发布ospf的路由协议，实现企业级网络通信
路由器的配置思路：
1，应用性：
1）配置端口：
1>局域网端口：
(config)#interface 端口
(config-if)#ip address IP地址 掩码
//给端口配置IP地址，掩码
(config-if)#no shutdown
//激活端口
2>广域网端口
(config)#interface 端口
(config-if)#ip address IP地址 掩码
//给端口配置IP地址，掩码
(config-if)#encapsulation 广域网协议
//封装协议
(config-if)# clock rate 56000/64000
// 可选项，指定时钟频率
(config-if)#no shutdown
（config-router）#router ospf 区域号
（config-router）#net 网络号/子网号/具体IP 匹配码 area 区域号
试验环境：PC1 192.168.10.2 网关192.168.10.1
PC2: 192.168.20.2 网关192.168.20.1
路由器A S0:202.110.100.1
路由器B, S0:202.110.100.2
路由器A和PC1是公司的总部，路由器B和PC2是公司的分支机构，现在要实现总部和分支机构的通信，在中间的干线上采用DDN干线。
利用动态路由配置企业级环境需求：
路由器A上的操作。
Router>
Router>
Router>en
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#host A
A(config)#int e0
A(config-if)#ip addr 192.168.10.1 255.255.255.0
A(config-if)#no shut
%LINK-3-UPDOWN: Interface Ethernet0, changed state to up
A(config-if)#int s0
A(config-if)#ip addr 202.110.100.1 255.255.255.0
A(config-if)#encap hdlc
A(config-if)#clock rate 56000
A(config-if)#no shut
%LINK-3-UPDOWN: Interface Serial0, changed state to up
A(config-if)#exit
%LINK-3-UPDOWN: Interface Serial0, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0, changed state to down
A(config)#router ospf 100
A(config-router)#net 192.168.10.0 0.0.0.255 area 0
A(config-router)#net 202.110.100.1 0.0.0.0 area 0
%LINK-3-UPDOWN: Interface Serial0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0, changed state to up
A#
A#show ip ro
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
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, * - candidate default
U - per-user static route
Gateway of last resort is not set
C 192.168.10.0 is directly connected, Ethernet0
C 202.110.100.0 is directly connected, Serial0
O 192.168.20.0 [110/64] via 192.168.20.1, 00:02:10, Serial0
在路由器B上的操作:
Router>
Router>
Router>en
Router#config t
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#host B
B(config)#int e0
B(config-if)#ip addr 192.168.20.1 255.255.255.0
B(config-if)#no shut
%LINK-3-UPDOWN: Interface Ethernet0, changed state to up
B(config-if)#int s0
B(config-if)#ip addr 202.110.100.2 255.255.255.0
B(config-if)#encap hdlc
B(config-if)#no shut
%LINK-3-UPDOWN: Interface Serial0, changed state to up
B(config-if)#exit
B(config)#router ospf 100
B(config-router)#net 192.168.20.0 0.0.0.255 area 0
B(config-router)#net 202.110.100.2 0.0.0.0 area 0
B#
B#show ip ro
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
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, * - candidate default
U - per-user static route
Gateway of last resort is not set
C 192.168.20.0 is directly connected, Ethernet0
C 202.110.100.0 is directly connected, Serial0
O 192.168.10.0 [110/64] via 192.168.10.1, 00:04:36, Serial0
本文转自shenleigang 51CTO博客，原文链接：http://blog.51cto.com/shenleigang/148790，如需转载请自行联系原作者
