HP 6125XLG R2306-HP 6125XLG Blade Switch Security Configuration Guide - Page 70

Packet formats EAP packet format Figure 23 shows the EAP packet format. Figure 23 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 Data 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 24 shows the EAPOL packet format. Figure 24 EAPOL packet format 0 7 15 PAE Ethernet type 2 Protocol version Type 4 Length 6 Packet body N • 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. Figure 25 lists the types of EAPOL packets supported by HP implementation of 802.1X. Figure 25 Types of EAPOL packets Value 0x00 0x01 Type EAP-Packet EAPOL-Start 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. 61