There are a couple of additional lines you should add to your resolov.conf file.
It is important to add the the "domain" name and the "domain" search if you know them: for example:
domain hsd1.ks.comcast.net <additional domain name>
search hsd1.ks.comcast.net <additional domain search if needed>
The nameserver is usually the DNS server for the domain or a secondary server, therefore the the domain is not alway necessary unless you are in a multiple domain network.
The search line tends to be more important as the networks become more complicated. I use a small router setting between my cable modem and my other computers. This means I nave a home domain and then the cable domain -- the router takes care of the transactions but I still need the search statement so my computers know to search the cable domain in addition to the home network...
Just keeps things cleaner ---
There are two other files you need to look at to keep persistence during a reboot --- this is the "/etc/defaultrouter" and the /etc/netmasks" file.
Solaris 10 also uses the /etc/hosts and a file called "/etc/hostname.<interface>
These files are set up during install or a reconfigure, but one should double check them if you are having network issues. The Solaris 10 x86 and/or x64 OS is real picky when it comes to the network configuration... Please make sure your network is active and hooked up when you install. I have had installs fail because the network was not hooked up... (The Solaris 10 SPARC OS is less sensitive)
If you are still having issues feel free to contact me directly < firstname.lastname@example.org
Thanks -- Dale