HP 316095-B21 FW 08.01.00 McDATA EFCM Basic User Manual (620-000240-000, Novem - Page 284

Glossary loopback plug loopback test loop initialization primitive loop master loop port loop switches L_Port LUN 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. Contrast with protective plug. Synonymous with wrap plug. Test that checks attachment or control unit circuitry, without checking the mechanism itself, by returning the output of the mechanism as input. 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 the 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. 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. L_Port. Synonym for hub port. 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. Loop port. Synonym for hub port. See logical unit number. M maintenance port Connector on the director or switch where a PC running an American National Standard Code for Information Interchange (ASCII) terminal emulator can be attached or dial-up connection made for specialized maintenance support. g-26 EFCM Basic User Manual