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nslookup for internal domain name returns invalid IP address

After upgrading our domain from Windows 2003 to Windows 2008, nslookup returns the correct IP addresses of our domain controllers, but also one invalid IP (10.22.60.0) which is the network ID for an entire class C private subnet at our data center.

There is also a Host (A) record with the same IP address in DNS called (same as parent folder) and a Timestamp of 'static'.

Has anyone seen this before? Can it be corrected by merely deleting the Host (A) record from DNS?

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insidetech

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Will Szymkowski

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WORKS2011

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Sandesh Dubey

You can take backup of DNS and delete the invalid record. Restart the dns and netlogon service and run ipconfig /flushdns and ipconfig /registerdns and check. You also need to ensure correct dns setting as below.

Best practices for DNS client settings on DC and domain members.
http://abhijitw.wordpress.com/2012/03/03/best-practices-for-dns-client-settings-on-domain-controller/

For DNS backup see this
http://social.technet.microsoft.com/Forums/windowsserver/en-US/6409b8d5-da43-41f6-83ba-f706a6422dcc/dns-manual-backup?forum=winserverDS

PankowIT

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Here are results of the dcdiag /test:DNS

Directory Server Diagnosis
Performing initial setup:
Trying to find home server...
Home Server = norcal-dc1
* Identified AD Forest.
Done gathering initial info.
Doing initial required tests
Testing server: AreaZero\NORCAL-DC1
Starting test: Connectivity
......................... NORCAL-DC1 passed test Connectivity
Doing primary tests
Testing server: AreaZero\NORCAL-DC1
Starting test: DNS
DNS Tests are running and not hung. Please wait a few minutes...
......................... NORCAL-DC1 passed test DNS
Running partition tests on : ForestDnsZones
Running partition tests on : DomainDnsZones
Running partition tests on : Schema
Running partition tests on : Configuration
Running partition tests on : pankow
Running enterprise tests on : pankow.com
Starting test: DNS
Test results for domain controllers:
DC: norcal-dc1.pankow.com
Domain: pankow.com
TEST: Dynamic update (Dyn)
Warning: Failed to delete the test record dcdiag-test-record in zone pankow.com
norcal-dc1 PASS PASS PASS PASS WARN PASS n/a
......................... pankow.com passed test DNS