Monthly Archives: May 2014

Unable To Live Migrate A Virtual Machine – “There currently are no network adapters with network optimization available on host”

Having moved a virtual machine (VM) from a Hyper-V cluster where network optimization was available, to a cluster where it isn’t I was unable to live migrate the VM because “There currently are no network adapters with network optimization available on host”.

MigrateVM1

As network optimizations aren’t available on the host cluster, the tick box to disable virtual switch optimizations isn’t available.

MigrateVM2

On the original Hyper-V cluster where network optimization is available you can see a check box to “Enable virtual switch optimizations”.

MigrateVM2a

Luckily, PowerShell can help. Running the command below from the SCVMM PowerShell console lists the properties of the VM’s network adapter.

$VM = Get-SCVirtualMachine -Name “VMNAME”
Get-SCVirtualNetworkAdapter -VM $VM

VMNetworkOptimizationEnabled is set to true.

MigrateVM3

You can use PowerShell to disable VM Network Optimization.

$VM = Get-SCVirtualMachine -Name “VMNAME”
$Adapter = Get-SCVirtualNetworkAdapter -VM $VM
Set-SCVirtualNetworkAdapter -VirtualNetworkAdapter $Adapter -EnableVMNetworkOptimization $false

You can now live migrate the VM.

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