How to prevent private setting of IP address

Configure DHCP SNOOPING +IP Source Guard can effectively prevent private IP addresses：
1) For software versions 10.3 and later, the configuration of DHCP SNOOPING +IP Source Guard is as follows:
Ruijie(config)#ip  dhcp snooping
Ruijie(config)#int  g0/24

Ruijie(config-if-GigabitEthernet  0/24)#ip dhcp snooping trust    //Set up the trusted port of DHCP SNOOPING on the uplink interface

Ruijie(config-if-GigabitEthernet  0/24)#exit
Ruijie(config)#int  rang g0/1 - 23

Ruijie(config-if-range)#ip  verify source port-security                //Enable the IP Source Guard function on the downlink PC port

2) For software versions earlier than 10.3, the configuration of DHCP SNOOPING +IP Source Guard is as follows:

Ruijie(config)#ip  dhcp snooping

Ruijie(config)#int  g0/25

Ruijie(config-if-GigabitEthernet  0/25)#ip dhcp snooping trust     //上Set up the trusted port of DHCP SNOOPING on the uplink interface

Ruijie(config-if-GigabitEthernet  0/25)#exit
Ruijie(config)#int  rang f0/1-24

Ruijie(config-if-range)#ip  dhcp snooping address-bind                //Enable the IP Source Guard function on the downlink PC port