QTECH QSW-3400 Инструкция по настройке - Manual (Page 323)

+7(495) 797-3311 www.qtech.ru
Москва, Новозаводская ул., 18, стр. 1
322
Handshake Authentication Protocol) attributes to do the authentication interaction with
the RADIUS server.

When the user pass the authentication, the authentication server system will send the
relative information of the user to authenticator system, the PAE of the authenticator
system will decide the authenticated/unauthenticated status of the controlled port
according to the authentication result of the RADIUS server.
40.1.3 The Encapsulation of EAPOL Messages
1. The Format of EAPOL Data Packets
EAPOL is a kind of message encapsulation format defined in 802.1x protocol, and is mainly
used to transmit EAP messages between the supplicant system and the authenticator system
in order to allow the transmission of EAP messages through the LAN. In IEEE 802/Ethernet
LAN environment, the format of EAPOL packet is illustrated in the next figure. The beginning of
the EAPOL packet is the Type/Length domain in MAC frames.
the Format of EAPOL Data Packet
PAE Ethernet Type: Represents the type of the protocol whose value is 0x888E.
Protocol Version: Represents the version of the protocol supported by the sender of EAPOL
data packets.
Type: represents the type of the EAPOL data packets, including:

EAP-Packet (whose value is 0x00): the authentication information frame, used to carry
EAP messages. This kind of frame can pass through the authenticator system to
transmit EAP messages between the supplicant system and the authentication server
system.

EAPOL-Start (whose value is 0x01): the frame to start authentication.

EAPOL-Logoff (whose value is 0x02): the frame requesting to quit.

EAPOL-Key (whose value is 0x03): the key information frame.

EAPOL-Encapsulated-ASF-Alert (whose value is 0x04): used to support the Alerting
messages of ASF (Alert Standard Forum). This kind of frame is used to encapsulate