HP (Hewlett-Packard) 445946-001 ユーザーズマニュアル

Port-based Network Access and traffic control

Port-based Network Access control

Port-based Network Access control provides a means of authenticating and authorizing devices attached

to a LAN port that has point-to-point connection characteristics. It prevents access to ports that fail

authentication and authorization. This feature provides security to all ports of the HP 10GbE switch
(except the management port 17).
The following topics are discussed in this section:

•

Extensible Authentication Protocol over LAN

•

802.1x Authentication Process

•

802.1x Port States

•

Supported RADIUS Attributes

•

Configuration Guidelines

Extensible authentication protocol over LAN

HP 10GbE switch software can provide user-level security for its ports using the IEEE 802.1x protocol,

which is a more secure alternative to other methods of port-based network access control. Any device

attached to an 802.1x-enabled port that fails authentication is prevented access to the network and

denied services offered through that port.
The 802.1x standard describes port-based network access control using Extensible Authentication

Protocol over LAN (EAPoL). EAPoL provides a means of authenticating and authorizing devices attached

to a LAN port that has point-to-point connection characteristics and of preventing access to that port in

cases of authentication and authorization failures.
EAPoL is a client-server protocol that has the following components:

•

Supplicant or Client—The Supplicant is a device that requests network access and provides the

required credentials (user name and password) to the Authenticator and the Authentication Server.

•

Authenticator—The Authenticator enforces authentication and controls access to the network. The

Authenticator grants network access based on the information provided by the Supplicant and the

response from the Authentication Server. The Authenticator acts as an intermediary between the

Supplicant and the Authentication Server: requesting identity information from the client, forwarding

that information (encapsulated in RADIUS packets) to the Authentication Server for validation,

relaying the server’s responses to the client, and authorizing network access based on the results of

the authentication exchange. The HP 10GbE switch acts as an Authenticator.

•

Authentication Server—The Authentication Server validates the credentials provided by the

Supplicant to determine if the Authenticator should grant access to the network. The Authentication

Server may be co-located with the Authenticator. The switch relies on external RADIUS servers for

authentication.

Upon a successful authentication of the client by the server, the 802.1x-controlled port transitions from
unauthorized to authorized state, and the client is allowed full access to services through the port. When

the client sends an EAP-Logoff message to the authenticator, the port will transition from authorized to

unauthorized state.