vlan间的通信1：单臂路由

1. 拓扑：

   

PC1:

PC2:

2. 交换机LSW1：（创建vlan 10，20省略）

[switch-Ethernet0/0/1] port link-type access 
//定义接口类型为access 
[switch-Ethernet0/0/1] port default vlan 10 
//把接口的vlan设为10，也可以在创建vlan10的时候加入，命名与此处不同 
[switch-Ethernet0/0/1] interface E0/0/3
[switch-Ethernet0/0/3] port link-type access 
[switch-Ethernet0/0/3] port default vlan 20 
[switch-Ethernet0/0/3]int E0/0/2 
[switch-Ethernet0/0/2] interface Ethernet0/0/2 
[switch-Ethernet0/0/2] port link-type trunk 
[switch-Ethernet0/0/2] port trunk allow-pass vlan 10 20 
//设置trunk的通过的vlan包
           

1. 路由器：

[router] interface GigabitEthernet0/0/0.10     //进入G0/0/0的子接口0.10
[router-GigabitEthernet0/0/0.10] dot1q termination vid 10
//用来把包解封装去掉标签和打上标签，dot1q：vlan封装协议
[router-GigabitEthernet0/0/0.10] ip address 192.168.1.254 24
//24是子网掩码<=>255.255.255.0
[router-GigabitEthernet0/0/0.10] arp broadcast enable
//开启arp广播功能，华为路由器默认关闭，不打开，通信会出现问题
[router-GigabitEthernet0/0/0.10] interface GigabitEthernet0/0/0.20
//进入vlan20的子接口G0/0/0.20同0.10一样
[router-GigabitEthernet0/0/0.10] dot1q termination vid 20
[router-GigabitEthernet0/0/0.10] ip address 192.168.2.254 24
[router-GigabitEthernet0/0/0.10] arp broadcast enable