1 of 4 Virtual Machines cannot communicate outside the vSwitch

[Allen Kim Palima]

I would like to ask for support on the VM connection issue.

We have 1 Physical Host Server with 4 VMs

All VMs are working perfectly and After I restarted 1 virtual machine it was not able to communicate with other devices connected outside the virtual switch it can only communicate with the virtual machines connected with the same virtual switch.

the virtual switch (vSwitch) has three (3) physical NICs connected to it that are connected to the network outside the host. other 3 virtual machines are able to communicate outside the vswitch.

[Scott Vessey]

As your post needs moving to the area for ESXi, I reported it to the volunteer moderators.

 

[GeoPerkins]

Your symptoms sound like a guest networking issue, what steps have you done to troubleshoot the guest VM networking settings?

Assuming firewall allows connectivity, troubleshoot subnet mask, default gateway settings first.

What changes (besides reboot) have occurred?

[Allen Kim Palima]

 

Let me correct my original post, This is what happened on 1 of our VM servers after I shut it down and then powered it on, the network issue occurs it cannot communicate outside the vswitch network it can only communicate inside the vswitch network but the other 3 VM servers can communicate from inside and outside the network.

The IP settings for all VMs are Static IP.

I tried to remove/add a network adapter but still, it can't pass through the outside network.

[GeoPerkins]

Since the other 3 VMs can communicate, it does continue to seem like a guest VM problem, not a larger issue with the virtual switch, physical connectivity or the larger network infrastructure external to your ESXi host.... 

Without more details I am just guessing. I do recall a bug from long ago (not sure if it were a Windows Update or a VMware software update). Again, light on your details, I am guessing that the guest VM is running Windows. What version?

In that long-ago scenario, after the update, the adapter became disabled in Windows. If there is an IP conflict (even the disabled adapter) Windows is unable to communicate, if I recall the situation correctly. Solution was to remove the adapter in the VM guest (using vSphere or the ESXi host web management GUI), open the Windows classic Control Panel view of Network Adapters, look for a disabled adapter and delete it. Add a new adapter in the guest VM, set up the IP properties in Windows. A restart of the guest VM shouldn't be required, but would not hurt. 

 

[Allen Kim Palima]

Dear ,

Yes all 4 VMs are running Windows Server 2019 version.

I will try the solution you provided and i will update it if works.

Thank you so much for your help.

Regards,

Allen

[Kinnison]

Hi,

If I may I would like to add a note, check if by chance there is not left what is called a "ghost network adapter" among the hidden devices.
That too is a circumstance that may cause you trouble.

Regards,
Ferdinando