路由器中的PPP配置与DHCP服务器配置

拓扑图

如图所示，Router1与Router2之间使用PPP的pap认证方式，Router2与Router3之间使用chap认证方式

Router1为DHCP服务器，路由协议使用RIP

首先为各个路由器的端口设置地址

Router1的配置

Router>en
Router#conf t
Router(config)#hostname Router1
Router1(config)#enable secret 123  //为路由器的特权模式设置密码
Router1(config)#int s0/0/0
Router1(config-if)#ip addr 10.1.1.1 255.255.255.0
Router1(config-if)#clock rate 64000
Router1(config-if)#no shu
Router1(config-if)#exit
Router1(config)#int f0/0
Router1(config-if)#ip addr 192.168.11.1 255.255.255.0
Router1(config-if)#no shu
Router1(config-if)#exit
Router1(config)#

Router2的配置

Router>en
Router#conf t
Router(config)#hostname Router2
Router2(config)#enable secret 123 
Router2(config)#int s0/0/0
Router2(config-if)#ip addr 10.1.1.2 255.255.255.0
Router2(config-if)#no shu
Router2(config-if)#exit
Router2(config)#int s0/0/1
Router2(config-if)#ip addr 20.1.1.1 255.255.255.0
Router2(config-if)#clock rate 64000
Router2(config-if)#no shu
Router2(config-if)#exit
Router2(config)#int f0/0
Router2(config-if)#ip addr 192.168.22.1 255.255.255.0
Router2(config-if)#no shu
Router2(config-if)#exit
Router2(config)#

Router3的配置

Router>en
Router#conf t
Router(config)#hostname Router3
Router2(config)#enable secret 123
Router3(config)#int f0/0
Router3(config-if)#ip addr 192.168.33.1 255.255.255.0
Router3(config-if)#no shu
Router3(config-if)#exit
Router3(config)#int s0/0/0
Router3(config-if)#ip addr 20.1.1.2 255.255.255.0
Router3(config-if)#no shu
Router3(config-if)#exit

Router1与Router2之间的pap认证封装

Router1的配置

Router1(config)#username Router2 password 123  　　　　　　　　　//记录对端路由器的名字和密码
Router1(config)#int s0/0/0
Router1(config-if)#encapsulation ppp    　　　　　　　　　　　　　    //使用点对点协议
Router1(config-if)#ppp  authentication pap　　　　　　　　　　　　   //使用pap认证方式
Router1(config-if)#ppp pap sent-username Router1 password 123        //传输用户名和密码

Router2的配置

Router2(config)#username Router1 password 123
Router2(config)#int s0/0/0
Router2(config-if)#encapsulation ppp
Router2(config-if)#ppp authentication pap
Router2(config-if)#ppp pap sent-username Router2 passwo                 rd 123

查看Router1的端口状况

Router1#show ip interface brief
Interface              IP-Address      OK? Method Status                Protocol
 
FastEthernet0/0        192.168.11.1    YES manual up                    up
 
FastEthernet0/1        unassigned      YES NVRAM  administratively down down
 
Serial0/0/0            10.1.1.1        YES manual up                    up
 
Vlan1                  unassigned      YES NVRAM  administratively down down
Router1#

查看Router2的端口状况

Router2#show ip interface brief
Interface              IP-Address      OK? Method Status                Protocol
 
FastEthernet0/0        192.168.22.1    YES manual up                    up
 
FastEthernet0/1        unassigned      YES NVRAM  administratively down down
 
Serial0/0/0            10.1.1.2        YES manual up                    up
 
Serial0/0/1            20.1.1.1        YES manual up                    up
 
Vlan1                  unassigned      YES NVRAM  administratively down down
Router2#

查看Router1 的端口s0/0/0

Router1#show int s0/0/0
Serial0/0/0 is up, line protocol is up (connected)
  Hardware is HD64570
  Internet address is 10.1.1.1/24
  MTU 1500 bytes, BW 128 Kbit, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation PPP, loopback not set, keepalive set (10 sec) 　　　　//封装协议已为PPP
  LCP Open
  Open: IPCP, CDPCP

用Router1 ping Router2

Router1#ping 10.1.1.2

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.1.1.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 7/9/18 ms

Router1#

 

Router2与Router3之间的chap认证封装

 

Router2的配置

 

Router2(config)#username Router3 password 123
Router2(config)#int s0/0/1
Router2(config-if)#encapsulation ppp
Router2(config-if)#ppp authentication chap

 

Router3的配置

 

Router3(config)#username  Router2 password 123
Router3(config)#int s0/0/0
Router3(config-if)#encapsulation ppp
Router3(config-if)#ppp authentication chap

 

查看Router2 的端口s/0/0/1

 

Router2#show interface s0/0/1
Serial0/0/1 is up, line protocol is up (connected)
  Hardware is HD64570
  Internet address is 20.1.1.1/24
  MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,
     reliability 255/255, txload 1/255, rxload 1/255
  Encapsulation PPP, loopback not set, keepalive set (10 sec)
  LCP Open
  Open: IPCP, CDPCP

 

查看Router3端口状况

 

Router3#show ip interface  brief
Interface              IP-Address      OK? Method Status                Protocol
 
FastEthernet0/0        192.168.33.1    YES manual up                    up
 
FastEthernet0/1        unassigned      YES unset  administratively down down
 
Serial0/0/0            20.1.1.2        YES manual up                    up
 
Serial0/0/1            unassigned      YES unset  administratively down down
 
Vlan1                  unassigned      YES unset  administratively down down
Router3#

 

用Router3 ping Router2

 

Router3#ping 20.1.1.1

Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 20.1.1.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 1/7/10 ms

Router3#

 

配置RIP路由

 

Router1的配置

 

Router1(config)#router rip
Router1(config-router)#ver 2
Router1(config-router)#network 192.168.11.0
Router1(config-router)#network 10.1.1.0
Router1(config-router)#no auto-summary

 

Router2的配置

 

Router2(config)#router rip
Router2(config-router)#ver 2
Router2(config-router)#network 192.168.22.0
Router2(config-router)#network 10.1.1.0
Router2(config-router)#network 20.1.1.0
Router2(config-router)#no auto-summary

 

Router3的配置

 

Router3(config)#router rip
Router3(config-router)#ver 2
Router3(config-router)#network 192.168.22.0
Router3(config-router)#network 20.1.1.0
Router3(config-router)#no auto-summary

 

查看Router1的路由表

 

Router1#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
       D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
       N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
       E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
       i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
       * - candidate default, U - per-user static route, o - ODR
       P - periodic downloaded static route

Gateway of last resort is not set

     10.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
C       10.1.1.0/24 is directly connected, Serial0/0/0
C       10.1.1.2/32 is directly connected, Serial0/0/0
     20.0.0.0/8 is variably subnetted, 2 subnets, 2 masks
R       20.0.0.0/8 is possibly down, routing via 10.1.1.2, Serial0/0/0
R       20.1.1.0/24 [120/1] via 10.1.1.2, 00:00:26, Serial0/0/0
C    192.168.11.0/24 is directly connected, FastEthernet0/0
R    192.168.22.0/24 [120/1] via 10.1.1.2, 00:00:26, Serial0/0/0
R    192.168.33.0/24 [120/2] via 10.1.1.2, 00:00:26, Serial0/0/0
Router1#

 

在Router1上配置DHCP服务器

 

Router1(config)#ip dhcp pool pool-1     　　　　　　　　　　　　　　　　　　　　//创建地址池pool-1
Router1(dhcp-config)#network 192.168.11.0  255.255.255.0   　　　　　　　　　　//地址所划分网络的网络号
Router1(dhcp-config)#default-router 192.168.11.1   　　　　　　　　　　　　　　  //DHCP服务器分配的默认网关
Router1(dhcp-config)#exit
Router1(config)#ip dhcp excluded-address 192.168.11.1 192.168.11.5  　　　　　　//保留地址段 保留192.168.11.1~.5之间的地址
Router1(config)#ip dhcp pool pool-2
Router1(dhcp-config)#network 192.168.22.0 255.255.255.0
Router1(dhcp-config)#default-router 192.168.22.1
Router1(dhcp-config)#exit
Router1(config)#ip dhcp excluded-address 192.168.22.1 192.168.22.5
Router1(config)#ip dhcp pool pool-3
Router1(dhcp-config)#network  192.168.33.0 255.255.255.0
Router1(dhcp-config)#default-router  192.168.33.1
Router1(dhcp-config)#exit
Router1(config)#ip dhcp excluded-address 192.168.33.1 192.168.33.5

 

配置DHCP中继

 

Router2的配置

 

Router2(config)#int f0/0
Router2(config-if)#ip helper-address 10.1.1.1　　　　　　　//距离最近的DHCP服务器的端口的IP地址

 

Router3的配置

 

Router3(config)#int f0/0
Router3(config-if)#ip helper-address 10.1.1.1

 

查看PC机的地址

 

pc1

 

pc 2

pc 3

最后使用ping命令来检查网络

pc1 ping  pc2

pc1 ping pc3

实验结束