this example, the record set resolves the desired domain to the
Elastic IP Address on the NetScaler VPX that fronts the web servers
in the VPC. It is a Type A IPv4 address that is the Elastic IP Address
assigned to the VIP (192.168.0.50) on the NetScaler VPX.
a redundant configuration, configure the domain to resolve to every
Elastic IP Address associated with a VIP on the NetScaler VPX.
Citrix NetScaler can host multiple applications on one IP address
with Content Switching enabled.
Create a health check and associate it with a record
Use Route 53 health checks to validate that the application
is available for a given Availability Zone. If Route 53 detects
a failure, such as an Availability Zone failure, NetScaler VPX failure, or
failure of the web servers, it stops serving the associated ElasticIP
Address via DNS resolution until the health check is successful.