Evidence Cross-8/HPoE-10G, Руководство пользователя

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The value can only be changed if the Guest VLAN option is globally enabled.
Port Configuration

Port :
The port number for which the configuration below applies.

Admin State :
If 802.1X is globally enabled, this selection controls the port's authentication mode. The
following modes are available:

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.

Port-based 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. Frames sent between the supplicant and the switch are special
802.1X frames, known as EAPOL (EAP Over LANs) frames. EAPOL frames encapsulate EAP
PDUs (
RFC3748 ). Frames sent between the switch and the RADIUS server are RADIUS
packets. RADIUS packets also encapsulate EAP PDUs together with other attributes like
the switch's IP address, name, and the supplicant's port number on the switch. EAP is
very flexible, in that it allows for different authentication methods, like
MD5-Challenge ,
PEAP , and TLS . The important thing is that 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.
When authentication is complete, the RADIUS server sends a special packet containing a
success or failure indication. Besides forwarding this decision to the supplicant, the
switch uses it to open up or block traffic on the switch port connected to the supplicant
N
OTE
: Suppose two backend servers are enabled and that the server
timeout is configured to X seconds (using the AAA configuration
page), and suppose that the first server in the list is currently down
(but not considered dead).
Now, if the supplicant retransmits EAPOL Start frames at a rate faster
than X seconds, then it will never get authenticated, because the
switch will cancel on-going backend authentication server requests
whenever it receives a new EAPOL Start frame from the supplicant.
And since the server hasn't yet failed (because the X seconds haven't
expired), the same server will be contacted upon the next backend
authentication server request from the switch. This scenario will loop
forever. Therefore, the server timeout should be smaller than the
supplicant's EAPOL Start frame retransmission rate.

Single 802.1X :
In port-based 802.1X authentication, once a supplicant is successfully authenticated on