Domain Name Service (DNS) requirements
Ensure that your servers have DNS set up correctly before installing Network Manager.
Domain names
Ensure that all servers onto which you want to install any components of Network Manager have the host name defined as a fully qualified domain name (FQDN). Incomplete or incorrect DNS setup can cause problems installing or using Network Manager.
On UNIX™ platforms, the host name is defined in the /etc/hosts file.
On the machine where you install Network Manager components, ensure you include the IP address, FQDN, and short name in the /etc/hosts file before installing Network Manager, and ensure that the FQDN and short name only resolve to the same IP address and reverse resolve to the FQDN or short name.
The format
is IP address FQDN shortname.
For example, add a line similar to the following to /etc/hosts: 9.10.11.12
yourserver.domainname.com yourserver
This ensures that the FQDN is set as the Hostname entry when Network Manager is installed.