Which of the following FCoE switch port types is typically connected to a VN port?
- another VN port
- a VF port
- a SPAN port
- a VE port
A Fibre Channel over Ethernet (FCoE) virtual fabric (VF) interface port type is typically connected to a virtual node (VN) port. FCoE is used in data centers to encapsulate Fibre Channel (FC) over an Ethernet network. This encapsulation enables the FC protocol to communicate over 10 gigabit-per-second (Gbps) Ethernet. There are two types of FCoE switch ports: a VF port and a virtual edge (VE) port.
An FCoE VF port typically connects to an end host. A VN port is a port on an end host, such as a host bus adapter (HBA) port. If the end host is connected to an Ethernet network that is configured with virtual local area networks (VLANs), the Spanning Tree Protocol (STP) configuration on the Ethernet fabric might require extra attention, especially if the Ethernet fabric is not using Per-VLAN Spanning Tree Plus (PVST+). A proper STP configuration on the Ethernet fabric prevents the Ethernet topology from affecting storage area network (SAN) traffic.
An FCoE VE port typically connects to a port on another FC forwarder (FCF). STP does not operate on VE ports, because these ports typically connect two FCFs. FC does not require switching loop prevention, because FCFs have no concept of switching loops. VE ports typically default to trunk mode.
A switched port analyzer (SPAN) port, which is also known as a mirroring port, is a type of port that is used to collect copies of packets transmitted over another port, over a given device, or over a network. In an FCoE configuration, a SPAN destination port can be either an FC interface or an Ethernet interface. SPAN source ports, on the other hand, can be FC interfaces, virtual FC (vFC) interfaces, a virtual SAN (vSAN), a VLAN, an Ethernet interface, a port channel interface, or a SAN port channel interface.