Eap Over Lans - H3C S5120-EI Series Operation Manual

EAP over LANs

EAPOL frame format
EAPOL, defined in 802.1X, is intended to carry EAP protocol packets between clients and devices over
LANs. Figure 1-3
Figure 1-3 EAPOL frame format
PAE Ethernet type: Protocol type. It takes the value 0x888E.
Protocol version: Version of the EAPOL protocol supported by the EAPOL frame sender.
Type: Type of the EAPOL frame.
Table 1-1 Types of EAPOL frames
Type
EAP-Packet (a value of 0x00)
EAPOL-Start (a value of 0x01)
EAPOL-Logoff (a value of 0x02)
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.
Packet body: Content of the packet. The format of this field varies with the value of the Type field.
EAP Packet Format
An EAPOL frame 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 1-4 EAP packet format
0
Code
Code: Type of the EAP packet, which can be Request, Response, Success, or Failure.
shows the EAPOL frame format.
Table 1-1
Frame for carrying authentication information, present between
a device and the authentication server.
A frame of this type is repackaged and transferred by RADIUS
to get through complex networks to reach the authentication
server.
Frame for initiating authentication, present between a client and
a device.
Frame for logoff request, present between a client and a device.
Figure 1-4.
7 15
Identifier
Length
Data
lists the types that the device currently supports.
Description
2
4
N
1-5