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Windows 2003 domain can't ping  host names in Windows 2000 domain

Posted on 2007-03-30
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Last Modified: 2010-04-18
I have a Windows 2003 domain trying to ping hosts in a Windows 2000 domain (2 different forests) My goal is  talk to the old domain using non FQDN host names.  Do not want WINS.  I can ping successfully when using the FQDN.  I can also perform an nslookup using the non FQDN host name.  I can not ping and client machines in the new domain can not talk to applications servers in the old domain.   How do I talk to the old domain using non FQDN host names then?  Under Windows 2003 DNS we have configured Conditional Forwarding to the old domain.   Also  tried adding the old domain as a secondary forward lookup zone.  On the Windows 2000 DNS have a delegation record for the new domain.  Tried adding the new domain as a secondary zone on the old domain as well.  This is a migration that might take a while.  
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Question by:rlmethod
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LauraEHunterMVP earned 500 total points
ID: 18827303
If I understand you correctly, you have a 2003 forest (let's call it 2003.com) and a 2000 forest (let's call it 2000.com). From a machine in the 2003.com forest, you want to be able to ping server1.2000.com by simply issuing the command "ping server1"?  Have I understood your question correctly?

If so, you need to add "2000.com" to the DNS suffix search list of your clients in the 2003.com forest. You can do this via Group Policy under Administrative Templates\Network\DNS Client\DNS Suffix Search List .

What this will do is as follows:

[1] User types "ping server1"
[2] Workstation will first attempt to resolve "server1.2003.com", since 2003.com is the DNS suffix of the workstation itself.
[3] If server1.2003.com does not respond, workstation will then attempt to ping "server1.2000.com"

(You can see how having a "server1.2003.com" and a "server1.2000.com" would present inconsistent behaviour.  A WINS server would enforce uniqueness of these "single-label" names across both forests; if you do not wish to use WINS as you've stated, enforcing the uniqueness of these names will be something you will need to handle manually/procedurally.)

If I have misunderstood your question, please re-state and/or provide additional details so that I can attempt to help you resolve your issue.

Hope this helps.

Laura E. Hunter - Microsoft MVP: Windows Server - Networking
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by:rlmethod
ID: 18827623
Well, just before you replied we did some more testing.  We are using the GPO to set the suffix search order and there is something wrong there.  We turned off the GPO and added the entries manually.  Now everything works.  LOL.  We'll take another look at the GPO next.  THANK YOU FOR YOUR REPLY!!
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