How to remove a router from DHCP, without access to it?

Question

Mikrotik

Good afternoon!
the essence is this: in the local network there is DHCP enabled on the router, which interferes because it distributes ip to devices.
How can I weed it out in Mikrotik so that it doesn’t go into the local area, but so that it has the Internet on it?

Answer 1

DHCP works within the L2 domain. It must be moved to a separate L2 domain, either physically or using vlan.

Answer 2

Option (1): on Mikrotik, throw out the port that goes to that router from the bridge, i.e. allocate the area between Mikrotik and that router into a separate network segment with separate addressing; configure routing on Mikrotik.
Difficulty: because the address and mask on that router cannot be touched, then instead you would have to change the addressing in the main mikrotik local network; this may not be very convenient.
Therefore, here is option (2): https://www.google.com/search?q=dhcp+snooping+mikrotik