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On clicking the button 'Create' we see the following interface: 
We now enter the IP address of the Node. 
Entering the Nodename of the host, which is pinger.aup.edu.pk 
Next is site name. This should be aup.edu.pk 
Nickname is way to identify domains. It is very much similar to reverse DNS lookups. e.g. In case of our Example the Nickname is
PK.AUP.EDU.N2. The entry would then be: