Introduction to common operations of switches/routers

1. create vlan
2. assign port to vlan
3. view vlan
4. delete vlan
5. Configure the gateway, subnet mask, and DHCP relay of the vlan

After using ssh to connect to the management network port of the switch:

1. Create vlan:

 #进入配置状态
 <S100> system-view              #可以简写：sys
 #创建vlan
 [s100]vlan vlan-id
 ## 如果vlan-id不存在则创建该vlan  
 ## 批量创建vlan：
 [s100]vlan batch vlan-id1 to vlan-id2
 [s100]quit                     ##或ctrl + z
 [s100]save
 [s100]quit

2. Assign the port to the vlan:

<S100> system-view
[s100]vlan vlan-id         ##选择vlan 并进入配置状态
[s100]port Gx/y/z          ##G表示光纤网口 x模块号，y层号，z端口号
[s100]quit                     ##或ctrl + z
[s100]save
[s100]quit

3. View vlan:
3.1 View how many vlans there are currently

<S100> system-view
[s100] display vlan     ##可简写dis vlan

3.2 Check how many switch ports there are in a vlan:

[s100] display vlan vlan-id
## 或通过以下命令查配置文件

3.3 View switch port status:

## 查看所有端口
[s100] display interface brief  
## 查看某端口信息
[s100]display interface G0/0/12
## 查看交换机端口mac
[s100]display mac-address
##查看arp表项：
[s100]display arp

4. Delete vlan

## 删除一个vlan
<S100> system-view
[s100] undo vlan vlan-id
## 删除多个vlan
[s100] undo vlan batch vlan-id1 to vlan-id2

*Problems encountered:

[s100]undo vlan 100
Error: The VLAN has a L3 interface. Please delete it first.
##原因为为要删除的vlan配置了ip地址导致，如vlan编号为100：
## 解决：
[s100]display current-configuration
##看到：
       interface Vlanif100                       
       ip address 10.101.1.1 255.255.255.0
       dhcp select relay
       dhcp relay server-ip 192.168.10.203 
##输入
[s100]interface Vlanif 100
[s100-Vlanif100]dis this
##看到以下信息：
       #
       interface Vlanif100
       ip address 10.101.1.1 255.255.255.0
       dhcp select relay
       dhcp relay server-ip 192.168.10.203 
       #
       return
[s100]undo ip address 
[s100]undo dhcp select
[s100]display this
       #
       interface Vlanif100
       #
       return
[s100]undo interface Vlanif 100
[s100]undo vlan 100

5. Configure gateway, subnet mask, dhcp relay for vlan

## 例：
## 创建vlan2 
## 配置网关：192.168.10.1，子网掩码：255.255.255.0
## 配置中继的dhcp-server为：192.168.10.123
<S100> system-view
[s100] vlan 2
[s100-vlan2]interface vlanif 2
[s100-Vlanif2]ip addr 192.168.10.1 255.255.255.0
[s100-Vlanif2]dhcp select relay
[s100-Vlanif2]dhcp relay server-ip 192.168.10.123
[s100-Vlanif2]display this
        #
        interface Vlanif2
         ip address 192.168.10.1 255.255.255.0
         dhcp select relay
         dhcp relay server-ip 192.168.10.123
        #
        return