Had a strange thing happen. I have an HP laptop with Win 7. I got onto the WiFi network at work which is just bridging the data subnet. But oddly the expected local IPv4 DNS server was not taking priority as viewed by nslookup. I think that may be my home comcast assigned DNS.
So the question is: Can I make IPv4 addressing and assigned DNS always take priority over IPv6? The way I dealt with the immediate issue was to just disable IPv6 on the wifi nic. That worked. But wonder if there's a more subtle approach I could take.