Sun Java System Reference Configuration Series: Portal Service on Application Server Cluster

DNS Considerations

In implementing a network connectivity specification, you must coordinate the setting of virtual service IP addresses with the configuration of your DNS servers (or whatever naming service your network is using). Doing so ensures that the correct service names and IP addresses are routed publicly. In Figure 3–1, the externally accessible DNS server maps the URL to the virtual service IP address for the Gateway service load balancer. For example, the internal DNS server maps the host name to the same virtual service address.