Configure server device hardware for SR-IOV.This post contains the following sections:
A virtual function driver running in the guest operating system manages this device.“Ĭonfiguring SR-IOV in vSphere means configuring a passthrough device (VMDirectPath I/O) for a Virtual Machine, which in turn means a trade-off in other vSphere features for that VM. The virtual function of an SR-IOV capable card can be directly assigned to the guest operating system. The virtual function is enabled in the hardware as a light-weight PCIe function. Devices capable of SR-IOV functionality support multiple virtual functions on top of the physical function. An SR-IOV capable NIC is required in order to provide VNFs with direct access to the physical network card, bypassing the network functionality in the hypervisor.Īs per Dell KB000144029: “ The Single Root I/O Virtualization (SR-IOV) specification details how a single PCIe device can be shared between various guest operating systems. SR-IOV is a common feature required in the Telco space, specifically for use with Virtualised Network Functions (VNFs).
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