这里是本网路由器配置清单。
Router#sh run
Building Configuration...
Current configuration
version 11.2
service udp-small-servers
service tcp-small-servers
hostname Router
enable secret test
ip subnet-zero
interface Ethernet0
description the LAN port link to my local network
ip address 202.96.199.1 255.255.255.0
interface Serial0
description the WAN port link to Internet
ip address 202.98.0.2 255.255.255.252
bandwidth 128
interface Serial1
no ip address
shutdown
ip domain-name xxx.com
ip name-server 202.96.202.96
ip name-server 202.96.96.202
ip classless
ip route 0.0.0.0 0.0.0.0 202.98.0.1
line con 0
line aux 0
line vty 0 4
password telnet
login
end
Router#
/****** A网路由器 ******/
Router-A#conf t(切换到配置状态)
Router-A(config)#int e0(配置Ethernet 0口)
Router-A(config-if)#description the LAN port link to my local network(端口说明)
Router-A(config-if)#ip add 202.96.199.1 255.255.255.0
(定义以太网IP地址,子网掩码表示为C类网络)
Router-A(config-if)#no shutdown(激活端口)
Router-A(config-if)#exit
Router-A(config)#int s0(配置Serial 0口)
Router-A(config-if)#description the WAN port link to Router-B(端口说明)
Router-A(config-if)#ip add 202.98.0.1 255.255.255.252(定义互联广域网IP地址)
Router-A(config-if)#bandwidth 128(定义端口速率,单位:kbps)
Router-A(config-if)#no shutdown(激活端口)
Router-A(config-if)#exit
Router-A(config)#ip route 202.97.76.0 255.255.255.224 202.98.0.2
(定义静态路由,通过网关到达对端局域网络,IP为对端广域网IP地址)
Router-A(config)#exit
Router-A#wr m(保存配置)
/****** B网路由器 ******/
Router-B#conf t
Router-B(config)#int e0
Router-B(config-if)#description the LAN port link to my local network(端口说明)
Router-B(config-if)#ip add 202.97.76.1 255.255.255.224
(定义以太网IP地址,子网掩码表示为拥有32个地址的子网)
Router-B(config-if)#no shutdown
Router-B(config-if)#exit
Router-B(config)#int s0
Router-B(config-if)#description the WAN port link to Router-A(端口说明)
Router-B(config-if)#ip add 202.98.0.2 255.255.255.252
Router-B(config-if)#bandwidth 128
Router-B(config-if)#no shutdown
Router-B(config-if)#exit
Router-B(config)#ip route 202.96.199.0 255.255.255.0 202.98.0.1
(定义静态路由,通过网关到达对端局域网络,IP为对端广域网IP地址)
Router-B(config)#exit
Router-B#wr m(保存配置)
配置完成。
这里是A网、B网路由器配置清单。
Router A:
Router-A#sh run
Building Configuration...
Current configuration
version 11.2
service udp-small-servers
service tcp-small-servers
hostname Router-A
enable secret test-a
ip subnet-zero
interface Ethernet0
description the LAN port link to my local network
ip address 202.96.199.1 255.255.255.0
interface Serial0
description the WAN port link to Router-B
ip address 202.98.0.1 255.255.255.252
bandwidth 128
interface Serial1
no ip address
shutdown
ip domain-name xxx.com
ip name-server 202.96.199.2
ip name-server 202.96.199.3
ip classless
ip route 202.97.76.0 255.255.255.224 202.98.0.2
line con 0
line aux 0
line vty 0 4
password telnet-a
login
end
Router-A#
Rouer B:
Router-B#sh run
Building Configuration...
Current configuration
version 11.2
service udp-small-servers
service tcp-small-servers
hostname Router-B
enable secret test-b
ip subnet-zero
interface Ethernet0
description the LAN port link to my local network
ip address 202.97.76.1 255.255.255.224
interface Serial0
description the WAN port link to Router-A
ip address 202.98.0.2 255.255.255.252
bandwidth 128
interface Serial1
no ip address
shutdown
ip domain-name yyy.com
ip name-server 202.96.199.2
ip name-server 202.96.199.3
ip classless
ip route 202.96.199.0 255.255.255.0 202.98.0.1
line con 0
line aux 0
line vty 0 4
password telnet-b
login
end
Router-B#
实例2:通过Cisco 2501将你的局域网接入Internet
假设实验条件如下: 本网IP地址为:202.96.199.0——202.96.199.255
DNS Server:202.96.202.96(主),202.96.96.202(备)
ISP分配的广域网互联IP地址为202.98.0.2