# 子网划分

![image-20240829103825275](https://picgo-noriu.oss-cn-beijing.aliyuncs.com/Images/image-20240829103825275.png)

### 一、VLAN

- **SW2**

  ```
  [SW2]vlan batch 10 20
  [SW2]int g0/0/2
  [SW2-GigabitEthernet0/0/2]port link-type access 
  [SW2-GigabitEthernet0/0/2]port default vlan 10
  [SW2-GigabitEthernet0/0/2]int g0/0/3	
  [SW2-GigabitEthernet0/0/3]port link-type access 
  [SW2-GigabitEthernet0/0/3]port default vlan 20
  [SW2-GigabitEthernet0/0/3]int g0/0/1	
  [SW2-GigabitEthernet0/0/1]port link-type trunk 	
  [SW2-GigabitEthernet0/0/1]port trunk allow-pass vlan all
  ```

- **SW3**

  ```
  [SW3]vlan batch 30 40
  [SW3]int g0/0/2   
  [SW3-GigabitEthernet0/0/2]port link-type access   
  [SW3-GigabitEthernet0/0/2]port default vlan 30
  [SW3-GigabitEthernet0/0/2]int g0/0/3  
  [SW3-GigabitEthernet0/0/3]port link-type access     
  [SW3-GigabitEthernet0/0/3]port default vlan 40
  [SW3-GigabitEthernet0/0/3]int g0/0/1   
  [SW3-GigabitEthernet0/0/1]port link-type trunk     
  [SW3-GigabitEthernet0/0/1]port trunk allow-pass vlan all
  ```

### 二、DHCP

- **SW1**

  ```
  [SW1]dhcp enable  
  [SW1]ip pool vlan10   
  [SW1-ip-pool-vlan10]network 192.168.100.0 mask 26
  [SW1-ip-pool-vlan10]gateway-list 192.168.100.62
  [SW1-ip-pool-vlan10]dns-list 223.5.5.5 223.6.6.6
  [SW1-ip-pool-vlan10]ip pool vlan20  
  [SW1-ip-pool-vlan20]network 192.168.100.64 mask 26
  [SW1-ip-pool-vlan20]gateway-list 192.168.100.126
  [SW1-ip-pool-vlan20]dns-list 223.5.5.5 223.6.6.6
  [SW1-ip-pool-vlan20]ip pool vlan30
  [SW1-ip-pool-vlan30]network 192.168.100.128 mask 26
  [SW1-ip-pool-vlan30]gateway-list 192.168.100.190
  [SW1-ip-pool-vlan30]dns-list 223.5.5.5 223.6.6.6
  [SW1-ip-pool-vlan30]ip pool vlan40
  [SW1-ip-pool-vlan40]network 192.168.100.192 mask 26
  [SW1-ip-pool-vlan40]gateway-list 192.168.100.254
  [SW1-ip-pool-vlan40]dns-list 223.5.5.5 223.6.6.6
  [SW1-ip-pool-vlan40]quit   
  [SW1]port-group group-member g0/0/1 g0/0/2
  [SW1-port-group]port link-type trunk 
  [SW1-port-group]port trunk allow-pass vlan all
  [SW1-port-group]quit     
  [SW1]vlan batch 10 20 30 40
  [SW1]int vlan 10
  [SW1-Vlanif10]ip add 192.168.100.62 26
  [SW1-Vlanif10]dhcp select global 
  [SW1-Vlanif10]int vlan 20
  [SW1-Vlanif20]ip add 192.168.100.126 26
  [SW1-Vlanif20]dhcp select global
  [SW1-Vlanif20]int vlan 30
  [SW1-Vlanif30]ip add 192.168.100.190 26
  [SW1-Vlanif30]dhcp select global
  [SW1-Vlanif30]int vlan 40
  [SW1-Vlanif40]ip add 192.168.100.254 26
  [SW1-Vlanif40]dhcp select global
  ```

### 三、测试

- **PC1**

  ```
  PC1>ipconfig
  
  Link local IPv6 address...........: fe80::5689:98ff:fe2c:74ae
  IPv6 address......................: :: / 128
  IPv6 gateway......................: ::
  IPv4 address......................: 192.168.100.61
  Subnet mask.......................: 255.255.255.192
  Gateway...........................: 192.168.100.62
  Physical address..................: 54-89-98-2C-74-AE
  DNS server........................: 223.5.5.5
                                      223.6.6.6
  ```

- **PC2**

  ```
  PC2>ipconfig
  
  Link local IPv6 address...........: fe80::5689:98ff:fe83:1712
  IPv6 address......................: :: / 128
  IPv6 gateway......................: ::
  IPv4 address......................: 192.168.100.125
  Subnet mask.......................: 255.255.255.192
  Gateway...........................: 192.168.100.126
  Physical address..................: 54-89-98-83-17-12
  DNS server........................: 223.5.5.5
                                      223.6.6.6
  ```

- **PC3**

  ```
  PC3>ipconfig
  
  Link local IPv6 address...........: fe80::5689:98ff:fe78:79be
  IPv6 address......................: :: / 128
  IPv6 gateway......................: ::
  IPv4 address......................: 192.168.100.189
  Subnet mask.......................: 255.255.255.192
  Gateway...........................: 192.168.100.190
  Physical address..................: 54-89-98-78-79-BE
  DNS server........................: 223.5.5.5
                                      223.6.6.6
  ```

- **PC4**

  ```
  PC4>ipconfig
  
  Link local IPv6 address...........: fe80::5689:98ff:fe38:46a7
  IPv6 address......................: :: / 128
  IPv6 gateway......................: ::
  IPv4 address......................: 192.168.100.253
  Subnet mask.......................: 255.255.255.192
  Gateway...........................: 192.168.100.254
  Physical address..................: 54-89-98-38-46-A7
  DNS server........................: 223.5.5.5
                                      223.6.6.6
  ```

### 四、子网划分 - 非等分

![image-20240829141107888](https://picgo-noriu.oss-cn-beijing.aliyuncs.com/Images/image-20240829141107888.png)