Cisco UCS VIC driver ISO bundles include an eNIC driver and an fNIC driver, where eNIC is the driver for the Cisco UCS VIC Ethernet NIC and fNIC is the driver for the Cisco UCS VIC Fibre Channel over ...Cisco UCS VIC driver ISO bundles include an eNIC driver and an fNIC driver, where eNIC is the driver for the Cisco UCS VIC Ethernet NIC and fNIC is the driver for the Cisco UCS VIC Fibre Channel over Ethernet HBA. Fiber Channel NIC, also referred to as fNIC, is used by the ESX or Linux flavor of operating systems to communicate with the physical HBA card installed on the server. The fNIC driver enables FCoE support for the Cisco UCS Virtual Interface Card family of products.