HP 5920 Series - EAP Relay

67
Packet exchan
g
e method Benefits Limitations
EAP termination
Works with any RADIUS server that
supports PAP or CHAP
authentication.
• Supports only MD5-Challenge EAP
authentication and the "username +
password" EAP authentication
initiated by an HP iNode 802.1X
client.
• The processing is complex on the
network access device.
EAP relay
Figure 29 shows the basic 802.1X authentication procedure in EAP relay mode, assuming that EAP-MD5
is used.
Figure 29 802.1X authentication procedure in EAP relay mode
The following steps describe the 802.1X authentication procedure:
1. When a user launches the 802.1X client software and enters a registered username and password,
the 802.1X client software sends an EAPOL-Start packet to the network access device.
2. The network access device responds with an Identity EAP-Request packet to ask for the client
username.
EAPOL
EAPOR
(1) EAPOL-Start
(2) EAP-Request/Identity
(3) EAP-Response/Identity
(6) EAP-Request/MD5 challenge
(10) EAP-Success
(7) EAP-Response/MD5 challenge
(4) RADIUS Access-Request
(EAP-Response/Identity)
(5) RADIUS Access-Challenge
(EAP-Request/MD5 challenge)
(9) RADIUS Access-Accept
(EAP-Success)
(8) RADIUS Access-Request
(EAP-Response/MD5 challenge)
(11) EAP-Request/Identity
(12) EAP-Response/Identity
(13) EAPOL-Logoff
...
Client Device Authentication server
Port authorized
Port unauthorized
(14) EAP-Failure