You can configure and work with the vCloud Availability solution using IP addresses or domain names.
To use Domain Name System (DNS), you must register the domain names with a DNS server. This DNS server must be accessible to the vCloud Availability appliances that are deployed in the service provider data center.
If you use static IP addresses, the vCenter Server IP pool must have a valid DNS server.
If you use Dynamic Host Configuration Protocol (DHCP) for IP address management, the DHCP server must provide a valid DNS server for each deployed appliance.