a.EAP packet format

∙Code: Type of the EAP packet, which can be Request (1), Response (2), Success (3), or Failure (4).

∙Identifier: Used for matching Responses with Requests.

∙Length: Length (in bytes) of the EAP packet, which is the sum of the Code, Identifier, Length, and Data fields.

∙Data: Content of the EAP packet. This field appears only in a Request or Response EAP packet. The field comprises the request type (or the response type) and the type data. Type 1 (Identify) and type 4 (MD5-challenge) are two examples for the type field.

EAPOL frame format

a shows the EAPOL frame format.

a.EAPOL frame format

∙PAE Ethernet type: Protocol type. It takes the value 0x888E for EAPOL.

∙Protocol version: The EAPOL protocol version used by the EAPOL packet sender.

∙Type: Type of the EAPOL packet. 2 lists the types of EAPOL packets that the HP implementation of 802.1X supports.

2.Types of EAPOL packets

Value

Type

Description

0x00

EAP-Packet

The client and the network access device uses

EAP-Packets to transport authentication information.

 

 

 

 

 

0x01

EAPOL-Start

The client sends an EAPOL-Start message to initiate

802.1X authentication to the network access device.

 

 

 

 

 

0x02

EAPOL-Logoff

The client sends an EAPOL-Logoff message to tell the

network access device that it is logging off.

 

 

 

 

 

∙Length: Data length in bytes, or length of the Packet body. If packet type is EAPOL-Start or EAPOL-Logoff, this field is set to 0, and no Packet body field follows.

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