frame when the port link comes up, and any client on the port will be allowed network access without authentication. Force Unauthorized: In this mode, the switch will send one EAPOL Failure frame when the port link comes up, and any client on the port will be disallowed network access. 802.1X In the 802.1X-world, the user is called the supplicant, the switch is the authenticator, and the RADIUS server is the authentication server. The authenticator acts as the man-in-the-middle, forwarding requests and responses between the supplicant and the authentication server. The authenticator (the switch) doesn’t need to know which authentication method the supplicant and the authentication server are using, or how many information exchange frames are needed for a particular method. The switch simply encapsulates the EAP part of the frame into the relevant type (EAPOL or RADIUS) and forwards it.
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