BugZero | VMware vCenter BugID f827851ab16d - You cannot add or modify an existing network adapt...

VMware vCenter - Defect ID: f827851ab16d

You cannot add or modify an existing network adapter on a virtual machine

VMware vCenter - Defect ID: f827851ab16d

You cannot add or modify an existing network adapter on a virtual machine

Last updated on January 19th, 2026

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Bug Details

Status: Known
Impact Category: Virtual Machine Management Issues
Workaround Available:

Description

Disclaimer

A custom bug ID has been generated as the vendor did not provide one: f827851ab16d

Overview

If you try to add or modify an existing network adapter on a virtual machine, the Reconfigure Virtual Machine task might fail with an error such as Cannot complete operation due to concurrent modification by another operation in the vSphere Client. In the /var/log/hostd.log file of the ESXi host where the virtual machine runs, you see logs such as: 2020-07-28T07:47:31.621Z verbose hostd[2102259] [Originator@6876 sub=Vigor.Vmsvc.vm:/vmfs/volumes/vsan:526bc94351cf8f42-41153841cab2f9d9/bad71f5f-d85e-a276-4cf6-246e965d7154/interop_l2vpn_vmotion_VM_1.vmx] NIC: connection control message: Failed to connect virtual device 'ethernet0'. In the vpxa.log file, you see entries similar to: 2020-07-28T07:47:31.941Z info vpxa[2101759] [Originator@6876 sub=Default opID=opId-59f15-19829-91-01-ed] [VpxLRO] -- ERROR task-138 -- vm-13 -- vim.VirtualMachine.reconfigure: vim.fault.GenericVmConfigFault: Reboot the ESXi host. For more information, see VMware knowledge base article 80399 .

Workaround

For each ESXi host in your cluster do the following: Connect to the ESXi host by using SSH and run the command esxcli system module parameters set -a -p dvfiltersMaxFilters=8192 -m dvfilter Put the ESXi host in Maintenance Mode

Knowledge Base URLs

https://kb.vmware.com/s/article/80399

Bug URLs

https://techdocs.broadcom.com/us/en/vmware-cis/vsphere/vsphere/7-0/release-notes/vcenter-server-update-and-patch-release-notes/vsphere-vcenter-server-70u3v-release-notes.html https://techdocs.broadcom.com/us/en/vmware-cis/vsphere/vsphere/7-0/release-notes/vcenter-server-update-and-patch-releases/vsphere-vcenter-server-70u3l-release-notes.html https://techdocs.broadcom.com/us/en/vmware-cis/vsphere/vsphere/7-0/release-notes/vcenter-server-update-and-patch-releases/vsphere-vcenter-server-70u3m-release-notes.html https://techdocs.broadcom.com/us/en/vmware-cis/vsphere/vsphere/7-0/release-notes/vcenter-server-update-and-patch-releases/vsphere-vcenter-server-70u3n-release-notes.html https://techdocs.broadcom.com/us/en/vmware-cis/vsphere/vsphere/7-0/release-notes/vcenter-server-update-and-patch-releases/vsphere-vcenter-server-70u3o-release-notes.html https://techdocs.broadcom.com/us/en/vmware-cis/vsphere/vsphere/7-0/release-notes/vcenter-server-update-and-patch-releases/vsphere-vcenter-server-70u3p-release-notes.html https://techdocs.broadcom.com/us/en/vmware-cis/vsphere/vsphere/7-0/release-notes/vcenter-server-update-and-patch-releases/vsphere-vcenter-server-70u3q-release-notes.html https://techdocs.broadcom.com/us/en/vmware-cis/vsphere/vsphere/7-0/release-notes/vcenter-server-update-and-patch-releases/vsphere-vcenter-server-70u3r-release-notes.html https://techdocs.broadcom.com/us/en/vmware-cis/vsphere/vsphere/7-0/release-notes/vcenter-server-update-and-patch-releases/vsphere-vcenter-server-70u3s-release-notes.html https://techdocs.broadcom.com/us/en/vmware-cis/vsphere/vsphere/7-0/release-notes/vcenter-server-update-and-patch-releases/vsphere-vcenter-server-70u3u-release-notes.html https://techdocs.broadcom.com/us/en/vmware-cis/vsphere/vsphere/7-0/release-notes/vcenter-server-update-and-patch-releases/vsphere-vcenter-server-70u3w-release-notes.html

Relevant Products

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Affected versions:7.0.3.01400, 7.0.3.01500, 7.0.3.01600, 7.0.3.01700, 7.0.3.01800, 7.0.3.01900, 7.0.3.02000, 7.0.3.02100, 7.0.3.02300, 7.0.3.02400, 7.0.3.02500

Fixed versions: No known fixed versions

Relevant Products

Click on a version to see all relevant bugs

Affected versions:7.0.3.01400, 7.0.3.01500, 7.0.3.01600, 7.0.3.01700, 7.0.3.01800, 7.0.3.01900, 7.0.3.02000, 7.0.3.02100, 7.0.3.02300, 7.0.3.02400, 7.0.3.02500

Fixed versions: No known fixed versions

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VMware vCenter - Defect ID: f827851ab16d

You cannot add or modify an existing network adapter on a virtual machine

VMware vCenter - Defect ID: f827851ab16d

You cannot add or modify an existing network adapter on a virtual machine

Last updated on January 19th, 2026

BugZero Risk Score0.0 Coming soon

Bug Details

Disclaimer

Overview

Workaround

Knowledge Base URLs

Bug URLs

Top VMware vCenter Defects

Ready to prevent the next vendor outage?

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