DNS error

[Mikehawo]

Hi,

Just a bit of back ground info.. Recently I decommissioned a 2012r2 DC and replaced it with a fresh copy 2019 Server (virtual). Kept same name/IP etc. I have DFS "trustshared" running across all sites, total of 5 DCs. The one i replaced was the operations master and looked after the following roles "RID, Infrastructure and PDC" I did swap these roles to another DC 1 week prior to me DC promoting the older server off and building the new one. One week after everything had settled down i moved all the roles back. Everything seems to be fine apart from I'm now getting loads of errors saying the DNS server has entered a critical state. Event ID 4015 : The DNS server has encountered a critical error from the Active Directory. Check that the Active Directory is functioning properly. The extended error debug information (which may be empty) is "". The event data contains the error.

Not sure if its related but im also getting a DFS error Event ID: 5008 The DFS Replication service failed to communicate with partner WELLGPDC1 for replication group Domain System Volume. This error can occur if the host is unreachable, or if the DFS Replication service is not running on the server.

The error seems to be moaning about the same server so i look in DNS at the forward lookup zones and noticed wellgpdc1 wasn't resolved (see Pic) so i resolved it and now it has [::1] after it. is this normal? I have read that the error can be caused by the virtual servers being backed up due to system state pauses etc, which i do use Windows Server backup to backup all my virtual servers at 19:00. the Final DNS entry always seems to be The DFS Replication service successfully established an inbound connection with partner WELLGPDC1 for replication group Domain System Volume. Which confuses me! because i don't get any events relating to the other DCs.







All the other DCs are 2012r2

DXDIAG results

C:\Windows\system32>dcdiag

Directory Server Diagnosis

Performing initial setup:
Trying to find home server...
Home Server = HOYLSPDC1
* Identified AD Forest.
Done gathering initial info.

Doing initial required tests

Testing server: Springwood\HOYLSPDC1
Starting test: Connectivity
......................... HOYLSPDC1 passed test Connectivity

Doing primary tests

Testing server: Springwood\HOYLSPDC1
Starting test: Advertising
......................... HOYLSPDC1 passed test Advertising
Starting test: FrsEvent
......................... HOYLSPDC1 passed test FrsEvent
Starting test: DFSREvent
There are warning or error events within the last 24 hours after the SYSVOL has been shared. Failing SYSVOL
replication problems may cause Group Policy problems.
......................... HOYLSPDC1 failed test DFSREvent
Starting test: SysVolCheck
......................... HOYLSPDC1 passed test SysVolCheck
Starting test: KccEvent
......................... HOYLSPDC1 passed test KccEvent
Starting test: KnowsOfRoleHolders
......................... HOYLSPDC1 passed test KnowsOfRoleHolders
Starting test: MachineAccount
......................... HOYLSPDC1 passed test MachineAccount
Starting test: NCSecDesc
......................... HOYLSPDC1 passed test NCSecDesc
Starting test: NetLogons
......................... HOYLSPDC1 passed test NetLogons
Starting test: ObjectsReplicated
......................... HOYLSPDC1 passed test ObjectsReplicated
Starting test: Replications
......................... HOYLSPDC1 passed test Replications
Starting test: RidManager
......................... HOYLSPDC1 passed test RidManager
Starting test: Services
......................... HOYLSPDC1 passed test Services
Starting test: SystemLog
......................... HOYLSPDC1 passed test SystemLog
Starting test: VerifyReferences
......................... HOYLSPDC1 passed test VerifyReferences


Running partition tests on : ForestDnsZones
Starting test: CheckSDRefDom
......................... ForestDnsZones passed test CheckSDRefDom
Starting test: CrossRefValidation
......................... ForestDnsZones passed test CrossRefValidation

Running partition tests on : DomainDnsZones
Starting test: CheckSDRefDom
......................... DomainDnsZones passed test CheckSDRefDom
Starting test: CrossRefValidation
......................... DomainDnsZones passed test CrossRefValidation

Running partition tests on : Schema
Starting test: CheckSDRefDom
......................... Schema passed test CheckSDRefDom
Starting test: CrossRefValidation
......................... Schema passed test CrossRefValidation

Running partition tests on : Configuration
Starting test: CheckSDRefDom
......................... Configuration passed test CheckSDRefDom
Starting test: CrossRefValidation
......................... Configuration passed test CrossRefValidation

Running partition tests on : ECMTrust
Starting test: CheckSDRefDom
......................... ECMTrust passed test CheckSDRefDom
Starting test: CrossRefValidation
......................... ECMTrust passed test CrossRefValidation

Running enterprise tests on : ECMTrust.local
Starting test: LocatorCheck
......................... ECMTrust.local passed test LocatorCheck
Starting test: Intersite
......................... ECMTrust.local passed test Intersite

C:\Windows\system32>

Any Help is resolving this would be really appreciated.

Cheers

Mick


Mikehawo

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