The DNS server DNS1 & DNS2 is the same as adding dns_nameservers the squid?
I am adding OpenDNS servers. to have more servers where to look and solve much faster names, according to some information that I found.
I created a template e-smith “10dnsnameserver” where this configuration “dns_nameservers OpenDNS-servers”
in tests evidenced good changes in the search or name resolution.