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Copy file name to clipboardExpand all lines: articles/networking/nva-accelerated-connections.md
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# Accelerated connections and NVAs (Limited GA)
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# Accelerated connections on NVAs or other VMs (Limited GA)
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This article helps you understand the **Accelerated Connections** feature. When Accelerated Connections is enabled on the virtual network interface (vNIC) with Accelerated Networking, this feature significantly improves networking efficiency, resulting in enhanced overall performance. This high-performance feature offers industry leading performance in Connections Per Second (CPS) optimization, along with improvements to handling large amounts of simultaneous connections. The feature also improves the number of Total Active Connections for network intensive workloads. Accelerated Connections is configured at the network interface level to allow flexibility to size the performance at vNIC. This especially benefits smaller VM sizes. These benefits are available for Network Virtual Appliances (NVAs) with a large number of connections. To access this feature during limited General Availability (limited GA), use the [sign-up form](https://go.microsoft.com/fwlink/?linkid=2223706).
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This article helps you understand the **Accelerated Connections** feature. When Accelerated Connections is enabled on the virtual network interface (vNIC) with Accelerated Networking, this feature significantly improves networking efficiency, resulting in enhanced overall performance. This high-performance feature offers industry leading performance in Connections Per Second (CPS) optimization, along with improvements to handling large amounts of simultaneous connections. The feature also improves the number of Total Active Connections for network intensive workloads. Accelerated Connections is configured at the network interface level to allow flexibility to size the performance at vNIC. This especially benefits smaller VM sizes. These benefits are available for Network Virtual Appliances (NVAs) as well as Virtual Machines (VMs) with a large number of connections. To access this feature during limited General Availability (limited GA), use the [sign-up form](https://go.microsoft.com/fwlink/?linkid=2223706).
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> [!IMPORTANT]
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> This feature is currently in limited General Availability (GA) and customer sign-up is needed to use it.
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There are a total of four performance tiers at vNIC level which gives the flexibility to control the networking capability. All tiers have different networking capabilities. Instructions on how to select performance tier based on VM sizes will be provided after a customer sign up for the feature.
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Accelerated Connections is implemented at the network interface level to allow maximum flexibility of network capacity. Multiple vNICs can be configured with this enhancement, the number depends on the supported VM family. Network Virtual Appliances (NVAs) on Azure Marketplace will be the first workloads to be offered this ground-breaking feature.
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Accelerated Connections is implemented at the network interface level to allow maximum flexibility of network capacity. Multiple vNICs can be configured with this enhancement, the number depends on the supported VM family. VM families up to v4 will be the first workloads to be offered this ground-breaking feature.
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Network Virtual Appliances (NVAs) with the largest scale workloads requiring virtual firewalls, virtual switches, load balancers and other critical network features, as well as Virtual Machines (VMs) with high connection workloads will experience dramatically improved CPS performance with Accelerated Connections.
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Network Virtual Appliances (NVAs) with the largest scale workloads requiring virtual firewalls, virtual switches, load balancers and other critical network features will experience dramatically improved CPS performance with Accelerated Connections.
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> [!NOTE]
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> During limited GA, this feature is only supported for NVAs available on the [Azure Marketplace](https://azuremarketplace.microsoft.com/marketplace/apps?search=network%20virtual%20appliance&page=1&filters=virtual-machine-images%3Bpartners).
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**Architecture diagram**
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### Considerations and limitations
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* This feature is available only for NVAs deployed from Azure Marketplace during limited GA.
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* This feature is available for NVAs deployed from Azure Marketplace and Azure Virtual Machines during limited GA.
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* To enable this feature, you must sign up using the [sign-up form](https://go.microsoft.com/fwlink/?linkid=2223706).
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* This feature can be enabled and is supported only on new deployments.
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* Feature support may vary as per the NVAs available on Marketplace.
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