实验名称：简单的DHCP 分配，加子网划分实验

实验拓扑：实验要求：给定了192.168.100.0/24 网段， 划分位4个子网，分配给vlan 10~40。所有pc机都能获取到ip地址、网关、dns地址。租期为3天。

实验步骤：

1、计算子网，将192.168.100.0/24 划分为4个网段，分别为：网段：192.168.100.0/26 网关： 192.168.100.62网段： 192.168.100.64/26 网关： 192.168.100.126网段： 192.168.100.128/26 网关： 192.168.100.190网段： 192.168.100.192/26 网关： 192.168.100.254子网掩码为：255.255.255.192

2、

#配置交换机SW1 ：

vlan batch 10 20 30 40 interface e0/0/1port link-type access port de vlan 10interface e0/0/2port link-type access port de vlan 20interface e0/0/3port link-type access port de vlan 30interface e0/0/4port link-type access port de vlan 40interface g0/0/1port link-type trunkport trunk a vlan 10 20 30 40

3、   #配置交换机sw2（与sw1配置完全相同）    vlan batch 10 20 30 40 interface e0/0/1  port link-type access   port de vlan 10interface e0/0/2  port link-type access   port de vlan 20interface e0/0/3  port link-type access   port de vlan 30interface e0/0/4  port link-type access   port de vlan 40

interface g0/0/1

port link-type trunkport trunk a vlan 10 20 30 40

4、  #配置作为DHCP服务器的SW3 ： vlan batch 10 20 30 40 dhcp enable             /开启DHCP服务  ip pool vlan-10            network 192.168.100.0 mask 255.255.255.192     gateway-list 192.168.100.62     dns-list 8.8.8.8     lease day 3 ip pool vlan-20     network 192.168.100.64 mask 255.255.255.192     gateway-list 192.168.100.126     dns-list 8.8.8.8     lease day 3 ip pool vlan-30     network 192.168.100.128 mask 255.255.255.192     gateway-list 192.168.190.126     dns-list 8.8.8.8     lease day 3 ip pool vlan-40     network 192.168.100.192 mask 255.255.255.192     gateway-list 192.168.100.254     dns-list 8.8.8.8     lease day 3         /配置4个vlan 网段的地址池 interface vlan 10    ip address 192.168.100.62 255.255.255.192    dhcp select globalinterface vlan 20     ip address 192.168.100.126 255.255.255.192   dhcp select globalinterface vlan 30   ip address 192.168.100.190 255.255.255.192  dhcp select globalinterface vlan 40   ip address 192.168.100.254 255.255.255.192   dhcp select global     /配置4个网关，并指定dhcp服务器port-group 1 group-member g0/0/1 g0/0/2  port link-type trunk  port trunk a vlan 10 20 30 40    /配置连接sw1和sw2的端口        验证：        获取到了IP        ![](https://s1.51cto.com/images/blog/201812/03/8e76a6f6975c17369e087859f830ef27.png?x-oss-process=image/watermark,size_16,text_QDUxQ1RP5Y2a5a6i,color_FFFFFF,t_100,g_se,x_10,y_10,shadow_90,type_ZmFuZ3poZW5naGVpdGk=)