Why can I not use static ip_

RouterOS Beginner Basics
2

Starting from the default configuration, there are a few things to do in order to set your static IP:

  1. Disable the DHCP client on ether1
  2. Add the IP configuration under IP → Address to port ether1
  3. Add a static route to 0.0.0.0/0 through the gateway, provided by the ISP (IP-> Routes)
  4. Add static DNS server under IP → DNS

The rest of the configuration (interface lists, masquerade, bridge configuration, etc) is already included in the default script.