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PowerFlex
8/24/48 Port GbE PoE Managed Switch User’s Guide
authentication method, so the RADIUS server must be configured accordingly.
When authentication is complete, the RADIUS server sends a success or
failure indication, which in turn causes the switch to open up or block traffic for
that particular client, using the Port Security module. Only then will frames from
the client be forwarded on the switch. There are no EAPOL frames involved in
this authentication, and therefore, MAC-based Authentication has nothing to do
with the 802.1X standard.
The advantage of MAC-based authentication over 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, and that the clients
do not need special supplicant software to authenticate. The advantage of
MAC-based authentication over 802.1X-based authentication is that 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 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 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 is 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
(which may be changed by the administrator in the meanwhile without affecting
the RADIUS-assigned).
This option is only available for single-client modes, i.e.
• • 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 [0; 3]
RADIUS-Assigned VLAN
Enabled
When 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 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 the port 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.
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Revised: October 30, 2013
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