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Only then, will frames from the client be forwarded on the switch. There are no
EAPOL frames involved in this authentication. Therefore, the MAC-based
authentication has nothing to do with the 802.1X standard.
The advantage of the MAC-based authentication over the port-based 802.1X is that
several clients can be connected to the same port (e.g. through a 3rd party switch or
a hub) and still require individual authentication. The clients don't need special
supplicant software to authenticate. The disadvantage is that MAC addresses can be
spoofed by malicious users - equipment whose MAC address is a valid RADIUS user
can be used by anyone. Also, only the MD5-Challenge method is supported. The
maximum number of clients that can be attached to a port can be limited using the
Port Security Limit Control functionality.
RADIUS-Assigned QoS Enabled:
When the RADIUS-Assigned QoS is both globally
enabled and enabled (checked) on a given port, the switch reacts to QoS Class
information carried in the RADIUS Access-Accept packet transmitted by the RADIUS
server when a supplicant is successfully authenticated. If it’s present and valid,
traffic received on the supplicant's port will be classified to the given QoS Class. If
(re-)authentication fails or the RADIUS Access-Accept packet no longer carries a QoS
class or it's invalid, or the supplicant is otherwise no longer present on the port, the
port's QoS class is immediately reverted to the original QoS class. This may be
changed by the administrator without affecting the RADIUS-assigned.
This option is
only available for single-client modes.
Port-based 802.1X
Single 802.1X
RADIUS attributes used in identifying a QoS class:
Refer to the written documentation for a description of the RADIUS attributes
needed in order to successfully identify a QoS class. The User-Priority-Table attribute
defined in RFC4675 forms the basis for identifying the QoS class in an Access-Accept
packet.
Only the first occurrence of the attribute in the packet will be considered and to be
valid, it must follow this rule:
All 8 octets in the attribute's value must be identical and consist of ASCII
characters in the range 0-3, which translates into the desired QoS Class in
the range of 0-3.
RADIUS-Assigned VLAN Enabled:
When the RADIUS-Assigned VLAN is both globally
enabled and enabled (checked) for a given port, the switch reacts to VLAN ID
information carried in the RADIUS Access-Accept packet transmitted by the RADIUS
server when a supplicant is successfully authenticated. If it’s present and valid, the
port's “Port VLAN ID” will be changed to this VLAN ID. The port will be set to be a
member of that VLAN ID and will be forced into VLAN unaware mode. Once
assigned, all traffic arriving on the port will be classified and switched on the
RADIUS-assigned VLAN ID.