ESXi 6.5 VM's losing network connection

[MStraet]

Hello,

I have an environment with 2x HP DL360 Gen8 in a cluster. I recently upgraded my vCenter & hosts from 6 to 6.5 Patch 1.

Recently I started having problems with some VM's losing their network connection. When I go check the IP settings in the VM there is no problem but they are not pingable. The only solution I have found is to edit the VM settings, disconnect the NIC and reconnect and the NIC and the VM is pingable again.

I have been googling what the cause could be but I cannot seem to find anything, only VM's losing connection after a vMotion but that's not the case.

Anyone else experienced this kind of problem?

I could update my hosts to 6.5 U1 but when I upgraded the U1 was not available yet.

Thank you.

Kind regards,

Michael

[schepp]

Hi Micheal,

please check if this happens to specific adapter, for example the e1000 or the VMXNET3.

If it only happens on one adapter change the adapter to the working one as a quick workaround.

Tim

[MStraet]

Hi Tim,

All the network adapters are VMXNET3. Also I'm trying to find a link why it happened to certain VM's and not all.

Also I checked I have ESXi version 6.5 patch 1 and not the latest update 1. I already upgraded my vCenter to 6.5 Update 1. I will update my hosts to Update 1 too and check if the problem persists.

Kind regards,

Michael

[Nick_Andreev]

Let us know how you go and whether the latest update solves the problem.

[JMachieJr]

Is your issue occurring after a vmotion? Or is it just randomly happening to VM's that have not had any changes?

[hussainbte]

Disconnecting the N/W adapter and reconnect it make the same difference if you vMotion a VM and the issue is with vLAN configurations and you are using nic teaming.

Are you using nic teaming and vLANs.. if not even I would like to see the results after the upgrade.