A virtualized server implementation consists of one or more VMs running as 'guests' on a single physical server. The guest VMs are hosted and managed by a software layer called the hypervisor or virtual machine manager (VMM). The hypervisor typically presents a virtual network interface to each VM and performs Layer 2 switching of traffic from a VM to other local VMs or to a physical interface to the external network. Working with a Cisco virtual interface card (VIC) adapter, Cisco Virtual Machine Fabric Extender (VM-FEX)bypasses software-based switching of VM traffic by the hypervisor in favor of external hardware-based switching in the fabric interconnect. This method results in a reduced load on the server CPU, faster switching,and the ability to apply a rich set of network management features to local and remote traffic. VM-FEX extends the (prestandard) IEEE 802.1Qbh port extender architecture to the VMs, providing each VM interface with a virtual Peripheral Component Interconnect Express (PCIe) device and a virtual port ona switch. This solution allows precise rate limiting and quality of service (QoS) guarantees on the VM interface.
The host must be managed by Cisco UCS Manager Release 2.1 or later.
The host operating system must be an edition of Windows Server 2012 or later that includes Hyper-V support. For more information about installing Microsoft Hyper-V, see the Microsoft Windows Server documentation.
In the host BIOS Processor settings, you must enable Virtualization Technology (VT) and Direct Cache Access.
In the host BIOS Intel Directed I/O settings, you must enable VT For Directed I/O and Interrupt Remap.
For more information about configuring UCS server BIOS settings, see the Cisco UCS Manager GUI Configuration Guide.
HTTPS communication must be enabled on the Cisco UCS Manager. For more information about enabling HTTPS communication, see the Cisco UCS Manager GUI Configuration Guide.
One or more Cisco VIC adapters must be installed in the host. For more information about installing a Cisco VIC adapter, see the Cisco UCS 5108 Server Chassis Hardware Installation Guide.
An SR-IOV PF cannot be used as an iSCSI vNIC. An existing iSCSI vNIC cannot be defined as a PF.
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