The Cisco UCS M81KR Virtual Interface Card is a virtualization-optimized Fibre Channel over Ethernet (FCoE) adapter card. The virtual interface card is a dual-port 10 Gigabit Ethernet adapter card that supports up to 128 Peripheral Component Interconnect Express (PCIe) standards-compliant virtual interfaces that can be dynamically configured so that both their interface type (network interface card [NIC] or host bus adapter [HBA]) and identity (MAC address and worldwide name [WWNN]) are established using just-in-time provisioning. In addition, the Cisco UCS M81KR supports network interface virtualization and Cisco VN-Link technology.
The Cisco UCS M81KR is designed for both traditional operating system and virtualization environments. It is optimized for virtualized environments, for organizations that seek increased mobility in their physical environments, and for data centers that want reduced TCO through NIC, HBA, cabling, and switch reduction.
The Cisco UCS M81KR presents up to 128 virtual interfaces to the operating system on a given blade. The 128 virtual interfaces can be dynamically configured by Cisco UCS Manager as either Fibre Channel or Ethernet devices. Deployment of applications using multiple Ethernet and Fibre Channel interfaces is no longer constrained by the available physical adapters. To an operating system or a hypervisor running on a Cisco UCS B-Series Blade Server, the virtual interfaces appear as regular PCIe devices.
The Cisco UCS M81KR has built-in architectural support enabling the virtual machine to directly access the adapter. I/O bottlenecks and memory performance can be improved by providing virtual machines direct access to hardware I/O devices, eliminating the overhead of embedded software switches.
The Cisco UCS M81KR also brings adapter consolidation to physical environments. The adapter can be defined as multiple different NICs and HBAs. For example, one adapter card can replace two quad-port NICs and two single-port HBAs, resulting in fewer NICs, HBAs, switches, and cables.