实验拓扑图如下所示

操作步骤：

步骤1：连接网络拓扑图。

步骤2：RouterA基本配置。

Router>enable                             ！进入特权模式

Router#config                              ！进入全局配置模式

Router_config#hostname RouterA        ！设置路由器名称

RouterA_config#username RouterB password digital       ！设置用户名和密码

RouterA_config#aaa authentication ppp default local           

       ！设置PPP认证方式为本地用户认证

RrouterA_config#interface s0/1                              ！进入串口0/1接口模式

RouterA_config_s0/1#ip address 192.168.1.1 255.255.255.0           ！设置IP地址

RouterA_config_s0/1#physical-layer speed 64000           ！设置时钟频率

RouterA_config_s0/1#no shutdown                       ！开启端口

步骤3：RouterB基本配置。

Router>enable                         ！进入特权模式

Router#config                         ！进入全局配置模式

Router_config#hostname RouterB               ！设置路由器名称

RrouterB_config#username RrouterA password digital    ！设置用户名和密码

RrouterB_config#aaa authentication ppp default local    

       ！设置PPP认证方式为本地用户认证

RouterB_config#interface s0/2                      ！进入串口0/1接口模式

RrouterB_config_s0/2#ip address 192.168.1.2 255.255.255.0  ！设置IP地址

RrouterB_config_s0/2#no shutdown                      ！开启端口

步骤4：查看RouterA的接口信息。

RouterA#show ip interface brief              ！查看路由器A的接口信息

Interface                  IP-Address      Method Protocol-Status

Async0/0                   unassigned      manual down

Serial0/1                  192.168.1.1     manual up

Serial0/2                  unassigned      manual down

FastEthernet0/0            unassigned      manual down

FastEthernet0/3            unassigned      manual down

步骤5：测试RouterA与RouterB的连通性。

RouterB#ping 192.168.1.1

PING 192.168.1.1 (192.168.1.1): 56 data bytes

!!!!!

--- 192.168.1.1 ping statistics ---

5 packets transmitted, 5 packets received, 0% packet loss

round-trip min/avg/max = 20/22/30 ms

步骤6：在RouterA上配置CHAP验证。

RouterA_config#interface s0/1                                   ！进入串口0/1接口模式

RouterA_config_s0/1#encapsulation ppp                     ！封装点对点协议

RouterA_config_s0/1#ppp authentication chap                 ！设置认证方式为CHAP

RrouterA_config_s0/1#ppp chap hostname RouterA        ！设置发送给对方的用户名

RrouterA_config_s0/1#ppp chap password digital         ！设置发送给对方的密码

步骤7：查看RouterA的接口信息。

RrouterA#show ip interface brief

Interface              IP-Address      Method Protocol-Status

Async0/0                   unassigned      manual down

Serial0/1                  192.168.1.1     manual down

Serial0/2                  unassigned      manual down

FastEthernet0/0            unassigned      manual down

FastEthernet0/3            unassigned      manual down

步骤8：查看RouterA的串口信息。

RrouterA#show interface s0/1     

！查看路由器A的s0/1接口信息

• Serial0/1 is up, line protocol is down
•  Mode=Sync DCE Speed=64000
•   DTR=UP,DSR=UP,RTS=UP,CTS=UP,DCD=UP
•   MTU 1500 bytes, BW 64 kbit, DLY 2000 usec
•   Interface address is 192.168.1.1/24
•   Encapsulation PPP, loopback not set
•   Keepalive set(10 sec)
•   LCP  Opened
• CHAP Listening -- waiting for remote host to attempt open,    Message: 'CHAP:
• Invalid Response'
•   IPCP Listening -- waiting for remote host to attempt open
•  local IP address: 192.168.1.1  remote IP address: 0.0.0.0
•   60 second input rate 0 bits/sec, 0 packets/sec!
•   60 second output rate 0 bits/sec, 0 packets/sec!
• 71 packets input, 1878 bytes, 3 unused_rx, 0 no buffer
• 0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort
• 67 packets output, 1766 bytes, 8 unused_tx, 0 underruns
•   error: 0 clock, 0 grace
•   PowerQUICC SCC specific errors:
•     0 recv allocb mblk fail     0 recv no buffer
• 0 transmitter queue full    0 transmitter hwqueue_full

步骤9：在RouterB上配置CHAP验证

RouterB_config#interface s0/2                        ！进入串口0/2接口模式

RouterB_config_s0/2#encapsulation ppp                ！封装点对点协议

RouterB_config_s0/2#ppp authentication chap           ！设置认证方式为CHAP

RrouterB_config_s0/2#ppp chap hostname RouterB       ！设置发送给对方的用户名

RouterB_config_s0/2#ppp chap password digital       ！设置发送给对方的密码

步骤10：查看RouterA的串口信息

RouterA#show interface s0/1                             ！查看RouterA的s0/1口信息

Serial0/1 is up, line protocol is up

 Mode=Sync DCE Speed=64000

  DTR=UP,DSR=UP,RTS=UP,CTS=UP,DCD=UP

  MTU 1500 bytes, BW 64 kbit, DLY 2000 usec

  Interface address is 192.168.1.1/24

Encapsulation PPP, loopback not set

  Keepalive set(10 sec)

LCP  Opened

  CHAP Opened,  Message: ' Welcome to Digitalchina Router'   !表示认证成功

  IPCP Opened

       local IP address: 192.168.1.1  remote IP address: 192.168.1.2

  60 second input rate 44 bits/sec, 0 packets/sec!

  60 second output rate 44 bits/sec, 0 packets/sec!

27 packets input, 701 bytes, 5 unused_rx, 0 no buffer

    0 input errors, 0 CRC, 0 frame, 0 overrun, 0 ignored, 0 abort

    28 packets output, 726 bytes, 8 unused_tx, 0 underruns

  error:  

 0 clock, 0 grace

  PowerQUICC SCC specific errors:

    0 recv allocb mblk fail     0 recv no buffer

0 transmitter queue full    0 transmitter hwqueue_full