IBM F16 User Manual Download

Page: 107 / 123

field replaceable unit (FRU).

An assembly that is

replaced in its entirety 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.

FLA.

Fabric loop attach.

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

gateway.

Hardware that connects incompatible

networks by providing the necessary translation for both
hardware and software.

GBIC.

See

gigabit interface converter

GBps.

Gigabytes per second.

Gbps.

Gigabits 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.

gigabit switch.

A 16-port, Fibre Channel gigabit

switch.

G_port.

See

generic port

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 the switch 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 bus adapter (HBA).

The interface card between

a server or workstation bus and the Fibre Channel
network.

hot pluggable.

A field replaceable unit (FRU)

capability that indicates it can be extracted or installed
while customer data is otherwise flowing in the chassis.

hub.

A Fibre Channel wiring concentrator that

collapses a loop topology into a physical star topology.
Nodes are automatically added to the loop when active
and removed when inactive.

IC bus.

A serial, 2-wire bus used to monitor field

replaceable unit (FRU) temperatures and control the
system including blade power control.