Hi Friends… I am facing a problem here in my ISP. I have radippool configured in my freeradius 3.0.6 server and some times my customers are receiving Duplicated IP address, Example 1: ================== Customer: login1 IP 186.227.32.1 NAS: 1 Service: pppoe Customer: login2 IP: 186.227.32.1 NAS: 2 Service: pppoe ================== Example 2: ================== Customer: login1 IP 186.227.32.1 NAS: 1 Service: pppoe Customer: login2 IP: 186.227.32.1 NAS: 1 Service: hotspot ================== Example 3: ================== Customer: login1 IP 186.227.32.1 NAS: 1 Service: hotspot Customer: login2 IP: 186.227.32.1 NAS: 2 Service: pppoe ================== This is what i detected …. but i don`t know how to solve that problem. To fix fast… i created a php script that connect in my Mikrotik Routers and look for logins with duplicated IPs and disconnect these customers in case they exist. But i have a delay of 3 minutes between checks, and while they are connected i have a “loop” in my network. Please friends… how can i fix it ? Is there any configuration to be made in radippool configuration ? Thank you friends. Best Regards.