HP V1910 Switch Series User Manual page 328

Figure 280 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
Figure 281 shows the EAPOL frame format.
Figure 281 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.

implementation of 802.1X supports.
Table 117 Types of EAPOL packets
Value
0x00
0x01
0x02
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.
Packet body: Content of the packet. When the EAPOL packet type is EAP-Packet, the Packet body

field contains an EAP packet.
Table 1 17
Type
EAP-Packet
EAPOL-Start
EAPOL-Logoff
314
lists the types of EAPOL packets that the HP
Description
The client and the network access device uses
EAP-Packets to transport authentication information.
The client sends an EAPOL-Start message to initiate
802.1X authentication to the network access device.
The client sends an EAPOL-Logoff message to tell the
network access device that it is logging off.