Trouble deploying NC

Question

Trouble deploying NC

Closed this issue a month ago · 6 comments

Hello,

how do I get past the error when deploying NC (with sdnExpress or WAC): Software Defined Networking (SDN) requires an OS containing Windows Server 2016 Datacenter, Windows Server 2019 Datacenter, or Azure Stack HCI." ?

I did the HCI cluster with 2022, 2025 and azure hci and always the same error, no matter what I do.

Also, I deployed NC with powershell successfully, and when I try to add it to WAC, it fails and logs sdn-wac-validation-cert.log show:
attempting to query sdn networkController

TY

Answer 1 · 2024-08-06T22:21:00.000Z

Hi
Which OS version vhdx file did you supply to SDN Express (or WAC)? You mention that it was not working, but later you were able to deploy NC. How did you fix the problem?

For the WAC issue, can you share the log file.

Answer 2 · 2024-08-07T06:45:23.000Z

When I enter the controller REST UI and click Validate, It shows me screen on the pic:

Then it shows: Validating other SDN configuration....
And right after that: Windows Admin Center ran into unexpected error during validation of the Windows Server Network Controller. More information may be found in the users documents directory on the WAC gateway.

Only these 2 logs appear in documents on WAC server when I try to add controller:
sdn-wac-validation-rsat.log
sdn-wac-validation-cert.log

I was using win server 2025 evaluation vhd and 2019 evaluation vhd when tried installing from WAC/SDNExpress.

Later, I deployed the controller by creating normal win serv 2025 datacenter VM and then deployed controller with powershell inside the VM.

Answer 3 · 2024-08-07T14:17:10.000Z

I managed to install now through WAC. I had to convert some non-evaluation iso into vhdx and now it's OK.

Answer 4 · 2024-08-07T23:38:48.000Z

Are you still seeing the WAC issue?

Answer 5 · 2024-08-08T06:05:43.000Z

That issue was resolved. Thank you.

But now I have another issue, Logical Networks tab doesn't want to load:

I updated all servers with Windows update.

NC seems to work fine:

I am now running NC on Win SRV Datacenter 2019 on top of Win SRV Datacenter 2025 Hyper-V.

Answer 6 · 2024-08-08T10:36:03.000Z

OK, I deployed NC 2022 with SDNExpress scripts (it didn't work with WAC) on 2022 HCI cluster and now it is working. I guess 2025 servers don't have SDN support yet.

Thank you