3Com MSR 50 Series Configuration Manual page 1732

1732 C 92: 802.1
HAPTER X
C
ONFIGURATION
Figure 500 EAPOL frame format
0
PAE Ethernet type
Protocol version
Packet body
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.
frames.
Table 52 Types of EAPOL frames
Type
EAP-Packet (a value of 0x00)
EAPOL-Start (a value of 0x01)
EAPOL-Logoff (a value of 0x02)
EAPOL-Key (a value of 0x03)
EAPOL-Encapsulated-ASF-Alert (a
value of 0x04)
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 frame. 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
7 15
Type
Length
Table 52
Description
Frame for carrying authentication information, present
between an authenticator system and the
authentication server.
A frame of this type is repackaged and transferred by
RADIUS to traverse complex networks to reach the
authentication server.
Frame for initiating authentication, present between a
supplicant and an authenticator.
Frame for logoff request, present between a supplicant
and an authenticator.
Frame for carrying key information, present between a
supplicant and an authenticator.
Frame for carrying alerting information compliant to
Alert Standard Forum (ASF).
A frame of this type carries network
management-related information like warning
messages and is terminated at the authenticator.
2
4
6
N
shows the defined types of EAPOL
Figure 501.