IP terminal conflict - Mobile phones

Hello Everybody
I see when a user walk around between Access Points, I get a error message for 2-3min IP terminal conflict, then it disappears. How can I resolve this problem? Roaming is set to 40% on all Access Points, DHCP lease set to 2 days

Dear Sir,
I hope this email finds you well.

I am glad to receive your message. Can you take a screenshot of this message and send it to me? This will help me understand the problem more intuitively.


I wish you a happy life!
Best regards,
Eric

Eric- replied at 2025-4-17 16:52
Dear Sir,
I hope this email finds you well.

IP conflict 192.168.2.70 on device Gi26. Cause: MAC 105f.0247.b292, SN: G1T80VS001652;MAC 805e.c0bb.ed06, the source of conflict may go through the switch and port: Port G1T80VS001652 of the switch Gi26ort G1T80VS001669 of the switch Gi18ort G1T80VS005406 of the switch Gi28.

IP conflict 192.168.2.81 on multiple devices: MAC 105f.0266.345f, SN: G1T906G004885;MAC 805e.0c6d.95f4, the source of conflict may go through the switch and port: Port G1T80VS001652 of the switch Gi11

IP conflict 192.168.2.76 on multiple devices: MAC 805e.c0bb.f4ae, the source of conflict may go through the switch and port: Port G1T80VS001652 of the switch Gi26ort G1T80VS001669 of the switch Gi22ort G1T80VS005406 of the switch Gi28;MAC 105f.0241.3c14, SN: G1T801M00115C

Jacques Rossouw replied at 2025-4-17 19:56
Eric- replied at 2025-4-17 16:52
Dear Sir,
I hope this email finds you well.

Question do I need to make my network switches static IP's

Jacques Rossouw replied at 2025-4-17 20:19
Question do I need to make my network switches static IP's

Thank you for your reply, sir. Have you checked which device the address 192.168.2.70 belongs to? Is there any user who manually changed the terminal to this address, causing a conflict? In addition, we can also check whether there is a conflict in the address pool configuration.

Eric- replied at 2025-4-18 13:48
Thank you for your reply, sir. Have you checked which device the address 192.168.2.70 belongs to?  ...

All the network switches and network VOIP Phones, notebooks, computers, other devices set to DHCP. At this client they have a lot of power problems so every night the power goes off for entire building and all the network equipment + gateway router. Then every morning everything switch back on. This create IP conflict problems. What I don't understand shouldnt the Gateway router be smart enough not to make mistakes with IP's?
So what I did what change all the Network switches to static IP's