Multi WAN DHCP routing

Question

I get from my ISP 3 links on 3 separate modems, all in DHCP, but in the same range, so the default gateway is same on all. how can i control which host uses which public IP ?

lferrara · Accepted Answer

AbrahamBuchinger, 
You cannot add/manage multiple gateways if they all have the same ip/subnet. This is something wrong. This will make confusion on routing table. 
Once all the 3 gateways have different ip (talk with you isp ) add all of them as wan zone port with their ip on 3 XG ports and then on firewall rules choose the primary gateway to be used and the outbound address to be used as described here:
 community.sophos.com/.../123294 
Regards