实验预告：通过配置，使得部门部门间和部门与外部网络能够互相通信，笔记本电脑能够获取到DHCP自动分配的IP地址、子网掩码、默认网关、DNS，并且能访问到DNS服务器的HTTP网页。
该项目所使用的到的网络技术有：VLAN划分、NAT转换、路由RIP、三层交换机的路由功能、无线AP技术、DNS服务、HTTP服务。
三层交换机S1的配置：
S1>en
S1#conf t
S1(config)#vlan 100
S1(config-vlan)#vlan 200
S1(config-vlan)#vlan 300
S1(config-vlan)#exit
S1(config)#inter f0/1
S1(config-if)#no sw
S1(config-if)#ip add 34.1.2.2 255.255.255.0
S1(config-if)#no shut
S1(config-if)#exit
S1(config)#inter f0/20
S1(config-if)#sw ac vlan 300
S1(config-if)#exit
S1(config)#inter f0/24
S1(config-if)#sw tr enc dot
S1(config-if)#sw mo tr
S1(config-if)#sw tr allowed vlan 100,200
S1(config-if)#exit
S1(config)#inter f0/23
S1(config-if)#sw tr enc dot
S1(config-if)#sw mo tr
S1(config-if)#sw tr allowed vlan 100,200
S1(config-if)#exit
S1(config)#inter vlan 100
S1(config-if)#ip add 192.34.1.254 255.255.255.0
S1(config-if)#no shut
S1(config-if)#exit
S1(config)#inter vlan 200
S1(config-if)#ip add 192.34.2.254 255.255.255.0
S1(config-if)#no shut
S1(config-if)#exit
S1(config)#inter vlan 300
S1(config-if)#ip add 192.34.3.254 255.255.255.0
S1(config-if)#no shut
S1(config-if)#exit
S1(config)#ip dhcp pool 300
S1(dhcp-config)#network 192.34.3.0 255.255.255.0
S1(dhcp-config)#default-router 192.34.3.254
S1(dhcp-config)#dns-server 34.34.1.1
S1(dhcp-config)#exit
S1(config)#ip routing
S1(config)#router rip
S1(config-router)#version 2
S1(config-router)#network 192.34.1.0
S1(config-router)#network 192.34.2.0
S1(config-router)#network 192.34.3.0
S1(config-router)#network 34.1.2.0
S1(config-router)#no auto-summary
S1(config-router)#exit
二层交换机S2的配置：
S2#conf t
S2(config)#vlan 100
S2(config-vlan)#vlan 200
S2(config-vlan)#exit
S2(config)#inter f0/1
S2(config-if)#sw ac vlan 100
S2(config-if)#exit
S2(config)#inter f0/2
S2(config-if)#sw ac vlan 200
S2(config-if)#exit
S2(config)#inter f0/24
S2(config-if)#sw mo tr
S2(config-if)#exit
二层交换机S3的配置：
S3#conf t
S3(config)#vlan 100
S3(config-vlan)#vlan 200
S3(config-vlan)#exit
S3(config)#inter f0/1
S3(config-if)#sw ac vlan 100
S3(config-if)#exit
S3(config)#inter f0/2
S3(config-if)#sw ac vlan 200
S3(config-if)#exit
S3(config)#inter f0/23
S3(config-if)#sw mo tr
S3(config-if)#exit
路由器R1的配置：
R1>en
R1#conf t
R1(config)#inter f0/0
R1(config-if)#ip add 34.34.1.254 255.255.255.0
R1(config-if)#no shut
R1(config-if)#exit
R1(config)#inter s0/3/0
R1(config-if)#ip add 34.1.1.1 255.255.255.0
R1(config-if)#no shut
R1(config-if)#exit
R1(config)#router rip
R1(config-router)#version 2
R1(config-router)#network 34.1.1.0
R1(config-router)#network 34.34.1.0
R1(config-router)#no auto-summary
路由器R2的配置：
R2>en
R2#conf t
R2(config)#inter f0/0
R2(config-if)#ip add 34.34.2.254 255.255.255.0
R2(config-if)#no shut
R2(config-if)#ip nat inside
R2(config-if)#exit
R2(config)#inter f0/1
R2(config-if)#ip add 34.1.2.1 255.255.255.0
R2(config-if)#no shut
R2(config-if)#ip nat inside
R2(config-if)#exit
R2(config)#inter s0/3/0
R2(config-if)#ip add 34.1.1.2 255.255.255.0
R2(config-if)#no shut
R2(config-if)#ip nat outside
R2(config-if)#exit
R2(config)#ip route 0.0.0.0 0.0.0.0 34.1.1.1
R2(config)#router rip
R2(config-router)#version 2
R2(config-router)#network 34.1.1.0
R2(config-router)#network 34.1.2.0
R2(config-router)#network 34.34.2.0
R2(config-router)#no auto-summary
R2(config-router)#default-information originate
R2(config-router)#ip access-list extended NAT
R2(config-ext-nacl)#permit ip any any
R2(config-ext-nacl)#ip nat inside source list NAT inter s0/3/0 overload
R2(config)#
检验：部门-1某台计算机与部门-2和部门-3通信以及与外部网络通信。
Packet Tracer PC Command Line 1.0
C:\>ping 192.34.2.1 <--与部门-2通信
Pinging 192.34.2.1 with 32 bytes of data:
Reply from 192.34.2.1: bytes=32 time=1ms TTL=127
Reply from 192.34.2.1: bytes=32 time=2ms TTL=127
Reply from 192.34.2.1: bytes=32 time<1ms TTL=127
Reply from 192.34.2.1: bytes=32 time<1ms TTL=127
Ping statistics for 192.34.2.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 2ms, Average = 0ms
C:\>ping 192.34.1.2 <--与部门-3通信
Pinging 192.34.1.2 with 32 bytes of data:
Reply from 192.34.1.2: bytes=32 time=1ms TTL=128
Reply from 192.34.1.2: bytes=32 time=1ms TTL=128
Reply from 192.34.1.2: bytes=32 time<1ms TTL=128
Reply from 192.34.1.2: bytes=32 time=1ms TTL=128
Ping statistics for 192.34.1.2:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 1ms, Average = 0ms
C:\>ping 34.34.1.1 <--与DNS-server服务器通信
Pinging 34.34.1.1 with 32 bytes of data:
Reply from 34.34.1.1: bytes=32 time=2ms TTL=125
Reply from 34.34.1.1: bytes=32 time=3ms TTL=125
Reply from 34.34.1.1: bytes=32 time=1ms TTL=125
Reply from 34.34.1.1: bytes=32 time=2ms TTL=125
Ping statistics for 34.34.1.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 1ms, Maximum = 3ms, Average = 2ms
C:\>ping 34.34.2.1 <--与server-2服务器通信
Pinging 34.34.2.1 with 32 bytes of data:
Reply from 34.34.2.1: bytes=32 time<1ms TTL=126
Reply from 34.34.2.1: bytes=32 time<1ms TTL=126
Reply from 34.34.2.1: bytes=32 time<1ms TTL=126
Reply from 34.34.2.1: bytes=32 time=1ms TTL=126
Ping statistics for 34.34.2.1:
Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
Minimum = 0ms, Maximum = 1ms, Average = 0ms
C:\>
给无线AP添加SSID：thrfur，并添加WEP认证，KEY为1234567890
笔记本电脑输入SSID和KEY，即可自动连接无线WIFI
查看笔记本电脑自动获取到的IP地址：
下面在笔记本电脑-1上尝试访问HTTP服务。
