Failover routing
Failover routing lets you route traffic to a resource when the resource is healthy or to a different resource when the first resource is unhealthy. The primary and secondary records can route traffic to anything from an Amazon S3 bucket that is configured as a website to a complex tree of records. For more information, see Active-passive failover.
You can use failover routing policy for records in a private hosted zone.
For information about values that you specify when you use the failover routing policy to create records, see the following topics: