McDATA 316095-B21 - StorageWorks Edge Switch 2/24 Installation And Service Manual page 576

Glossary
logical partition
logical port address
logical switch number
logical unit number
login server
longwave
loopback plug
loopback test
MAC address
g-32 McDATA® Sphereon 3032 and 3232 Fabric Switches Installation and Service Manual
LPAR. A processor hardware subset defined to support the operation
of a system control program, and can be used without affecting any of
the applications in another partition (D).
In a director or switch, the address used to specify port connectivity
parameters and to assign link addresses for the attached channels
and control units.
LSN. A two-digit number used by the I/O configuration program
(IOCP) to identify a director or switch (D).
LUN. In Fibre Channel addressing, a logical unit number is a number
assigned to a storage device which, in combination with the storage
device's node port's world-wide name, represents a unique identifier
for a logical device on a storage area network. Peripherals use LUNs
to represent addresses. A small computer system interface (SCSI)
device's address can have up to eight LUNs.
Entity within the Fibre Channel fabric that receives and responds to
login requests.
Lasers or light-emitting diodes (LEDs) that emit light with wave-
lengths around 1300 nm. When using single mode (9 nm) fiber, long-
wave lasers can be used to achieve lengths greater than 2 Km.
In a fiber optic environment, a type of duplex connector used to wrap
the optical output signal of a device directly to the optical input. Con-
trast with protective
Test that checks attachment or control unit circuitry, without checking
the mechanism itself, by returning the output of the mechanism as
input.
LPAR See logical partition.
LSN See logical switch
LUN
See logical unit
M
See media access control
plug. Synonymous with
number.
number.
address.
wrap plug.