S i m p l i f y
ꢀꢁ
SANbox2-16 Fibre Channel Switch
Installation Guide
59021-05 A
Page i
Table of Contents
Notes informatives relatives à la sécurité........................................................... 1-3
1.6.2
Canadian Department of Communications Class A
Compliance Statement .............................................................................. 1-4
1.6.3
Avis de conformité aux normes du ministère des
Accessible Parts................................................................................................. 1-8
Pièces Accessibles............................................................................................. 1-8
Zugängliche Teile ............................................................................................... 1-8
Technical Support............................................................................................... 1-9
Power Switches......................................................................................... 2-2
Chassis LEDs............................................................................................ 2-3
59021-05 A
Page iii
SANbox2-16 Fibre Channel Switch
Installation Guide
ꢂ
Expansion Port ................................................................................. 2-7
Common Topologies.................................................................................. 3-3
Latency...................................................................................................... 3-7
Mount the Switch....................................................................................... 4-3
Page iv
59021-05 A
SANbox2-16 Fibre Channel Switch
Installation Guide
ꢂ
Cable Devices to the Switch.................................................................... 4-16
Install Firmware................................................................................................ 4-17
POST Diagnostics.............................................................................................. 5-1
Heartbeat LED Blink Patterns.................................................................... 5-1
Normal (all pass)............................................................................... 5-1
Chassis Diagnostics........................................................................................... 5-9
Maintenance – Exit.................................................................................. 5-13
59021-05 A
Page v
SANbox2-16 Fibre Channel Switch
Installation Guide
ꢂ
SFP Transceivers............................................................................................... 6-2
Switch Maintainability.........................................................................................A-2
Switch Dimensions.............................................................................................A-3
Switch Environmental.........................................................................................A-4
Commands.........................................................................................................B-3
Help Command........................................................................................B-11
Image Command.....................................................................................B-13
Page vi
59021-05 A
SANbox2-16 Fibre Channel Switch
Installation Guide
ꢂ
Set Port Command..................................................................................B-37
Show Command......................................................................................B-42
Show Perf Command ..............................................................................B-60
Test Command ........................................................................................B-66
Whoami Command..................................................................................B-72
Zoneset Command..................................................................................B-77
Zoning Command....................................................................................B-80
Figures
Figure
Page
Ethernet Port.................................................................................................................. 2-8
2-10 Fans ............................................................................................................................. 2-10
Mesh Topology...............................................................................................................3-4
Multistage Topology....................................................................................................... 3-5
Ethernet and Serial Cable Connections......................................................................... 4-8
59021-05 A
Page vii
SANbox2-16 Fibre Channel Switch
Installation Guide
ꢂ
Tables
Table
Page
Serial Port Pin Identification........................................................................................... 2-9
Port-to-Port Latency....................................................................................................... 3-7
Switch Configuration Defaults......................................................................................B-19
Port Configuration Defaults..........................................................................................B-19
B-10 Set Config Zoning Parameters.....................................................................................B-29
B-11 SNMP Configuration Settings ......................................................................................B-38
B-12 System Configuration Settings.....................................................................................B-39
B-13 Show Port Parameters.................................................................................................B-44
Page viii
59021-05 A
Section 1
Introduction
This manual describes the features and installation of the SANbox2-16 Fibre
Channel switch, firmware version 1.5. This manual is organized as follows:
I
Section 1 describes the intended audience, related materials, safety notices,
communications statements, laser safety information, electrostatic discharge
sensitivity precautions, accessible parts, and technical support.
I
Section 2 is an overview of the switch. It describes indicator LEDs and all
user controls and connections.
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Section 3 describes the factors to consider when planning a fabric.
Section 4 explains how to install and configure the switch.
Section 5 describes the diagnostic methods and troubleshooting
procedures.
I
Section 6 describes the removal/replacement procedures for all field
replaceable units (FRUs).
I
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Appendix A lists the switch specifications.
Please read the communications statements and laser safety information later in
this section. Use this manual in conjunction with the SANbox2-8c/16 Switch
Management User’s Guide.
1.1
Intended Audience
This manual introduces users to the switch and explains its installation and
service. It is intended for users who are responsible for installing and servicing
network equipment.
59021-05 A
1-1
1 – Introduction
Related Materials
ꢂ
1.2
Related Materials
The following manuals and materials are referenced in the text and/or provide
additional information.
I
SANbox2-8c/16 Switch Management User’s Guide, Publication Number
59022-05.
I
I
Fibre Channel-Arbitrated Loop (FC-AL-2) Rev. 6.8.
Fibre Channel-Private Loop SCSI Direct Attach (FC-PLDA) NCITS
TR-19:1998
I
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Fibre Channel-10-bit Interface Rev. 2.3.
Definitions of Managed Objects for the Fabric Element in Fibre Channel
Standard (draft-ietf-ipfc-fabric-element-mib-04.txt).
The Fibre Channel Standards are available from:
Global Engineering Documents, 15 Inverness Way East, Englewood, CO
80112-5776 Phone: (800) 854-7179 or (303) 397-7956 Fax: (303)
397-2740.
1-2
59021-05 A
1 – Introduction
Safety Notices
ꢂ
1.3
Safety Notices
A Warning notice indicates the presence of a hazard that has the potential of
causing personal injury.
A Caution notice indicates the presence of a hazard that has the potential of
causing damage to the equipment.
1.4
Sicherheitshinweise
Ein Warnhinweis weist auf das Vorhandensein einer Gefahr hin, die
möglicherweise Verletzungen zur Folge hat.
Ein Vorsichtshinweis weist auf das Vorhandensein einer Gefahr hin, die
möglicherweise Geräteschäden zur Folge hat.
1.5
Notes informatives relatives à la sécurité
Une note informative Avertissement indique la présence d’un risque pouvant
entraîner des blessures.
Une note informative Attention indique la présence d’un risque pouvant entraîner
des dégâts matériels.
59021-05 A
1-3
1 – Introduction
Communications Statements
ꢂ
1.6
Communications Statements
The following statements apply to this product. The statements for other products
intended for use with this product appear in their accompanying manuals.
1.6.1
Federal Communications Commission (FCC) Class A Statement
This equipment has been tested and found to comply with the limits for a Class A
digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to
provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can
radiate radio frequency energy, and, if not installed and used in accordance with
the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area may cause unacceptable
interference, in which case the user will be required to correct the interference at
their own expense
Neither the provider nor the manufacturer is responsible for any radio or television
interference caused by unauthorized changes or modifications to this equipment.
Unauthorized changes or modifications could void the user’s authority to operate
the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions:
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I
This device may not cause harmful interference, and
This device must accept any interference received, including interference
that may cause undesired operation.
1.6.2
Canadian Department of Communications Class A Compliance
Statement
This equipment does not exceed Class A limits for radio emissions for digital
apparatus, set out in Radio Interference Regulation of the Canadian Department
of Communications. Operation in a residential area may cause unacceptable
interference to radio and TV reception requiring the owner or operator to take
whatever steps necessary to correct the interference.
1-4
59021-05 A
1 – Introduction
Communications Statements
ꢂ
1.6.3
Avis de conformité aux normes du ministère des Communications du
Canada
Cet équipement ne dépasse pas les limites de Classe A d'émission de bruits
radioélectriques por les appareils numériques, telles que prescrites par le
Réglement sur le brouillage radioélectrique établi par le ministère des
Communications du Canada. L'exploitation faite en milieu résidentiel peut
entraîner le brouillage des réceptions radio et télé, ce qui obligerait le propriétaire
ou l'opérateur à prendre les dispositions nécwssaires pour en éliminer les causes.
1.6.4
CE Statement
The CE symbol on the equipment indicates that this system complies with the
EMC (Electromagnetic Compatibility) directive of the European Community
(89/336/EEC) and to the Low Voltage (Safety) Directive (73/23/EEC). Such
marking indicates that this system meets or exceeds the following technical
standards:
I
EN60950/A11:1997 – “Safety of Information Technology Equipment,
Including Electrical Business Equipment”.
I
I
EN60825-1/A11:1996 –“Safety of Laser Products, Part 1.
EN55022:1998 – “Limits and Methods of Measurement of Radio
Interference Characteristics of Information Technology Equipment”.
I
EN55024-1:1998 – “Electromagnetic compatibility - Generic immunity
standard Part 1: Residential commercial, and light industry.”
I
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IEC1000-4-2:1995 – “Electrostatic Discharge Immunity Test”
IEC1000-4-3:1995 – “Radiated, Radio-Frequency, Electromagnetic
Field Immunity Test”
I
I
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IEC1000-4-4:1995 – “Electrical Fast Transient/Burst Immunity Test”
IEC1000-4-5:1995 – “Surge Immunity Test”
IEC1000-4-6:1996 – “Immunity To Conducted Disturbances, Induced
By Radio-Frequency Fields”
I
I
IEC1000-4-8:1993 – "Power Frequency Magnetic Field Immunity Test”
IEC1000-4-11:1994 – “Voltage Dips, Short Interruptions And Voltage
Variations Immunity Tests”
I
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EN61000-3-2:1995 – “Limits For Harmonic Current Emissions (Equipment
Input Current Less Than/Equal To 16 A Per Phase)” Class A
EN61000-3-3:1995 – “Limitation Of Voltage Fluctuations And Flicker In
Low-Voltage Supply Systems For Equipment With Rated Current Less Than
Or Equal To 16 A”
59021-05 A
1-5
1 – Introduction
Communications Statements
ꢂ
1.6.5
VCCI Class A Statement
This is a Class A product based on the standard of the Voluntary Control Council
For Interference by Information Technology Equipment (VCCI). If this equipment
is used in a domestic environment, radio disturbance may arise. When such
trouble occurs, the user may be required to take corrective actions.
1.6.6
BSMI Class A Statement
Warning:
This is a Class A product. In a domestic environment, this product may cause
radio interference in which case the user will be required to take adequate
measures.
1-6
59021-05 A
1 – Introduction
Laser Safety Information
ꢂ
1.7
Laser Safety Information
This product may use Class 1 laser optical transceivers to communicate over the
fiber optic conductors. The U.S. Department of Health and Human Services
(DHHS) does not consider Class 1 lasers to be hazardous. The International
Electrotechnical Commission (IEC) 825 Laser Safety Standard requires labeling in
English, German, Finnish, and French stating that the product uses Class 1
lasers. Because it is impractical to label the transceivers, the following label is
provided in this manual.
1.8
Electrostatic Discharge Sensitivity (ESDS) Precautions
The assemblies used in the switch chassis are ESD sensitive. Observe ESD
handling procedures when handling any assembly used in the switch chassis.
59021-05 A
1-7
1 – Introduction
Accessible Parts
ꢂ
1.9
Accessible Parts
The only Field Replaceable Units (FRUs) in the SANbox2-16 switch are:
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Small Form-Factor Pluggable (SFP) optical transceivers
Power supplies
Fans
1.10
Pièces Accessibles
Les pièces remplaçables, Field Replaceable Units (FRU), du commutateur
SANbox2-16 Fibre Channel Switch sont les suivantes:
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Interfaces aux media d’interconnexion appelés SFP transceivers.
Alimentation(s) de courant
Ventilateurs
renseignements.
1.11
Zugängliche Teile
Nur die folgenden Teile im SANbox2-16 Fibre Channel Switch können
kundenseitig ersetzt werden:
I
Schnittstellen für die Zwischenverbindungsträger, SFP transceivers
genannt.
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I
Netzteil(e)
Gehäuselüfte
Teile).
1-8
59021-05 A
1 – Introduction
Technical Support
ꢂ
1.12
Technical Support
Customers should contact their authorized maintenance provider for technical
support of their QLogic switch products. QLogic-direct customers may contact
QLogic Technical Support; others will be redirected to their authorized
maintenance provider.
firmware and software updates.
1.12.1
Availability
QLogic Technical Support is available from 7:00 AM to 7:00 PM Central Standard
Time, Monday through Friday, excluding QLogic-observed holidays.
1.12.2
Training
QLogic offers the following technical training courses:
I
Switch Certification
HBA Certification
I
Each course is available at the training facility in Eden Prairie, MN or at your local
facility. All courses include a Fibre Channel overview and sections on installation,
maintenance, and topology solutions. Each student receives a set of manuals and
a CD-ROM containing course training materials. Upon successful completion of
the training, Qlogic awards a certificate identifying the student as a Certified
SANbox® or SANblade® Professional.
1.12.3
Contact Information
Address:
QLogic Switch Products Inc.
6321 Bury Drive
Eden Prairie, Minnesota 55346
USA
Telephone:
Fax:
+1 952-932-4040
+1 952-932-4018
Email:
Technical Service
Technical Training
Switch Support Web Site:
59021-05 A
1-9
1 – Introduction
Technical Support
ꢂ
Notes
1-10
59021-05 A
Section 2
General Description
This section describes the features and capabilities of the SANbox2-16 Fibre
Channel switch. The following topics are described:
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Chassis controls and LEDs
Fibre channel ports
Ethernet port
Serial port
Power supplies
Fans
Fabric management
Fabrics are managed with the SANbox Manager switch management application
(version 1.05) and the Command Line Interface (CLI). Refer to the
SANbox2-8c/16 Switch Management User’s Guide for information about using the
more information.
Figure 2-1. SANbox2-16 Fibre Channel Switch
59021-05 A
2-1
2 – General Description
Chassis Controls and LEDs
ꢂ
2.1
Chassis Controls and LEDs
Chassis controls include the power supply On/Off switches and the Maintenance
LED, Fan Fail LED, Heartbeat LED, and the Input Power LED.
Maintenance
Button
Chassis LEDs
Left Power
Switch
RightPower
Switch
Figure 2-2. Chassis Controls and LEDS
2.1.1
Power Switches
Each power supply has an On/Off switch that controls power to the switch logic
circuitry. To apply power to the switch, place both switches in the On position.
2.1.2
Maintenance Button
The Maintenance button is a momentary switch on the front panel. Its purpose is
to place the switch in maintenance mode. Maintenance mode sets the IP address
to 10.0.0.1 and provides access to the switch for maintenance purposes when
To place the switch in maintenance mode, do the following:
1.
Isolate the switch from the fabric. Open a Telnet session, and enter the
2.
3.
Place both power supply switches in the Off position.
Press and hold the Maintenance button with a pointed tool for a few
seconds, then place one of the power supply switches in the On position.
You can release the Maintenance button after the Input Power LED
illuminates. When the switch is in maintenance mode, the Heartbeat LED
information about the Input Power LED and the Heartbeat LED.
To return to normal operation, power cycle the switch.
2-2
59021-05 A
2 – General Description
Chassis Controls and LEDs
ꢂ
2.1.3
Chassis LEDs
Over Temperature LED Fan Fail LED Heartbeat LED Input Power LED
(Amber)
(Amber)
(Amber)
(Green)
Figure 2-3. Chassis LEDs
2.1.3.1
Over Temperature LED (Amber)
The Over Temperature LED provides status information about the air temperature
inside the switch. This LED illuminates to indicate that the switch logic circuitry is
troubleshooting over temperature conditions.
2.1.3.2
Fan Fail LED (Amber)
The Fan Fail LED indicates operational status of both fans. This LED illuminates if
the speed of either fan falls below the normal range. Removing a fan will not
information about troubleshooting fan failure conditions.
59021-05 A
2-3
2 – General Description
Fibre Channel Ports
ꢂ
2.1.3.3
Heartbeat LED (Amber)
The Heartbeat LED indicates the status of the internal switch processor and the
results of the Power On Self Test (POST). Following a normal power-up, the
Heartbeat LED blinks about once per second to indicate that the switch passed
the POST and that the internal switch processor is running. In maintenance mode,
2.1.3.4
Input Power LED (Green)
The Input Power LED indicates the voltage status at the switch logic circuitry. This
LED illuminates when the switch logic circuitry is receiving the proper DC
voltages.
2.2
Fibre Channel Ports
Each SANbox2-16 switch has 16 Fibre Channel ports numbered 0 - 15 as shown
(SFP) transceiver. The port LEDs are located to the right of their respective ports
and provide port login and activity status information. The ports self discover the
proper mode when connected to public devices and other switches. You can also
configure any port to support a loop of private devices.
Port
Port LEDs
Figure 2-4. Fibre Channel Ports
2-4
59021-05 A
2 – General Description
Fibre Channel Ports
ꢂ
2.2.1
Small Form-Factor Pluggable (SFP) Transceivers
and from optical laser signals to transmit and receive data. SFP transceivers plug
into the ports; duplex fiber optic cables plug into the transceivers which then
connect to the devices. A port is capable of transmitting at 1 Gbps or 2 Gbps;
however, the transceiver must be capable of 2 Gbps for the port to deliver at that
rate.
The SFP transceivers are hot swappable. This means that you can remove or
install an SFP transceiver while the switch is operating without harming the switch
or the transceiver. However, communication with the connected device will be
installing and removing SFP optical transceivers.
Figure 2-5. SFP Transceiver
2.2.2
Port LEDs
Each data port has its own Logged-In LED and Activity LED as shown in
Figure 2-6. The Logged-In LED indicates whether the port and its connected
device are logged into the fabric, or if it is connected to another switch and they
are segmented. The Activity LED indicates the frequency at which the port
receives or transmits frames.
Logged-In LED
(Green)
Activity LED
(Amber)
Figure 2-6. Port LEDs
59021-05 A
2-5
2 – General Description
Fibre Channel Ports
ꢂ
2.2.2.1
Logged-In LED
The Logged-in LED indicates the logged-in or initialization status of the connected
devices. After successful completion of the POST, the switch extinguishes all
Logged-In LEDs. Following a successful loop initialization or port login, the switch
illuminates the corresponding logged-in LED. This shows that the port is properly
connected and able to communicate with its attached devices. The Logged-In
LED remains illuminated as long as the port is initialized or logged in. If the port
connection is broken or an error occurs that disables the port, the Logged-In LED
about the Logged-In LED.
2.2.2.2
Activity LED
The Activity LED indicates that data is passing through the port. Each frame that
the port transmits or receives causes this LED to illuminate for 50 milliseconds.
This makes it possible to observe the transmission of a single frame. When
extending credits, an Activity LED for a donor port will reflect the traffic of the
extended credits and donor ports.
2.2.3
Port Modes
SANbox2-16 switches support the following port modes:
I
Generic ports (GL_Port and G_Port)
Fabric ports (FL_Port and F_Port)
Translated loop ports (TL_Port)
Expansion ports (E_Port)
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Switches come from the factory with all ports configured as GL_Ports. GL_Ports
self-configure in the following ways:
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FL_Port when connected to a loop of public devices
F_Port when connected to a single public device. If the device is a single
device on a loop, the GL_Port will attempt to configure first as an F_Port,
then if that fails, as an FL_Port.
I
E_Port when connected to another FC-SW-2 compliant switch
2-6
59021-05 A
2 – General Description
Fibre Channel Ports
ꢂ
G_Ports self-configure in the following ways:
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F_Port when connected to a public device
E_Port when connected to another FC-SW-2 compliant switch
A TL_Port supports private loop devices and must be configured explicitly. Refer
to the SANbox2-8c/16 Switch Management User’s Guide for more information
about defining port modes.
2.2.3.1
Fabric Ports
An FL_Port can support a loop of up to 126 public devices. An FL_Port can also
configure itself during the fabric login process as an F_Port when connected to a
single public device (N_Port).
2.2.3.2
Translated Loop Port
A TL_Port supports a loop of up to 125 private initiator devices or up to 124
private target devices with the ability to communicate with “off-loop” devices. This
includes public fabric devices and private devices on other TL_Ports. TL_Ports
connect to devices that conform to the Fibre Channel-Private Loop SCSI Direct
Attach (FC-PLDA) standard. Devices connected to TL_Ports are registered with
the Name Server.
A TL_Port acts as a proxy for the off-loop device translating private frames into
and from public frames. Each TL_Port can proxy up to 63 off-loop initiator devices
or up to 64 off-loop target and initiator devices. The set of off-loop devices are
maintained in the TL_Port’s translation entries list.
I
For a TL_Port connected to private target devices, the switch firmware
automatically creates an entry in the translation entries list for each off-loop
initiator device that attempts to establish communication. Soft or VPF zoning
can be used to limit the number of potential initiators to 63. Zone
membership must be done by worldwide name, or domain ID and port ID.
I
For a TL_Port connected to private initiator devices, the switch firmware
automatically creates an entry in the translation entries list for up to 64 target
and initiator devices that are members of the same soft or VPF zone. Zone
membership must be done by worldwide name, or domain ID and port ID.
2.2.3.3
Expansion Port
E_Ports enable you to expand the fabric by connecting SANbox2-16 switches with
other FC-SW-2 compliant switches. SANbox2-16 switches self-discover all
information about multiple chassis fabrics.
59021-05 A
2-7
2 – General Description
Ethernet Port
ꢂ
2.3
Ethernet Port
connection to a management workstation. A management workstation can be a
Windows, Solaris™ workstation, or a Linux® workstation that is used to configure
and manage the switch fabric. You can manage the switch over an Ethernet
connection using SANbox Manager, the Command Line Interface (CLI), or SNMP.
The switch through which the fabric is managed is called the fabric management
switch.
RJ-45 Ethernet Port
Figure 2-7. Ethernet Port
2.4
Serial Port
The SANbox2-16 switch is equipped with an RS-232 serial port for maintenance
purposes. The serial port is located on the back of the switch under a small cover
the CLI.
1
5
6
9
Serial Port
Figure 2-8. Serial Port
2-8
59021-05 A
2 – General Description
Power Supplies
ꢂ
The serial port connector requires a null-modem F/F DB9 cable. The pins on the
information about connecting the management workstation through the serial port.
Table 2-1. Serial Port Pin Identification
Pin Number
Description
1
2
3
4
5
6
7
8
9
Carrier Detect (DCD)
Receive Data (RxD)
Transmit Data (TxD)
Data Terminal Ready (DTR)
Signal Ground (GND)
Data Set Ready (DSR)
Request to Send (RTS)
Clear to Send (CTS)
Ring Indicator (RI)
2.5
Power Supplies
The power supplies convert standard 110 or 230 VAC to DC voltages for the
various switch circuits. Each power supply has an AC power receptacle, an On/Off
supply to an AC voltage source and placing the power switch in the On position,
the power supply is energized and DC voltage is delivered to the switch logic
a power supply.
Over Temperature LED
(Amber)
Output Power LED
(Green)
AC Power
Receptacle
On/Off Switch
Figure 2-9. Power Supply Components
59021-05 A
2-9
2 – General Description
Fans
ꢂ
Each power supply is capable of providing all of the switch’s power needs. During
normal operation, each power supply provides half of the demand. If one power
supply goes offline, the second power supply steps up and provides the
difference.
The power supplies are hot swappable and interchangeable. Hot swappable
means that you can remove and replace one power supply while the switch is in
operation without disrupting service.
Each power supply has two status LEDs: an Output Power LED (green) and an
Over Temperature LED (amber):
I
The Output Power LED illuminates to indicate that the power supply is
producing DC voltage at the proper levels.
I
The Over Temperature LED illuminates to indicate that the power supply is
overheating. When a power supply overheats, the switch extinguishes the
Output Power LED and shuts down the power supply. Refer to
Section 5 Diagnostics/Troubleshooting for information about troubleshooting
over temperature conditions.
2.6
Fans
fail, the other fan is capable of providing the necessary cooling until the failed fan
can be replaced. The fans are hot swappable and interchangeable. Refer to
can be front-to-back or back-to-front depending on the switch model.
Fans
Figure 2-10. Fans
2-10
59021-05 A
2 – General Description
Switch Management
ꢂ
2.7
Switch Management
SANbox Manager is a workstation-based Java® application that provides a
graphical user interface for fabric management. This application runs on a
Windows®, Solaris™, or Linux® workstation. The management workstation
connects to the fabric directly through one switch’s Ethernet port and provides
in-band management for all other switches in the fabric. Refer to the
SANbox2-8c/16 Switch Management User’s Guide for information about the
SANbox Manager application and its use.
In addition to SANbox Manager, the switch supports the following management
tools:
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Command Line Interface
File Transfer Protocol (FTP)
Simple Network Management Protocol (SNMP)
The command line interface provides monitoring and configuration functions by
which the administrator can manage the fabric and its switches. Refer to
Appendix B Command Line Interface for more information.
FTP provides the command line interface for exchanging files between the switch
and the management workstation. These files include firmware image files,
configuration files, and log files.
SNMP provides monitoring and trap functions for the fabric. SANbox2 firmware
supports SNMP versions 1 and 2, the Fibre Alliance Management Information
Base (FA-MIB) version 4.0, and the Fabric Element Management Information
Base (FE-MIB) RFC 2837. Traps are formatted using SNMP version 2.
59021-05 A
2-11
2 – General Description
Switch Management
ꢂ
Notes
2-12
59021-05 A
Section 3
Planning
Consider the following when planning a fabric:
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Devices
Multiple chassis fabrics
Performance
Device access
Fabric management
Fabric security
3.1
Devices
When planning a fabric, consider the number of devices and the anticipated
demand. This will determine the number of ports that are needed and in turn the
number of switches. Consider how many and what types of switches are needed.
Consider the distribution of public and private devices as well as targets and
initiators. Public devices have full Fibre Channel addressing capability, and
therefore can communicate with any other public device on the fabric. An F_Port
supports a single public device. An FL_Port can support up to 126 public devices
in an arbitrated loop.
Private devices do not have full Fibre Channel addressing capability, only the
Arbitrated Loop Physical Address (ALPA) portion. A TL_Port provides a proxy for
a loop of private initiator or target devices allowing communication with off-loop
public and private devices. Consider the number of private devices in the fabric
and the number of off-loop devices with which the private devices must
communicate.
I
A TL_Port can support up to 125 private initiator devices and maintain
communications with up to 64 off-loop target devices.
I
A TL_Port can support up to 124 private target devices and maintain
communications with up to 63 off-loop initiator devices.
The SANbox2-16 Fibre Channel switch uses SFP optical transceivers, but the
device host bus adapters you are using may not. Consider whether the device
adapters use SFP transceivers or Gigabit Interface Converters (GBIC), and
choose fiber optic cable accordingly. Use LC-type cable connectors for SFP
transceivers and SC-type cable connectors for GBIC transceivers.
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3 – Planning
Multiple Chassis Fabrics
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3.2
Multiple Chassis Fabrics
By connecting switches together you can expand the number of available ports for
devices. Each switch in the fabric is identified by a unique domain ID, and the
fabric will automatically resolve domain ID conflicts. Because the ports are
self-configuring, you can connect SANbox2-16 and other FC-SW-2 compliant
switches together in a wide variety of topologies.
3.2.1
Domain ID, Principal Priority, and Domain ID Lock
The following switch configuration settings affect multiple chassis fabrics:
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Domain ID
Principal priority
Domain ID lock
The domain ID is a unique number from 1–239 that identifies each switch in a
fabric. The principal priority is a number (1–255) that determines the principal
switch which manages domain ID assignments for the fabric. The switch with the
highest principal priority (1 is high, 255 is low) becomes the principal switch. If the
principal priority is the same for all switches in a fabric, the switch with the lowest
WWN becomes the principal switch.
The domain ID lock allows (FALSE) or prevents (TRUE) the reassignment of the
domain ID on that switch. Switches come from the factory with the domain ID set
to 1, the domain ID lock set to FALSE, and the principal priority set to 254. Refer
to the SANbox2-8c/16 Switch Management User’s Guide for information about
on page B-25 for information about changing the default domain ID, domain ID
lock, and principal priority parameters.
An unresolved domain ID conflict means that the switch with the higher WWN will
isolate as a separate fabric, and the Logged-In LEDs on both switches will flash to
show the affected ports. If you connect a new switch to an existing fabric with its
domain ID unlocked, and a domain ID conflict occurs, the new switch will isolate
as a separate fabric. However, you can remedy this by resetting the new switch or
taking it offline then back online. The principal switch will reassign the domain ID
and the switch will join the fabric.
Note:
Domain ID reassignment is not reflected in zoning that is defined by
domain ID/port number pair or Fibre Channel address. You must
reconfigure zones that are affected by domain ID reassignment. To
prevent zoning definitions from becoming invalid under these
conditions, lock the domain IDs using SANbox Manager or the Set
Config Switch command.
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3.2.2
Common Topologies
This section describes three commonly used topologies:
Cascade
Mesh
Multistage®
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3.2.2.1
Cascade Topology
A cascade topology describes a fabric in which the switches are connected in a
linear fashion. If you connect the last switch back to the first switch, you create a
because any switch can route traffic in the shortest direction to any switch in the
loop. The loop also provides failover should a switch fail.
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Each chassis link contributes up to 200 MB/s of bandwidth between chassis,
400 MB/s in full duplex. However, because of the sequential structure, that
bandwidth will be shared by traffic between devices on other chassis.
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Latency between any two ports is no more than three chassis hops.
48 Fibre Channel ports are available for devices.
Figure 3-1. Cascade-with-a-Loop Topology
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