第一步：配置接入层交换机，创建vlan,接口加入vlansw1(config)#vlan10sw1(config-vlan)#vlan20sw1(congig-vlan)#exitsw1(config)#interfacef0/1sw1(config-if)#switchportmodeaccess//设置接口模式为accesssw1(config-if)#switchportaccessvlan10//接口加入vlan10sw1(config-if)#interfacef0/2sw1(config-if)#switchportmodeaccesssw1(config-if)#switchportaccessvlan10sw2(config)#vlan10sw2(config-vlan)#vlan20sw2(congig-vlan)#exitsw2(config)#interfacef0/1sw2(config-if)#switchportmodeaccesssw2(config-if)#switchportaccessvlan20sw2(config-if)#interfacef0/2sw2(config-if)#switchportmodeaccesssw2(config-if)#switchportaccessvlan20第二步：配置核心交换机，创建vlan，配置trunk, 配置vlan虚接口，开启IP路由功能hx-1(config)#vlan10//创建vlanhx-1(config-vlan)#vlan20hx-1(config-vlan)#exithx-1(config)#interfacerangeg1/0/1-2//批量设置多个接口hx-1(config-if)#switchporttrunkencapsulationdot1q//做dot1q封装hx-1(config-if)#switchportmodetrunk//设置trunk模式hx-1(config-if)#switchportallowedvlanall  (默认就允许所有vlan通过）hx-1(config-if)#interfacevlan10hx-1(config-if)#ipaddress192.168.10.254255.255.255.0hx-1(config-if)#interfacevlan20hx-1(config-if)#ipaddress192.168.20.254255.255.255.0hx-1(config-if)#iprouting//在三层交换机中开启ip路由功能第三步：配置核心交换机，创建dhcp地址池，配置网关，dnshx-1(config)#ipdhcppoolvlan10hx-1(dhcp-config)#network192.168.10.0255.255.255.0hx-1(dhcp-config)#default-router192.168.10.254hx-1(dhcp-config)#dns-server8.8.8.8hx-1(config)#ipdhcppoolvlan20hx-1(dhcp-config)#network192.168.20.0255.255.255.0hx-1(dhcp-config)#default-router192.168.20.254hx-1(dhcp-config)#dns-server8.8.8.8第四步：验证结果PC验证是否可以通过DHCP获取IP地址PC1pingPC3