本次实验我所配置的主机位均为1，网络位为3，所以掩码为24， 
 即mask : 255.255.255.0 
 四台PC机IP配置如图所示 
 Swiith0跟Router0之间用0号连接且配置IP为192.168.122.254 
  
 Router0跟Router1用1号连接且Router0 1号口配置IP为172.18.1.1 其他机IP配置参考此图 
  
 Router1 1号口配置IP为172.18.1.254
 
Swiith1跟Router1之间用0号连接且配置IP为10.10.10.254
 
 
 右侧两台PC机Gateway对应 Router1 1号口配置IP为172.18.1.254
 
Router0添加吓一跳地址如下图所示 
 10.10.10.0是右侧目的IP 
 mask为掩码 
 Next Hop 为右侧路由器 Router1 1号口配置IP为172.18.1.254 
 同理设置Router1路由器的吓一跳 
 
 
左侧两台机器的Gateway地址 对应 Router0的1号口配置IP为172.18.1.1 
 

 
对交换机的配置：
 
Switch
 
Switch
 
Switch
 
Switchen
 
Switch
 
Switchen
 
Switch#conf t
 
Enter configuration commands, one per line. End with CNTL/Z.
 
Switch(config)#exit
 
%SYS-5-CONFIG_I: Configured from console by console
 
Switch#vlan d
 
Switch#vlan database
 
% Warning: It is recommended to configure VLAN from config mode,
 
as VLAN database mode is being deprecated. Please consult user
 
documentation for configuring VTP/VLAN in config mode.
 
Switch(vlan)#vlan 2 name a
 
VLAN 2 added:
 
Name: a
 
Switch(vlan)#vlan 3 name b
 
VLAN 3 added:
 
Name: b
 
Switch(vlan)#exit
 
APPLY completed.
 
Exiting....
 
Switch#conf t
 
Enter configuration commands, one per line. End with CNTL/Z.
 
Switch(config)#int vlan 2
 
%LINK-5-CHANGED: Interface Vlan2, changed state to upSwitch(config-if)#
 
Switch(config-if)#no shu
 
Switch(config-if)#int vlan 3
 
%LINK-5-CHANGED: Interface Vlan3, changed state to upSwitch(config-if)#
 
Switch(config-if)#no shu
 
Switch(config-if)#int f0/1
 
Switch(config-if)#sw m ac
 
Switch(config-if)#sw ac vlan 2
 
%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan2, changed state to upSwitch(config-if)#
 
Switch(config-if)#int f0/2
 
Switch(config-if)#sw m ac
 
Switch(config-if)#sw ac vlan 3
 
%LINEPROTO-5-UPDOWN: Line protocol on Interface Vlan3, changed state to upSwitch(config-if)#
 
Switch(config-if)#int f0/3
 
Switch(config-if)#sw m ac
 
Switch(config-if)#sw ac vlan 2
 
Switch(config-if)#int f0/4
 
Switch(config-if)#sw m ac
 
Switch(config-if)#sw ac vlan 3
 
Switch(config-if)#int f0/5
 
Switch(config-if)#no shu
 
Switch(config-if)#sw m ac
 
Switch(config-if)#sw m tr
 
Switch(config-if)#exit
 
Switch(config)#exit
 
%SYS-5-CONFIG_I: Configured from console by console
 
Switch#
 
对路由器的配置：
 
Press RETURN to get started!
 
Router
 
Router
 
Routeren
 
Router#conf t
 
Enter configuration commands, one per line. End with CNTL/Z.
 
Router(config)#int f0/0
 
Router(config-if)#no shu
 
%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)#no ip ad
 
Router(config-if)#no ip address
 
Router(config-if)#int f0/0.1
 
%LINK-5-CHANGED: Interface FastEthernet0/0.1, changed state to up
 
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0.1, changed state to upRouter(config-subif)#
 
Router(config-subif)#en
 
Router(config-subif)#encapsulation d
 
Router(config-subif)#encapsulation dot1Q 2
 
Router(config-subif)#ip ad
 
Router(config-subif)#ip address 192.168.1.1 255.255.255.0
 
Router(config-subif)#int f0/0.2
 
%LINK-5-CHANGED: Interface FastEthernet0/0.2, changed state to up
 
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0.2, changed state to upRouter(config-subif)#
 
Router(config-subif)#en
 
Router(config-subif)#encapsulation d
 
Router(config-subif)#encapsulation dot1Q 3
 
Router(config-subif)#ip ad
 
Router(config-subif)#ip address 192.168.2.1 255.255.255.0
 
Router(config-subif)#exit
 
Router(config)#
 
我是在模拟器上做的，你可以看看这些命令，要是不明白的话再问吧。
 

 
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python网络编程中，Cisco packet tracer 中两个交换机和一个路由器的配置
 
原理图如下所示：
 
 
配置PC6–PC11的ip地址和子网掩码：
 
 
配置路由器的左半部分的ip地址和子网掩码：
 
 
配置路由器的右半部分的ip地址和子网掩码：
 
 
配置PC的网关：
 
 
用PC8 ping PC9:
 
 
实验成功！

 
 
拓扑图如下 （三个交换机 一个路由器 4台pc） 通过单臂路由使得 不同vlan 4台pc 机互通
 
 
 
 
 
 
 
 
 
 
交换机3（最左边），交换机5（最右边）
 
 
Switch>en
 Switch#conf t
 Enter configuration commands, one per line.  End with CNTL/Z.
 Switch(config)#vlan 11
 Switch(config-vlan)#exit
 Switch(config)#vlan 22
 Switch(config-vlan)#exit
 Switch(config)#int fa0/2
 Switch(config-if)#sw access vlan 11
 Switch(config-if)#no shut
 Switch(config-if)#exit
 Switch(config)#int fa0/3
 Switch(config-if)#sw ac vlan 22
 Switch(config-if)#no shut
 Switch(config-if)#exit
 Switch(config)#int fa0/1
 Switch(config-if)#no shut
 Switch(config-if)#sw mo t
 
 
 交换机4（中间）
 
 
Switch>en
 Switch#conf t
 Enter configuration commands, one per line.  End with CNTL/Z.
 
 
Switch(config)#vlan 11
 Switch(config-vlan)#exit
 Switch(config)#vlan 22
 Switch(config-vlan)#exit
 Switch(config)#int fa0/3
 Switch(config-if)#no shut
 Switch(config-if)#exit
 Switch(config)#int fa0/3
 Switch(config-if)#sw mo t
 Switch(config-if)#exit
 Switch(config)#int fa 0/2
 Switch(config-if)#sw mo t
 Switch(config-if)#no shut
 Switch(config-if)#exit
 Switch(config)#
 
 
路由器
 
 
Router>en
 Router#conf t
 Enter configuration commands, one per line.  End with CNTL/Z.
 Router(config)#int fa0/0
 Router(config-if)#no shut
 
 
Router(config-if)#int fa0/0.11
 
 
Router(config-subif)#no shut
 Router(config-subif)#en
 Router(config-subif)#encapsulation dot1q 11
 Router(config-subif)#ip address 192.118.10.1 255.255.255.0
 Router(config-subif)#exit
 Router(config)#int fa0/0.22
 
 
Router(config-subif)#no shut
 Router(config-subif)#en
 Router(config-subif)#encapsulation dot1q 22
 Router(config-subif)#ip address 192.118.20.1 255.255.255.0
 Router(config-subif)#exit
 Router(config)#