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ELP. Extended link parameters.
ELWL. See extra long wavelength.
EMC. See electromagnetic compatibility.
EMI. See electromagnetic interference.
enabled zone configuration. The currently enabled
configuration of zones. Only one configuration can be
enabled at a time. See also defined zone configuration
and zone configuration.
end port. A port on an edge switch that connects a
device to the fabric.
end-to-end credit (EE_credit). The number of receive
buffers allocated by a recipient port to an originating
port. Used by class 1 and class 2 services to manage
the exchange of frames across the fabric between
source and destination. See also end-to-end flow control
and buffer-to-buffer credit.
end-to-end flow control. Governs flow of class 1 and
class 2 frames between node ports (N_ports). See also
end-to-end credit.
E_port. See expansion port.
error. As applies to fibre channel, a missing or
corrupted frame, timeout, loss of synchronization, or
loss of signal (link errors). See also loop failure.
error detect timeout value (E_D_TOV). The time that
the switch waits for an expected response before
declaring an error condition. Adjustable in 1
microsecond increments from 2—10 seconds.
ESD. See electrostatic discharge.
exchange. The highest level Fibre Channel
mechanism used for communication between node
ports (N_ports). Composed of one or more related
sequences, and can work in either one or both
directions.
expansion port (E_port). A port is designated an
expansion port (E_port) when it is used as an
inter-switch expansion port to connect to the E_port of
another switch, to build a larger switch fabric.
Extended Fabrics. A feature that runs on Fabric
operating system (OS) and allows creation of a Fibre
Channel fabric interconnected over distances of up to
100 km (62.14 mi).
extra long wavelength (ELWL). Laser light with a
periodic length greater than 1300 nm (for example,
1420 or 1550). ELWL lasers are used to transmit Fibre
Channel data over distances greater than 10 km. Also
known as XLWL.
F
fabric. A network that uses high-speed fibre
connections to connect switches, hosts, and devices. A
fabric is an active, intelligent, nonshared interconnect
scheme for nodes.
Fabric Access. Allows the application to control the
fabric directly for functions such as discovery, access
(zoning) management, performance, and switch control.
Consists of a host-based library that interfaces the
application to switches in the fabric over an out-of-band
TCP/IP connection or in-band using an IP-capable host
bus adapter (HBA).
Fabric Assist. A feature that enables private and
public hosts to access public targets anywhere on the
fabric, provided they are in the same Fabric Assist zone.
fabric configuration server (FCS) switch. One or
more designated switches that store and manage the
configuration and security parameters for all switches in
the fabric. FCS switches are designated by worldwide
name (WWN), and the list of designated switches is
communicated fabric-wide. See also backup FCS
switch, primary FCS switch.
fabric login (FLOGI). The process by which a device
gains access to the fabric.
fabric loop port (FL_port). A fabric port that is loop
capable. Used to connect node loop ports (NL_ports) to
the switch in a loop configuration.
Fabric Manager. A feature that allows the storage
area network (SAN) manager to monitor key fabric and
switch elements, making it easy to quickly identify and
escalate potential problems. It monitors each element
for out-of-boundary values or counters and provides
notification when defined boundaries are exceeded. The
SAN manager can configure which elements, such as
error, status, and performance counters, are monitored
within a switch.
fabric mode. One of the modes for a loop port
(L_port). An L_port is in fabric mode when it is
connected to a port that is not loop capable and is using
fabric protocol. See also loop port and loop mode.
fabric name. The unique identifier assigned to a fabric
and communicated during login and port discovery.
Fabric OS. An operating system made up of two
software components: the firmware that initializes and
manages the switch hardware, and diagnostics.
fabric port (F_port). A port that is able to transmit
under fabric protocol and interface over links. Can be
used to connect a node port (N_port) to a switch. See
also fabric loop port and Fx_port.
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Glossary
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