Rev.A0
1-Mar-11
148
The Fig. 3-55 shows the procedure of 802.1X authentication. There are steps
for the login based on 802.1X port access control management. The protocol used
in the right side is EAPOL and the left side is EAP.
1.
At the initial stage, the supplicant A is unauthenticated and a port
on switch acting as an authenticator is in unauthorized state. So the
access is blocked in this stage.
2.
Initiating a session. Either authenticator or supplicant can initiate
the message exchange. If supplicant initiates the process, it sends
EAPOL-start packet to the authenticator PAE and authenticator will
immediately respond EAP-Request/Identity packet.
3.
The authenticator always periodically sends EAP-Request/Identity
to the supplicant for requesting the identity it wants to be
authenticated.
4. If the authenticator doesn’t send EAP-Request/Identity, the
supplicant will initiate EAPOL-Start the process by sending to the
authenticator.
5.
And next, the Supplicant replies an EAP-Response/Identity to the
authenticator. The authenticator will embed the user ID into Radius-
Access-Request command and send it to the authentication server
for confirming its identity.
6.
After receiving the Radius-Access-Request, the authentication
server sends Radius-Access-Challenge to the supplicant for asking
for inputting user password via the authenticator PAE.
7.
The supplicant will convert user password into the credential
information, perhaps, in MD5 format and replies an EAP-Response
with this credential information as well as the specified
authentication algorithm (MD5 or OTP) to Authentication server via
the authenticator PAE. As per the value of the type field in message
PDU, the authentication server knows which algorithm should be
applied to authenticate the credential information, EAP-MD5
(Message Digest 5) or EAP-OTP (One Time Password) or other
else algorithm.
Supplicant A
B
C
Authentication server
Authenticator
Fig. 3-54
Summary of Contents for SM8T2DPA
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Page 7: ...Rev A0 1 May 11 v Revision History Date Revision 05 01 2010 A0...
Page 90: ...Rev A0 1 Mar 11 88 Fig 3 36 Fig 3 37 Fig 3 38...
Page 91: ...Rev A0 1 May 11 89 Fig 3 39 Fig 3 40 Fig 3 41 Fig 3 42...
Page 104: ...Rev A0 1 Mar 11 102 Fig 3 61 Set up VLAN Tag Priority Mapping...
Page 105: ...Rev A0 1 May 11 103 Fig 3 62 Set up VLAN Tag Priority Mapping Finish...
Page 113: ...Rev A0 1 May 11 111 Fig 3 69 Frame Type Fig 3 70...
Page 114: ...Rev A0 1 Mar 11 112 Fig 3 71 Fig 3 72 Fig 3 73 ARP...
Page 115: ...Rev A0 1 May 11 113 Fig 3 74 ARP Fig 3 75 ARP Fig 3 76 ARP Fig 3 77 ARP...
Page 116: ...Rev A0 1 Mar 11 114 Fig 3 79 ARP Fig 3 80 ARP Fig 3 81 ARP...
Page 117: ...Rev A0 1 May 11 115 Fig 3 82 ARP Fig 3 83 ARP Fig 3 84 ARP Fig 3 85 ARP Fig 3 86 ARP...
Page 118: ...Rev A0 1 Mar 11 116 Fig 3 87 ARP Fig 3 88 IPv4...
Page 119: ...Rev A0 1 May 11 117 Fig 3 89 IPv4 Fig 3 90 IPv4 Fig 3 91 IPv4 Fig 3 92 IPv4 Fig 3 93 IPv4...
Page 120: ...Rev A0 1 Mar 11 118 Fig 3 94 IPv4 Fig 3 95 IPv4 Fig 3 96 IPv4 Fig 3 97 IPv4 Fig 3 98 IPv4...
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Page 127: ...Rev A0 1 May 11 125 Fig 3 118 Action Fig 3 119 Rate Limiter...
Page 128: ...Rev A0 1 Mar 11 126 Fig 3 120 Port Copy Fig 3 121 DMAC Filter...
Page 129: ...Rev A0 1 May 11 127 Fig 3 122 VLAN ID Filter Fig 3 123 VLAN ID Filter Fig 3 124 Tag Priority...
Page 218: ...Rev A0 1 Mar 11 216 Fig 4 1...
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