L2TP and so about DHCP

Question

I setup local network. I have 1 router and 2 devices, for sample. I setup L2TP server on the router and successfully connect devices to it.

ROUTER - 172.16.200.1
1 DEVICE - 172.16.200.2
2 DEVICE - 172.16.200.3

If i shutdown devices and boot 2 device firstly, and next 1 device. i see:

ROUTER - 172.16.200.1
1 DEVICE - 172.16.200.3
2 DEVICE - 172.16.200.2

I want, that router remember MAC <-> Internal IP. What should i do ?

Answer 1

Point-to-Point networks can't do it. We should use another protocol for this quest(for example OpenVPN)