vSRX 3.0 supports the Azure Accelerated Networking (AAN) feature. AAN utilizes the Mellanox single-root I/O virtualization (SR-IOV) virtual function for high-speed networking.
Microsoft Azure uses Mellanox ConnectX-3, ConnectX-4, and ConnectX-5 NICs to support AAN.
However, vSRX 3.0 supports only ConnectX-4 and ConnectX-5 AAN.