HP StorageWorks MSA 2/8 - SAN Switch User Manual
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HP StorageWorks MSA 2/8 - SAN Switch User Manual

HP StorageWorks MSA 2/8 - SAN Switch User Manual

Hp storageworks quickloop fabric assist v3.1.x user guide (aa-rts1b-te, june 2003)
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user guide
hp StorageWorks
quickloop fabric assist
version 3.1.x
Product Version: 3.1.x
Second Edition (June 2003)
Part Number: AA–RTS1B–TE
This guide provides comprehensive information to help you administer your StorageWorks SAN
switch and your Storage Area Network (SAN).
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Summary of Contents for HP StorageWorks MSA 2/8 - SAN Switch

  • Page 1 user guide hp StorageWorks quickloop fabric assist version 3.1.x Product Version: 3.1.x Second Edition (June 2003) Part Number: AA–RTS1B–TE This guide provides comprehensive information to help you administer your StorageWorks SAN switch and your Storage Area Network (SAN).
  • Page 2 © Copyright 1999-2003 Hewlett-Packard Development Company, L.P. Hewlett-Packard Company makes no warranty of any kind with regard to this material, including, but not limited to, the implied warranties of merchantability and fitness for a particular purpose. Hewlett-Packard shall not be liable for errors contained herein or for incidental or consequential damages in connection with the furnishing, performance, or use of this material.

  • Page 3: Table Of Contents

    contents Contents About this Guide........... .5 Overview.
  • Page 4 Contents Pass 2: Full Initialization ..........22 Error Handling .

  • Page 5: About This Guide

    about this guide About this Guide This guide provides comprehensive information to help you administer your StorageWorks SAN switch and your SAN. This guide can be used with the other About this Guide product-related documents or as a standalone document. “About this Guide”...

  • Page 6: Overview

    About this Guide Overview This section covers the following topics: Intended Audience Related Documentation Intended Audience This document was developed to help administrators and technical experts operate, maintain and troubleshoot networked SAN products and are experienced with the following: Networking technologies Fibre Channel technologies SAN environments and technologies Related Documentation...

  • Page 7: Conventions

    About this Guide Conventions Conventions consist of the following: Document Conventions Text Symbols Document Conventions The document conventions included in Table 1 apply in most cases. Table 1: Document Conventions Element Convention Cross-reference links Blue text: Figure 1 Key and field names, menu items, Bold buttons, and dialog box titles Italics...
  • Page 8 About this Guide Note: Text set off in this manner presents commentary, sidelights, or interesting points of information. QuickLoop Fabric Assist Version 3.1.x User Guide...

  • Page 9: Getting Help

    About this Guide Getting Help If you still have a question after reading this guide, contact an HP authorized service provider or access our website: http://www.hp.com. HP Technical Support Telephone numbers for worldwide technical support are listed on the following HP website: http://www.hp.com/support/.
  • Page 10 About this Guide QuickLoop Fabric Assist Version 3.1.x User Guide...

  • Page 11: Introducing Quickloop

    Introducing QuickLoop HP StorageWorks 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 often called private loops. QuickLoop allows a StorageWorks SAN switch to emulate a hub environment, while offering the additional benefit of connectivity to a fabric.

  • Page 12: Quickloop Basics

    Introducing QuickLoop QuickLoop Basics 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.

  • Page 13: License Activation

    Introducing QuickLoop License Activation Always verify that the license is activated when initially using a feature. Use the licenseshow command to view a list of all licenses activated on your switch (see Figure 1). If the license is not included in the list, continue with “License Activation Using Telnet”...

  • Page 14: License Activation Using Web Tools

    Introducing QuickLoop License Activation Using Web Tools Use the following procedure to activate a license using Web Tools: 1. Launch a web browser. 2. Enter the switch name or IP address in the Location/Address section of the browser and press Enter. Advanced Web Tools launches, displaying the Fabric View.

  • Page 15: Using Quickloop

    Using QuickLoop This chapter describes how to use Quickloop. Topics include: QuickLoop Overview, page 16 Address Translation, page 17 Administering QuickLoop, page 18 QuickLoop Topology, page 19 QuickLoop Implementation, page 20 Error Handling, page 23 QuickLoop Fabric Assist Version 3.1.x User Guide...

  • Page 16: Quickloop Overview

    Using QuickLoop QuickLoop Overview QuickLoop can be enabled or disabled on either the entire switch or on individual ports. When QuickLoop is disabled on a port, that port returns to Fabric mode. When QuickLoop is enabled on a port, the port is added to the same QuickLoop to which the switch belongs.

  • Page 17: Address Translation

    Using QuickLoop 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.

  • Page 18: Administering Quickloop

    Using QuickLoop Administering QuickLoop QuickLoop can be managed through telnet commands or Advanced Web Tools. Note: QuickLoop cannot be managed from a switch running Fabric OS v4.1.x and QuickLoops cannot be enabled on a switch running Fabric OS v4.1.x. You can use Advanced Web Tools to view and modify the QuickLoop settings through the QuickLoop Admin tab on the Switch Admin view, available through Advanced Web Tools.

  • Page 19: Quickloop Topology

    Using QuickLoop QuickLoop Topology QuickLoop topologies have the following characteristics: A QuickLoop can include up to two switches and can support up to 126 AL_PA devices. Each particular switch can only be included in one QuickLoop. A QuickLoop can include either all of, or a subset of, the ports on a particular switch.

  • Page 20: Quickloop Implementation

    Using QuickLoop 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. Topics in this section include: Terminology, page 20 Dual-switch QuickLoop, page 21 QuickLoop Initialization, page 22...

  • Page 21: Dual-Switch Quickloop

    Using QuickLoop Sometimes, a single fabric loop device is attached to a port. In this case, the port would function as an FL_port. The attached device possesses either an N_port (if the device is fabric-capable) or an NL_port, in which case the device would be connected to the fabric in a loop configuration through an FL_Port on a switch.

  • Page 22: Quickloop Initialization

    Using QuickLoop QuickLoop Initialization QuickLoop initialization includes two passes: Pass 1 Sequential looplet initialization—Allows each device in a looplet to obtain a unique AL_PA. Pass 2 Full QuickLoop initialization—Brings QuickLoop up to operation. If Advanced Zoning is in use, the looplets that are initialized depend upon the zoning configuration.

  • Page 23: Error Handling

    Using QuickLoop Error Handling QuickLoop isolates faulty switches or ports by excluding them from the initialization process. This allows minimization of the impact of a faulty looplet or switch on normal QuickLoop operations, and is particularly important for QuickLoops that contain multiple looplets distributed across two switches. Topics in this section include: Switch Level Errors Port Level Errors...
  • Page 24 Using QuickLoop The looplet error recovery procedure includes the following steps: 1. LIPs are issued to the looplet, and it is determined whether the hidden FL_Port enters OPEN-INIT and becomes the Loop Initialization Master. 2. The rest of the standard Loop Initialization Sequences are completed, and it is determined whether the looplet can be fully initialized within a time-out period.

  • Page 25: Glossary

    glossary Glossary This glossary defines terms used in this guide or related to this product and is not a comprehensive glossary of computer terms. Glossary 16-port card The Fibre Channel port card provided with the StorageWorks Core switch. Contains 16 Fibre Channel ports and the corresponding LEDs indicating port status and speed.
  • Page 26 Glossary Alias An alternate name for an element or group of elements in the fabric. Aliases can be used to simplify the entry of port numbers and WWNs when creating zones. Alias Address Identifier An address identifier recognized by a port in addition to its standard identifier. An alias address identifier may be shared by multiple ports.
  • Page 27 Glossary Asynchronous Transfer Mode. A transport used for transmitting data over LANs or WANs that transmit fixed-length units of data. Provides any-to-any connectivity, and allows nodes to transmit simultaneously. Auto-negotiate Speed Process that allows two devices at either end of a link segment to negotiate common features, speed (e.g., 1 or 2 Gbps) and functions.
  • Page 28 Glossary Beginning Running Disparity The disparity at the transmitter or receiver when the special character associated with an ordered set is encoded or decoded. See also disparity. Bit Error Rate. The rate at which bits are expected to be received in error. Expressed as the ratio of error bits to total bits transmitted.
  • Page 29 Glossary Boot Monitor Code used to initialize the CP (control processor) environment after powering on. Identifies the amount of memory available and how to access it, and retrieves information about system buses. Broadcast The transmission of data from a single source to all devices in the fabric, regardless of zoning. See also multicast, unicast.
  • Page 30 Glossary Class F Connectionless service for control traffic between switches, with notification of delivery or non-delivery of data between the E_Ports. Class of Service A specified set of delivery characteristics and attributes for frame delivery. Command line interface. Interface that depends entirely on the use of commands, such as through telnet or SNMP, and does not involve a Graphic User Interface (GUI).
  • Page 31 Glossary Configuration How a system is set up. May refer to hardware or software. Hardware: The number, type, and arrangement of components that make up a system or network. Software: The set of parameters that guide switch operation. May include general system parameters, IP address information, Domain ID, and other information.
  • Page 32 Glossary CT_HDR Common Transport Header. A header that conforms to the Fibre Channel Common Transport (FC_CT) protocol. CT_IU Common Transport Information Unit. An information unit that conforms to the Fibre Channel Common Transport (FC_CT) protocol. Current Fill Word The fill word currently selected by the LPSM. See also fill word, LPSM.
  • Page 33 Glossary Device Connection Controls Enables organizations to bind an individual device port to a set of one or more switch ports. Device ports are specified by a WWN and typically represent HBAs (servers). See also access control lists. Device A disk, a RAID, or an HBA. Disparity The relationship of ones and zeros in an encoded character.
  • Page 34 Glossary E_Port Expansion Port. A type of switch port that can be connected to an E_Port on another switch to create an ISL. See also ISL. EE_Credit End-to-end Credit. The number of receive buffers allocated by a recipient port to an originating port.
  • Page 35 Glossary Exchange The highest level Fibre Channel mechanism used for communication between N_Ports. Composed of one or more related sequences, and can work in either one or both directions. Extended Fabric An HP product that runs on Fabric OS and allows creation of a Fibre Channel fabric interconnected over distances of up to 100 kilometers.
  • Page 36 Glossary Fabric Configuration Server One or more designated HP switches that store and manage the configuration and security parameters for all other switches in the fabric. These switches are designated by WWN, and the list of designated switches is known fabric-wide. Fabric Manager An HP product that works in conjunction with Web Tools to provide a graphical user interface for managing switch groups (such as the SAN Switch Integrated/32) as a single unit, instead of as...
  • Page 37 Glossary FC-FLA The Fibre Channel Fabric Loop Attach standard defined by ANSI. FCIA Fibre Channel Industry Association. An international organization of Fibre Channel industry professionals. Among other things, provides oversight of ANSI and industry developed standards. Fibre Channel Protocol. Mapping of protocols onto the Fibre Channel standard protocols. For example, SCSI FCP maps SCSI-3 onto Fibre Channel.
  • Page 38 Glossary Firmware Download Loading firmware down from a server into a switch. Firmware The basic operating system provided with the hardware. FL_Port Fabric Loop Port. A port that is able to transmit under fabric protocol and also has arbitrated loop capabilities.
  • Page 39 Glossary FS_REQ Fibre Channel Services Request. A request for a Fibre Channel services function, or notification of a fabric condition or event. FS_RJT Fibre Channel Services Reject. An indication that a request for Fibre Channel services could not be processed. Fibre Channel Service.
  • Page 40 Glossary GBIC Gigabit interface converter. A removable serial transceiver module that allows gigabaud physical-level transport for Fibre Channel and gigabit Ethernet. Typically refers only to the SC-form factor transceivers. See also SFP. Gbps Gigabits per second (1,062,500,000 bits/second). GBps Gigabytes per second (1,062,500,000 bytes/second). Half-duplex A mode of communication that allows a port to either transmit or receive frames at any time, but not simultaneously (with the exception of link control frames, which can be transmitted at any...
  • Page 41 Glossary Host A computer that accesses storage devices over the fabric. May also be referred to as a server. See also workstation. Hot Pluggable A FRU capability that indicates it may be extracted or installed while customer data is otherwise flowing in the chassis.
  • Page 42 Glossary Isolated E_Port An E_Port that is online but not operational due to overlapping Domain IDs or nonidentical parameters (such as E_D_TOVs). See also E_Port. Interswitch Link. a Fibre Channel link from the E_Port of one switch to the E_Port of another. See also E_Port, cascade, ISL Trunking.
  • Page 43 Glossary L_Port Loop Port. A node port (NL_Port) or fabric port (FL_Port) that has arbitrated loop capabilities. An L_Port can be in one of two modes: Fabric mode: Connected to a port that is not loop capable, and using fabric protocol. Loop mode: In an arbitrated loop and using loop protocol.
  • Page 44 Glossary Loop Failure Loss of signal within a loop for any period of time, or loss of synchronization for longer than the time-out value. See also error. Loop Initialization The logical procedure used by an L_Port to discover its environment. Can be used to assign AL_PA addresses, detect loop failure, or reset a node.
  • Page 45 Glossary Modem Serial Port The upper serial port on the CP Card of the StorageWorks Core switch. Can be used to connect the CP Card to a modem with a standard 9-pin modem cable. Consists of a DB-9 connector wired as a RS-232 device, and can be connected by serial cable to a DCE device.
  • Page 46 Glossary NL_Port Node Loop Port. A node port that has arbitrated loop capabilities. Used to connect an equipment port to the fabric in a loop configuration through an FL_Port. See also N_Port, Nx_Port. Node Name The unique identifier for a node, communicated during login and port discovery. Node A Fibre Channel device that contains an N_Port or NL_Port.
  • Page 47 Glossary Ordered Set A transmission word that uses 8B/10B mapping and begins with the K28.5 character. Ordered sets occur outside of frames, and include the following items: Frame delimiters: Mark frame boundaries and describe frame contents. Primitive signals: Indicate events. Primitive sequences: Indicate or initiate port states.
  • Page 48 Glossary Point-to-point A Fibre Channel topology that employs direct links between each pair of communicating entities. See also topology. Port Cage The metal casing extending out of the optical port on the switch, and in which the SFP can be inserted.
  • Page 49 Glossary Public Device A device that supports arbitrated loop protocol, can interpret 8-bit addresses, and can log into the fabric. Public Loop An arbitrated loop that includes a participating FL_Port, and may contain both public and private NL_Ports. Public NL_Port An NL_Port that logs into the fabric, can function within either a public or a private loop, and can communicate with either private or public NL_Ports.
  • Page 50 Glossary RAID Redundant Array of Independent Disks. A collection of disk drives that appear as a single volume to the server and are fault tolerant through mirroring or parity checking. See also JBOD. Remote Fabric A fabric that spans across WANs by using protocol translation (a process also known as tunneling) such as Fibre Channel over ATM or Fibre Channel over IP.
  • Page 51 Glossary RSCN Registered State Change Notification. A switch function that allows notification of fabric changes to be sent from the switch to specified nodes. RX_ID Responder Exchange Identifier. A 2-byte field in the frame header used by the responder of the Exchange to identify frames as being part of a particular exchange.
  • Page 52 Glossary Small form factor pluggable. A transceiver used on 2 Gbps switches that replaces the GBIC. Refers to the LC-form factor transceiver. See also GBIC. SID/DID Source identifier/Destination identifier. S_ID is a 3-byte field in the frame header that is used to indicate the address identifier of the N_Port from which the frame was sent.
  • Page 53 1.0625-Gbps link speeds. May also refer to the type of GBIC or SFP. See also LWL. Tachyon A chip developed by Hewlett-Packard, and used in various devices. This chip has FC-0 through FC-2 on one chip. Target A storage device on a Fibre Channel network.
  • Page 54 Glossary Transceiver Device that converts one form of signaling to another for transmission and reception; in fiber optics, it refers to optical and electrical. Transfer State The state in which a port can establish circuits with multiple ports without reentering the arbitration cycle for each circuit.
  • Page 55 Glossary Upper-level Protocol. The protocol that runs on top of Fibre Channel. Typical upper-level protocols are SCSI, IP, HIPPI, and IPI. Unicast The transmission of data from a single source to a single destination. See also broadcast, multicast. user account A login intended for use by the customer to monitor, but not control, switch operation.
  • Page 56 Glossary Zone A set of devices and hosts attached to the same fabric and configured as being in the same zone. Devices and hosts within the same zone have access permission to others in the zone, but are not visible to any outside the zone. See also Zoning.

  • Page 57: Index

    index address translation getting help AL_PA arbitrated loop audience hardware translative mode authorized reseller, HP help, obtaining authorized reseller configurations, oop storage website conventions technical support document text symbols implementation of QuickLoop initialization default mode full (pass 2) document of QuickLoop conventions sequential looplet (pass 1) related documentation...
  • Page 58 Index initialization sequences looplet recovery looplet error 19, port level switch level related documentation master, QuickLoop modes about sequential looplet initialization (pass 1) Fabric Assist SNMP Fabric mode (switch-level) standard translative mode hardware translative switch level mixed 16, errors QuickLoop Fabric mode QuickLoop (switch level) mixed mode...

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