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DCDIAG /TEST:DNS RETURNS Broken Delegation erros

Posted on 2009-04-17
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Last Modified: 2012-05-06
We are operating in a AD environment of Windows 2003 R2 servers in a single flat domain with three separate subnets. Each subnet has its own DC operating as its DNS server. When I run DCDIAG /TEST:DNS i receive error messages that delegation is broken. DC107 is the server I'm running the test from and we are not delegating DNS zones. Also any idea why it would state our domain twice?

 Summary of test results for DNS servers used by the above domain controllers:
    DNS server: 192.168.10.13 (dc107.danos.com.)
       1 test failure on this DNS server
       Delegation is broken for the domain danos.com.danos.com. on the DNS server 192.168.10.13
    DNS server: 192.168.12.14 (drdc107.danos.com.)
       1 test failure on this DNS server
       Delegation is broken for the domain danos.com.danos.com. on the DNS server 192.168.12.14
    DNS server: 192.168.14.8 (dc4hou07.danos.com.)
       1 test failure on this DNS server
       Delegation is broken for the domain danos.com.danos.com. on the DNS server 192.168.14.8
    DNS server: 192.168.15.13 (dc5laf07.danos.com.)
       1 test failure on this DNS server
       Delegation is broken for the domain danos.com.danos.com. on the DNS server 192.168.15.13
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Question by:DCITdept
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12 Comments
 
LVL 71

Expert Comment

by:Chris Dent
ID: 24171734

Odd record name.

Do you see a "com" folder with danos within it under your normal danos.com forward lookup zone?

Chris
0
 

Author Comment

by:DCITdept
ID: 24171761
Yes under the forward lookup zones folder
danos.com
com
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LVL 71

Expert Comment

by:Chris Dent
ID: 24171778

That'll be what it's seeing. If you see another "danos" folder underneath, is it greyed out?

Chris
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LVL 71

Expert Comment

by:Chris Dent
ID: 24171789

Hmm maybe not quite actually. I'd expect to see:

Forward Lookup Zones
   | - danos.com
              | - com
                     | - danos

If the danos folder exists there, and is greyed out then that's the source of the error. Check the NS records for it if it needs to exist, delete "com" and below if it doesn't.

Is that what you're seeing?

Chris
0
 

Author Comment

by:DCITdept
ID: 24171795
forward lookup zones folder
danos.com folder
com folder
danos folder (not greyed out) contains a single Host A record for a web server
0
 

Author Comment

by:DCITdept
ID: 24171968
Chris do you believe that this com folder is not needed? The web server record in the danos folder is at a DR site. Additionally there exist a host A record for this web server under the forward lookup zone.
Thanks
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LVL 71

Expert Comment

by:Chris Dent
ID: 24172073

What's under the com folder?

Chris
0
 

Author Comment

by:DCITdept
ID: 24172180
Danos folder with a single A host record
0
 

Author Comment

by:DCITdept
ID: 24174773
Forward Lookup Zones
   | - danos.com
              | - com
                     | - danos
Should I remove this danos folder and retest DNS?
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LVL 71

Accepted Solution

by:
Chris Dent earned 1000 total points
ID: 24174786

Sorry for the late reply, had to head off to bed.

Yes, please do :)

Chris
0
 

Author Closing Comment

by:DCITdept
ID: 31571636
THANK you for your assistance, DCDIAG /TEST:DNS ran cleanly without error
0
 

Author Comment

by:DCITdept
ID: 24174930
When we run DCDIAG we receive the following series of errors on DC107 which is our DNS server at our manin site. Shoudl we be concerned?

 An Error Event occured.  EventID: 0x00000457
    Time Generated: 04/18/2009   06:44:19
    (Event String could not be retrieved)
 ......................... DC107 failed test systemlog
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