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How to Prevent Static IP Loss on Upgrade?

  • July 5, 2025
  • 1 reply
  • 254 views

Hey folks,

We recently ran into an issue while upgrading VMware Tools to version 13.0.0 on Windows Server VMs.

After the upgrade, we noticed:

โŒ Static IPs disappeared, and VMs defaulted to DHCP โ€” resulting in network drops and service disruptions.

If you're managing Windows servers with static addressing, planned properly.

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๐Ÿ” Why Does This Happen?

When VMware Tools updates, it often replaces the virtual NIC driver (like VMXNET3).
Windows detects this as a new network adapter, and:

  • The original NIC is hidden
  • Static IP is no longer bound to the new NIC
  • The VM falls back to DHCP or ends up with no IP

โœ… What You Can Do to Prevent It

Hereโ€™s the quick checklist we follow now:

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๐Ÿ”น 1. Record Static IP Details

Before upgrading, export or note down:

  • IP, Gateway, DNS
  • NIC names
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๐Ÿ”น 2. Avoid NIC Driver Upgrade (If Possible)

Use custom install during VMware Tools upgrade.
Uncheck NIC driver updates unless required.

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๐Ÿ”น 3. Clean Up Old Adapters

After upgrade, go to Device Manager
โ†’ Enable View > Show Hidden Devices
โ†’ Remove any ghost/hidden NICs

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๐Ÿ”น 4. Test First in Staging

Never update directly in production. We always test on low-impact VMs first.

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Pro Tip:

Take a snapshot before the upgrade โ€” itโ€™s a lifesaver for quick rollback.

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1 reply

ntnx_angelo
Nutanix Employee
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  • Nutanix Employee
  • July 7, 2025

โ€‹@SAIBALCย good suggestions, and thanks for sharing your experience.