show how to configure custom nameservers

_toc.yml

@@ -33,7 +33,7 @@ chapters:
           - file: admin-guide/architecture/active-directory
       - file: admin-guide/configuration
         sections:
-          - file: admin-guide/configuration/hostname
+          - file: admin-guide/configuration/custom_nameservers
           - file: admin-guide/configuration/vgroot
           - file: admin-guide/configuration/citrix_vda
       - file: admin-guide/guidelines

admin-guide/configuration.md

@@ -2,5 +2,9 @@
 
 Here starts a so far small collections of configuration guides for sysadmins of RHEL installations using Puppet and Hiera.
 
+## Basic Setup
 - [Resize System Volumes (volume group `vg_root`)](configuration/vgroot)
+- [Custom Nameservers](configuration/custom_nameservers)
+
+## Special Installations
 - [Install Citrix VDA](configuration/citrix_vda)

admin-guide/configuration/custom_nameservers.md

@@ -0,0 +1,12 @@
+# Custom Nameservers
+
+The internal nameservers are configured according to the network zone by Puppet.
+
+If for some reason that is unsuitable, you might set your own in Hiera:
+
+```
+networking::nameservers_override:
+  - 192.33.120.5
+  - 192.33.121.5
+```
+