已补

1，利用静态路由实现网络互通（两个公司互相通信）

完整图：

2，配置路由器

2.1，此时可以看到电脑和路由器之间是红色的，即不可通信，解决：

Router(config)#interface fa0/0
Router(config-if)#no shutdown 
Router(config-if)#
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0, changed state to up

2.2，此时ping本机IP即可正常通信

2.3，分别启用两台路由器的serial 0/0/0接口

Router(config)#interface serial 0/0/0 
Router(config-if)#no shutdown 
Router(config-if)#
%LINK-5-CHANGED: Interface Serial0/0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface Serial0/0/0, changed state to up

2.4，设置路由器的网关

路由器0

Router(config)#interface fa 0/0
Router(config-if)#ip address 192.168.1.1 255.255.255.0 # 设置此IP地址为本网段的网关

路由器1

Router(config)#interface fa0/0
Router(config-if)#ip address 10.1.1.1 255.255.255.0

此时，PC电脑即可与路由器通信

2.5，配置路由表（路由表是表达到达目的地的下一跳地址）

路线0：

Router(config)#ip route 10.1.1.0 255.255.255.0 2.2.2.2

路线1：

Router(config)#ip route 192.168.1.0 255.255.255.0 2.2.2.3

此时，即可相互通信：

PC>ping 10.1.1.5Pinging 10.1.1.5 with 32 bytes of data:Reply from 10.1.1.5: bytes=32 time=11ms TTL=126
Reply from 10.1.1.5: bytes=32 time=8ms TTL=126
Reply from 10.1.1.5: bytes=32 time=3ms TTL=126
Reply from 10.1.1.5: bytes=32 time=7ms TTL=126Ping statistics for 10.1.1.5:Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:Minimum = 3ms, Maximum = 11ms, Average = 7msPC>ping 192.168.1.1Pinging 192.168.1.1 with 32 bytes of data:Reply from 192.168.1.1: bytes=32 time=0ms TTL=255
Reply from 192.168.1.1: bytes=32 time=0ms TTL=255
Reply from 192.168.1.1: bytes=32 time=0ms TTL=255
Reply from 192.168.1.1: bytes=32 time=10ms TTL=255Ping statistics for 192.168.1.1:Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:Minimum = 0ms, Maximum = 10ms, Average = 2msPC>ping 2.2.2.2Pinging 2.2.2.2 with 32 bytes of data:Reply from 2.2.2.2: bytes=32 time=1ms TTL=255
Reply from 2.2.2.2: bytes=32 time=0ms TTL=255
Reply from 2.2.2.2: bytes=32 time=0ms TTL=255
Reply from 2.2.2.2: bytes=32 time=0ms TTL=255Ping statistics for 2.2.2.2:Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:Minimum = 0ms, Maximum = 1ms, Average = 0msPC>ping 2.2.2.3Pinging 2.2.2.3 with 32 bytes of data:Reply from 2.2.2.3: bytes=32 time=6ms TTL=254
Reply from 2.2.2.3: bytes=32 time=3ms TTL=254
Reply from 2.2.2.3: bytes=32 time=17ms TTL=254
Reply from 2.2.2.3: bytes=32 time=3ms TTL=254Ping statistics for 2.2.2.3:Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:Minimum = 3ms, Maximum = 17ms, Average = 7msPC>ping 10.1.1.0Pinging 10.1.1.0 with 32 bytes of data:Reply from 2.2.2.3: bytes=32 time=4ms TTL=254
Reply from 2.2.2.3: bytes=32 time=1ms TTL=254
Reply from 2.2.2.3: bytes=32 time=3ms TTL=254
Reply from 2.2.2.3: bytes=32 time=6ms TTL=254Ping statistics for 10.1.1.0:Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:Minimum = 1ms, Maximum = 6ms, Average = 3msPC>ping 10.1.1.1Pinging 10.1.1.1 with 32 bytes of data:Reply from 10.1.1.1: bytes=32 time=4ms TTL=254
Reply from 10.1.1.1: bytes=32 time=9ms TTL=254
Reply from 10.1.1.1: bytes=32 time=12ms TTL=254
Reply from 10.1.1.1: bytes=32 time=22ms TTL=254Ping statistics for 10.1.1.1:Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:Minimum = 4ms, Maximum = 22ms, Average = 11msPC>ping 10.1.1.5Pinging 10.1.1.5 with 32 bytes of data:Reply from 10.1.1.5: bytes=32 time=2ms TTL=126
Reply from 10.1.1.5: bytes=32 time=3ms TTL=126
Reply from 10.1.1.5: bytes=32 time=1ms TTL=126
Reply from 10.1.1.5: bytes=32 time=12ms TTL=126Ping statistics for 10.1.1.5:Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:Minimum = 1ms, Maximum = 12ms, Average = 4

好！！！