单臂路由实现不同vlan之间的通信
Cisco 模拟为例
1.在电脑里搭建一个模拟拓扑图
如下图所示
图1
一个路由器，三个交换机，再来四台主机，型号随便选，自己的习惯。
接线的话可以自动连接，也可以自己手动连接，连线口诀：相同设备用交叉线，异同设备用直连线
2.搭建好后就是设置问题了
2.1 第一台主机的设置：
设计主机0位为vlan100 IP 192.168.1.10 ， 子网掩码以及网关
接着设计第二台、第三台和第四台pc
2.2交换机的配置
双击进入交换机0
Switch>enable
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 100 name it
VLAN 100 added:
Name: it
Switch(vlan)#vlan 200 name cw
VLAN 200 added:
Name: cw
Switch(vlan)#exit
APPLY completed.
Exiting....
Switch#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#interface fastEthernet 0/1
Switch(config-if)#switchport mode access
Switch(config-if)#switchport access vlan 100
Switch(config-if)#exit
Switch(config)#interface fastEthernet 0/2
Switch(config-if)#switchport mode access
Switch(config-if)#switchport access vlan 200
Switch(config-if)#exit
Switch(config)#interface fastEthernet 0/24
Switch(config-if)#switchport mode trunk
Switch(config-if)#switchport trunk allowed vlan all
Switch(config-if)#end
Switch#write
Building configuration...
设置成功后可查看当前的设置看是否设置正确。
交换机1同理
接着设计交换机2
Switch>enable
Switch#configure term
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#interface range fastEthernet 0/1-2
Switch(config-if-range)#switchport mode trunk
Switch(config-if-range)#switchport trunk allowed vlan all
Switch(config-if-range)#end
Switch#vlan data
Switch#vlan database
Switch(vlan)#vlan 100
VLAN 100 added:
Name: VLAN0100
Switch(vlan)#vlan 200
VLAN 200 added:
Name: VLAN0200
Switch(vlan)#exit
Switch>enable
Switch#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Switch(config)#interface fastEthernet 0/3
Switch(config-if)#switchport mode trunk
Switch(config-if)#
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/3, changed state to down
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/3, changed state to up
Switch(config-if)#switchport trunk allowed vlan all
Switch(config-if)#exit
Switch(config)#end
Switch#write
最后设置路由器0
Router>
Router>enable
Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.
Router(config)#interface fastEthernet 0/0
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)#interface fastEthernet 0/0.1
Router(config-subif)#
%LINK-5-CHANGED: Interface FastEthernet0/0.1, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0.1, changed state to up
Router(config-subif)#en
Router(config-subif)#encapsulation ?
dot1Q IEEE 802.1Q Virtual LAN
Router(config-subif)#encapsulation
% Incomplete command.
Router(config-subif)#encapsulation dot1Q 100
Router(config-subif)#ip address 192.168.1.254 255.255.255.0
Router(config-subif)#no shutdown
Router(config-subif)#exit
Router(config)#interface fastEthernet 0/0.2
Router(config-subif)#
%LINK-5-CHANGED: Interface FastEthernet0/0.2, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface FastEthernet0/0.2, changed state to up
Router(config-subif)#encapsulation dot1Q 200
Router(config-subif)#ip address 192.168.2.254 255.255.255.0
Router(config-subif)#no shut
Router(config-subif)#no shutdown
Router(config-subif)#exit
Router(config)#end
Router#
%SYS-5-CONFIG_I: Configured from console by console
Router#show ip route
Codes: C - connected, S - static, I - IGRP, R - RIP, M - mobile, B - BGP
D - EIGRP, EX - EIGRP external, O - OSPF, IA - OSPF inter area
N1 - OSPF NSSA external type 1, N2 - OSPF NSSA external type 2
E1 - OSPF external type 1, E2 - OSPF external type 2, E - EGP
i - IS-IS, L1 - IS-IS level-1, L2 - IS-IS level-2, ia - IS-IS inter area
* - candidate default, U - per-user static route, o - ODR
P - periodic downloaded static route
Gateway of last resort is not set
C 192.168.1.0/24 is directly connected, FastEthernet0/0.1
C 192.168.2.0/24 is directly connected, FastEthernet0/0.2
Router#write
配置完成后，我们可以进行发包试试
最后实现不同vlan发包。