Posts Tagged ‘SR-IOV’

Enable Azure Accelerated Networking

Azure Accelerated Networking is a new option for Azure Infrastructure as a Service (IaaS) Virtual Machine (VM) on the NIC level providing several benefits by enabling single root I/O virtualization (SR-IOV) to a VM, greatly improving its networking performance. This high-performance path bypasses the host from the datapath, reducing latency, jitter, and CPU utilization, for use with the most demanding network workloads on supported VM types. You would typically use this feature with heavy workloads that need to send or receive data at high speed with reliable streaming and lower CPU utilization. It will enable speeds of up to 25Gbps per Virtual Machine. Best of all, it’s free!

accelerated-networking

How to Enable Accelerated Networking:

You can enable this feature during initial creation of the VM, on the networking tab, you will see “Enable Accelerated Networking”. If you are unable to enable, then it is not compatible on your chosen Azure VM size. If you need to enable this feature after VM creation you will require to do so through powershell as it is not yet supported in the portal. You can do this simply with the below commands after deallocating the Virtual Machine.


Login-AzureRmAccount
$nic = Get-AzureRmNetworkInterface -ResourceGroupName “YourResourceGroupName” -Name “YourNicName”
$nic.EnableAcceleratedNetworking = $true
$nic | Set-AzureRmNetworkInterface

Then proceed to start the Virtual Machine and Accelerated Networking will be enabled.