MAC Reservations mirotik

1. Connect the laptop to your network and get an IP from DHCP as usual.
2. Go into the Mikrotik's IP > DHCP-Server menu and click on the leases display.
3. Scroll through the leases and find your laptop's lease and double-click it
4. In the window that opens, there is a button on the right hand side "make static"
5. Click that button and you're done.

https://forum.mikrotik.com/viewtopic.php?t=122914