You can create an IP cluster in the Management section.
In the above example the customer has an IP of 220.127.116.11 and a second IP of 18.104.22.168
If using a hostname it would be for example xyz.com#10;xyz.com#20;
#10 Denoting this IP is the Priority 1 status
#20 Denoting this IP is the Priority 2 status etc.