HCIE培训Datacom考试技术笔记学习-PPP报文类型-WOLFLAB

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LCP阶段的报文：

con-request：

Frame 9: 18 bytes on wire (144 bits), 18 bytes captured (144 bits) on interface -, id 0

Point-to-Point Protocol

    Address: 0xff                                                               //没意义固定为0XFF，因太链路不需要MAC地址

    Control: 0x03                                                              //没意义固定为0X03    ，表示无序号帧，表示不可靠传输；                              

    Protocol: Link Control Protocol (0xc021)                   //表示上层是个什么报文

PPP Link Control Protocol

    Code: Configuration Request (1)                               //表示报文的类型

    Identifier: 2 (0x02)                                                      //标识符没啥用，就跟IP头部那个ID有点像

    Length: 14

    Options: (10 bytes), Maximum Receive Unit, Magic Number

        Maximum Receive Unit: 1500                               //MRU，采用TLV的方式携带

            Type: Maximum Receive Unit (1)

            Length: 4

            Maximum Receive Unit: 1500

        Magic Number: 0x0020a1db                                //魔术字，采用TLV的方式携带

            Type: Magic Number (5)

            Length: 6

            Magic Number: 0x0020a1db

con-ack：就是把request里面的内容确认一遍

Frame 10: 18 bytes on wire (144 bits), 18 bytes captured (144 bits) on interface -, id 0

Point-to-Point Protocol

    Address: 0xff

    Control: 0x03

    Protocol: Link Control Protocol (0xc021)

PPP Link Control Protocol

    Code: Configuration Ack (2)

    Identifier: 2 (0x02)

    Length: 14

    Options: (10 bytes), Maximum Receive Unit, Magic Number

        Maximum Receive Unit: 1500

            Type: Maximum Receive Unit (1)

            Length: 4

            Maximum Receive Unit: 1500

        Magic Number: 0x0020a1db

            Type: Magic Number (5)

            Length: 6

            Magic Number: 0x0020a1db

注意：

①address+control一起来标识PPP报文，PPP报头为FF03，用于表示帧的类型，注意，address和control分开有各自的意义，但是用不上了，那就合在一起来表示PPP报文；

PAP认证阶段的报文：

auth-request：

Frame 2233: 23 bytes on wire (184 bits), 23 bytes captured (184 bits) on interface -, id 0

Point-to-Point Protocol

    Address: 0xff

    Control: 0x03

    Protocol: Password Authentication Protocol (0xc023)

PPP Password Authentication Protocol

    Code: Authenticate-Request (1)

    Identifier: 1

    Length: 19

    Data

        Peer-ID-Length: 4

        Peer-ID: wolf

        Password-Length: 9

        Password: wolf-hcie

auth-ack：

Frame 2234: 52 bytes on wire (416 bits), 52 bytes captured (416 bits) on interface -, id 0

Point-to-Point Protocol

    Address: 0xff

    Control: 0x03

    Protocol: Password Authentication Protocol (0xc023)

PPP Password Authentication Protocol

    Code: Authenticate-Ack (2)

    Identifier: 1

    Length: 48

    Data

        Message-Length: 43

        Message: Welcome to use Quidway ROUTER, Huawei Tech.

auth-nak：

Frame 2257: 9 bytes on wire (72 bits), 9 bytes captured (72 bits) on interface -, id 0

Point-to-Point Protocol

    Address: 0xff

    Control: 0x03

    Protocol: Password Authentication Protocol (0xc023)

PPP Password Authentication Protocol

    Code: Authenticate-Nak (3)

    Identifier: 1

    Length: 5

    Data

        Message-Length: 0

        Message:

ter-request：

Frame 2262: 8 bytes on wire (64 bits), 8 bytes captured (64 bits) on interface -, id 0

Point-to-Point Protocol

    Address: 0xff

    Control: 0x03

    Protocol: Link Control Protocol (0xc021)

PPP Link Control Protocol

    Code: Termination Request (5)

    Identifier: 9 (0x09)

    Length: 4

ter-ack：

Frame 2263: 8 bytes on wire (64 bits), 8 bytes captured (64 bits) on interface -, id 0

Point-to-Point Protocol

    Address: 0xff

    Control: 0x03

    Protocol: Link Control Protocol (0xc021)

PPP Link Control Protocol

    Code: Termination Ack (6)

    Identifier: 9 (0x09)

    Length: 4

CHAP认证阶段的报文：

挑战报文：

Frame 326: 25 bytes on wire (200 bits), 25 bytes captured (200 bits) on interface -, id 0

Point-to-Point Protocol

    Address: 0xff

    Control: 0x03

    Protocol: Challenge Handshake Authentication Protocol (0xc223)

PPP Challenge Handshake Authentication Protocol

    Code: Challenge (1)

    Identifier: 1

    Length: 21

    Data

        Value Size: 16

        Value: 254422655b51b640c5de6ad0cb67bbd2

Response报文：

Frame 327: 29 bytes on wire (232 bits), 29 bytes captured (232 bits) on interface -, id 0

Point-to-Point Protocol

    Address: 0xff

    Control: 0x03

    Protocol: Challenge Handshake Authentication Protocol (0xc223)

PPP Challenge Handshake Authentication Protocol

    Code: Response (2)

    Identifier: 1

    Length: 25

    Data

        Value Size: 16

        Value: 977be4e630a98b4d6177aa91c3946f80

        Name: wolf

成功报文：

Frame 328: 20 bytes on wire (160 bits), 20 bytes captured (160 bits) on interface -, id 0

Point-to-Point Protocol

    Address: 0xff

    Control: 0x03

    Protocol: Challenge Handshake Authentication Protocol (0xc223)

PPP Challenge Handshake Authentication Protocol

    Code: Success (3)

    Identifier: 1

    Length: 16

    Message: Welcome to .

失败报文：

Frame 348: 33 bytes on wire (264 bits), 33 bytes captured (264 bits) on interface -, id 0

Point-to-Point Protocol

    Address: 0xff

    Control: 0x03

    Protocol: Challenge Handshake Authentication Protocol (0xc223)

PPP Challenge Handshake Authentication Protocol

    Code: Failure (4)

    Identifier: 1

    Length: 29

    Message: Illegal User or password.

NCP阶段报文：

con-request：

Frame 2419: 14 bytes on wire (112 bits), 14 bytes captured (112 bits) on interface -, id 0

Point-to-Point Protocol

    Address: 0xff

    Control: 0x03

    Protocol: Internet Protocol Control Protocol (0x8021)

PPP IP Control Protocol

    Code: Configuration Request (1)

    Identifier: 1 (0x01)

    Length: 10

    Options: (6 bytes), IP Address

        IP Address

            Type: IP Address (3)

            Length: 6

            IP Address: 1.1.12.1

con-ack：就是把request里面的内容确认一遍

Frame 2421: 14 bytes on wire (112 bits), 14 bytes captured (112 bits) on interface -, id 0

Point-to-Point Protocol

    Address: 0xff

    Control: 0x03

    Protocol: Internet Protocol Control Protocol (0x8021)

PPP IP Control Protocol

    Code: Configuration Ack (2)

    Identifier: 1 (0x01)

    Length: 10

    Options: (6 bytes), IP Address

        IP Address

            Type: IP Address (3)

            Length: 6

            IP Address: 1.1.12.1

LCP建立完成通过request和reply维持一段链路

request：

Frame 32: 12 bytes on wire (96 bits), 12 bytes captured (96 bits) on interface -, id 0

Point-to-Point Protocol

    Address: 0xff

    Control: 0x03

    Protocol: Link Control Protocol (0xc021)

PPP Link Control Protocol

    Code: Echo Request (9)

    Identifier: 37 (0x25)

    Length: 8

    Magic Number: 0x5c8c3e16

reply：

Frame 33: 12 bytes on wire (96 bits), 12 bytes captured (96 bits) on interface -, id 0

Point-to-Point Protocol

    Address: 0xff

    Control: 0x03

    Protocol: Link Control Protocol (0xc021)

PPP Link Control Protocol

    Code: Echo Reply (10)

    Identifier: 37 (0x25)

    Length: 8

    Magic Number: 0x11676e86

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