试验拓扑 环境:dhcp server和客户端处于不同网段的情况 dhcp server的配置 no ip routing ip dhcp pool vlan27 network 172.28.27.0 255.255.255.0 default-router 172.28.27.254 dns-server 172.28.28.15 172.28.28.16 ip default-gateway 172.28.28.254 L3-switch的配置 interface Vlan27 ip dh