HP StorageWorks MSA 2/8 - SAN Switch User Manual
Hp storageworks isl trunking v3.1.x/4.1.x user guide (aa-rtsac-te, june 2003)
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hp StorageWorks
ISL trunking version 3.1.x/4.1.x
Product Version: 3.1.x/4.1.x
Third Edition (June 2003)
Part Number: AA–RTSAC–TE
This user guide provides an overview of the optionally licensed ISL Trunking Fabric OS feature.
This guide also includes information about how to activate and to use the ISL Trunking feature.
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Table of Contents
Related Manuals for HP StorageWorks MSA 2/8 - SAN Switch
Summary of Contents for HP StorageWorks MSA 2/8 - SAN Switch
- Page 1 user guide hp StorageWorks ISL trunking version 3.1.x/4.1.x Product Version: 3.1.x/4.1.x Third Edition (June 2003) Part Number: AA–RTSAC–TE This user guide provides an overview of the optionally licensed ISL Trunking Fabric OS feature. This guide also includes information about how to activate and to use the ISL Trunking feature.
- 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.
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Page 3: Table Of Contents
contents Contents About this Guide........... .7 Overview. - Page 4 Contents Using Performance Monitoring to Gather Traffic Data......30 Using Fabric Watch to Gather Traffic Data........30 Managing ISL Trunking .
- Page 5 Contents Availability ............51 Description.
- Page 6 Contents Trunk Information tab ........... 41 Tables Document Conventions .
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Page 7: About This Guide
about this guide About this Guide This user guide provides information to help you: Become familiar with, install, and use the ISL Trunking feature About this Guide Contact technical support for additional assistance “About this Guide” topics include: Overview, page 8 Conventions, page 9 Getting Help, page 11... -
Page 8: Overview
About this Guide Overview This section covers the following topics: Intended Audience Related Documentation Intended Audience This book is intended for use by system administrators who are experienced with the following: HP StorageWorks Fibre Channel SAN switches Fabric Operating System (FOS) V3.1.x or later Related Documentation For a list of related documents included with this product, see the “Related Documents”... -
Page 9: 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 10 About this Guide Note: Text set off in this manner presents commentary, sidelights, or interesting points of information. ISL Trunking Version 3.1.x/4.1.x User Guide...
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Page 11: 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 12 About this Guide ISL Trunking Version 3.1.x/4.1.x User Guide...
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Page 13: Introducing Isl Trunking
Introducing ISL Trunking This chapter provides the following information: Overview, page 14 How ISL Trunking Works, page 15 ISL Trunking Version 3.1.x/4.1.x User Guide... -
Page 14: Overview
Introducing ISL Trunking Overview ISL Trunking allows the formation of trunking groups that distribute traffic across the shared bandwidth of all the Interswitch Links (ISLs) in the trunking group. ISL Trunking is an optionally licensed product provided on the Fabric Operating System (FOS) on all HP StorageWorks 2 Gbps switches. -
Page 15: How Isl Trunking Works
Introducing ISL Trunking How ISL Trunking Works The ISL Trunking software identifies and constructs trunking groups as soon as the ISL Trunking license is activated. The ISLs and ports that participate in trunking groups are referred to as trunking ISLs and trunking ports. ISL Trunking makes it possible to accomplish the same fabric performance with fewer ISLs, resulting in simplified fabric design and management, lowered cost of ownership, increased fabric performance, and increased data availability. -
Page 16: Trunking Groups
Introducing ISL Trunking ISL Trunking reduces or eliminates situations that require static traffic routes and individual ISL management in order to achieve optimal performance. If any static routes are specified using the urouteconfig command, the command overrides the dynamic load sharing employed by ISL Trunking, and performance may decrease accordingly. -
Page 17: Port Groupings On A San Switch 2/8 El
Introducing ISL Trunking All trunking ports must meet the following criteria: All ports in the same trunking group must reside in the same quad; quads are groups of four adjacent ports that are marked in intervals on each switch. The first four ports on a switch comprise the first quad, and every group of four adjacent ports thereafter comprise another quad. -
Page 18: Quad And Port Groupings On A San Switch 2/32
Introducing ISL Trunking Figure 4 shows which ports on a SAN Switch 2/32 belong to the same quads. Ports 16-19 Ports 24-27 Ports 28-31 Ports 20-23 Ports 0-3 Ports 8-11 Ports 4-7 Ports 12-15 Figure 4: Quad and port groupings on a SAN Switch 2/32 ISL Trunking Version 3.1.x/4.1.x User Guide... -
Page 19: Port Groupings On The Port Card On A Core Switch 2/64
Introducing ISL Trunking Figure 5 shows which ports on a Core Switch 2/64 port card belong to the same quads. Ports 12-15 Ports 8-11 Ports 4-7 Ports 0-3 Figure 5: Port groupings on the port card on a Core Switch 2/64 ISL Trunking Version 3.1.x/4.1.x User Guide... - Page 20 Introducing ISL Trunking ISL Trunking Version 3.1.x/4.1.x User Guide...
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Page 21: Activating Isl Trunking
Activating ISL Trunking This chapter provides the following information: Overview, page 22 License Activation, page 23 ISL Trunking Version 3.1.x/4.1.x User Guide... -
Page 22: Overview
Activating ISL Trunking Overview The ISL Trunking feature is provided with the Fabric OS and can be activated by entering a license key, available from the switch supplier. When the ISL Trunking license is activated, trunking is automatically implemented for any eligible ISLs. A license must be activated on each switch that will participate in trunking. -
Page 23: License Activation
Activating ISL Trunking License Activation You can verify and activate licenses using the command line interface (CLI) or by using the Web Tools interface. This section provides CLI instructions only. For instructions on activating a license through Web Tools, refer to the HP StorageWorks Web Tools Version 3.1.x/4.1.x User Guide. - Page 24 Activating ISL Trunking 4. Enter the following: licenseadd <“key”> where “key” is the license key exactly as provided by the switch supplier. The license key is case-sensitive. switch:admin> licenseadd "aAaaaaAaAaAaAaA" adding license key "aAaaaaAaAaAaAaA" done. switch:admin> 5. Enter the licenseshow command to verify that the license was successfully activated.
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Page 25: Setting Up Isl Trunking In A Fabric
Setting Up ISL Trunking in a Fabric This chapter provides the following information: Overview, page 26 Designing the Fabric to Optimize Use of ISL Trunking, page 27 Evaluating Data Traffic Patterns, page 29 ISL Trunking Version 3.1.x/4.1.x User Guide... -
Page 26: Overview
Setting Up ISL Trunking in a Fabric Overview To utilize ISL Trunking in the fabric, the fabric must be designed to allow trunking groups to form. To identify the most useful trunking groups, evaluate the traffic patterns before designing/redesigning the fabric. Note: ISL Trunking is enabled by default for each port on the switch as shipped. -
Page 27: Designing The Fabric To Optimize Use Of Isl Trunking
Setting Up ISL Trunking in a Fabric Designing the Fabric to Optimize Use of ISL Trunking ISL Trunking can be utilized to simplify SAN design and improve SAN performance. When designing the SAN, consider the following recommendations in addition to the standard guidelines for SAN design: Evaluate the traffic patterns within the fabric. - Page 28 Setting Up ISL Trunking in a Fabric — The addition of a path that is shorter than existing paths will cause traffic to be rerouted through that path. — The addition of a path that is longer than existing paths may not be useful because the traffic will choose the shorter paths first.
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Page 29: Evaluating Data Traffic Patterns
Setting Up ISL Trunking in a Fabric Evaluating Data Traffic Patterns Traffic patterns can be monitored using the portperfshow command, the Performance Monitoring feature, the Fabric Watch feature, or a combination. Using the CLI to Gather Traffic Data The portperfshow command can be used to record the traffic volume for each port over time to identify the congested paths that would benefit from the implementation of trunking groups. -
Page 30: Using Performance Monitoring To Gather Traffic Data
Setting Up ISL Trunking in a Fabric Example 2. The following example shows traffic flowing through a trunking group of three ports, with one of the links failing after the second reading, causing redistribution of traffic over the remaining two links in the group. switch:admin>... -
Page 31: Managing Isl Trunking
Managing ISL Trunking This chapter provides the following information: Overview, page 32 Enabling and Disabling Trunking, page 33 Specifying Port Speeds, page 36 Displaying Trunking Information, page 39 Troubleshooting, page 42 Frequently Asked Questions About ISL Trunking, page 45 ISL Trunking Version 3.1.x/4.1.x User Guide... -
Page 32: Overview
Managing ISL Trunking Overview ISL Trunking provides a number of management options, including enabling and disabling trunking on entire switches or individual ports, setting port speeds for entire switches or individual ports, displaying trunking information, and debugging any trunking failures. ISL Trunking can be managed using a telnet or serial command line interface, Web Tools, or Fabric Manager. -
Page 33: Enabling And Disabling Trunking
Managing ISL Trunking Enabling and Disabling Trunking Trunking can be enabled and disabled for an individual port or an entire switch, through either the command line interface (CLI) or Web Tools. Enabling and Disabling Trunking Using the CLI Telnet and serial sessions can be used to enable and disable trunking. To enable or disable trunking for an individual port: 1. -
Page 34: Enabling And Disabling Trunking Using Web Tools
Managing ISL Trunking switch:admin> switchcfgtrunk 1 Committing configuration...done. switch:admin> Enabling and Disabling Trunking Using Web Tools Web Tools can be used to enable and disable trunking. To enable or disable trunking for one or more ports through Web Tools: 1. Launch Web Tools by launching the web browser and entering the switch name or IP address in the URL field. -
Page 35: Port Setting Tab
Managing ISL Trunking Figure 6: Port Setting tab ISL Trunking Version 3.1.x/4.1.x User Guide... -
Page 36: Specifying Port Speeds
Managing ISL Trunking Specifying Port Speeds Port speeds can be set for the entire switch or for individual ports using either the CLI or Web Tools. If trunking is enabled, the only supported speeds are 2 Gbit/sec and auto-negotiate. If trunking is not enabled, 1 Gbit/sec is also supported. Setting Port Speeds Using the CLI A telnet or serial session can be used to set the port speed for an individual port or the entire switch. -
Page 37: Setting Port Speeds Using Web Tools
Managing ISL Trunking To specify the speed for an individual port: 1. Open a CLI connection to the switch to be modified. 2. Log into the switch as Admin. The default password is password. 3. Enter the following: portcfgspeed <slotnumber/portnumber speedlevel> where: <slotnumber>... - Page 38 Managing ISL Trunking 3. Click the Admin icon. 4. Log into the switch as Admin. The default password is password. 5. Choose the Port Setting tab. 6. Choose the arrow in the Change Speed column and select the desired speed from the pull-down menu.
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Page 39: Displaying Trunking Information
Managing ISL Trunking Displaying Trunking Information Web Tools or a telnet or serial session can be used to view information about the trunking groups that exist on the local switch. Displaying Trunking Information Using the CLI The trunkshow command can be used to display information about trunking groups. -
Page 40: Displaying Trunking Information Using Web Tools
Managing ISL Trunking Example. The following example displays the trunkshow command output. switch:admin> trunkshow 1: 1 -> 10:00:00:60:69:04:10:83 deskew 16 Master 0 -> 10:00:00:60:69:04:10:83 deskew 15 2: 4 -> 10:00:00:60:69:04:01:94 deskew 16 Master 5 -> 10:00:00:60:69:04:01:94 deskew 15 7 -> 10:00:00:60:69:04:01:94 deskew 17 6 ->... -
Page 41: Trunk Information Tab
Managing ISL Trunking Figure 7: Trunk Information tab ISL Trunking Version 3.1.x/4.1.x User Guide... -
Page 42: Troubleshooting
Managing ISL Trunking Troubleshooting Troubleshooting information can be accessed through two methods: the trunkdebug command and the Error Log. Debugging a Trunking ISL Failure If a trunked ISL link fails, debugging information is available through the CLI for use in troubleshooting and error correction. To view debugging information for a trunking ISL failure: 1. -
Page 43: Interpreting Isl Trunking Error Messages
Managing ISL Trunking Interpreting ISL Trunking Error Messages The only two error messages that relate to ISL Trunking are described below. The error log can be accessed through the errshow and errdump commands. Warning BLOOM-TRNK_MSTR_DWN... This type of message indicates that the Master ISL has been disconnected or has failed. - Page 44 Managing ISL Trunking port 46 indicates the area number of the Subordinate Port [47 46] indicates the ports that are participating in the trunking group If this error displays, the following actions are recommended: Determine whether a Subordinate ISL has been physically disconnected. If a Subordinate ISL has not been disconnected, enter the portlogdump and fabstateshow commands, save the output, and contact Technical Support for assistance.
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Page 45: Frequently Asked Questions About Isl Trunking
Managing ISL Trunking Frequently Asked Questions About ISL Trunking Table 2 provides answers to some frequently asked questions regarding ISL Trunking. Table 2: Frequently Asked Questions about ISL Trunking Frequently Asked Question Answer Does ISL Trunking replace Dense No, DWDM is a ring topology, and Wavelength Digital Multiplexing has a different function from trunking. - Page 46 Managing ISL Trunking Table 2: Frequently Asked Questions about ISL Trunking (Continued) Frequently Asked Question Answer Should port statistics be the same No; although port statistics are usually across all participating ISLs within a fairly evenly balanced, they can vary trunk? with payload variations at the frame level.
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Page 47: Isl Trunking Commands
ISL Trunking Commands ISL Trunking includes several commands that can be used to configure settings related to trunking, such as setting port speeds, enabling and disabling trunking, debugging a trunk link, and displaying information about trunking. ISL Trunking Version 3.1.x/4.1.x User Guide... -
Page 48: Command List
ISL Trunking Commands Command List Table 3 provides summary information about the commands that relate to ISL Trunking. Table 3: Fabric OS Commands Related to ISL Trunking Command Function Limitations portcfgspeed Use to specify the port Enter on the switch with speed. -
Page 49: Operands
ISL Trunking Commands If the command is specified without an operand, you are prompted to enter the speed value. The output of the portshow command displays the current achieved speed for the port, and the portcfgshow command displays the desired speed setting for the port. -
Page 50: Portcfgtrunkport
ISL Trunking Commands portcfgtrunkport Syntax This command uses the following syntax: portcfgtrunkport <[slotnumber/]portnumber [1|0]> Availability This command is available to admin users only. Description Use this command to specify a port to be enabled or disabled for trunking. Note: This command requires a Trunking license. Operands This command has the following operands: slotnumber - Specify the number of the blade that the port belongs to. -
Page 51: See Also
ISL Trunking Commands See Also Also see the following related commands: switchcfgtrunk portshow portcfgshow switchshow switchcfgspeed Syntax This command uses the following syntax: switchcfgspeed <[speedlevel]> Availability This command is available to admin users only. Description Use this command to specify the speed of all the ports on a switch at a particular level. -
Page 52: Example
ISL Trunking Commands 1 - 1 Gbit/sec mode. The port will be at fixed speed of 1 Gbit/sec. 2 - 2 Gbit/sec mode. The port will be at fixed speed of 2 Gbit/sec. If the command is specified without an operand, you are prompted to enter a value. -
Page 53: Operands
ISL Trunking Commands Operands This command has the following required operand: 0|1 - Specify 1 to enable trunking on all the ports on this switch. Specify 0 to disable trunking on all the ports on this switch. Example Enabling trunking on a switch: switch:admin>... -
Page 54: Operands
ISL Trunking Commands port<port_id> trunking disabled port<port_id> speed is not 2G port<port_id> and port<port_id> are not on same quad port<port_id> and port<port_id> connect to different switches port<port_id> is not Trunking Port due to: E_Port being disabled, or trunking may be disabled at remote port port<port_id>... -
Page 55: See Also
ISL Trunking Commands See Also Also see the following related commands: trunkshow portcfgtrunkport switchcfgtrunk ISL Trunking Version 3.1.x/4.1.x User Guide... -
Page 56: Trunkshow
ISL Trunking Commands trunkshow Syntax This command uses the following syntax: trunkshow Availability This command is available to all users. Description Use this command to display trunking information. The fields displayed are as follows: Trunking Group Number - Displays each trunking group on a switch. All the ports that are part of this trunking group are displayed. -
Page 57: Example
ISL Trunking Commands Example Displaying trunking information for a switch: switch:admin> trunkshow 1: 1 -> 10:00:00:60:69:04:10:83 deskew 15 Master 0 -> 10:00:00:60:69:04:10:83 deskew 15 2: 4 -> 10:00:00:60:69:04:01:94 deskew 16 Master 5 -> 10:00:00:60:69:04:01:94 deskew 15 7 -> 10:00:00:60:69:04:01:94 deskew 17 6 ->... - Page 58 ISL Trunking Commands ISL Trunking Version 3.1.x/4.1.x User Guide...
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Page 59: 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 60 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 61 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 62 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 63 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 64 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 65 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 66 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 67 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 68 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 69 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 70 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 71 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 72 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 73 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 74 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 75 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 76 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 77 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 78 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 79 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 80 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 81 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 82 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 83 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 84 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 85 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 86 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 87 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 88 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 89 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 90 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.
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Page 91: Index
index audience enabling trunking authorized reseller, HP equipment symbols error messages, interpreting commands portcfgspeed fabric portcfgtrunkport designing for trunking switchcfgspeed FAQs switchcfgtrunk FSPF trunkdebug trunkshow urouteconfig getting help conventions groups, trunking document equipment symbols text symbols help, obtaining core/edge topology authorized reseller storage website debugging... - Page 92 Index symbols in text symbols on equipment latency link failure Master ISL technical support, HP Subordinate ISL telnet commands, installation text symbols support for traffic patterns trunking with SWL evaluating planning for traffic, routing of managing ISL Trunking troubleshooting supported tools error log Master trunkdebug command...