I'm not exactly certain what you're asking, but if you've got no DNS information in your /etc/resolve.conf file, you should add it there:
domain <dns server name>
nameserver xxx.xxx.xxx.xxx
nameserver xxx.xxx.xxx.xxx
Where xxx.xxx.xxx.xxx is the IP address of the primary and secondary DNS server. When you put in the "<dns server name>", be sure to put in the correct name without the <> in there. Hope this helps some.