标签：网络
一、完成交换(r2)的配置
二、完成外网r7路由的配置，该设备模拟运营商的路由器，其上配置loopback接口0,并且分配IP地 址 200.100.100.1/24 用于模拟公网上的一个节点
配置R2，采用nat静态一对一IP映射，使得r7能够访问外网，外网也能通过公网地址访问r7
配置及实现
r7配置
!
interface Loopback0
ip address 200.100.100.1 255.255.255.255
!
interface Loopback1
no ip address
!
interface FastEthernet0/0
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/0
ip address 202.101.100.1 255.255.255.0
clock rate 64000
r2基本配置
!
interface FastEthernet0/0
ip address 192.168.100.1 255.255.255.0
duplex auto
speed auto
!
interface Serial0/0
no ip address
shutdown
clock rate 2000000
!
interface FastEthernet0/1
no ip address
shutdown
duplex auto
speed auto
!
interface Serial0/1
ip address 202.101.100.2 255.255.255.0
clock rate 64000
!
ip route 0.0.0.0 0.0.0.0 202.101.100.1
r2配置
!
interface FastEthernet0/0
ip address 192.168.100.2 255.255.255.0
duplex auto
speed auto
ip route 0.0.0.0 0.0.0.0 192.168.100.1
!
现在基本配置都配完了，但是r2可以ping通r1可以ping通的，因为他们在一个直连路由所以可以正常ping但是ping r7就不能ping通了
测试
ping r1路由
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 192.168.100.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 20/30/68 ms
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 202.101.100.2, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 4/47/68 ms
测试ping r7路由
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 202.101.100.1, timeout is 2 seconds:
.....
Success rate is 0 percent (0/5)
ping不通最重要的一个环节就是没有做nat 很多人遇到过这样的故障，现在我把NAT做上去测试网络
NAT配置 在r1上配置
R1(config)#ip nat inside source static 192.168.100.1 202.101.100.1
R1(config)#interface f0/0
R1(config-if)#ip nat inside
R1(config)#interface s0/1
R1(config-if)#ip nat outside
配置完成了现在再进行测试
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 202.101.100.1, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 12/36/64 ms
本文出自 “稻草人” 博客，谢绝转载！
标签：网络
原文地址：http://wuxinren.blog.51cto.com/3517704/1588965
