IBM SAN16B-2 User Guide - Page 76

Fibre Channel transport. A protocol service that supports communication between Fibre Channel service providers. See also Fibre Channel service protocol. field replaceable unit (FRU). An assembly that is replaced in its entirety by a service representative when any one of its components fails. In some cases, a field replaceable unit can contain other field replaceable units. File Transfer protocol (FTP). In Transmission Control protocol/Internet protocol (TCP/IP), an application protocol used for transferring files to and from host computers. fill word. An IDLE or ARB ordered set that is transmitted during breaks between data frames to keep the Fibre Channel link active. firmware. The basic operating system provided with the hardware. FLA. Fabric loop attach. flash partition. Two redundant usable areas, called partitions into which firmware can be downloaded in the director/switch. FLOGI. See fabric login. FL_port. See fabric loop port. F_port. See fabric port. frame. The Fibre Channel structure used to transmit data between ports. Consists of a start-of-frame delimiter, header, any optional headers, the data payload, a cyclic redundancy check (CRC), and an end-of-frame delimiter. There are two types of frames: link control frames (transmission acknowledgements, and so on) and data frames. frame delimiter. A part of an ordered set that marks frame boundaries and describes frame contents. See also ordered set. FRU. See field replaceable unit. FS. See Fibre Channel service. FSP. See Fibre Channel service protocol. FSPF. See Fibre Channel shortest path first. FTP. See File Transfer protocol. full duplex. A mode of communication that allows the same port to simultaneously transmit and receive frames. See also half duplex. Fx_port. A fabric port that can operate as either a fabric port (F_port) or fabric loop port (FL_port). See also fabric port and fabric loop port. G gateway. Hardware that connects incompatible networks by providing the necessary translation for both hardware and software. GBIC. See gigabit interface converter. Gbps. Gigabits per second. GBps. Gigabytes per second. generic port (G_port). A generic port that can operate as either an expansion port (E_port) or a fabric port (F_port). A port is defined as a G_port when it is not yet connected or has not yet assumed a specific function in the fabric. gigabit interface converter (GBIC). A removable serial transceiver module designed to provide gigabaud capability for fibre channel (FC) and other products that use the same physical layer. G_port. See generic port. H HA. See high availability. half duplex. A mode of communication that allows a port to either transmit or receive frames at any time, but not simultaneously (with the exception of link control frames, which can be transmitted at any time). See also full duplex. hard address. The arbitrated loop physical address (AL_PA) that a node loop port (NL_port) attempts to acquire during loop initialization. hardware translative mode. Method for achieving address translation. The two hardware translative modes that are available to a QuickLoop-enabled switch are standard translative mode and QuickLoop mode. See also standard translative mode and QuickLoop mode. HBA. See host bus adapter. high availability. An attribute of equipment that identifies it as being capable of operating well in excess of 99 percent of the time. High Availability is typically identified by the number of nines in that percentage. For example, a switch that is rated at five nines would be capable of operating 99.999 percent of the time without failure. host. A computer that is connected to a network and provides an access point to that network. The host can be a client, a server, or both a client and server simultaneously. 54 SAN16B-2 Installation, Service, and User's Guide