Fibre Channel (FC) is a data transmission protocol used in a storage area network (SAN). To enable FC/FCoE switch mode on Cisco Nexus 9000 series switches, you must configure feature-set fcoe. FC/FCoE configuration does not support rollback. The fabric is a network of Fibre Channel devices which allows. This guide describes supported FC-NVMe, FC, and iSCSI topologies for connecting host computers to nodes, and lists supported limits for SAN components. When a node is connected to the FC SAN, each SVM registers the World Wide Port Name (WWPN) of its LIF with the switch Fabric Name Service.