Packet Formats - H3C S5500-EI Series Security Configuration Manual

Packet formats

EAP packet format
Figure 36 shows the EAP packet format.
Figure 36 EAP packet format
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. The EAP packet length 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 37 shows the EAPOL packet format.
Figure 37 EAPOL packet 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.
Table 5 EAPOL packet types
Value
0x00
0x01
Table 5 lists the types of EAPOL packets supported by H3C
Type
EAP-Packet
EAPOL-Start
80
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.