Controlled/Uncontrolled Port And Port Authorization Status; Packet Formats - HP 1920 Series User Manual

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Controlled/uncontrolled port and port authorization status

802.1X defines two logical ports for the network access port: controlled port and uncontrolled port. Any
packet arriving at the network access port is visible to both logical ports.
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Figure 299 Authorization state of a controlled port
In the unauthorized state, a controlled port controls traffic in one of the following ways:
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The device supports only unidirectional traffic control.

Packet formats

EAP packet format
Figure 300
Figure 300 EAP packet format
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MAC-based access control—Each user is separately authenticated on a port. When a user logs off,
no other online users are affected.
Controlled port—Allows incoming and outgoing traffic to pass through when it is in the authorized
state, and denies incoming and outgoing traffic when it is in the unauthorized state, as shown
in Figure 299. The controlled port is set in authorized state if the client has passed authentication,
and in unauthorized state, if the client has failed authentication.
Uncontrolled port—Is always open to receive and transmit EAPOL frames.
Authenticator system 1
Controlled port Uncontrolled port
Port unauthorized
LAN
Performs bidirectional traffic control to deny traffic to and from the client.
Performs unidirectional traffic control to deny traffic from the client.
shows the EAP packet format.
7
Code Identifier
Length
Data
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Authenticator system 2
Controlled port Uncontrolled port
Port authorized
LAN
15
2
4
N
322