HP StorageWorks 8B - FC Entry Switch User manual

user's guide
version 3.0
quickloop
www.hp.com

Notice
© Hewlett-Packard Company, 2001. All rights reserved.
Edition: E1201
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QuickLoop User’s Guide iii
Contents
Preface
About This Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Related Publications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
System Requirements and Compatibility. . . . . . . . . . . . . . . . . . . . . . . . vii
Getting Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Getting Software Updates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Chapter 1 Introducing QuickLoop
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
QuickLoop Basics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Address Translation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Combining QuickLoop and Zoning . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Chapter 2 Using QuickLoop
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Administering QuickLoop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Web Tools. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Telnet Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
QuickLoop Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
QuickLoop Implementation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Dual-switch QuickLoop . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
QuickLoop Initialization. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

iv QuickLoop User’s Guide
Sample Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Configuration 1: Emulating a Hub . . . . . . . . . . . . . . . . . . . . 2-7
Configuration 2: Dual-switch QuickLoop . . . . . . . . . . . . . . 2-8
Configuration 3: Long Wave Laser Connection. . . . . . . . . . 2-9
Configuration 4: Mixed QuickLoop Mode and Fabric Mode 2-10
Error Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Switch Level Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Port Level Errors. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Glossary
Index

QuickLoop User’s Guide v
Preface
Zoning is a standard feature on the HP Surestore FC 1Gb/2Gb Switch 8B and FC 1Gb/2Gb Switch
16B products. It is also available on the HP Surestore FC 1Gb/2Gb Entry Switch 8B if the Zoning
license is installed. QuickLoop is a standard feature on the HP Surestore FC 1Gb/2Gb Entry Switch
8B, FC 1Gb/2Gb Switch 8B, and FC 1Gb/2Gb Switch 16B products. QuickLoop and Zoning are
supported on switches running Fabric OS version 3.0.1b or later.
About This Guide
This guide provides the following information about the QuickLoop features:
Related Publications
Related product information can be found in the following publications.
Provided with the FC Entry Switch 8B and FC Switch 8B:
•HP Surestore FC 1Gb/2Gb Entry Switch 8B and FC 1Gb/2Gb Switch 8B Getting Started
Guide (A7346-90902)
•HP Surestore FC 1Gb/2Gb Entry Switch 8B and FC 1Gb/2Gb Switch 8B Documentation
CD (A7346-11001)
Chapter 1
Introducing QuickLoop Provides an overview of QuickLoop.
Chapter 2
Using QuickLoop Provides information about configuring and using QuickLoop.

vi QuickLoop User’s Guide
Provided on the FC Entry Switch 8B and FC Switch 8B Documentation CD, and at the HP Web site
at http://www.hp.com/support/fc8B:
•HP Surestore FC 1Gb/2Gb Entry Switch 8B and FC 1Gb/2Gb Switch 8B Getting Started
Guide (A7346-90902)
•HP Surestore FC 1Gb/2Gb Entry Switch 8B and FC 1Gb/2Gb Switch 8B Installation and
Reference Guide
•Fabric OS Reference Manual, version 3.0
•Fabric OS Procedures Guide, version 3.0
•Fabric OS Version 3.0.1b Release Notes
•Fabric Watch User’s Guide, version 3.0
•QuickLoop User’s Guide, version 3.0
•Web Tools User’s Guide, version 3.0
•Distributed Fabrics User’s Guide, version 3.0
•Zoning User’s Guide, version 3.0
•MIB Reference Manual, version 3.0
•ISL Trunking User’s Guide, version 3.0
•Advanced Performance Monitoring User’s Guide, version 3.0
•Merging Heterogeneous Fabrics Instructions
Provided with the FC 16B:
•HP Surestore FC 1Gb/2Gb Switch 16B Quick Start Guide (A7340-96002)
•HP Surestore FC 1Gb/2Gb Switch 16B Documentation CD (A7340-11001)
Provided on the FC 1Gb/2Gb Switch 16B Documentation CD and at the HP Web site at
http://www.hp.com/support/fc16B:
•HP Surestore FC 1Gb/2Gb Switch 16B Quick Start Guide (A7340-96002)
•HP Surestore FC 1Gb/2Gb Switch 16B Installation and Reference Guide
•Fabric OS Reference Manual, version 3.0
•Fabric OS Procedures Guide, version 3.0
•Fabric OS Version 3.0.1 Release Notes
•Fabric Watch User’s Guide, version 3.0
•QuickLoop User’s Guide, version 3.0
•Web Tools User’s Guide, version 3.0
•Distributed Fabrics User’s Guide, version 3.0
•Zoning User’s Guide, version 3.0
•MIB Reference Manual, version 3.0
•ISL Trunking User’s Guide, version 3.0
•Advanced Performance Monitoring User’s Guide, version 3.0
•Merging Heterogeneous Fabrics Instructions
Information about Fibre Channel standards and Fibre Channel in general can be found on the Fibre
Channel Industry Association Web site, located at http://www.fibrechannel.com.

QuickLoop User’s Guide vii
System Requirements and Compatibility
Compatibility with other Products
Fabric OS version 3.0.1b or later can be installed and run on the FC Entry Switch 8B, FC Switch
8B, and FC 16B products.
The FC Entry Switch 8B, FC Switch 8B, and the FC 16B switch running Fabric OS version 3.0.1b
or later can operate in the same fabric with the HP Brocade 2400/2800 and FC 6164 switches
running the a2.4.1 or later versions of Fabric OS.
For more information about configuring FC Entry Switch 8B, FC Switch 8B, FC 16B, HP Brocade
2400/2800, and FC 6164 products to operate in the same fabric, contact your switch supplier.
Getting Help
For information for the FC Entry Switch 8B and FC Switch 8B, visit the HP Web site at
http://www.hp.com/support/fc8B.For the most current technical support information for the FC
16B, visit the HP Web site at http://www.hp.com/support/fc16B. This includes hardware and
software support, all repairs, and spare components.
Be prepared to provide the following information to the support personnel:
•Switch serial number
•Switch world wide name
•Output from the supportShow telnet command
•Detailed description of the problem
•Topology configuration
•Troubleshooting steps already performed
Getting Software Updates
For information on obtaining software updates contact your HP account representative or technical
support.

viii QuickLoop User’s Guide

QuickLoop User’s Guide 1-1
Chapter
1
Introducing QuickLoop
This chapter provides the following information:
•Overview on page 1-1
•QuickLoop Basics on page 1-1
•Address Translation on page 1-2
•Combining QuickLoop and Zoning on page 1-2
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.

1-2 QuickLoop User’s Guide
Introducing QuickLoop
1
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. Standard
translative mode is available as an integral part of Fabric OS, and does not require QuickLoop.
•QuickLoop mode
Allows private hosts to communicate with private target devices across the fabric when
configured in the same QuickLoop. Also allows private host to communicate with public target
in the same QuickLoop.
In mixed mode individual ports within a switch are set by configuration commands to one of the
above two modes.
The switch automatically determines and sets the appropriate mode, based on factory defaults and
configurations currently in effect.
Combining QuickLoop and Zoning
QuickLoop can be used in conjunction with Zoning.
In addition to zoning fabrics, QuickLoop Zoning also 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.
Fabric zones and QuickLoop zones are independent of each other; both types of zones can co-exist
in the same zone configuration. Hosts in a QuickLoop can see only targets contained within a
QuickLoop.
Zoning adds the following features:
•Devices from multiple QuickLoops can be added to the definition for a fabric zone.
Even an identical AL_PA from two different QuickLoops could be configured under a fabric
zone. Zoning can correctly direct traffic to the different devices.
•Additional control over access to QuickLoop devices.
Fabric devices in a zoned fabric can only access the QuickLoop (and fabric) devices that are in
the same zone.