Host with same IP of default gateway. How to prevent?

Hi,
I had a problem this week in the network. A host was plugged in the network with the same IP address of the default gateway of that Vlan.
Is there someway to prevent it? I know with 802.11x I could know who is doing that, but it would not avoid the problem to occur.
Is there anyway to force the hosts to use DHCP or something?

Hey there. You want to look at DHCP snooping ;-) Make sure you have a DHCP server configured, and DHCP snooping enabled on your switch. If a device tries to use any static assigned IP addresses, the switch interface will block it (it must be DHCP assigned). For your router interface, make sure you trust the interface (as you will have a static IP address assigned).
Hope this helps, good luck
Dazzler

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