HP 316095-B21 - StorageWorks Edge Switch 2/24 Manual page 17

link incident log
Log, displayed through the Product Manager application, that provides a history of Fibre
Channel link incidents (with associated port numbers) for an individual director or switch. See
also audit log, event
load balancing
Ability to evenly distribute traffic over multiple interswitch links within a fabric. Load
balancing on HP directors takes place automatically.
logical port address
The port numbering system for a director with the FICON Management Server active.
logical unit number
(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.
loop initialization primitive
(LIP) — In an arbitrated loop device, a process by which devices connected to hub ports
(H_Ports) on the arbitrated loop device notify other devices and the switch of their presence in
the loop by sending LIP sequences and subsequent frames through the loop. This process allows
linked arbitrated loop devices to perform fabric loop port (FL_Port) arbitration as they link
through hub ports.
loopback plug
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.
loopback test
Test that checks attachment or control unit circuitry, without checking the mechanism itself, by
returning the output of the mechanism as input.
LUN
See logical unit number.
MAC address
See Media Access Control
maintenance analysis procedure
(MAP) — A set of procedures that guide maintenance personnel through step-by-step
instructions for hardware fault isolation, repair, and verification.
maintenance port
Connector on the director where a PC running an ASCII terminal emulator can be attached or a
dial-up connection can be made for specialized maintenance support.
Directors and Edge Switches Glossary
log, hardware log, and
address.
threshold alert log.
Glossary
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