DNS overview

The DNS Configuration page can be accessed by navigating from the main menu to Administration > Remote Servers > DNS Configuration.

The page presents a single row of tabs. Each tab represents a network element and all servers participating in that network element. In addition to the tabs, the page also presents Insert, Edit, and Delete buttons. These buttons are active or inactive based on the presence of (or lack of) an active DNS configuration.

Note:

Only one DNS server is allowed to be configured per network element.

Once a DNS configuration has been applied, the page displays the name server and address as well as each of the defined search domains for that name server.

A DNS configuration can be applied globally to the system or to a specific network element. The DNS configuration is considered in GLOBAL mode if only a NO configuration exists. Otherwise, it's per-site. Put another way, if a single DNS configuration is only applied to the NO network element and no other tab receives a configuration then the DNS configuration is in GLOBAL mode and serves all the network elements. If two or more DNS configurations are applied to the system the configuration is in SITE mode. If no DNS configuration is applied then the system is in UNCONFIGURED mode. To determine the current mode of the system access the Info list.

Note:

Once the system is in SITE mode, any network element tab not containing a DNS configuration is excluded from accessing a DNS server. If you want all network elements to have access to a DNS name server while the system is in SITE mode then each tab must be configured even if they use the same name server and search domains.