Some AD DNS Records Missing from 1 DC
Charles F Sullivan
This time I noticed that the IP address does not get listed when looking up Forestdnszones or Domaindnszones. (It does get listed as an NS for those zones.) Checking in AD DNS, I see that it is missing from the top nodes for Forestdnszones and Domaindnszones, but it is listed in all _tcp subzones. The A record is also missing from the root node for the domain, where these A records normally exist by IP address.
So in a nutshell, any AD record that contains and IP address isn't getting registered, it seems. It definitely is registering its reverse record.
I have never seen this before and there doesn't seem to be anything in the event logs that gives me a clue. Anyone know how I can fix this or what might cause it? It doesn't seem like creating a static A record for the IP address would be a good idea.
Charlie Sullivan
Principal Windows Systems Administrator
Philip Elder
_msdcs grey stub zone in domain.com zone?
_msdcs.domain.com zone set up correctly?
Make sure there’s no NS settings that point to an old DC.
Philip Elder MCTS
Senior Technical Architect
Microsoft High Availability MVP
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James Iversen
Hi, Do you have any "non-Microsoft" DHCP servers?
I have found that DHCP devices which do not have authority to change DNS records will fail forward lookup, while the machine itself has authority to update reverse.
Weird stuff when we try to expand our scopes using non-Microsoft or non-authoritative DHCP servers...
Jim
From: "Charles F Sullivan" <charles.s...@bc.edu>
To: ntsys...@googlegroups.com
Date: 05/05/2022 06:17 PM
Subject: [ntsysadmin] Some AD DNS Records Missing from 1 DC
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Charles F Sullivan
Network Adapter [00000001] vmxnet3 Ethernet Adapter:
Warning:
Missing A record at DNS server 10.10.10.30:
gc._msdcs.foo.blah
Warning:
Missing A record at DNS server 10.10.10.31:
gc._msdcs.foo.blah
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