H3C Technologies H3C S7500E Series Switches - Manual (Page 94)

5-4
Figure 5-3 EAPOL packet format
z PAE Ethernet type: Protocol type. It takes the value 0x888E.
z Protocol version: Version of the EAPOL protocol supported by the EAPOL packet sender.
z Type: Type of the EAPOL packet. Table 5-1 lists the types that the device currently
supports.
Table 5-1 Types of EAPOL packets
Value Type Description
0x00 EAP-Packet
Packet for carrying authentication information. A
packet of this type is repackaged and transferred
by RADIUS on the device to get through complex
networks to reach the authentication server.
0x01 EAPOL-Start
Packet for initiating authentication, present
between a client and a device.
0x02 EAPOL-Logoff
Packet for logoff request, present between a client
and a device.
z Length: Length of the data, that is, length of the Packet body field, in bytes. If the value of
this field is 0, no subsequent data field is present.
z Packet body: Content of the packet. The format of this field varies with the value of the
Type field.
EAP Packet Format
An EAPOL packet of the type of EAP-Packet carries an EAP packet in its Packet body field. The
format of the EAP packet is shown in Figure 5-4 .
Figure 5-4 EAP packet format
0 15
Code
Data
Length
7
Identifier 2
4
N
z Code: Type of the EAP packet, which can be Request, Response, Success, or Failure.