PPP
一、概念:
一种点到点链路层协议,主要作用于全双工的的同步传输或异步传输
二、组成:
1.链路控制协议(LCP)
协商:最大接收单元、认证模式、魔术字
2.网络控制协议(NCP)
三、协商流程
四、PPP帧格式
1.LCP
LCP报文的类型
Configure:配置
Request:请求
Ack:Acknowledgement 确认
Nak:Negative Acknowledgement:否定确认
Reject:拒绝
LCP的参数:
MRU:Maximum-Receive-Unit(最大接收单元)
MTU:Maximum-Transger-Unit(最大传输单元)
五、协商结果
1.成功
2.失败
1)参数不认可
2)参数不识别
六、认证模式
1.PAP(密码认证协议:Password Authentication Protocol)
2.CHAP(挑战握手认证协议:Challenge Handshake‘ Authentication Protocol)
七、地址协商
1.静态地址协商
2.动态地址协商
八、认证模式配置
1.PAP
<Huawei>sys
[Huawei]sysname R1
[R1]int s0/0/0
[R1]ip ad 10.0.12.1 24
[R1-Serial0/0/0]link-protocol ppp
[R1]aaa
[R1-aaa]local-user wangliguo password cipher wangliguo
[R1-aaa]local-user wangliguo service-type ppp
[R1-aaa]int s0/0/0
[R1-Serial0/0/0]ppp authentication-mode pap
<Huawei>sys
[Huawei]sysname R2
[R2]int s0/0/0
[R2]ip ad 10.0.12.1 24
[R2-Serial0/0/0]link-protocol ppp
[R2-Serial0/0/0]ppp pap local-user wangliguo password cipher wangliguo
2.CHAP
<Huawei>sys
[Huawei]sys R3
[R3]int s0/0/1
[R3-Serial0/0/1]ip ad 10.0.34.3 24
[R3-Serial0/0/1]link-protocol ppp
[R3]aaa
[R3-aaa]local-user wangliguo password cipher wangliguo
[R3-aaa]local-user wangliguo service-type ppp
[R3]int s0/0/1
[R3-Serial0/0/1]ppp authentication-mode chap
<Huawei>sys
[Huawei]sys R4
[R4]int s0/0/1
[R4-Serial0/0/1]ip address 10.0.34.4 24
[R4-Serial0/0/1]link-protocol ppp
[R4-Serial0/0/1]ppp chap user wangliguo
[R4-Serial0/0/1]ppp chap password cipher wangliguo