Hello,
We have 2 Server 2008 DNS servers that are pointing to each other for DNS. There are random records that are getting deleted or really assuming here that they are getting savaged. This leads me to believe that netlogon isn't refreshing the DNS records.
The A records are static and dynamic.
Zone is set for nonsecure and secure.
Scavenging is set to 7 days
Refresh interval is set to 1 hour.
These DNS/WINS servers are DC's.
Hope I didn't leave anything out.
Thanks!!!
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No DHCP server does not register the clients DNS the clients register themselves.
What's strange is that the CNAME went missing, that's a static entry as well as other A records that we're static. I've also made sure that they do not have the box checked "Delete this record when it becomes stale" on the static records.
The CName is strange, you're right. Unless some client is registering itself with that name.
How is DNS set up, AD Integrated? Pointing a DNS server to another DNS server isn't the best idea, but it shouldn't cause the problems you're seeing.
Does your DNS do WINS lookups? If so, is it possible some user has a username that is the same as the CNAME records?
Also, how are you determining that the records are missing? Are you using NSLookup or the GUI? Try NSLOOKUP if they're missing in the GUI -- it may just be a display issue.
Yes DNS is AD intergrated.
I used to always point DNS servers to themselves but we recently had a consultant come in for a AD migration project and he had explained that doing so isolates themselves like an island. Could you explain which is better and why. I've Googled this but get such mixed reviews.
DNS and WINS are both running and running on the same servers. How would I know if DNS is doing WINS lookups.
No username with the same name as the server.
This was determined an issue due to our 3rd party apps that rely on our DNS server for resolution and once the record was gone it caused many issues. Didn't check nslookup but we had multiple calls on issues and noticed record was gone from both DNS servers.
I also ran a dcdiag /test:dns and came back with a few issues.
Thought this might help in the troubleshooting.
Thanks!!!
Running partition tests on : ForestDnsZones
Running partition tests on : DomainDnsZones
Running partition tests on : Schema
Running partition tests on : Configuration
Running partition tests on : TEST
Running enterprise tests on : test.local
Starting test: DNS
Test results for domain controllers:
DC: TESTDC01.test.local
Domain: test.local
TEST: Basic (Basc)
Warning: The AAAA record for this DC was not found
TEST: Dynamic update (Dyn)
Warning: Failed to delete the test record _dcdiag_test_record
in zone test.local
TEST: Records registration (RReg)
Network Adapter [00000013] BASP Virtual Adapter:
Warning:
Missing AAAA record at DNS server 192.168.X.XXX:
TESTDC01.test.local
Warning:
Missing AAAA record at DNS server 192.168.X.XXX:
gc._msdcs.test.local
Warning:
Missing AAAA record at DNS server 192.168.X.XXX:
TESTDC01.test.local
Warning:
Missing AAAA record at DNS server 192.168.X.XXX:
gc._msdcs.test.local
Warning:
Missing AAAA record at DNS server ::1:
TESTDC01.test.local
Warning:
Missing AAAA record at DNS server ::1:
gc._msdcs.test.local
Warning: Record Registrations not found in some network adapters
TESTDC01 PASS WARN PASS PASS WARN WARN n/a
......................... test.local passed test DNS
Without knowing more about it I'd say it would.
The minimum you should consider for the Refresh Interval is 24 hours. Longer is better as it allows room for mistakes.
If DHCP were updating for clients they would Refresh at intervals equal to half of the lease. For example, if the lease is 8 days, they refresh once every 4 days.
Chris
Business Accounts
Answer for Membership
by: gregcmcsePosted on 2009-05-14 at 12:29:48ID: 24388724
If your workstations are configured to register themselves in DNS, then they will unregister themselves when the workstation does a normal shutdown.
Is DHCP configured to register clients in DNS?