Static root and default route

静态路由配置1

 

设置PC机ip,网关,开启接口,设置静态路由（目标网段+子网掩码+下一跳地址）

以Router1为例

Router>

Router>enable

Router#configure terminal

Router(config)#int f0/0

Router(config-if)#ip address 192.168.1.3 255.255.255.0

Router(config-if)#no shutdown

Router(config-if)#exit

Router(config)#int f0/1

Router(config-if)#ip address 192.168.2.1 255.255.255.0      （设置两个接口的ip地址）

Router(config-if)#no shutdown

Router(config-if)#exit

Router(config)#ip route 192.168.3.0 255.255.255.0 192.168.2.2

Router(config)#ip route 192.168.4.0 255.255.255.0 192.168.2.2（下一跳到达3.0与4.0网段）

Router(config)#

其他两个路由器同理

此拓扑图中，将三个路由器全部设置为静态路由或者两边两个设置为默认路由，中间位置设置为静态路由。

设置默认路由方法

Router(config)#ip route0.0.0.0 0.0.0.0 下一跳地址

Router#show ip route

 

静态路由配置2

 

设置PC机ip,网关,设置router的ip并开启其接口,设置静态路由（目标网段+子网掩码+下一跳地址）以及默认路由（0.0.0.0 0.0.0.0 下一跳地址）

1、4号router 设置为default route   (默认路由)

2、3号router 设置为 static route    (静态路由)

1号router设置过程

Router>

Router>enable

Router#configure terminal

Router(config)#int f0/0

Router(config-if)#ip address 192.168.1.3 255.255.255.0

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 FastEthernet0/1, changed state to up

Router(config-if)#exit

Router(config)#int f0/1

Router(config-if)#ip address 192.168.2.1 255.255.255.0

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 FastEthernet0/1, changed state to up

Router(config-if)#exit

Router(config)#ip route 0.0.0.0.0 0.0.0.0 192.168.2.2

Router(config)#

4号router类比1号

3号router设置如下

Router>en

Router#configure  terminal

Router(config)#int f0/0

Router(config-if)#ip address 192.168.3.2 255.255.255.0

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

Router(config-if)#exit

Router(config)#int f0/1

Router(config-if)#ip address 192.168.4.1 255.255.255.0

Router(config-if)#no shutdown

Router(config-if)#

%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up

%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/1, changed state to up

Router(config-if)#exit

Router(config)#ip route 192.168.5.0 255.255.255.0 192.168.4.2

Router(config)#ip route 192.168.2.0 255.255.255.0 192.168.3.1

Router(config)#ip route 192.168.1.0 255.255.255.0 192.168.3.1

Router(config)#exit

Router#

Router#show ip route

Gateway of last resort is not set

S    192.168.1.0/24 [1/0] via 192.168.3.1

S    192.168.2.0/24 [1/0] via 192.168.3.1

C    192.168.3.0/24 is directly connected, FastEthernet0/0

C    192.168.4.0/24 is directly connected, FastEthernet0/1  (直连）

S    192.168.5.0/24 [1/0] via 192.168.4.2   （静态）

2号router设置类比3号