To leverage the smart routing options in the NOC Auth-DNS service a zone file must have more than one A record for the same domain.
To create multiple A records for the same domain, do the following:
Step 1 – Open Domain Zone File
From the Authoritative DNS dashboard, click the name of the domain in your domain list.
This will automatically open the zone file for the domain.
Step 2 – Add New Record
Click Add New Record
Select the A record type.
Name your subdomain, in our example we’ll go with smart.
Repeat the process twice, using the same name for the subdomain, but selecting a different IP for the origin.
Doing this will automatically activate the enhanced records interface.
Step 3 – Configure Smart Routing Options
Click on “edit enhanced options” to access the smart routing options: