problem with mt :(

I am presenting my problem:
Customers ap set as a client. The client is connected to the PC through an ethernet cable on which network card there is a fixed IP address, but left dhcp. After having the pppoe card network always seeks an IP address (which obviously is not).
How do I prevent this happening?

I’m sorry I’m not able to understand the problem. Probably you can give more clear explanation, where is the problem.

How do I stop ip request by the network card of my customers?

please describe the issue in more detail, or include a picture.