I recently did an upgrade from 2003 AD to 2008 AD onto a new box. I've kept the 2003 running as a secondary system, but I moved the FSMO files, ran everything properly including setting up the DNS.
Now here's my issue: I have random computers on my network (all static IP btw) that are flaking out for a period of 5-15 minutes. They can see external IP addresses fine (I use 4.2.2.2 as a secondary DNS), but cant see the SQL or Sharepoint server. Have to either reboot or do a dns flush in order for it to work and even then sometimes that doesn't work.
The old server 192.168.1.10 and the new server 192.168.1.5 both seem to work and I changed all the workstations to reflect the .5 unit. Does anyone know what could be causing this?
I'm a software guy by nature, developing C# apps etc; I'm not a network admin by trade so its been somewhat of a leaning curve although I do have some experience.
Thanks