Round Robin and Failover
You can combine DNS Failover with some of our load balancing features, like Round Robin. Round robin records contain multiple IP addresses or hostnames (depending on record type). Every time the record is queried, it will cycle through the endpoints, returning the next in the queue each time. However, Round Robin alone is not reliable because the endpoints in the record could be down. That’s why we recommend always using Round Robin in tandem with DNS Failover. You can configure both services on one screen.
How to Setup Round Robin with Failover
For this tutorial, we will be demonstrating how to configure Round Robin with Failover using A records. You can apply these same steps and principles when using this configuration for CNAME and ANAME records as well.
1. Select Domains
In the sidebar menu, select Managed DNS and then click on Domains in the drop-down menu.
2. Select Your Domain
3. Add or Edit a DNS Record
Under the A Records section, click the icon to add a new record. If you already have a record created that you would like to add DNS Failover to, then click the check box next to the record, and then the icon.
4. Configure Round Robin with Failover
A. Name: The hostname for the record. To set the record for the root domain (@), leave this field blank.
B. TTL: Time to Live, measured in seconds, determines how long the record is cached in resolvers. For more information on best practices for TTLs, click here.
C. Geo Proximity: You can select a Geo Proximity rule to apply to the record, for more information on Geo Proximity, click here.
D. IP Filter: You can select an IP Filter to apply to the record, for more information on IP Filters, click here.
E. Record Mode: for this tutorial, please select "Round Robin with Failover".
F. IP: Enter the IP addresses you would like in the configuration with the primary IP entered first.
G. Sonar Check: If you have a Sonar Check enabled that you would like to be used to determine this IP's availability, you can select it here.
H. Enabled: The slider will automatically select On, however if you want to disable this IP then click the slider to change it to Off.
I. Active: tells you whether the IP is active in the round robin configuration, if the IP is turned off or marked down by a Sonar check, this will be marked inactive.
J. Status: If the IP is active or down, then it will say so here.
K. Add Another IP: Since you are doing a Round Robin configuration, you will want to add additional IP’s to your configuration. Just click the button, and follow the same directions for the text boxes as you did in F-J.
L. Notes: Add a helpful note if you wish.
M. Save: Click the Save and Close button to save your record. Don’t forget to commit your changes.