HP Surestore 6164 QuickLoop User's Guide - Page 12

Address Translation, Combining QuickLoop and Zoning

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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 provides a possible migration path starting with deploying a single private loop and later deploying a fabric-based SAN. In this scenario, QuickLoop-enabled switches can be used to replace hubs when the SAN is first deployed and has only private devices attached. Then, as the SAN grows, fabric switches can be added without any detrimental effect to the QuickLoop-enabled switches. Address Translation Address translation is transparent and requires no actions on the part of the user. It is achieved through hardware translative mode (also known as phantom mode), in which a device not physically located in a looplet is made addressable by a unique AL_PA in that looplet. There are two hardware translative modes available to a QuickLoop-enabled switch: • Standard translative mode - Allows public hosts to communicate with private target devices across the fabric. • QuickLoop mode - Allows private hosts to communicate with private target devices across the fabric, provided they are configured in the same QuickLoop. In mixed mode individual ports within a switch are set by configuration commands to one of the above three modes.The switch automatically determines and sets the appropriate mode, based on factory defaults and configurations currently in effect. Combining QuickLoop and Zoning You can use QuickLoop in conjunction with Zoning. In addition to zoning fabrics, Zoning allows you to zone QuickLoops, enhancing management of a Fibre Channel Arbitrated Loop (FC-AL) in a legacy environment.In QuickLoop zoning, devices within a QuickLoop can be partitioned off within that QuickLoop to form QuickLoop zones; in other words, a QuickLoop zone is a subset of QuickLoop and can include only devices in QuickLoop. 12 QuickLoop User's Guide

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12
QuickLoop User’s Guide
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 provides a possible migration path starting with deploying a
single private loop and later deploying a fabric-based SAN. In this scenario,
QuickLoop-enabled switches can be used to replace hubs when the SAN is
first deployed and has only private devices attached. Then, as the SAN
grows, fabric switches can be added without any detrimental effect to the
QuickLoop-enabled switches.
Address Translation
Address translation is transparent and requires no actions on the part of the
user. It is achieved through hardware translative mode (also known as
phantom mode), in which a device not physically located in a looplet is
made addressable by a unique AL_PA in that looplet. There are two
hardware translative modes available to a QuickLoop-enabled switch:
•
Standard translative mode
- Allows public hosts to communicate with
private target devices across the fabric.
•
QuickLoop mode
- Allows private hosts to communicate with private
target devices across the fabric, provided they are configured in the
same QuickLoop.
In mixed mode individual ports within a switch are set by configuration
commands to one of the above three modes.The switch automatically
determines and sets the appropriate mode, based on factory defaults and
configurations currently in effect.
Combining QuickLoop and Zoning
You can use QuickLoop in conjunction with Zoning. In addition to zoning
fabrics, Zoning allows you to zone QuickLoops, enhancing management of
a Fibre Channel Arbitrated Loop (FC-AL) in a legacy environment.In
QuickLoop zoning, devices within a QuickLoop can be partitioned off
within that QuickLoop to form QuickLoop zones; in other words, a
QuickLoop zone is a subset of QuickLoop and can include only devices in
QuickLoop.