三层配置命令

1. 配置三层交换机启动路由功能：ip routing 

2. 配置VLAN IP地址：interface vlan vlan-id
                                  Ip address ip-address subnet-mask
                                  No shutdown

3. 配置接口为三层模式：no switchport 

4. 配置DHCP中继转发：int vlan vlan-id

                                      Ip helper-address Dhcpserver-address 

5. 配置静态路由：ip route targetnet-address netmask nexthop-address 

6. 配置RIP协议：router rip

7. 查看FIB表：show ip cef 

8. 查看邻接关系表：show adjacency detail 

9. 查看路由表：show ip route