Cannot see 2003 server after having 2008 R2 server online

Zion Phil
Zion Phil used Ask the Experts™
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Installed 2008 R2 server onto a network on existing 2003 server hardware (different HD's). Swapped HD's to 2008. Started 2008 server and all computer clients could see server fine (XP,s, Vista, Win 7's). Had up for about 7 hours. Shut down 2008 server, swapped back to 2003 server setup and now none of the clients can see the 2003 server. Did ipconfig /flushdns on a client and ipconfig /renew on a client and still not see 2003 server. Tried to UNC browse to server... no go. Linksys Router handing out DHCP with IP of server as one of the DNS's. Worked fine in this config before. What up?
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Top Expert 2012

Commented:
Can you ping the server by IP address? Can you access server by \\IPaddress?
Zion PhilPresident

Author

Commented:
yes. sorry. Just tried that. all good by \\IPAddress
Top Expert 2012

Commented:
Can you ping by name?
Zion PhilPresident

Author

Commented:
All of a sudden everything started working. Hmmm. Go figure. Thanks for responses
Top Expert 2012
Commented:
Most likely the Name registered again with the Master Browser which should be itself the clients then were able to find the new master browser after you removed the 2008 Server which was the master browser for a while

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