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SamAndrew81
Asked: 2023-10-06 04:47:30 +0800 CST

Windows Server 2019 erroneously changing the subnet on NIC1 to /24 after each reboot, but it should be /22

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Every time I reboot this Windows Server 2019 VM, Windows changes the subnet from 255.255.252.0 to 255.255.255.0 which is incorrect. The subnet must be /22 (255.255.252.0) for traffic to pass.

Screenshot of the issue

I found this Hotfix, but it's only for Server 2012 so I cannot install it:

networking

1 Answers

  1. Best Answer

    Replacing the E1000E virtual NIC ("Intel Pro 1000 MT") with a VMXNET 3 virtual NIC in vSphere resolved the issue.

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