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Cisco三層vlan與路由配置

cisco三層路由

要求整個網絡可以訪問互聯網,使用NAT轉換

2017630

14:13

技術分享

1、用Internet路由器模仿公網路由,配置如下

Router>enable

Router#config t

Enter configurationcommands, one per line. End with CNTL/Z.

Router(config)#inters1/0

Router(config-if)#ipadd 1.1.1.1 255.255.255.0

Router(config-if)#clockrate 6400

Router(config-if)#noshutdown

模擬公網路由器配置完成

2、配置企業路由器

配置連接公網的接口IP地址把接口定義為outside

Router>enable

Router#config t

Enter configurationcommands, one per line. End with CNTL/Z.

Router(config)#inters1/1

Router(config-if)#ipadd 1.1.1.2 255.255.255.0

Router(config-if)#noshutdown

Router(config-if)#

%LINK-5-CHANGED:Interface Serial1/1, changed state to up

%LINEPROTO-5-UPDOWN:Line protocol on Interface Serial1/1, changed state to up

Router(config-if)#ip nat outside

配置連接三層交換機接口IP地址把接口定義為inside

Router(config)#interf0/0

Router(config-if)#ipadd 172.16.1.2 255.255.255.0

Router(config-if)#noshutdown

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

Router(config-if)#ip nat inside

配置acl訪問控制列表,不配置無法訪問通過路由訪問公網(這裏特別重要)如果不把所有要

允許訪問公網的網段配置成允許訪問的狀態,路由器就會阻止這些網段訪問公網

Router(config)#access-list10 permit 192.168.1.0 0.0.0.255

Router(config)#access-list10 permit 192.168.2.0 0.0.0.255

Router(config)#access-list10 permit 192.168.3.0 0.0.0.255

配置NAT地址轉換

Router(config)#ip natinside source list 10 interface s1/1 overload

3、配置三層交換機

創建一個vlan5用來配置與路由連接的地址,並把f0/1劃入vlan5

Switch(config)#vlan 5

Switch(config)#interf0/1

Switch(config-if)#swit

Switch(config-if)#switchportmo

Switch(config-if)#switchportmode acc

Switch(config-if)#switchportmode access

Switch(config-if)#swac

Switch(config-if)#swaccess vlan 5

配置vlan地址

Switch(config-if)#intervlan 5

Switch(config-if)#

%LINK-5-CHANGED:Interface Vlan5, changed state to up

%LINEPROTO-5-UPDOWN:Line protocol on Interface Vlan5, changed state to up

Switch(config-if)#ipadd 172.16.1.1 255.255.255.0

Switch(config-if)#noshutdown

把其它vlan也配置好

配置Vlan2

Switch(config)#interf0/2

Switch(config-if)#swmo acc

Switch(config-if)#swacc vlan 2

Switch(config-if)#intervlan 2

Switch(config-if)#

%LINK-5-CHANGED:Interface Vlan2, changed state to up

%LINEPROTO-5-UPDOWN:Line protocol on Interface Vlan2, changed state to up

Switch(config-if)#ipadd 192.168.1.254 255.255.255.0

Switch(config-if)#noshut

Switch(config-if)#

配置Vlan3

Switch(config-if)#noshut

Switch(config-if)#interf0/3

Switch(config-if)#swmo acc

Switch(config-if)#swacc vlan 3

Switch(config-if)#intervlan 3

Switch(config-if)#

%LINK-5-CHANGED:Interface Vlan3, changed state to up

%LINEPROTO-5-UPDOWN:Line protocol on Interface Vlan3, changed state to up

Switch(config-if)#ipadd 192.168.2.254 255.255.255.0

配置Vlan4

Switch(config-if)#interf0/4

Switch(config-if)#swmo acc

Switch(config-if)#swacc vlan 4

Switch(config-if)#intervlan 4

Switch(config-if)#

%LINK-5-CHANGED:Interface Vlan4, changed state to up

%LINEPROTO-5-UPDOWN:Line protocol on Interface Vlan4, changed state to up

Switch(config-if)#ipadd 192.168.3.254 255.255.255.0

配置DHCP服務器

配置vlan2DHCP服務器

Switch(config)#ipdhcp pool vlan2

Switch(dhcp-config)#default-router192.168.1.254

Switch(dhcp-config)#dns-server1.1.1.1

Switch(dhcp-config)#network192.168.1.0 255.255.255.0

Switch(dhcp-config)#exit

配置vlan3DHCP服務器

Switch(config)#ipdhcp pool vlan3

Switch(dhcp-config)#default-router192.168.2.254

Switch(dhcp-config)#dns-server2.2.2.2

Switch(dhcp-config)#network192.168.2.0 255.255.255.0

Switch(dhcp-config)#exit

配置vlan4DHCP服務器

Switch(config)#ipdhcp pool vlan4

Switch(dhcp-config)#default-router192.168.3.254

Switch(dhcp-config)#dns-server3.3.3.3

Switch(dhcp-config)#network192.168.3.0 255.255.255.0

Switch(dhcp-config)#exit

開啟三層交換機路由功能

ip routing

到這裏所有的vlan間的電腦已經能夠相互ping通了,但是還是不能訪問互聯網,因為路由還沒有

配置完成


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Cisco三層vlan與路由配置