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http://documentation-devel.engineering.redhat.com/docs/en-US/OpenShift_Enterprise/2/html-single/Deployment_Guide/index.html#sect-Configuring_DHCP_and_Host_Name_Resolution Procedure 5.7. To Configure DHCP on the Broker Host: Step 1 It turns out that these two lines don't do anything given the rest of the config: supersede host-name "broker.example.com"; supersede domain-name "example.com"; They should be removed (have been from the script). Though they don't do any harm either, it's misleading about where to modify this stuff.