HP StorageWorks 8B - FC Entry Switch Podręcznik użytkownika - Strona 9

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HP StorageWorks 8B - FC Entry Switch Podręcznik użytkownika

Introducing QuickLoop

This chapter provides the following information:
•

Overview

•

QuickLoop Basics

•
Address Translation
•
Combining QuickLoop and Zoning
Overview
QuickLoop allows arbitrated loops to be attached to a fabric. Without modifying their drivers,
private target on the arbitrated loops can be accessed by public or private hosts elsewhere on the
fabric.
Devices attached to QuickLoop communicate with all other devices attached to the same
QuickLoop. However, private devices attached to QuickLoop communicate only with devices
within the same QuickLoop. Public devices in an arbitrated loop mode are considered private
devices when connected to QuickLoop ports.
Zoning enables the set of storage devices visible to specific hosts can be carefully administered.
The QuickLoop and Zoning combination allows a private host to fully participate in a Storage Area
Network (SAN).
QuickLoop Basics
QuickLoop is a unique Fibre Channel topology that combines arbitrated loop and fabric topologies.
An arbitrated loop supports communication between devices that are not fabric-aware. Such
devices are called private devices, and arbitrated loops are sometimes called private loops.
QuickLoop allows an FC Entry Switch 8B, FC Switch 8B, or FC 16B switch to emulate a hub
environment, while offering the additional benefit of connectivity to a fabric.
A QuickLoop consists of multiple private arbitrated looplets (a set of devices connected to a single
port) that are connected by a fabric. All devices in a QuickLoop share a single AL_PA bit-map and
behave as if they are in one loop. This allows private devices to communicate with other devices
over the fabric, provided they are in the same QuickLoop.
A particular QuickLoop can be configured to consist of selected devices or looplets connected to
the ports of one switch, or to a cascaded switch pair.
QuickLoop User's Guide
on
page 1-1
on
page 1-1
on
page 1-2
on
page 1-2
Chapter
1
1-1