Enthusiast
Enthusiast

Windows 10 pro guest on ESXi 6.7 loses network connectivity with static IP

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Hello all,

I recently installed Windows 10 Pro on a VM hosted on ESXi 6.7.

The new machine gets an IP address from DHCP as followed, running ipconfig:

IPv4 10.1.12.129

Subnet Mask 255.255.255.0

Default Gateway 10.1.12.1

When I assign it a static IP (10.1.12.87) connectivity is lost and this is what I get running ipconfig:

IPv4 169.254.116.155

Subnet Mask 255.255.0.0

Default Gateway 10.1.12.1

Also, when I check the adapter Status -> Details I notice that there's a line Autoconfiguration IPv4 169.254.116.155

As soon as I change it back to DHCP, it acquires the same IP above (.129) and everything is working again

I verified that it's not a DNS issue.

I tried to disable and reenable the network adapter, but with no success.

If it's relevant, the vSwitch includes a dedicated NIC, uplink to the Core switch, the port is untagged.

Any help will be highly appreciated!

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Leadership
Leadership

The behavior that you describe points to a duplicate IP address conflict.

Can you confirm that this IP address is not already in use?

Are you able to assign another static IP address?

André

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3 Replies
Leadership
Leadership

The behavior that you describe points to a duplicate IP address conflict.

Can you confirm that this IP address is not already in use?

Are you able to assign another static IP address?

André

View solution in original post

Enthusiast
Enthusiast

I was about to update this post and close it but you beat me to it Smiley Happy

Yes, that is correct.

Before I assigned this IP I pinged it and because there was no reply I assumed it was available.

I checked my documentation and found out that it was actually in use.

As soon as I selected an available IP address the issue was resolved.

Thank you André for the quick response!

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Leadership
Leadership

Moderator: Thread moved to the Windows guest area, not a vSphere matter.

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