If you have a public IP block from your ISP and you want to route it to another Router take a look here http://forum.mikrotik.com/t/routing-a-block-of-public-ip-addresses-to-other-mikrotik/138145/3
If you have a public IP block from your ISP and you want to route it to another Router take a look here http://forum.mikrotik.com/t/routing-a-block-of-public-ip-addresses-to-other-mikrotik/138145/3