Call HostNetworkSystem.UpdateNetworkConfig For Object NetworkSystem On vCenter Server Failed

When trying to remove a vSwitch in VMware ESXi 5, you may get this error: Call hostnetworksystem.updatenetworkconfig for object <object name> networksystem on vCenter server <vCenter server name> failed This error is basically saying that the vSwitch cannot be removed because it’s in use. Under Configuration -> Networking, you should be able to see if any […]
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Hidden Configuration Options In VMware ESXi

Recently I was having trouble installing Hyper-V on a VMware VM, when I stumbled upon a plethora of hidden configuration options available to change settings on VMware VMs. These hidden settings are applied to a VM via editing the VMX file thusly: snapshot.maxSnapshots = Control the maximum number of VMware snapshots monitor_control.restrict_backdoor = Run virtual […]
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How To Restart VMware Managment Agents

To restart VMware management agents, log onto the console of the ESXi server and go into Troubleshooting Options, then go into Restart Management Agents and hit OK. Restarting VMware management agents is useful if the ESXi server cannot be managed from the vSphere client. If this doesn’t fix your problem you can restart the VMware […]
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Call “HostStorageSystem.ResolveMultipleUnresolvedVmfsVolumes” For Object On vCenter Server Failed

This seems to be a bug in the vSphere Client. When trying to add a missing datastore to VMware ESX 4, if you are unable to remount using the signature and get this error: Call “HostStorageSystem.ResolveMultipleUnresolvedVmfsVolumes” for object on vCenter Server failed Then you might need to do it through the command line to fix […]
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Veeam Backup And Replication Fails After Upgrading ESXi

Your Veeam backups can be working fine and then suddenly start to fail after upgrading ESXi or vSphere. This is because Veeam stores references to ESXi hosts in its SQL database and it thinks that the upgraded VMware ESXi hosts are new servers. It fails to update the Hosts table and gets confused by duplicate […]
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How To Migrate From vSphere 4 to vSphere 5

There are a number of different ways to migrate from vSphere 4 to vSphere 5. You could upgrade vCenter server to vSphere 5 then put your hosts into maintenance mode and upgrade your ESXi hosts to ESXi 5, but it’s almost just as easy to rebuild vSphere from scratch. Plus you get the benefit of having […]
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