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Cisco 802.1x验证过程

    1.当用户有上网需求时打开802.1X客户端程序,输入用户名和口令,发起连接请求。此时客户端程序将发出请求认证的报文给交换机,启动一次认证过程。

    如下:

    Frame 90 (64 bytes on wire, 64 bytes captured)

    Arrival Time: Nov 27, 2006 16:27:33.446030000

    Time delta from previous packet: 3.105345000 seconds

    Time since reference or first frame: 5.082965000 seconds

    Frame Number: 90

    Packet Length: 64 bytes

    Capture Length: 64 bytes

    Ethernet II, Src: 00:e0:4c:d7:65:cd, Dst: 01:80:c2:00:00:03

    Destination: 01:80:c2:00:00:03 (Spanning-tree-(for-bridges)_03)

    Source: 00:e0:4c:d7:65:cd (RealtekS_d7:65:cd)

    Type: 802.1X Authentication (0x888e)

    Trailer: A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5…

    Frame check sequence: 0xa5a5a5a5 (incorrect, should be 0xcc6d5b40)

    802.1x Authentication

    Version: 1

    Type: Start (1)

    Length: 0

    2.交换机在收到请求认证的数据帧后,将发出一个EAP-Request/Identitybaowe请求帧要求客户端程序发送用户输入的用户名。

    Frame 91 (64 bytes on wire, 64 bytes captured)

    Arrival Time: Nov 27, 2006 16:27:33.447236000

    Time delta from previous packet: 0.001206000 seconds

    Time since reference or first frame: 5.084171000 seconds

    Frame Number: 91

    Packet Length: 64 bytes

    Capture Length: 64 bytes

    Ethernet II, Src: 00:03:0f:01:3a:5a, Dst: 00:e0:4c:d7:65:cd

    Destination: 00:e0:4c:d7:65:cd (RealtekS_d7:65:cd)

    Source: 00:03:0f:01:3a:5a (DigitalC_01:3a:5a)

    Type: 802.1X Authentication (0x888e)

    Trailer: A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5A5…

    Frame check sequence: 0xa5a5a5a5 (incorrect, should be 0x7d263869)

    802.1x Authentication

    Version: 1

    Type: EAP Packet (0)

    Length: 5

    Extensible Authentication Protocol

    Code: Request (1)

    Id: 1

    Length: 5

    Type: Identity [RFC3748] (1)

    3.客户端程序响应交换机的请求,将包含用户名信息的一个EAP-Response/Identity送给交换机,交换机将客户端送来的数据帧经过封包处理后生成RADIUS Access-Request报文送给认证服务器进行处理。

    Frame 148 (77 bytes on wire, 77 bytes captured)

    Arrival Time: Nov 27, 2006 16:27:36.446199000

    Time delta from previous packet: 2.998963000 seconds

    Time since reference or first frame: 8.083134000 seconds

    Frame Number: 148

    Packet Length: 77 bytes

    Capture Length: 77 bytes

    Ethernet II, Src: 00:e0:4c:d7:65:cd, Dst: 01:80:c2:00:00:03

    Destination: 01:80:c2:00:00:03 (Spanning-tree-(for-bridges)_03)

    Source: 00:e0:4c:d7:65:cd (RealtekS_d7:65:cd)

    Type: 802.1X Authentication (0x888e)

    802.1x Authentication

    Version: 1

    Type: EAP Packet (0)

    Length: 59

    Extensible Authentication Protocol

    Code: Response (2)

    Id: 1

    Length: 13

    Type: Identity [RFC3748] (1)

    Identity (8 bytes): 03051020

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