[chef] using ip address for chef_server_url on /etc/chef/client.rb

[Santhosh < >]

Hi, Using a hostname in etc/chef/client.rb for chef_server_url is not an 
option for me, Hence I'm forced to use a ip address for my chef server. 
Firstly , is this even allowed.?

Second, at some point the chef-client tries to reverse lookup the ip 
address and tries to find the hostname(The DNS will return NXDOMAIN) and 
is not working.

Can someone help me out.?

Santhosh