HP StorageWorks 2/8-EL quickloop fabric assist version 3.0.x user guide - Page 22

QuickLoop Implementation, Terminology, N_port

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Using Quick Loop ■ Multiple devices communicate simultaneously between at least 4 separate switch ports, at full bandwidth within multiple looplets located in the same QuickLoop. These simultaneous conversations cannot involve overlapping looplets. ■ If a looplet error is detected, QuickLoop automatically takes that looplet out of service. If the error condition is cleared, the looplet is automatically reinstated. QuickLoop Implementation QuickLoop is implemented by a combination of hardware and software components and requires no actions on the part of the user once it is installed and configured. The hardware components are responsible for the transport of frames among looplets and across switches, and the software components are responsible for QuickLoop initialization and error handling. Terminology The terms and concepts introduced in this section are fundamental to understanding the use of QuickLoop mode with switches. Refer to the Glossary for aditional terms. N_port NL_port Note: The following two port types are on host or storage devices, not on switches. (Node port) An equipment port that is not loop capable. Used to connect the equipment to the fabric. An equipment port that is loop capable. Used to connect an equipment port to the fabric in a loop configuration through the FL_Port on a switch. There are 8, 16 or 32 physical ports on varying models of a Compaq StorageWorks Fibre Channel SAN Switch; certain models constrain the type of port the switch can support. Each port can be independently configured as one of the following types. 22 Quickloop Fabric Assist User Guide

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Using Quick Loop
22
Quickloop Fabric Assist User Guide
■
Multiple devices communicate simultaneously between at least 4 separate
switch ports, at full bandwidth within multiple looplets located in the same
QuickLoop. These simultaneous conversations cannot involve overlapping
looplets.
■
If a looplet error is detected, QuickLoop automatically takes that looplet out
of service. If the error condition is cleared, the looplet is automatically
reinstated.
QuickLoop Implementation
QuickLoop is implemented by a combination of hardware and software
components and requires no actions on the part of the user once it is installed and
configured. The hardware components are responsible for the transport of frames
among looplets and across switches, and the software components are responsible
for QuickLoop initialization and error handling.
Terminology
The terms and concepts introduced in this section are fundamental to
understanding the use of QuickLoop mode with switches. Refer to the Glossary
for aditional terms.
Note:
The following two port types are on host or storage devices, not on switches.
N_port
(Node port) An equipment port that is not loop capable. Used to connect the
equipment to the fabric.
NL_port
An equipment port that is loop capable. Used to connect an equipment port to the
fabric in a loop configuration through the FL_Port on a switch.
There are 8, 16 or 32 physical ports on varying models of a Compaq
StorageWorks Fibre Channel SAN Switch; certain models constrain the type of
port the switch can support. Each port can be independently configured as one of
the following types.