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matteu31400 avatar image
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matteu31400 asked DSPatrick commented

network card connectivity issue on domain controller

Hello,

For one custommer, I have and issue where network card doesn't work anymore after random time (2/3days) and I need to disconnect and reconnect the network card to fix the issue.
It's 2012R2 operating system.
The server is DC + DNS + DHCP.
The server has 2 network interface
1 1Gb for lan
2
10 with teaming for iSCSI (for backup repository)

I would like to find recent documentation to :
-Show multihomed is not recommended on domain controller
-Nic Teaming on domain controller is not recommended / supported

I don't find anything about these point on documentation except for 2000 or 2003.

I will also try to upgrade firmware / bios on this server and see if the issue is solved.

Thanks for your help.

windows-serverwindows-active-directory
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DSPatrick avatar image
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DSPatrick answered

Multi-homing a domain controller will always cause no end to grief for active directory DNS. There should be no need to team adapters on a domain controller. If the loading were that high then the solution is to add more domain controllers.

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matteu31400 answered

My issue here is my domain controller is not dedicated to this function...

But you're right, it's not recommended to have DC with other function and it's enough to say the configuration is not good.

Thanks :)

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DSPatrick answered

My issue here is my domain controller is not dedicated to this function...

Another option is to install the hyper-v role (as only role) on host, then stand up two virtual machines. One dedicated for active directory domain services, and another virtual machine for other role.

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matteu31400 answered

On my case it's not possible because it's used as tape server.
Tape server need to be used on bare metal and not on VM.

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DSPatrick answered

Regardless the multi-homing and teaming are the two target issues that need to go away.

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matteu31400 answered DSPatrick commented

Yes, I agree, I just would like to find documentation about it but I didn't.

· 2
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Its just common information, there are likely are no specific KBs for this.

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Just checking if there's any progress or updates?

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LimitlessTechnology-2700 avatar image
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LimitlessTechnology-2700 answered

Hello @matteu31400,

If the server isn't running the DNS service, go to the Configure the Routing and Remote Access server to register only the IP address of the local network adapter in the WINS section.

Add the PublishAddresses and RegisterDnsARecords registry values for the DNS and Netlogon services

Do check the below link which discusses Name resolution and connectivity issues on a Routing and Remote Access Server that also runs DNS or WINS for a better understanding

https://docs.microsoft.com/en-us/troubleshoot/windows-server/networking/name-resolution-connectivity-issues#cause



Hope this answers all your queries, if not please do repost back.
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