NOTE: THESE INSTRUCTIONS ARE FOR OUR LEGACY DNSV2 PLATFORM. THE NEW DNSV3 PLATFORM IS QUITE A BIT DIFFERENT (AND MORE INTUITIVE TOO), and for that we recommend this KB article instead.
Configuring DNS failover is not difficult, provided the following steps are followed exactly.
1. Log in to your DNS account on the legacy platform at https://dns.netriplex.com
2. View the domain where you wish to create a failover record
3. View or add an 'A' record that will be your failover record. Only 'A' records support the failover feature.
4. Configure the 'A' record with a temporary TTL value and IP address. These will be the default values when the record is converted to a failover record and will become null and void at that time.
5. Check the check box at the far left of the 'A' record to enable failover. Now click save.
6. Click the Failover link on the left navigation page to view all 'A' records enabled for failover.
7. Click the view icon for the 'A' record you wish to manage.
8. In the large box labeled "IP Addresses:", enter at least two IP addresses for your servers (a primary and a secondary). Each IP address MUST be on it's own line. No separators are required.
9. In the drop down menu for "Create DNS Records For:" choose if you would like to send traffic to all servers while they are available or just to the first one in your list. Regardless of the method, as soon as an IP address fails the test, it will stop sending traffic to it.
10. In the "Update Domain Aliases" box you can enter other 'A' records THAT YOU HAVE NOT ALREADY CREATED here. For example, if the current 'A' record you are editing is 'netriplex.com', you could put 'www.netriplex.com' and 'ftp.netriplex.com' here (on separate lines) to change those records at the same time. This feature helps save time so you don't have to configure failover for multiple 'A' records. Unfortunately it does require that all 'A' records follow the same IP address configurations.
11. Choose your "Monitor Type" if the default HTTP method is not suitable.
12. Choose your "DNS A-Record TTL" value. We recommend a low value, somewhere between 120 and 300. This value is in seconds and tells DNS servers around the world how long they are permitted to cache the record for. The smaller it is, the quicker you can fail over.
13. If you wish to be notified via email when a server fails a test, check the box and specify an email address. Please note that our system will email you EVERY TIME it fails a test, so you may receive multiple emails depending on how often you have a test configured before a failover occurs.
If you require further assistance, please contact support.