HP 316095-B21 - StorageWorks Edge Switch 2/24 Руководство - Страница 25

loop

A loop is a configuration of devices connected to the fabric via a fabric loop port (FL_Port)

interface card.

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.

loop master

In an arbitrated loop device, a reference to the loop master World Wide Name (WWN) field in

the Loop View, the loop master is the arbitrated loop device that is responsible for allocating

arbitrated loop physical addresses (AL-PAs) on the loop. An arbitrated loop device becomes the

loop master through arbitration when there are multiple arbitrated loop devices on the loop. The

arbitrated loop device with the lowest WWN becomes the loop master.

loop port

L_Port. Synonym for

loop switches

Loop switches support node loop port (NL_Port) Fibre Channel protocols. Switches sold as

loop support but upgradeable to fabric switches recounted as loop switches.

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

hub

port.

address.

Glossary