How to get 2 and more dhcp address from ISP to one interface

Hi all,

my ISP is offering 4 dynamic public IP, assigned by DHCP based on MAC address.
Is somehow possible get it working? DHCP client can be assigned only once per interface, I’ve only one interface from modem (which is just bridging connection).

I found only 2 options, but it’s not so nice…

  1. put switch between modem and mikrotik and use more interfaces as WAN
  2. setup metarouter

Option 2) is better from my point of view.

Thanks for help

I have 5 public dhcp IPs from my ISP, my modem goes to a switch, then feeds 2 rouberboard 133s.
For a test I used 2 of the NICs on one RB133, assigned each a dhcp client and got separate IPs on that router.