HP 5120 EI Switch Series User Manual

65
Figure 25 EAP packet format
0 15
Code
Data
Length
7
Identifier
2
4
N
 Code: Type of the EAP packet. Options include 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 packet format
Figure 26 shows the EAPOL packet format.
Figure 26 EAPOL packet format
0 15
PAE Ethernet type
Packet body
TypeProtocol version
Length
7
2
4
6
N
 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. Table 5 lists the types of EAPOL packets that the HP implementation
of 802.1X supports.
Table 5 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.

HP 5120 EI Switch Series Specifications

General

Brand	HP
Model	5120 EI Switch Series
Category	Switch
Language	English