Fibre Channel to SCSI Router PSFR-CP41
Installing, Starting Up and Maintaining
Edition April 1999
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Copyright and Trademarks
Copyright © Siemens AG 1999.
All r ights reserved.
Delivery subjec t to availability; r ight of technical modifications reserved.
All hardware and software names used are trademarks of their respective manufacturers.
This manual is printed
on paper treated with
chlorine-free bleach.
Introducing the PSFR-CP41
The PSFR-CP41 provides connectivity between a Fibre Channel Switched
Fabric (FC-SW) or Arbitrated Loop (FC-AL) and one Fast/Wide/Ultra SCSI bus.
Supported devices include:
Initiator Devices – Fibre Channel and SCSI hosts
Sequential Access Devices – Tapedrives
Changer Devices – Tape and Magneto-Optical Libraries
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Features Introducing the PSFR-CP41
Front panel of the PSFR-CP41
SCSI
Serial
FibreChannel
Power Entry Module
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Power
Fault
LEDs 10 Base-T
Ethernet
SCSI
Ethernet
FC
Back panel of the PSFR-CP41
Features
Fibre Channel Features
– Fibre Channel initiator and target modes
– Single 1.0625 Gbps port
– Fibre Channel Arbitrated Loop and Switched Fabric topologies
– Private Loop Direct Attach (PLDA) profile compliant
– Class 3 connection with SCSI-FCP protocol
– Optical GLM
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Introducing the PSFR-CP41 Features
SCSI Bus Features
– SCSI initiator and target modes
– Single auto-negotiating SCSI bus (Narrow, Wide, Fast, Ultra)
– Ultra Wide SCSI for data transfer up to 40 MBps
– Connection for up to 15 devices
– Simultaneous commands, tagged command queuing and
disconnect/reconnect
– Middle of bus configuration with active, external termination
– SCSI-2 and SCSI-3 protocols
– 68-pin D shell, P type connectors
– Differential
– Disk, tape, optical and changer devices
– SCC, Indexed and Automatic addressing modes
Configuration Features
– Serial RJ-11 connector for terminal access
– Ethernet RJ-45 connector for FTP, Telnet and Web browser access
– Easy field-upgradable firmware
Management Features
– Out-of-band Ethernet TCP/IP
– SNMP with public and private MIB support
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Specifications Introducing the PSFR-CP41
Specifications
Physical Specifications
– Internal power supply with power switch and detachable power cord
– Fibre Channel activity LED
– SCSI activity LED
– Ethernet activity LED
– Power LED
– Failure LED
– Airflow with internal fan
– Rack mount or desktop enclosure
Physical Dimensions
– Width 43.18cm (17.00 inches)
– Depth 22.82cm (8.98 inches)
– Height 4.31cm (1.70 inches, 1U)
– Weight 3.18 kg (7 lbs)
Operating Environment
–5to40°C
– 5 to 80% Relative Humidity (non-condensing)
Non-operating Environment
– -40 to +55 °C
– 0 to 92% Relative Humidity (non-condensing)
Power
– 100 - 240 VAC, Auto Sensing
– 50/60 Hz, 1.0 Amps
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Introducing the PSFR-CP41 PSFR-CP41 Benefits
PSFR-CP41 Benefits
Point-to-Point
Single initiator to single target
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PSFR-CP41 Benefits Introducing the PSFR-CP41
Single Initiator
Single initiator to multiple targets
Multi-Initiator
Multiple initiators to single or multiple targets
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Introducing the PSFR-CP41 PSFR-CP41 Benefits
Availability
With two units, dual loop attachment provides redundancy and no single
point of failure.
Connectivity
SCSI devices may be attached to Fibre Channel storage networks to share
data and increase address space.
Distance
SCSI cablelength from hosts to devices is increased from 25m to 10,000m,
facilitating remote or disaster tolerant sites.
Performance
100 Mbytes/sec Fibre Channel (200 Mbytes/sec bi-directional) offers
increased bandwidth when distributing data across multiple SCSI devices.
Reliability
Low error rates, robusterror recovery and flow control provide an enterprise
with reliable data delivery.
Scalability
Point-to-point links can be expanded to multi-initiator links supporting inter-
connected servers, tape drives, tape libraries, disk drives and disk arrays.
Flexibility
The PSFR-CP41 allows Fibre Channel initiators to communicate with SCSI
targets, as well as SCSI initiators to communicate with Fibre Channel
targets, simultaneously.
Consolidation
The PSFR-CP41 allows multiple serversto share tape drives,tape libraries,
disk drives and disk arrays.
Centralization
The PSFR-CP41 enables existing storage to be movedto a central location
to simplify management and maintenance, and to improve security.
Lower TCO
Improving storage management, maintenance and security can lower Total
Cost of Ownership (TCO) for enterprise storage.
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How the PSFR-CP41 Works Introducing the PSFR-CP41
How the PSFR-CP41 Works
The PSFR-CP41 acts as a pass-though device that translates Fibre Channel
FCP to and from a SCSI bus so devices on these two types of media can
communicate with each other. It attaches to either a Fibre Channel or SCSI
host, and transfers the command, data, and status information to SCSI or Fibre
Channel targets. The host passes packets to SCSI or Fibre Channel targets as
if the PSFR-CP41 were just another device along the path.
The PSFR-CP41 provides connections for a single SCSI bus and a Fibre
Channel Arbitrated Loop or Switched Fabric. It takes advantage of Fibre
Channel’sability to encapsulateSCSI protocolpacketsto allow a host with a FC
or SCSI adapter to access SCSI or FC peripheral devices transparently over a
FC connection.
Fibre Channel-to-SCSI configuration
The figure shows a Fibre Channel-to-SCSI configuration. Through the PSFRCP41 router, any host on the Fibre Channel loop can access the tape driveand
library on the SCSI bus.
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Introducing the PSFR-CP41Operating as Both a SCSI and Fibre Channel D
e
Operating as Both a SCSI and Fibre Channel Device
The router is both a SCSI and Fibre Channel device operating on a SCSI bus
and Fibre Channel network simultaneously.
The SCSI Side
On the SCSI bus, the PSFR-CP41 acts as a SCSI initiator passing requests
fromhosts onthe FibreChannel network to target deviceson the SCSI bus.The
PSFR-CP41 uses a single SCSI ID. The default ID is 7 and can be changed
when configuring the PSFR-CP41.
The Fibre Channel Side
Ina Fibre Channel loop,the PSFR-CP41isidentified by a single Arbitrated Loop
PhysicalAddress (AL_PA) or a fabric assigned Source ID. Once the address is
acquired, any host on the Fibre Channel loop can access the devices on the
SCSI bus transparently over a FC connection.
Mapping Devices
To allow Fibre Channel and SCSI devices to address each other, the PSFRCP41 creates a table that maps device identifiers between Fibre Channel and
SCSI. During PSFR-CP41 configuration, you can choose the mapping method
and, in certain cases, customize the device mappings. See Chapter “Understanding the PSFR-CP41 Configuration” for more information about address
modes and their configurations.
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Processing SCSI Information Introducing the PSFR-CP41
Processing SCSI Information
The following describes how the router processes SCSI information:
1. A FC host issues a command. The FC host encapsulates the command in
the FCP protocol and sends the packet to the PSFR-CP41.
2. The FC port in the PSFR-CP41 receives the packet, interprets the FC information, and places the packet in buffer memory.
3. The PSFR-CP41’sprocessor interprets the information and programs the
SCSI controller to process the transaction.
4. The SCSI controller sends the command to the SCSI device (target).
Information processing
5. The target interprets the command and prepares to either read or write data.
6. Data flows between the host and target through buffer memory.
7. Response information flows from the SCSI target back to the FC host.
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Introducing the PSFR-CP41 Processing Fibre Channel Information
Processing Fibre Ch annel Information
The PSFR-CP41 processes information from the SCSI bus host by requesting
operations of targets on a Fibre Channel Storage Area Network (SAN). The
information is processed using the same method as described in the previous
section, except it begins with the SCSI host bus issuing commands and the
information passing through the PSFR-CP41 to the FC SAN.
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Installing the PSFR-CP41
This chapter describes how to setup and install the PSFR-CP41. This includes
unpacking the PSFR-CP41 for the first time, factors to consider when installing
the PSFR-CP41, either desktop or rackinstallation instructions, andconnecting
to different types of devices. Read this chapter carefully and completely before
working with the PSFR-CP41.
A number of factors need to be considered in planning the installation of the
PSFR-CP41. These factors include the location of the unit, the use of the unit,
and the type of devices to which the unit will be attached.
Location
The PSFR-CP41 Router can be placed on a desktop or mounted in a standard
19-inch rack depending on the specific requirements of the installation. The
operatingenvironment should meet the requirements found in Chapter 1. If you
plan to use the router on a tabletop,attach the stick-on feet to the bottom of the
router to protect the surface.
The PSFR-CP41 contains a cooling fan mounted in the rear of the
i
enclosure and intake vents on the front of the enclosure. The rear fan
vent and the front intake vents should remain clear of obstructions to
ensure proper airflow.
Unpacking the Box
1. Remove all items from the shippingcontainer.Check each one for damage.
Keep the PSFR-CP41 in the protective bag until you are ready to install it.
2. Refer to the packing slip or contents list to make sure you received all the
equipment you ordered. If an item is missing, contact your sales representative immediately.
3. Select a location that ensures the front intake vents and rear fan are clear of
obstructions so air flows freely through the router.
4. Do not connect any devices or cables to the PSFR-CP41 until the device is
secured in a rack or placed securely on a flat, level surface.
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Mounting the PSFR-CP41 in a Rack Installing the PSFR-CP41
Mounting the PSFR-CP41 in a Rack
Follow the directions below to mount the PSFR-CP41 in a standard rack.
Materials needed
1
4
2 3
1 = PSFR-CP41
2 = Left and right mounting rails
3=Sliderails
4 = Mounting screws and cage nuts
Required tools
Phillips screwdriver
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Installing the PSFR-CP41 Mounting the PSFR-CP41 in a Rack
Installation Procedure
Place the PSFR-CP41 so the rear fan vent and the front intake vents
i
remain clear of obstructions to ensure proper airflow.
1. Remove the router from the protective bag.
2. Determine where the PSFR-CP41 will be mounted.
3. Remove any blanking panels and other equipment from the chosen rack
location.
4. Install the cage nuts on the vertical mounting rails in the rear of the rack
cabinet.
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Mounting the PSFR-CP41 in a Rack Installing the PSFR-CP41
5. Locate the front of the mounting
brackets.
6. Attach the brackets to the front
mountingrails,using twoscrewson
each side. Be sure to use only the
top and bottom holes in each
bracket. (The middle holes will be
usedto attach the front coverpanel
after the unit is installed.) Tighten
the screws securely.
To reduce injury or equipment damage, the mounting brackets must be
!
level. If the brackets are not level, the PSFR-CP41 cannot be installed
correctly.
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Installing the PSFR-CP41 Mounting the PSFR-CP41 in a Rack
If you are mounting the PSFR-CP41 in the front of the rack with the connectors
facing the back or in the back of the rack with the connectors facing the front,
attach the mounting brackets as shown in Fig. “Mounting at front of rack”.
Mounting at front of rack
If you are mounting the PSFR-CP41 in the front of the rack with the connectors
facing the front or in the back of the rack with the connectors facing the back,
attach the ears as shown in Fig. “Mounting at back of rack”.
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Mounting the PSFR-CP41 in a Rack Installing the PSFR-CP41
Mounting at back of rack
7. Attach each bracket to a rear
mounting rail, using one screw on
each side. Tighten the screws
securely.
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Installing the PSFR-CP41 Mounting the PSFR-CP41 in a Rack
8. Attach the slide rails to the PSFR-CP41 using two screws on each side.
Slide the unit back into the rack and push in on the front tabs until the rails
snap into place.
Once the PSFR-CP41 is installed, you are ready to connect it to the other
system components.
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Mounting the PSFR-CP41 in a Rack Installing the PSFR-CP41
Interfaces and Connections
There are four different types of physical interfaces to the PSFR-CP41:
Fibre Channel
SCSI
RS-232 (Serial port)
Ethernet
The RS-232 and Ethernet ports are used primarily for PSFR-CP41 configurationand management. MIB information foreach interfaceis discussed later in
this chapter.
Port locations
S erial Port
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Ethernet
Port
SCSI Port
Fibre Cha nnel
Port
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Installing the PSFR-CP41 Mounting the PSFR-CP41 in a Rack
Fibre Channel Connection
Before connecting the PSFR-CP41 to other Fibre Channel devices, it is
important to understand the configuration requirements of the environment to
which it will be connected. Failureto correctly configure a Fibre Channel device
may impair the operation of the storage area network to which it is attached.
Typicalinstallations will havethe PSFR-CP41 connected to either an Arbitrated
Loop or Switched Fabric environment. For an arbitrated loop, the unit can be
directly attached to the Fibre Channel host bus adapter or target device, in a
point to point fashion. Arbitrated loops also allow for the use of Fibre Channel
hubs, to which the unit can be directly attached. In Fibre Channel switched
environments, the switch is directly attached to the PSFR-CP41.
Both switches and hubs may allow for individual ports to be configured for
differentmedia types. The PSFR-CP41 must be connected to the hub or switch
port with the appropriate cabling for the media type in use on both the PSFRCP41 and the port to which it is connected.
The PSFR-CP41 supports various Fibre Channel media types through the use
ofan internalGigabaud Link Module (GLM). Thismodule isfactory installed and
may be selected when ordering the unit.
Available media types include:
Multi-Mode Fiber Support - 1.0625 Gbaud Dual SC connectors
Single-Mode Fiber Support - 1.0625 Gbaud Dual SC connectors
To connect the PSFR-CP41 to the Fibre Channel Storage Area Network:
1. Remove the protective covers from the PSFR-CP41’s Fibre Channel
connectors.
2. With the PSFR-CP41 powered off, connect the PSFR-CP41 into your Fibre
Channel environment using the appropriate cabling. The connectors on the
PSFR-CP41 are keyed.Be sure to insert the cable connectors in the proper
orientation.
You may need to use an adapter to match the type of Fibre Channel
i
cabling and connector used by the router. See Appendix A for cable
specifications.
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Mounting the PSFR-CP41 in a Rack Installing the PSFR-CP41
S
SCS
Fig. “Fibre Channel connection”
shows the Fibre Channel port on the
back of the PSFR-CP41.
Fibre Channel connection
SCSI Connection
The PSFR-CP41 supports Fast/Ultra Wide SCSI. The PSFR-CP41 is factory
configured to support Differential SCSI bus. Two68-pin D-shell connectors are
located on the rear panel of the unit, allowing the unit to be attached in the
middle or at the end of a SCSI bus. If the PSFR-CP41 is located at one end of
the SCSI bus, an external terminator should be installed. A terminator is
provided with the PSFR-CP41.
CS I
DIFF
Differential
Isupportis indicated bythis symbolon the
rear of the 6100.
The PSFR-CP41 supplies termination power (TERMPWR) on the SCSI bus. A
self-resetting fuse is used that will reset after the fault is cleared.
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Installing the PSFR-CP41 Mounting the PSFR-CP41 in a Rack
To connect the PSFR-CP41 to the SCSI bus:
1. Power off your SCSI devices.
2. Connect a SCSI cable to one of the SCSI connectors on the back of the
router. If necessary, use a narrow-to-wide adapter.
3. Connect the other end of the SCSI cable to the next SCSI device on the bus.
4. If the PSFR-CP41 is at the end of the SCSI bus, place the terminator
provided with the router on the PSFR-CP41’s other SCSI connector. If the
router is not at the end of the bus, attach a second SCSI cable to the other
SCSI connector. Use a narrow-to-wide adapter, if necessary. Connect this
cable to the next device on the bus.
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SCSI Connectors
PSFR-CP41 SCSI connection
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Mounting the PSFR-CP41 in a Rack Installing the PSFR-CP41
5. Make sure the bus is terminated
correctly. The devices at each end
of the bus must be terminated.
SCSI terminator
6. Power on your SCSI devices.
7. After all the SCSI devices havecompleted their individual POSTs, power on
the PSFR-CP41.
Ethernet Connection
10BaseT Ethernet connectivity is used to provide enhanced management and
configuration capabilities. The RJ-45 connector on the unit can be directly
connected to a standard 10BaseT Ethernet network.
You mustfirst set the network address via theserial port to use the configuration
capabilitiesof the Ethernetport.Referto Chapter “Configuringthe PSFR-CP41”
for details on setting the network address.
Ethernet capabilities include Telnet and HTTP Interface (Web Browser) for
configuration, FTP and TFTP for firmware upgrades, and SNMP for configuration and management.
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Installing the PSFR-CP41 Mounting the PSFR-CP41 in a Rack
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Ethernet port
PSFR-CP41 Ethernet port
Serial Port Connection
The RJ11 connector on the rear panel of the PSFR-CP41 provides an RS-232
connection that can be used to configure the PSFR-CP41, monitor diagnostic
status, or to update the program stored in the PSFR-CP41’s Flash memory. A
cable is provided with the unit to connect to a DB-9 serial connection. Further
information on the operations allowed via the RS-232 port is provided in
Chapter “Configuring the PSFR-CP41”.
The RS-232 port operates with the following settings:
Baud Rate: Autobaud (9600, 19200, 38400, 57600, or 115200)
Data Bits: 8
Stop Bits: 1
Parity: None
Flow Control: None
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Mounting the PSFR-CP41 in a Rack Installing the PSFR-CP41
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Serial port
PSFR-CP41 Serial port
Autobaud Feature
The autobaud feature automatically configures the baud rate on the PSFRCP41. Once you set the baud rate in the terminal emulation program, wait until
thePSFR-CP41completesthePowerOnSelfTest(POST).Thiscantake
approximately 25 seconds. Then press the Enter key five or six times and the
PSFR-CP41 will automatically detect the baud rate and configure the router.
The baud rate is then saved in the PSFR-CP41’s configuration and will be
retained through future power cycles.
Hitting the Enter key before the POST has completed has no effect on
i
the autobaud feature. Wait until the POST has completed before hitting
the ENTER key.
The baud rate in the terminal emulation program must be set at 9,600, 19,200,
38,400, 57,600, or 115,200 for the autobaud feature to recognize it. The PSFRCP41 will not function properly at any other baud rate.
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Installing the PSFR-CP41 Mounting the PSFR-CP41 in a Rack
Connecting the Power Cord
The power cord shipped with the PSFR-CP41 is a 120 VAC three-conductor
power cord for use in the United States or Canada. If you are planning to use
another input voltage or if you plan to use the PSFR-CP41 outside of the U.S.
or Canada, you must supply your own power cord.
To connect the power cord to the PSFR-CP41:
1. Make sure the PSFR-CP41’s power is switched off. See Fig. “PSFR-CP41
power switch and outlet” for the location of the power switch on the back of
the router.
2. Connect the female end of the power cord to the power connector on the
back of the PSFR-CP41.
3. Plug the male end of the power cord into the power source.
Power outlet
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Power switch
PSFR-CP41 power switch and outlet
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Management Information Base (MIB) Installing the PSFR-CP41
Management Information Base (MIB)
A MIB (Management Information Base) is an element used in network
management with SNMP (Simple Network Management Protocol) and a
management station running a management application, such as Hewlett
Packard’s Open View. The management application uses GETs and SETs to
get system information and set system environment variables.
The private MIB can be accessed via Ethernet and is both a diagnostic and a
configuration tool for the PSFR-CP41.
The following sections outline what MIB information is available for each
interfacetype on the PrivateMIB.Formore informationonaccessing the Private
MIB, contact a support representative.
MIB Fibre Channel Interface Information
FibreChannel datareportedincludes frame and packet information, upperlayer
protocol (ULP) type (FCP or IP), and other Fibre Channel specific information.
Draft MIBs for Fibre Channel N_Ports and F_Ports are in the public domain.
The private MIB includes:
Groups for Fibre Channel configuration
Fibre Channel port physical table
Fibre Channel port statistics
SCSI-to-Fibre Channel mapping
Fibre Channel-to-SCSI mapping
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Installing the PSFR-CP41 Management Information Base (MIB)
MIB SCSI Interface Information
TheMIB gathers SCSI information for management purposes. This specificMIB
provides information about the following:
Number of I/O operations per bus
Number of disconnects
Abort count
Number of bus resets
Vital Product Data (VPD) from Inquiry command for each SCSI device
SCSI configuration information
This information can be found in the S CSI S tatistics Table, SCSI Config Group,
and the SCSI Product Data Groups of the private MIB.
MIB Ethernet and Serial Interfaces Information
TheEthernet interfaceis used forconfigurationand management, sototal traffic
flow is relatively low. The basic Ethernet configuration items are found in the
Management Interfaces (MI) Table.
The serial port is provided for user configuration. The serial port baud rate will
be kept in the MI Table.
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Understanding the PSFR-CP41 Configuration
Of primary importance in configuring the PSFR-CP41 is determining the mode
of operation required. The unit can be configured to support Fibre Channel
hosts communicating with SCSI targets, or SCSI hosts communicating with
Fibre Channel targets. The default configuration of the unit allows for Fibre
Channel hosts to connect to SCSI targets. Configuration is needed in some
cases to modify the method in which this occurs, as well as to support SCSI
hosts communicating with Fibre Channel targets. Other functions and features
can be configured as well, and are discussed further in this chapter.
A typical configuration would have a Fibre Channel host connecting via an
arbitrated loop to the PSFR-CP41, with SCSI target devices attached to the
PSFR-CP41. This configuration, using a tape library and drives, is represented
in Fig. “Configuration with tape library”.
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Understanding the PSFR-CP41 Configuration
The factory default configuration of the unit allows such a configuration to work
without further configuration in most cases. It should, however, be recognized
thatmore complex installations orspecific application requirements mayrequire
one or more configuration elements to be changed from the default settings.
Configuration with tape library
An understanding of the basic characteristics of Fibre Channel and SCSI
devices is recommended before configuring the PSFR-CP41.
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Understanding the PSFR-CP41 ConfigurationGeneral Fibre Channel Config
u
General Fibre Channel Configuration
On a Fibre Channel arbitrated loop, the PSFR-CP41 appears at a single
Arbitrated Loop Physical Address (AL_PA).Fibre Channel devices support two
methods for obtaining an AL_PA, these being soft or hard addressing. The
PSFR-CP41 can be configured to use soft addressing (default) or hard
addressing with a selected value.
Soft Addressing
Whenacquiring a soft address, the PSFR-CP41 acquires the first availableloop
address starting from address 0. In this mode, the PSFR-CP41 automatically
obtains an available address and participates on the loop, as long as there is at
least one address available on the loop that is connected to the PSFR-CP41.
Fibre Channel supports up to 126 devices on an arbitrated loop.
Hard Addressing
Whenacquiring a hard address, the PSFR-CP41 attempts toacquire the AL_PA
value that was specified by user configuration. If the desired address is not
available at loop initialization time, the PSFR-CP41 comes up on the loop in
non-participating mode. This allows the loop to continue to operate, although
the unit will not be accessiblevia the Fibre Channel interface. This would occur
when another device on the arbitrated loop has acquired the same address as
that configured on the PSFR-CP41.
Hard addressing is recommended for environments where it is important that
the device addresses do not change. Device address changes can affect the
mapping represented by the host operating system to the application, and have
adverse effects. An example of such an environment would be a tape library
installation, where the application configuration requires fixed device identification for proper operation. Hard addressing will insure that the device identification to the application will remain constant.
When connected to a Fibre Channel Switch, the PSFR-CP41 is identifiedto the
switch as a unique device by the factory programmed World Wide Name
(WWN). No further configuration is needed, although the WWN can be
configured to a user-defined value through the configuration interface.
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General SCSI Configuration Understanding the PSFR-CP41 Configuration
General SCSI Configuration
The PSFR-CP41 appears on the SCSI bus as a single initiator. The default
initiator ID is 7, and can be set via configuration to any valid SCSI address. No
other devices on the SCSI bus may use this address.
The PSFR-CP41 provides the capability to reset the SCSI bus during the boot
cycle. This allows the devices on the SCSI bus to be in a known state. Configuration allows this feature to be enabled or disabled. This feature is enabled in
the default configuration. Configurations using multiple initiators, changers, or
other devices that have long reset cycles, or are adversely affected by bus
resets, should disable this feature.
The PSFR-CP41 negotiates for the maximum values for transferrates and data
width on the SCSI bus. If an attached device does not allow the full rates, the
unit will use the rates negotiated for that device. Negotiation is on a device
specific basis, so the unit can support a mix of device types on the same bus.
Fibre Channel Host to SCSI Target Configuration
This section describes the configuration of the PSFR-CP41 when acting as a
target to a FibreChannel Initiator,passingFCP requests through to SCSI target
devices.
This is configured as the default, using soft addressing on the Fibre Channel
loop and auto addressing for the target device mapping. Auto addressing is
described further in this section.
The PSFR-CP41 automatically detects if it is connected to a loop or a switch,
and will use the appropriate type without further configuration.
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Understanding the PSFR-CP41 Configuration Address Mapping
Address Mapping
The PSFR-CP41 supportsthree addressing methods for mapping SCSI targets
to Fibre Channel Hosts:
Indexed Addressing
mapping table.
Auto Addressing
every time the PSFR-CP41 is power cycled.
SCC Addressing
storage array addressing to address SCSI devices attached to the PSFRCP41.
SCSITargets areselected by mappingthe appropriate values into the FCP LUN
field, and correlating a Fibre Channel LUN value to a SCSI Bus:Target:LUN
value.The PSFR-CP41 acts as a single initiator on the SCSI bus, defaulting to
ID 7. All commands passed through to the SCSI bus originate from this SCSI
ID.
– Allows you to edit and maintain a static address
– Automatically creates a new address mapping table
– Implements the SCSI-3 Controller Commands SCSI
Indexed Addressing
IndexedAddressing allows for generic Fibre Channel host bus adapters to
accessSCSI devices attached tothe PSFR-CP41.This is done by use of a table
which is indexed by sequential FCP LUN values, indicating selected
BUS:TARGET:LUN devices.
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Indexed Addressing Understanding the PSFR-CP41 Configuration
FCP LUN Value SCSI BUS:TARGET:LUN
0 0:0:0
1 0:1:0
2 0:2:0
3 0:3:0
4 0:4:0
5 0:5:0
6 0:6:0
0:7:0 occupied by initiator ID
7 0:8:0
(...) (…)
14 0:15:0
15 0:0:1
16 0:1:1
(...) (…)
Indexed Addressing table
The Indexed Addressing table has the structure shown in Table. The PSFRCP41 will allow up to 80 device entries to be mapped. The index table can be
manually edited, and is then saved to FLASH memory. Configuration assists
allow for the table to be filled in order of increasing target, or LUN, as may be
desired for the specific requirements needed. An assist is also provided to
perform device discovery, and fill the table in the order that devices are
discovered on the SCSI bus.
Indexed Addressing mode is recommended for environments where device
configuration may change, and a fixed mapping from the application to the
targetdevicesis required. Anexampleof suchan environment is where hot plug
devices may be used, thereby changing the order of devices on the SCSI bus.
Operating Manual U42093-J-Z716-1-74
Understanding the PSFR-CP41 Configuration Auto Addressing
Auto Addressing
The Auto Addressing option is similar to Indexed Addressing, but with the
distinction that the table used is created through SCSI device discovery upon
power up or reset, and not otherwise retained. As the unit performs device
discovery on the SCSI bus, the Index table is filled with adjacent FCP LUNs
referencing each subsequent SCSI device. The host system will then detect
every attached device without voids, allowing full device discovery to the host.
This allows easy configuration in environments where device ordering is not
important, and hot plugging of SCSI deviceswill not occur. Configuration allows
for discovery to be performed in order of target or LUN, as desired for the
specific environment.
Auto Addressing, target mode is configured as the default mode of the PSFRCP41.
SCC Addressing
The PSFR-CP41 implements the SCSI-3 Controller Commands (SCC) (X3T10
Project 1047D Revision 6b 01-July-96) SCSI storage array addressing to
address SCSI devices attached to the PSFR-CP41. The Access Method used
is the SCC Logical Unit Addressing method.
In SCC Addressing mode, the PSFR-CP41 will respond to FCP commands, as
in a SCC controller device.A subset of the SCC behavior is implemented. LUN
mappings corresponding to the SCC Peripheral Device Addressing are interpreted as controller commands, and are acted on by the PSFR-CP41 directly.
LUNmappings using SCC Logical Unitaddressing are routed to theappropriate
SCSI BUS:TARGET:LUN and processed accordingly.
Further description of the PSFR-CP41 implementation of SCC addressing is in
Appendix B.
U42093-J-Z716-1-74 Operating Manual
Configuring the PSFR-CP41
The PSFR-CP41 uses a menu structure to configure the PSFR-CP41 through
the serial and telnet interfaces. The currently selected menu and the firmware
version currently executing will be displayed. Menu items are selected by
entering the number of the menu desired, and exited by enter ing an ‘X’. In
general, the configuration options present in the serial interface correspond to
those available through SNMP and telnet.
Menus are not case sensitive. You can enter uppercase and lowercase
i
characters interchangeably when selecting from menus.
The PSFR-CP41Configuration Program allows the user to control many configuration settings through the PSFR-CP41 serial interface. Among these are:
Baud rate of the serial port
Fibre Channel address
SCSI initiator and target IDs
Ethernet IP and MAC addresses
Fibre Channel-to-SCSI mapping
SCSI-to-Fibre Channel mapping
Trace level settings
Configuration settings may be changed and saved.
Unless otherwise indicated, all configuration options set do not take
i
effect until the next boot cycle of the PSFR-CP41 unit.
U42093-J-Z716-1-74 Operating Manual
Operation Indicators Configuring the PSFR-CP41
Operation Indicators
The PSFR-CP41 router is equipped with rear panel LED indicators for
monitoring overall router status. The LED functionality is detailed below:
Power This green indicator turns on when power is applied to the
router.
Fault Thisamber indicator islitwhen thePSFR-CP41 detects afault
condition. Faults can occur as a result of Power-on Self Test
(POST) failure or operational failures.
SCSI This green indicator signifies SCSI activity when lit.
Ethernet This green indicator signifies Ethernet activity when lit.
Fibre Channel This green indicator signifies Fibre Channel activity when lit.
10 Bas
Power
Fault
SCSI
Ethernet
FC
ETHER
PSFR-CP41 LED’s
Operating Manual U42093-J-Z716-1-74
Configuring the PSFR-CP41 Host Device Configuration
Host Device Configuration
The host system using a Fibre Channel Host Bus Adapter (HBA) will typically
map Fibre Channel devices into the existing device mapping scheme used by
that operating system. This usually results in the Fibre Channel HBA mapping
Fibre Channel AL_PA’sto SCSI target addresses. The HBA will claim enough
SCSI bus entries to allow for 125 Fibre Channel targets to map to SCSI
Bus:Target entries. This is usually done by a fixed mapping of AL_PA to
Bus:Target. In such a configuration, the PSFR-CP41 corresponds to a
Bus:Target identifier, with the SCSI devices attached to the PSFR-CP41
appearingas logical units(LUNs). In addition,operatingsystems canextendthe
available SCSI limit of 15 per bus.
Althoughthis is not an issue for the operating system or most applications,there
are cases where older applications can haveexpectations about what are valid
SCSI ID’s, and not deal correctly with certain mappings. In particular,applications have been seen to have difficulties addr essing target ID’sgreater than 15
(e.g. 16 and up). This problem can be resolved by configuring the PSFR-CP41
to use hard addressing, and setting the AL_PA used by the unit to a value that
theHBAwillmaptoanIDwithavaluelessthan16.
For example, depending on the FC HBA, if the hard AL_PA selection is 1, the
addressis 1. If the selectionis 125, the AL_PA address is 0xEF.Some FCHBA’s
willconfigure differently, so verify theAL_PA by toggling to hard addressing and
selecting an address.
U42093-J-Z716-1-74 Operating Manual
Device Management Configuring the PSFR-CP41
Device Manag ement
The PSFR-CP41 can be managed through the RS-232 port, over Ethernet via
Telnet Web-Browser, or via SNMP. FTP and TFTP are also supported for
firmware downloads.
Serial
The serial port allows for configuration of all device characteristics.
Ethernet/Web-Browser
The 10BaseT Ethernet port must be configured with an appropriate IP address
and netmask prior to use. Default values are 1.1.1.1, with a mask of
255.255.255.0.
SNMP
The PSFR-CP41 includes SNMP management support. SNMP is transported
viatheEthernet connection(10BaseTport).SNMPsupportallowsconfiguration
and management using any standard SNMP management tool. SNMP data is
defined in the SNMP MIB. Provides a private MIB for configuration of the PSFRCP41. The private MIB includes all objects configurable from the terminal user
interface.The privateMIBalsoincludes some FibreChannel and SCSIstatistics
which are not accessible via the serial interface. SNMP support also includes
Traps, which are used to notify a SNMP management console of various conditions.
Currently the IETF has no publicly defined specification for a Fibre Channel
MIB. The objects defined in the private MIB are specific products.
For a copy of the private MIB, contact a service representative.
Operating Manual U42093-J-Z716-1-74
Configuring the PSFR-CP41 Communicating with the PSFR-CP41
Communicating with the PSFR-CP41
The PSFR-CP41 is designed to function directly out of the shipping container
with no special configuration required. However, you have the ability to monitor
various aspects of the PSFR-CP41’s performance by connecting a terminal or
terminal emulator to the serial port on the rear of the router.
The PSFR-CP41 is designed to communicate with any operating system that
utilizes a terminal emulator. For example, you can use Hyperterminal on
Windows NT 4.0. If your computer uses another operating system, be sure the
baud rate, data bits, stop bits, par ity,and terminalemulation are set asspecified
in the following Table.
Type Setting
Baud rate
Date bits 8
Parity None
Stop bits 1
Flow control None
Connection properties
*
For more information on the Autobaud feature, see Chapter “Installing the
PSFR-CP41”.
*
9600, 19200, 38400, 57600, or 115200
U42093-J-Z716-1-74 Operating Manual
Setting Up Serial Port Communications Configuring the PSFR-CP41
Setting Up Serial Port Communications
Leave the PSFR-CP41 turned off until you have set up serial port communications with your host computer.
To set up serial communications with the PSFR-CP41:
1. Plug the serial cable provided with the PSFR-CP41 into one of your
computer’s serial ports (for example, COM1 or COM2) and the PSFRCP41’s serial port.
2. Start your terminal interface program.
3. Set the terminal interface program to use the appropriate COM port.
4. Specify the following settings for the port:
Baud rate: 9600, 19200, 38400, 57600, or 115200
Data bits: 8
Parity: None
Stop bits: 1
Flow control: None
Before powering on the PSFR-CP41, make sure all the devices on the
i
SCSI bus are powered on and have finished performing their self tests.
The devices on your Fibre Channel Storage Area Network should be
poweredonalso.
5. Power on the PSFR-CP41.
Operating Manual U42093-J-Z716-1-74
Configuring the PSFR-CP41 Power Up Menu
d
d
d
d
d
d
d
d
d
Power Up Menu
When you turn the PSFR-CP41’s power switch,a series of messages similar to
the following appear:
erforming Power-on Self Test …
Monitor-flash Check-sum .................................. passe
Program-store Main RAM.................................... passe
Trace Buffer in Main RAM.................................. passe
PCI Protocol RAM (4mb).................................... passe
SCSI Script RAM........................................... passe
nitializing Ports..
Fibre-channel Port Single-frame Sequence Loopback......... passe
Fibre-channel Port Single-frame Sequence Loopback......... passe
Ethernet Port Loopback.................................... passe
SCSI Port Loopback........................................ passe
elf test completed successfully
elect which mode to boot :
1. Fibre Channel / SCSI Router
2. Diagnostics Monitor
If you do not see messages on your screen, re-check your computer’s serial
i
port settings and press Enter five or six times. In particular, make sure the
baud rate is set to one of the values listed in Table “Connection properties”.
The default boot mode is 1) Fibre Channel/SCSI Router and will be automatically selected if you wait three seconds. The main menu appears:
Crossroads Systems CP4100 Configuration
Version: X.X XXXX
1) Perform Configuration
2) Display Status of Power-on Self Test
3) Display Trace and Assertion History
4) Reboot
5) Download a New Revision of the Firmware
Command >
The main menu allows for various operations to be performed on the PSFRCP41.
U42093-J-Z716-1-74 Operating Manual
Perform Configuration Configuring the PSFR-CP41
Perform Configuration
The configuration menu allows the administrator to configure the various
options on the PSFR-CP41. For any configuration changes to take effect, you
must reboot the PSFR-CP41.
Menus are not case sensitive. You can enter uppercase and lowercase
i
characters interchangeably when selecting from menus.
Configuration Menu
Version: X.X XXXX
1) Baud Rate Configuration
2) Fibre Channel Configuration
3) SCSI Configuration
4) Ethernet Configuration
5) Fibre Channel to SCSI Mapping Configuration
6) SCSI to Fibre Channel Mapping Configuration
7) Trace Settings Configuration
A) Save Configuration
B) Restore Last Saved Configuration
C) Reset Configuration to Factory Defaults
X) Return to main menu
Baud Rate Configuration
This option changes the baud rate used on the serial port. Select 1) – 5) for
appropriate baud rate setting.
Baud Rate Configuration Menu
Version: X.X XXXX
1) 9600 2) 19200
3) 38400 4) 57600
5) * 115200
X) Return to previous menu
Operating Manual U42093-J-Z716-1-74
Configuring the PSFR-CP41 Perform Configuration
Fibre Channel Configuration
This option allows forsetting the Fibre Channel Address method, hard address
value, and WWN overrides.
Fibre Channel Configuration Menu
Version: X.X XXXX
Current Fibre Channel Configuration:
World Wide Name High: 0x10000011
World Wide Name Low: 0x10000001
Use Hard ALPA: No
1) Change World Wide Name High
2) Change World Wide Name Low
3) Toggle Hard ALPA Usage
X) Return to previous menu
When configuring the Fibre Channel AL_PA,the PSFR-CP41 will present a list
of loop addresses along with the corresponding AL_PA. The user selects the
loop address desired.
SCSI Configuration
This option allows for setting the SCSI Initiator ID, enabling SCSI Target IDs,
and setting the SCSI bus reset behavior.
SCSI Configuration Menu
Version: X.X XXXX
Current SCSI Configuration:
Initiator SCSI ID: 7
Target SCSI ID(s):
Reset SCSI Bus on Boot: Yes
1) Change Initiator SCSI ID
2) Add Target SCSI ID
3) Remove Target SCSI ID
4) Toggle SCSI Reset Operation
X) Return to previous menu
U42093-J-Z716-1-74 Operating Manual
Perform Configuration Configuring the PSFR-CP41
When mapping SCSI Target ID’s for SCSI host to Fibre Channel Target
capability, the user must first enable the target ID before proceeding to modify
the mapping table for that device.
Ethernet Configuration
This option allows for the network IP address and mask to be set, as well as
allowing the Ethernet MAC address to be overridden.
Ethernet Configuration Menu
Version: X.X XXXX
Current Ethernet Configuration:
Ethernet Physical Address : 30:30:45:30:30:32
IP Address : 38.152.100.150
Subnet Mask : 255.255.255.0
1) Change Ethernet Physical Address
2) Change IP Address
3) Change IP Subnet Mask
4) Change SNMP Settings
5) Change Security Settings
X) Return to previous menu
Fibre Channel-to-SCSI Mapping Configuration
Thisoption allows selectingthe addressingmode ofthe PSFR-CP41, as wellas
displayingattached devices. The menu to modify the Indexed addressing table
is also accessed through this menu.
When configuring Indexed addressing, the user is presented a table with the
current mappings. The user can then select a table entry by FCP LUN and
specifythe associatedBUS:TARGET:LUN.Alternately, theuser canfill withone
of multiple preset patterns, or with the list of currently attached SCSI devices.
The user then saves these values in FLASH memory, where they are retained
across future device resets or power cycles.
Operating Manual U42093-J-Z716-1-74
Configuring the PSFR-CP41 Perform Configuration
Fibre Channel to SCSI Configuration Menu
Version: X.X XXXX
Current Fibre Channel to SCSI Mapping Mode is Indexed
) Display Attached SCSI Devices, LUN Priority
) Display Attached SCSI Devices, Target ID Priority
) Display Attached SCSI Devices, Bus Number Priority
) Change the Fibre Channel to SCSI Mapping Mode
) Show/Edit Fibre Channel to SCSI Mapping Table
) Return to Previous Menu
SCSI-to-Fibre Channel Mapping Configuration
This option allows modification of the table mapping SCSI Target:LUN values to
Fibre Channel Node:LUN values.
Configuration of these devices is similar to that for indexed addressing, without
the user assists. Prior to configuring these tables, the user must enable the
SCSItarget and initiatoraddresses desired to enablethe mapping for that SCSI
device.
This is not used in Siemens Configurations.
Trace Settings Configuration
This option allows trace levels to be set. This should not be modified in normal
operation, as performance degradation may result.
Trace Settings
Version: X.X XXXX
Level0:ON Level1:ON
Level 2 : OFF Level3:OFF
Level 4 : OFF Level5:OFF
Level 6 : OFF Level7:OFF
U) Update Current Operating Trace Levels
X) Return to previous menu
Further information on using this interfacecan be locatedin the troubleshooting
section of the manual.
U42093-J-Z716-1-74 Operating Manual
Perform Configuration Configuring the PSFR-CP41
Save Configuration
This option saves the current configuration state in FLASH, and updates the
saved previous configuration state.
Restore Last Saved Configuration
Thisoption restores the most recentpreviouslysavedconfiguration.This canbe
useful when configuration changes are made, but the user wishes to return to
the previously configured state.
Reset Configuration to Factory Defaults
This option resets all configuration options to the factory defaults.
Operating Manual U42093-J-Z716-1-74
Configuring the PSFR-CP41 Display POST Status
Display POST Status
This option displays the results of the most recent power on self test (POST).
The POST test results are shown below.
Status of Power-on Self Test
Version: X.X XXXX
Serial Port Loopback ............................ passed
Monitor-flash Checksum........................... passed
Program-store Main RAM .......................... passed
Trace Buffer in Main RAM ........................ passed
PCI Protocol RAM ................................ passed
SCSI Script RAM ................................. passed
Fibre-channel Port Single-frame Sequence Loopback .... passed
Fibre-channel Port Multi-frame Sequence Loopback ..... passed
Ethernet Port Loopback .......................... passed
SCSI Port Loopback .............................. passed
Press Any Key to Continue...
Display Trace and Assertion History
This option allows for internal trace state information to be dumped to the serial
port and captured. This is useful to debug installation issues, and can be
provided for failure analysis. Further information on using this interface can be
located in the troubleshooting section of this manual.
Trace Dump Menu
Version: X.X XXXX
1) Display trace for current boot cycle
2) Display trace from previous boot cycle
3) Display trace from last assertion failure
4) Display history of assertion failures
5) Clear current trace buffer
X) Return to previous menu
U42093-J-Z716-1-74 Operating Manual
Reboot Configuring the PSFR-CP41
Reboot
The reboot function restarts the PSFR-CP41. This will cause selected configuration options to take effect.
This will result in all current operations being interrupted. Do not reboot
the unit during normal operation.
Download Firmware
The PSFR-CP41 uses a serial connection using the XMODEM protocol to
update the firmware. In order to update the firmware the PSFR-CP41 must be
connected to a terminal emulation program supporting XMODEM transfers.
This menu item does not appear when accessing the configuration menus
through telnet.
Fromthe main menu, the user must select the ”Download a new revision of the
Firmware” command to start the download procedure.
To download firmware:
Once the message ”Downloading” appears in the emulator utility:
1. Use the Transfer(Send File option in the ter minal emulator utility.
2. Select the location of the firmware. Usethe ”Browse” button, if you need
help finding it.
3. Make sure you select XMODEM as the protocol.
4. Press the ”Send” button.
5. The firmware will begin to download.
When the download is complete, the system verifies that the firmware image
was successfully written to the FLASH memory and then reboots the PSFRCP41. Upon reboot, the PSFR-CP41 detects that there is a newly downloaded
firmwareimage andcopies that image to the boot sector of the FLASH and then
boots with that image. At that point the PSFR-CP41 is using the new firmware
image.
Operating Manual U42093-J-Z716-1-74
Configuring the PSFR-CP41 Download Firmware
a
The following figure shows what you might see on your terminal when you
download a new revision of the firmware:
Crossroads Systems CP4100 Configuration
Version: X.X XXXX
1) Perform Configuration
2) Display Status of Power-on Self Test
3) Display Trace and Assertion History
4) Reboot
5) Download a New Revision of The Firmware
Command >
This will replace the current revision of the firmware.
A reboot will also be performed as part of this process.
Are you sure (Y/N)?
Please begin xmodem firmware transfer ...
________
Performing Power-on Self Test ...
(…)
Self test completed successfully
Select which mode to boot :
seconds left1:1
Verifying firmware checksum ...
Updating firmware ...
Target Name: Crosspoint
Attaching network interface lnPci0... done.
Attaching network interface lo0... done.
NFS client support not included.
Initializing sioc...
SCRIPTS start @ 0x88002000 (3520)
BRIDGE: Bridge Timed out SCSI Req on bus 0 target 0 lun 0. Check c
Initialized Successfully
Build Level: XXXX
5
Download Firmware Menu
y
(transmit Firmware image via XMODEM)
1. Fibre Channel/SCSI Router
2. Diagnostics Monitor
Dowloading a new revision of the firmware
U42093-J-Z716-1-74 Operating Manual
Configuring the PSFR-CP41’s Ethernet Port Configuring the PSFR-CP41
Configuring the PSFR-CP41’s Ethernet Port
If you plan to use Ethernet to configure the PSFR-CP41, you must first set up
serial communications with the PSFR-CP41 to configure the Ethernet port’s
address.
The PSFR-CP41 provides an Ethernet port for connection to a standard
10BaseTEthernet network. You can use Ethernet to perform the followingactivities:
Configure the PSFR-CP41 through Telnet.
accessed via the serial port will be disabled when a telnet session is
connected.When loggingin for a telnet session,use ”root” as the user name
and ”password” as the password.
Upgradingthe PSFR-CP41’s firmware.
new firmware image to the PSFR-CP41.
Ifyou plan to use the Ethernet port, youmust first configure itsaddress. You can
setthe physicaladdress, IP address,and IPsubnet mask. Thephysicaladdress
is assigned to an Ethernet adapter by its manufacturer. The IP address is used
to route information in a TCP/IP network. The IP subnet mask is used to
establish a path to a default TCP/IP gateway.
To change the Ethernet physical address, IP address,or IP subnet mask, select
4) Ethernet Configuration from the Configuration menu.
The configuration menus
You can use FTP or TFTP to send a
Operating Manual U42093-J-Z716-1-74
Configuring the PSFR-CP41 SNMP Configuration
SNMP Configuration
The SNMP Configuration menu allows for various SNMP options to be
configured. This includes Trap manager IP address, community names, and
Trap priority.
SNMP Configuration
Version: X.X XXXX
Current SNMP Configuration:
Community Name for GET: pub
Community Name for SET: priv
Manager IP Address for Traps: 1.1.1.1
Traps are enabled for events of any priority
1) Change Community Name for GET
2) Change Community Name for SET
3) Toggle Trap
4) Change Manager IP Address for Traps
5) Decrease Trap Priority
6) Increase Trap Priority
X) Return to previous menu
Toggle Trap
SNMPTrap EnableallowsTrap reporting to be turned on and off. If SNMP Traps
are disabled, no Trap events are sent.
SNMP Configuration
Version: X.X XXXX
Current SNMP Configuration:
Community Name for GET: pub
Community Name for SET: priv
Traps are disabled
1) Change Community Name for GET
2) Change Community Name for SET
3) Toggle Trap
X) Return to previous menu
Press 3) to enable Trap events.
U42093-J-Z716-1-74 Operating Manual
SNMP Configuration with Traps Enabled Configuring the PSFR-CP41
SNMP Configuration with Traps Enabled
GET and SET Community Names
The SNMP GET community nameis checkedforeach G ET request receivedby
the PSFR-CP41. The community name in the SNMP packet must match the
communityname configured here forthe SNMP GET request to besuccessfully
completed. Configure your SNMP manager to have the same GET and SET
community names as the PSFR-CP41.
IP Address for Traps
The Trap Manager IP address is the address used for sending Traps. Typically,
this is the IP address of the machine using the Network Management Program
and/or a MIB browser.
Trap Priority
TheSNMP TrapPrioritydetermines which trapswill be sentto the specifiedTrap
IP Address. Events having a priority equal to or higher than the configured
priority will be sent first.
Operating Manual U42093-J-Z716-1-74
Troubleshooting
Various problems can arise when configuring and using the PSFR-CP41. This
section is provided to help guide the user through some of the basic methods of
identifying faults in the setup and configuration of the unit.
Most problems are found in the initial installation. In general, it is wise to check
all connections and review the configuration before proceeding with further
troubleanalysis.Simplify the installationif possible, reducing it to themost basic
configuration then adding elements one at a time and verifying the operation at
each step.
Indicators
The LED indicators on the PSFR-CP41 are useful for diagnosing various
problems.
The
Power indicator
powerindicationsuggeststhe unitbeing turnedoff,a problem with thepower
supplied to the unit, or an internal problem with the unit.
The
Fault indicator
Faults can occur as a result of Power On Self Test (POST) failure or operational failures. It is normal for this indicator to flash on when the unit is
powered up or reset. If the fault indicator stays lit, contact Siemens support.
turns on when power i s applied to the router. Lack of
is lit when the PSFR-CP41 detects a fault condition.
The
SCSI indicator
shows SCSI activity when lit. This should only occur
briefly during powerup or configuration, and relatively often when the unit is
transferring data. If the SCSI indicator stays continually lit without corresponding target device activity, it may indicate a problem with the SCSI bus
configuration. Verify the SCSI bus configuration.
The
Fibre Channel indicator
shows Fibre Channel activity when lit. If this
indicator fails to light at all, or stays continually lit without corresponding
SCSI bus activity, it may indicate a problem with the Fibre Channel link.
Verify the Fibre Channel Configuration.
The
Ethernet indicator
signifies Ethernet activity when lit. If the light fails to
flicker, or if it stays continually lit, it may indicate a problem with the network
connection. Verifythe network connection. The port must be connected to a
10BaseT Ethernet network to function properly.
U42093-J-Z716-1-74 Operating Manual
Basic Verification Troubleshooting
Basic Verification
Verify SCSI Bus Configuration
Problemswith SCSIbusconfigurationare common. Basicoperationof the SCSI
bus can be checked by using the configuration menu to view attached SCSI
devices. See Chapter “Configuring the PSFR-CP41” for more information.
Other conditions to look for include:
Termination – Problems with termination can cause intermittent or hard
failure.The SCSI bus mustbe terminated on both ends, and only both ends.
Terminationissues whenboth narrowand widedevices are on the same bus
are common.
Bus Type – Single-Ended devicescannot be mixed with Differential devices
on the same bus. Similarly, Single-Ended terminators cannot be used on
Differential buses, and Differential terminators cannot be used on a SingleEnded bus.
Device ID – Each device on a SCSI bus must have a unique ID.Also check
the configured ID’sforthe PSFR-CP41to verify these are not in use by other
devices on the same SCSI bus.
Cabling – Check SCSI cables to verify they are functional. SCSI rules for
total length, distance between devices,and stub length must be adhered to.
Connections should also be checked and reseated if necessary.
SCSI Devices– Verify SCSI devicescan be seen in the configuration menu
of the PSFR-CP41. Select ”Perform Configuration” from the first menu.
Then select ”Fibre Channel to SCSI Mapping Configuration.” SCSI devices
should be listed. If the PSFR-CP41 can not see the devices, verify SCSI
configuration and cabling.
Operating Manual U42093-J-Z716-1-74
Troubleshooting Basic Verification
Verify Fibre Channel Connection
If SCSI devicesare recognized on the SCSI bus, but do not appear to the Fibre
Channelhost, it maybethat the FibreChannel linkisnot established.Mosthubs
and switches havelink indicators,showing link status. When the PSFR-CP41 is
connectedand poweredon, this link indicator shouldshow a good link. If it does
not, check the cabling or connections. As a means of verifying link integrity
when connected to a functional host,disconnecting thenreconnecting the Fibre
Channelcable should cause momentaryactivity of this indicator as the link reinitializes. Also verify that the media type of the PSFR-CP41 and attached hub,
HBA, or switch are of corresponding types. When using optical media, verify
that the attached device is using non-OFC type optical devices.
Verify SCSI Devices in NT
If r unning FC-to-SCSI mapping mode, open the NT Control Panel,select ”SCSI
Adapters,” and double click on the FC HBA. The SCSI devices should be listed.
If no devices are listed, verify the PSFR-CP41 configuration, FC HBA configuration, and cabling.
If devices are listed, verify FC HBA mapping mode or ALPA addresses on the
PSFR-CP41.
Verify Configuration
A number of configuration changes may result in an invalidconfiguration. If you
are in doubt about the configuration, restore the PSFR-CP41 to the factory
defaultconfigurationand proceed toconfigure the unita step at a time,verifying
the functionality of the configuration as changes are made.
U42093-J-Z716-1-74 Operating Manual
Basic Verification Troubleshooting
Verify Addressing
Ifworking inFC-to-SCSI targetmode andusing Indexedor SCC Addressing, try
swapping to Auto Addressing to see if this solves the problem.
Verify Devices
SCSI target devices can be connected to a host SCSI bus to verify they are
functional.
Verify Host Configuration
In some cases, it may be that the host bus adapter or drivermay not be working
properly. Check the configuration of these elements. It may be useful to check
the release notes for the driver provided to see if there are any specific issues
or required configuration. It may also be useful to ensure that you are using a
current version of the host bus adapter driver.
Verify HBA Device Driver Information
Check the HBA device driver Readme file for configuration specifics. An HBA
mayrequire a differentconfiguration, depending on whether it is connected to a
loop or a switch.
RS-232 Port Problems
If you experience trouble communicating with the RS-232 por t, verify the host
terminal emulation configuration.The PSFR-CP41 requires the baud rate to be
set correctly,8 data bits, 1 stop bit, and no parity. Flow control should be
disabled, and may cause problems if set to ‘hardware’ or XON/XOFF. Some
hosts maynot support baud rates higher than 19200, so a lower baud rate may
be required. If problems persist, you may want to check the cabling or try a
differenthost. If a valid Ethernet IP address is configured, RS-232 configuration
settings can also be set via SNMP and telnet.
Operating Manual U42093-J-Z716-1-74
Troubleshooting Basic Verification
Running Diagnostics
Forfurther diagnostic testing, a Diagnostic Cable Kit can be purchased. Instructions for running a diagnostics wrap test are included with the kit. Contact your
service representative for information on purchasing and using the Diagnostic
Cable Kit.
Contact Siemens support
If you are unable to resolve your issue, contact your ser vice representative.
Siemens support may ask that you provide trace data or other configuration
information. Trace data is obtained by setting the appropriate trace levelsin the
configuration menu, and running the failing situation. The terminal emulator is
set to capture information to a file, and the appropriate trace data is dumped to
the serial port. This results in a standard text file that can be mailed or faxed to
Siemens support personnel.
U42093-J-Z716-1-74 Operating Manual
Appendix A
RJ-11 Serial and RJ-45 Ethernet Pin Assignments
Pin No. Function
Pin 1 No Connect
Pin 2 Ground
Pin 3 Transmit Data
Pin 4 Receive Data
Pin 5 RTS
Pin 6 CTS
RJ-11 pin assignments
Pin No. Function
Pin 1 Transmit
Pin 2 Transmit
Pin 3 Receive
Pin 4
Pin 5
Pin 6 Receive
Pin 7
Pin 8
Pin 9
RJ- 45 pin assignments
U42093-J-Z716-1-74 Operating Manual
Appendix B
Addressing, Structures and Operation
Fibre Channel and SCSI s ystems employ different methods of addressing
devices.The inclusion of a bridgeor router requires that a method of translating
device IDs be implemented so that each SCSI device is mapped to the appropriate Fibre Channel LUN. The SCSI busestablishes bus connections between
devices.Targets on the SCSI bus may internally address logical units. The
addressing of a specific SCSI device is represented by the BUS:TARGET:LUN
triplet.
When a Fibre Channel initiator initializeson an arbitrated loop, the first order of
business is to determine what devices exist on the loop. Device discovery is
performed,and an FCP target devicelist is built. Each deviceis queried for FCP
logical units. The logical units are the actual devices that the operating system
will address. When an initiator addresses a logical unit, the LUN field used is
consistent in form with the SCC defined fields. All current Fibre Channel host
bus adapter dr ivers are consistent with these methods. The addressing used is
the SCC Logical Unit Addressing and Peripheral Device Addressing methods,
shown in Table “SCC Addressing structure” and “PeripheralDevice Addressing
LUN structure”. First level addressing is supported, so only the first 2 bytes of
the 8 byte FCP LUN are used.
Bit
Byte
n Address Method Address Method Specific
n+1 Address Method Specific
SCC Addressing structure
Bit
Byte
n00 Bus
n+1 Target/LUN
Peripheral Device Addressing LUN structure
U42093-J-Z716-1-74 Operating Manual
76543210
76543210
Addressing, Structures and Operation AppendixB
Bit
Byte
n 1 0 Target
n+1 Bus LUN
SCC Logical Unit Addressing LUN structure
Codes Description
00 Peripheral Device Addressing Method
01 Volume Set Addressing Method
10 Logical Unit Addressing Method
11 Reserved
Address Method definitions
76543210
Operating Manual U42093-J-Z716-1-74
Appendix B Addressing, Structures and Operation
0:0x01 21:0x2E 42:0x52 63:0x74 84:0xA6 105:0xC9
1:0x02 22:0x31 43:0x53 64:0x75 85:0xA7 106:0xCA
2:0x04 23:0x32 44:0x54 65:0x76 86:0xA9 107:0xCB
3:0x08 24:0x33 45:0x55 66:0x79 87:0xAA 108:0xCC
4:0x0F 25:0x34 46:0x56 67:0x7A 88:0xAB 109:0xCD
5:0x10 26:0x35 47:0x59 68:0x7C 89:0xAC 110:0xCE
6:0x17 27:0x36 48:0x5A 69:0x80 90:0xAD 111:0xD1
7:0x18 28:0x39 49:0x5C 70:0x81 91:0xAE 112:0xD2
8:0x1B 29:0x3A 50:0x63 71:0x82 92:0xB1 113:0xD3
9:0x1D 30:0x3C 51:0x65 72:0x84 93:0xB2 114:0xD4
10:0x1E 31:0x43 52:0x66 73:0x88 94:0xB3 115:0xD5
11:0x1F 32:0x45 53:0x67 74:0x8F 95:0xB4 116:0xD6
12:0x23 33:0x46 54:0x69 75:0x90 96:0xB5 117:0xD9
13:0x25 34:0x47 55:0x6A 76:0x97 97:0xB6 118:0xDA
14:0x26 35:0x49 56:0x6B 77:0x98 98:0xB9 119:0xDC
15:0x27 36:0x4A 57:0x6C 78:0x9B 99:0xBA 120:0xE0
16:0x29 37:0x4B 58:0x6D 79:0x9D 100:0xBC 121:0xE1
17:0x2A 38:0x4C 59:0x6E 80:0x9E 101:0xC3 122:0xE2
18:0x2B 39:0x4D 60:0x71 81:0x9F 102:0xC5 123:0xE4
19:0x2C 40:0x4E 61:0x72 82:0xA3 103:0xC6 124:0xE8
20:0x2D 41:0x51 62:0x73 83:0xA5 104:0xC7 125:0xEF
Arbitrated Loop Node number to ALPA lookup table
U42093-J-Z716-1-74 Operating Manual
SCC Addressing Option Appendix B
SCC Addressing Option
Whenthe PSFR-CP41 is configured to use SCC addressing,the unit is capable
of responding as a controller device to the FCP Initiator, or routing the FCP
request to a specified BUS:TARGET:LUN triplet. When a request using the
Peripheral Device Addressing Method is received (An FCP command with the
LUN field with bits 7 and 6 of byte 0 are set to 0), the unit routes the request to
thePSFR-CP41, which actson thecommand directly.When arequest usingthe
LogicalUnit Addressing Methodis received(bits 7 and 6 set to 10b), the request
is routed to the BUS:TARGET:LUN as specified in the defined field.
Host systems using SCC addressing will typically do initial device discovery
using the Peripheral Device Addressing method. On issuing an INQUIRY
command,the host will receive the PSFR-CP41 inquirydata (Appendix C,Table
2), indicating the device type as a controller device. The host will then know on
this basis that subsequent commands to attached devices will use the Logical
Unit Addressing method. The host can perform discovery by either walking
through the BUS:TARGET:LUN values as would a standard SCSI driver, or by
issuinga REPORTLUNS command (Appendix B). This command is sent tothe
controller(using the Peripheral DeviceAddressing Method), and returns a table
indicating attached devices. The host can then perform actions on these
devicesdirectly without having to perform discovery thr ough all possible combinations.
Operating Manual U42093-J-Z716-1-74
Appendix B Indexed Addressing Option
IndexedAddressingOption
IndexedAddressingallows forhost bus adapter drivers that only use Peripheral
Device addressing to access SCSI devices attached to the PSFR-CP41 unit.
This is done by use of a table which is indexed by sequential LUN values,
indicatingselected BUS:TARGET:LUN devices. It is notpossible in this mode to
address the PSFR-CP41 unit as a controller unit directly when using the
IndexedAddressing option. The size of the table is equal to the number of
busses times the number of targets per bus, less one initiator ID per bus, times
the number of LUNs per target. The index table can be manually edited. Configuration tools allow for the table to be filled in order of increasing bus, target, or
LUN, as may be desired for the specific requirements needed. A method is also
provided to perform device discovery, and fill the table in the order that devices
arediscoveredontheSCSIbusses.Asanexample,iftherearethreedevices
connected to the SCSI bus at BUS:TARGET:LUN 0:0:0, 0:1:0 and 0:2:0, The
Indexedtable will look like Table “Example of Fibre Channel-to-SCSI mapping
table”.
The - indicates a null entry.
i
FC_LUN BUS TGT LUN
0x00 0 0 0
0x01 0 1 0
0x02 0 2 0
0x03 - - :::::
:::::
0x0B - - 0x0C - - 0x0D - - 0x0F - - -
Example of Fibre Channel-to-SCSI mapping table
U42093-J-Z716-1-74 Operating Manual
Auto Assigned Addressing Option Appendix B
Auto Assigned Addressing Option
The Auto Assigned option is similar to the Indexed addressing, but with the
distinction that the table used is created through SCSI device discovery on
power up or reset, and not otherwise retained. As the unit performs device
discoveryonthe SCSIbus,the Indextablerelating FCP LUN values isfilled with
adjacent FCP LUNs referencing each subsequent SCSI device. The host
system will then detect every attached devicewithout voids, allowing full device
discovery to the host. This allows easy configuration in environments where
deviceordering isnot important and hotplugging ofSCSI deviceswill not occur.
Tape libraries are excellent candidates for using Auto Assigned Addressing.
Configuration allows for discovery to be performed in order of bus, target, or
LUN as desired for the specific environment.
Operating Manual U42093-J-Z716-1-74
Appendix C
Reference Standards
Fibre Channel Physical and Signaling Interface (FC-PH),
X3T9.3/Project 755D/Rev. 4.3,
Contact: Global Engineering, 1-800-854-7179
Fibre Channel Protocol for SCSI (FCP) Rev 12
Fibre Channel Private Loop Direct Attach (FC-PLDA)
Fibre Channel Arbitrated Loop (FC-AL),
4.54, Contact: Globe Engineering, 1-800-854-7179
GigaBaud Link Module (GLM) Family
FCSI-301-Revision 1.0
Common FC-PH Feature Sets Profiles
FCSI-101-Rev. 3.1
SCSI Profile,
FCSI IP Profile
Fibre Channel System Initiative, FCSI-201-Rev. 2.2
, Fibre Channel System Initiative, FCSI-202-Rev. 2.1
ANSI X3T11/Project 960D/Rev.
, Fibre Channel System Initiative,
, Fibre Channel Systems Initiative,
ANSI
U42093-J-Z716-1-74 Operating Manual
Glossary
Adapter
A printed circuit assembly that translates data between the FC host
processor’s internal bus and a different bus, such as SCSI.
Address
See SCSI Addressing.
Addressing Mode
A menu item. It is used to create a mapping table that maps devices on the
SCSI bus to Fibre Channel logical units.
AL_PA
Arbitrated Loop Physical Address.
Arbitrated Loop
See Fibre Channel - Arbitrated Loop.
Area
The second byte of the N_Port Identifier.
Auto-Assigned Mapping
A menu item. The auto-addressing option creates a mapping table using
devices discovered upon powering up or resetting the PSFR-CP41, that is
not otherwise retained by the PSFR-CP41.
Baud
The encoded bit rate per second.
Bus
A means of transferring data between modules and adapters or between an
adapter and SCSI devices. For a SCSI bus definition, see SCSI Bus.
Channel
A general term for a path on which electronic signals travel.
U42093-J-Z716-1-74 Operating Manual
Clusters
Two or more computers sharing the same resources on a communication
link.
Device
SeeFCDeviceorSCSIDevice.
Differential
An electrical signal configuration using a pair of lines for data transfer. The
advantageof differentialcomparedto single-ended configuration is arelative
high tolerance for common-mode noise and crosstalk when used with
twisted pair cables.
Domain
A FC term describing themost significantbyte in the N_Port Identifier forthe
FC device. It is not used in the FC-SCSI hardware path ID. It is required to
be the same for all S CSI targets logically connected to a FC adapter.
Exchange
A FC term for the basic mechanism used for managing an operation. An
exchange identifies information transfers consisting of one or more related
nonconcurrent sequences that may flow in the same or opposite directions,
but always in half duplex mode. An exchange is identified by an OX_IDand
an RX_ID.
Glossary
Fabric
A FC term describing a switchedtopology, which is one of the thr ee existing
FC topologies. Fabric elements interconnect various N_Ports or NL_Ports
and are responsible for frame routing.
Fast/Wide SCSI
”Fast”and ”Wide” are relative terms in comparing previousSCSI standards
and products. ”Fast,” as defined in SCSI-2, refers to a maximum
synchronous transfer rate of 10 MHz. ”Wide” refers to a data path of 16 bits.
Fault LED
During power up and self test, the PSFR-CP41 Fault LED comes on. After
selftest, ifthis LED remains on orcomes on, the PSFR-CP41 has a problem
withoneof its components.Duringnormal operation,this LED shouldbeoff.
When the PSFR-CP41 is offline, this LED blinks.
Operating Manual U42093-J-Z716-1-74
Glossary
FC
See Fibre Channel.
FC-AL
See Fibre Channel - Arbitrated Loop.
FC Adapter
A printed circuit assembly that translates data between the FC host
processor’s internal bus and the FC link.
FC Device
A device that uses Fibre Channel communications.
FC Port
An opening at the back of the PSFR-CP41 that provides a fiber optic
connection between the FC adapter and the FC host.
FC-SCSI Hardware Path ID
A FC term describing a list of values showing the physical hardware path of
the FC host to the target device.
Format:
Bus_Converter/Adapter_Address.Protocol_Type.Area.Port.Bus.Target.
LUN
Example: 8/4.8.0.0.2.4.0
Fiber
The fiber optic cable made from thin strands of glass through which data in
the form of light pulses is transmitted (LASER, LED). It is used for highspeed transmission over medium (200m) to long (10km)distances.
Fibre
A generic FC term used to cover all transmission media types specified i n
the Fibre Channel Physical Layer standard (FC-PH), such as optical fiber,
copper twisted pair, and copper coaxial cable.
U42093-J-Z716-1-74 Operating Manual
Glossary
Fibre Channel (FC)
Logically, the Fibre Channel is a bidirectional, full-duplex, point-to-point,
serial data channel structured for high performance data communication.
Physically, the Fibre Channel is an interconnection of multiple communication ports, called N_Ports, interconnected by a switching network, called
a fabric, a point-to-point link, or an arbitrated loop. Fibre Channel is a generalized transport mechanism that has no protocol of its own or native
input/output command set, but can transport any existing Upper Level
Protocols (ULPs) such as SCSI and IP.
Fibre Channel - Arbitrated Loop (FC-AL)
Oneof three existingFibre Channel topologies,inwhich 2to 126 devicesare
interconnected serially in a single loop circuit. The arbitrated loop topology
supports all classes of service and guarantees in order delivery of frames
when the source and destination are on the same loop.
Fibre Channel Protocol for SCSI (FCP)
FCP defines a Fibre Channel mapping layer (FC-4) that uses FC-PH
services to transmit SCSI command, data, and status information between
a SCSI initiator and a SCSI target. Using FCP enables transmission and
receiptof SCSI commands, data and status, across the Fibre Channel using
the standard Fibre Channel frame and sequence formats.
Frame
The smallest, indivisible unit of information transfer used by Fibre Channel.
Framesare used for transferring data associated with a sequence. Frame
size depends on the hardware implementation and is independent of the
ULP or the application software.
Gigabaud Interface Converter
A physical component that manages the functions of the FC-0 layer, which
is the physical characteristic of the media and interface, including drivers,
transceivers,connectors, and cables. Mounts on a FC adapter card and
connects the PSFR-CP41 to a FC host. Also referred to as a Physical Link
Module (PLM).
Hardware Path
See FC-SCSI Hardware Path ID.
Host Bus Adapter
See FC Adapter.
Operating Manual U42093-J-Z716-1-74
Glossary
Indexed Addressing
It allows for gener ic Fibre Channel host bus adapters to access SCSI
devices attached to the PSFR-CP41 using a table which is i ndexed by
sequential LUN values.
Initiator
A SCSI device (usually a host system) that requests an operation to be
performedbyanother SCSI deviceknown as thetarget (forexample,aSCSI
disk or tape drive).
Link
For Fibre Channel, it is a connection between two nodes, each having at
least one N_Port, interconnected by a pair of optical or copper links, one
inbound and one outbound.
Longwave
Lasers or LEDs that emit light with wave lengths around 1300 nm. Long
wave lasers are used for long Fibre Channel links, from ~700 to 2000 m.
They are typically used with single-mode fiber of a 9-micron core size.
Loop Address
A FC term indicating the unique ID of a node in FibreChannel loop topology,
sometimes referred to as a Loop ID. Also a status type in the FC Status
Menu, showing the FC Loop Address of the PSFR-CP41.
Loop Port (L_Port)
A FC port that supports loops.
LUN
Logical Unit Number or Logical Unit; a subdivision of a SCSI target. For
SCSI-3, each SCSI target supports up to sixteen LUNs (LUN-0 to LUN-16).
Using LUNs, the FC host can address multiple peripheral devices that may
share a common controller.
Management Information Base (MIB)
A structured set of data variables, called objects, in which each variable
represents someresource to be managed. A related collection of resources
to be managed.
U42093-J-Z716-1-74 Operating Manual
Mapping Table
A table which is indexed by sequential LUN values, indicating selected
BUS:TARGET:LUN devices. It is used by the PSFR-CP41 to perform Fibre
Channel-to-SCSI operations by default.
MIB
See Management Information Base.
Multiplexer
Adevicethat allowstwo ormore signals to be transmittedsimultaneouslyon
a single channel.
Motherboard
The main PCA of the PSFR-CP41 that provides a physical and logical
connection between Fibre Channel and SCSI devices.
N_Port
A FC term defining a ”Node” port. A FC-defined hardware entity that
performs data communication over the FC link. It is identifiable by a unique
Worldwide Name. It can act as an originator or a responder.
N_Port Identifier
A FC term indicating a unique address identifier by which an N_Port is
uniquelyknown. It consistsof a Domain (most significant byte),an Area, and
aPort, each 1 byte long.The N_Port identifieris usedin theSource Identifier
(S_ID) and Destination Identifier (D_ID) fields of a FC frame.
Glossary
Node Name
A field value under the FC Status Menu. The unique FC identifier, a 64-bit
value, the factory assigns to the PSFR-CP41.
Offline
Takingthe PSFR-CP41 offline indicates that all SCSI and FC adapters in the
PSFR-CP41 are offline.
Takinga SCSI adapter offline means ending inputs/outputs and suspending
all transactions going from the PSFR-CP41 to the specified SCSI devices.
The SCSI adapter is no longer active or availablefor access.
Takinga FCadapter offlinemeans endinginputs/outputs and suspending all
transactions going from the PSFR-CP41 to the specified FC device.
Operating Manual U42093-J-Z716-1-74
Glossary
Online
For the PSFR-CP41, online indicates that at least one adapter in the PSFRCP41 is active and available for access.
ForaSCSI adapter,online indicates theSCSI adapteris active and available
for access and input/output processing.
For a FC adapter, online indicates the FC adapter is active and availablefor
access and input/output processing.
Originator
The Fibre Channel N_Port responsible for star ting an exchange. A FC originator is comparable to a SCSI initiator.
Point-to-Point
One of three existing FC topologies, in which two ports are directly
connected by a link with no fabric, loop, or switching elements present. The
PSFR-CP41 supports all topologies.
Port Name
A field value under the FC Status Menu; the FC port identifier; a 64-bit value
the factory assigns to each FC adapter.
POST
See Power On Self Test.
Power On Self Test (POST)
A group of tests run when the PSFR-CP41 is powered on.
Processor
Contains the arithmetic and logic, control, and internal memory units that
control the PSFR-CP41.
Reset SCSI
For a specific SCSI bus, the host clears all inputs and outputs and then
resets the bus and all the devices connected to it.
Responder
The logical function in an N_Port responsible for supporting the exchange
initiated by the originator in another N_Port. A FC responder is comparable
to a SCSI target. The PSFR-CP41 is often the responder.
U42093-J-Z716-1-74 Operating Manual
SCC Addressing
SCSI-3 Controller Commands (SCC) addressing is used to address SCSI
devices attached to the PSFR-CP41 using the SCC logical unit addressing
method. In SCC addressing mode, the PSFR-CP41 will respond to FCP
commands as in a SCC controller device.
SCSI
Small Computer System Interface. An industry standard for connecting
peripheral devices and their controllers to an initiator.
SCSI Adapter
A 16-bit fast/wide differential or 8-bit narrow single-ended physical
connection between the PSFR-CP41 and the SCSI devices. Each SCSI
adapter supports up to sixteen (for fast/wide) or eight (for narrow) SCSI
devices, including itself.
SCSI Addressing
A fast/wide SCSI adapter supports up to 16 devices, including itself. Each
device has its own unique SCSI address. The SCSI address of a device
dictatesthedevice’spriority whenarbitratingforthe SCSI bus.SCSI address
”7” has the highest priority. The next highest priority address is ”6” followed
by5, 4, 3, 2, 1, 0, 15, 14, 13, 12, 11, 10, 9, 8,with ”8” being the lowestpriority
address.
The fast/wide SCSI adapter is factory set to address 7. A narrow SCSI
adapter supports up to eight devices, including itself. SCSI address ”7” has
the highest pri ority followed by 6, 5, 4, 3, 2, 1, and 0.
Glossary
SCSI Bus
The means of transferring SCSI data between SCSI devices. It is an 8-bit or
16-bit bus that supports up to eight or sixteen devices (including itself), in
any mix of initiators and targets, with the limitation that at least one initiator
and one target must be present.
SCSI Device
Asingle unit on the SCSIbus, identifiableby a unique SCSI address.A SCSI
device can act as an initiator or target. For SCSI-3, each SCSI device
supports up to sixteen LUNs.
SCSI Port
An opening at the back of the PSFR-CP41 providing connection between
the SCSI adapter and the SCSI bus.
Operating Manual U42093-J-Z716-1-74
Glossary
SCSI Status
A menu used to show the number, and status, of SCSI devices on the bus.
Shortwave
Lasers or LEDs that emit light with wavelengths around 780 nm or 850 nm.
Short wave lasers are used for FC links up to ~700 m. They are typically
used with multimode fibre. The preferred fibre core size is 50 micron as this
fibre has large bandwidth so that the distance is limited by the fibre attenuation.A 62.5 microncore sizeis alsosupportedforcompatibilitywith existing
FDDI installations. Fibre of this type has smaller bandwidth and, in this case,
the distance is limited by the fibre bandwidth.
SNMP
Simple Network Management Protocol.
Speed
A status type in the FC Status Menu showing the speed (1063 Mbps) of the
FC adapter.
Target
A SCSI device (usually the peripheral) that responds to an operation
requestedbya SCSI initiator(usuallythe host system).SCSI peripherals are
targets, but for some commands (for example, a COPY command), the
peripheral may need to act temporar ily as an initiator.
Terminator Block/Termination
An electrical connection at each end of the SCSI bus composed of a set of
resistors (or possibly other components). Its function is to provide a pull-up
for open collector drivers on the bus, and also impedance matching to
prevent signal reflections at the ends of the cable.
The SCSI bus requires termination at both ends of the bus. One end of the
SCSIbusis terminated by the SCSIadapter’sinternal termination.The other
end should have a terminator placed on the 68-pin high density SCSI
connector on the last SCSI per ipheral. If this device is not terminated, data
errors may occur.
U42093-J-Z716-1-74 Operating Manual
Glossary
Topology
The physical or logical layout of nodes on a network. FC topologies include
point-to-point, FC-AL, and Fabric. The PSFR-CP41 supports all topologies.
A status type in the FC Status Menu showing the type of FC topology being
used.
Trap
In the context of SNMP, an unsolicited message sent by an agent to a
management station. The purpose is to notify the management station of
some unusual event.
View Node Name
A status type in the FC Status Menu showing the identification of the node.
View Port Name
A status type in the FC Status Menu showing the identification of the port.
WorldWideName(WWN)
A Name_Identifier which is worldwide unique, and represented by a 64-bit
unsigned binary value.
Operating Manual U42093-J-Z716-1-74
Environmental protection
Environmentally friendly product design and development
This product has been designed in accordance with the Siemens standard
“environmentally friendly product design and development”.
This means that the designers have taken into account decisive criteriasuch as
durability, selection of materials and coding, emissions, packaging, the ease
with which the product can be dismantled and the extent to which it can be
recycled.
This saves resources and thus reduces the harm done to the environment.
Note on saving energy
Devicesthat do not haveto be switchedon permanentlyshould not be switched
on until they are used and should be switched off during long breaks and on
completion of work.
Note on dealing with consumables
Please dispose of printer consumables and batteries in accordance with local
government regulations.
Note on labeling plastic housing parts
Please avoid sticking your own labels on plastic housing parts wherever
possible, since this makes it difficult to recycle them.
Take-back, recycling and disposal
Fordetails on take-back and reuse of devices and consumables within Europe,
contact your Siemens branch office/subsidiary or our recycling center in
Paderborn:
Tel. +49 5251 8180-10
Fax. +49 5251 8180-15
U42093-J-Z716-1-74 Operating Manual
Environmental protection
Further information on environmental protection
The Siemens AGrepresentative for environmental protection will be pleased to
answer any further questions you may have concerning environmental
protection.
Siemens AG
Environmental Protection
Werner von Siemens Straße 6
86159 Augsburg
Tel. +49 821 599-2999
Fax. +49 821 599-3440
Operating Manual U42093-J-Z716-1-74
Siemens AG
Information and Communication Products
ComputerSystems
User Documentation UNIX
33094Paderborn
Germany
Fax: (++ 49) 52 51 8-1 52 48
e-mail: DOCetc@pdb.siemens.de
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Installing, Starting Up and Maintaining
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