Brocade Communications Systems SilkWorm 2100 Service manual

53-0001507-01
SilkWorm®2100
Reference

ii SilkWorm 2100 Reference
Copyright
© 1999, Brocade Communications Systems, Incorporated.
ALL RIGHTS RESERVED. Publication 53-0001507-01
BROCADE, SilkWorm, SilkWorm Express, Fabric OS, QuickLoop, and the BROCADE logo are
trademarks or registered trademarks of Brocade Communications Systems, Inc., in the United States
and/or in other countries.
All other brands, products, or service names are or may be trademarks or service marks of, and are
used to identify, products or services of their respective owners.
Notice: This document is for informational purposes only and does not set forth any warranty,
express or implied, concerning any equipment, equipment feature, or service offered. BROCADE
reserves the right to make changes to this document at any time, without notice, and assumes no
responsibility for its use.
Export of technical data contained in this document may require an export license from the United
States Government.
Brocade Communications Systems, Incorporated

SilkWorm 2100 Reference iii
Notices
FCC Warning (USA only)
This equipment has been tested and complies with the limits for a Class A computing device
pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection
against harmful interference when 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.
Operating this equipment in a residential area is likely to cause harmful interference in which case
the user is responsible for repairs.
VCCI 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.
(Japanese Text)
CE Statement
The standards compliance label on the SilkWorm 2100 Fibre Channel Switch contains the CE mark
which indicates that this system conforms to the provisions of the following European Council
Directives, laws, and standards:
• Electro Magnetic Compatibility (EMC) Directive 89/336/EEC and the Complementary
Directives 92/31/EEC and 93/68/EEC:
• EN550022, Class A; Emissions Industrial Environment
• EN 50082-2 Immunity Industrial Environment
• EN61000-4-2 Electro Static Discharge
• EN61000-4-3 Radiated RF
• EN61000-4-4 Electrical Fast Transients
• EN61000-4-5 Surge
• EN61000-4-6 Conducted RF
• EN61000-4-11 Line Interruption Low Voltage Directive (LVD) 73/23/EEC and the Com-
plementary Directive 93/68/EEC:
• EN 60950:92 A1:93 & A2:93 & A3:95 & A4:96 & A11:97
• EN60825-1:199/A11, -2
Canadian Requirements
This class A digital apparatus meets all requirements of the Canadian Interference-Causing
Equipment Regulations.
Cet appareil numerique de la classe A respecte toutee les exigences du Regiements sur le material
brouilleur du Canada.
Laser Compliance
This equipment contains class 1 laser products, and it complies with FDA radiation Performance
Standards, 21 CFR Subchapter J.

iv SilkWorm 2100 Reference
Notices

SilkWorm 2100 Reference v
Contents
Preface Related Publications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Getting Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii
Getting Software Updates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii
Chapter 1 Overview
The SilkWorm 2100 Arbitrated Loop. . . . . . . . . . . . . . . . . . . . . . . . . 1-1
The SilkWorm 2100 Advantage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Reliability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Manageability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Flexibility . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
SilkWorm 2100 System Components. . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Main Board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Fabric OS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
GBIC Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
The SilkWorm 2100 Switch and Fabric OS . . . . . . . . . . . . . . . . . . . . 1-6
Chapter 2 Setup and Installation
Choose an Appropriate Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Provide Cooling Air and Power Sources . . . . . . . . . . . . . . . . . . 2-1
Determine the Installation Configuration . . . . . . . . . . . . . . . . . . . . . . 2-2
Set Up Fibre Channel, Serial Port, and Ethernet Connections . . . . . . 2-4
Cabling and Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Ethernet Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Initialize the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Chapter 3 Diagnostics
Diagnostic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Power On Self Tests (POSTs). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

vi SilkWorm 2100 Reference
Appendix A Specifications
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Safety. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Optical Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Copper GBIC Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Environmental. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4
Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4
Index

SilkWorm 2100 Reference vii
Preface
This manual describes installation, setup, configuration, diagnostics, and maintenance for
the SilkWorm 2100 switch. It is intended for customers qualifying the SilkWorm 2100
switch as well as for field technicians responsible for switch maintenance. It is organized
as follows:
Related Publications
Other publications that provide related information are listed below.
•Fabric OSTM, P/N 53-0001535-01
The Fibre Channel Association web site contains additional information on Fibre Channel
and Fibre Channel standards. This web site is located at:
• http://www.fibrechannel.com
Preface Provides information on related
publications, available training, getting
help and getting software updates.
Chapter 1 - Overview Provides an overview of the Silkworm
2100 with a brief description of
each component
Chapter 2 - Setup and Installation Describes setup and installation including
physical location, cooling and power
requirements, connections, mounting
options, and initialization
Chapter 3 - Diagnostics Describes diagnostic tests, including Power
On Self Tests (POSTs), and LED status
indicators
Appendix A - Specifications Lists product specifications as well as
regulatory compliances

viii SilkWorm 2100 Reference
Preface
Getting Help
Your switch supplier is also your source for help regarding problems with your switch.
Contact the supplier of your switch and be prepared to provide the following information
to the support personnel:
Switch serial number
Output from supportShow command
Detailed problem description
Topology configuration
Troubleshooting steps already performed
Getting Software Updates
Your switch supplier is also your source for obtaining software updates and maintenance
releases. Contact your supplier to obtain information on available maintenance releases,
update releases or new feature availability.
New switch firmware can be installed from NT/Windows 95 hosts or from Unix hosts.
Utility programs that facilitate the loading of firmware from NT/Windows 95 hosts is
available from the following url:
http://www.brocade.com/BrocMarket.nsf/Support/Mibs&Rsh
The above url can also be used for obtaining MIB files for switch management via SNMP.

SilkWorm 2100 Reference 1-1
Chapter
1
Overview
The SilkWorm 2100 switch is an 8-port, gigabit Fibre Channel switch in the SilkWorm
2000 switch family. As a low-cost, high-performance alternative to a hub-based solution,
the SilkWorm 2100 is ideal for storage or server area network (SAN) environments with
hosts and devices supporting arbitrated loops (FC-AL).
The SilkWorm 2100 Arbitrated Loop
With FC-AL, multiple devices can share the gigabit bandwidth. However, unlike a hub-
based solution that physically connects ports to form a shared loop, the SilkWorm 2100
logically connects ports, separately managing and controlling each part of the loop or
looplet. This logical connection offers superior performance and reliability over hub-
based approaches.
Each of the eight ports of the SilkWorm 2100 switch forms a looplet; the looplets are
logically connected to form an FC-AL. When a loop is formed, a Loop Initialization
Protocol (LIP) initializes all the devices on each looplet. When the LIP sequence
completes, a virtual arbitrated loop is formed from the looplets that successfully complete
initialization; looplets that failed are not included in the full loop and, therefore, because
the looplets are connected logically, a failing device does not disable the entire loop.
In a traditional arbitrated loop environment, once the FC-AL is formed, a device arbitrates
for the loop to connect to a target device. When arbitration is granted, the device sends
data frames along the loop to the target device; only when the data frame transfer is
complete are other devices on the loop allowed to arbitrate for the loop.
In the SilkWorm 2100 environment, data frames are buffered within the switch if the
destination device is busy and data frames from multiple sources can be buffered and
delivered during a single arbitration. This increases efficiency and improves the overall
throughput of the SAN.

1-2 SilkWorm 2100 Reference
Overview
1
The SilkWorm 2100 Advantage
The SilkWorm 2100 switch offers advantages in the following areas:
• Performance
• Reliability
• Manageability
• Flexibility
Performance
The SilkWorm 2100 switch offers enhanced performance:
Data Transfer A device arbitrates only among the devices in its looplet; frames are
transferred to the switch for forwarding to a destination device on
another looplet.
The non-blocking architecture of the SilkWorm 2100 switch
guarantees full-speed data delivery in all traffic conditions.
Cut-through routing ensures a maximum latency of 2 microseconds
from switch port to switch port, allowing parallel data transfers of
up to eight (one per loop) simultaneous transactions at a time.
Whereas traditional hub-based arbitrated loops are limited to a total
shared bandwidth of 100 MB/sec, the SilkWorm 2100 switch is
capable of transferring data at eight times (800 MB/sec) that rate.
Buffering Unlike a traditional loop environment where a device is blocked
from transferring data when another device on the loop has control,
the SilkWorm 2100 switch can buffer data within the switch
allowing a device to transfer multiple frames. This allows for
overlapping transfers and improves the overall throughput of
the SAN.
Reliability
The SilkWorm 2100 switch provides enhanced reliability:
Port Isolation The SilkWorm 2100 switch monitors each looplet to ensure proper
device operation. If errors are detected the looplet is not allowed to
initialize and the port is taken out of service. An alert is generated
and the port is monitored until the error condition is cleared. This
enables the loop to operate while the device is isolated and repaired,
thereby preventing a failing device from disabling the entire loop.
Status Reporting The SilkWorm 2100 switch provides extensive statistics, including
a full set of performance and error counters, to aid in diagnosis and
isolation of malfunctioning ports. These statistics are retrieved via
several interfaces such as SNMP, telnet, and an optional Web-based
management interface feature, WEB TOOLS.
Diagnostics Power On Self Tests (POSTs) and online diagnostics monitor
individual ports while the switch is running. Offline diagnostics
isolate problems enabling faster restoration of service.
Hardware Features Redundant fans and a hot-pluggable redundant power supply
option eliminate service down time related to failing power
supplies or fans.

SilkWorm 2100 Reference 1-3
Overview 1
Manageability
The SilkWorm 2100 switch provides enhanced manageability:
Telnet The SilkWorm 2100 switch is managed by telnet command or
through an optional interface, WEB TOOLS. Most options are
automatically configured requiring only an IP address.
SNMP The SilkWorm 2100 switch includes SNMP-based monitoring and
management facilities for integration with enterprise management
environments. Access to switch information is standardized
through support for industry-standard MIBs.
If a problem is detected, an alarm message is sent to a network
management system that recognizes SNMP data; this early
notification of a potential problem limits network downtime.
Error logs record specific trouble areas or devices, facilitating
fault isolation.
Flexibility
The SilkWorm 2100 switch provides enhanced flexibility:
Investment The SilkWorm 2100 switch can be upgraded to a full Fabric
Protection SAN environment by entering a software feature license key.
This ensures investment protection by allowing migration to a fully
featured SAN using existing hardware resources.
Scalability An upgraded SilkWorm 2100 switch provides the same features as
a SilkWorm 2400 switch with QuickLoop. With a Fabric-upgraded
SilkWorm 2100 switch you can:
Enable individual Fabric ports while retaining arbitrated loop
function for legacy environments
Combine two switches to enlarge an arbitrated loop
Provide full access to arbitrated loops from Fabric ports using
Fabric OS translative mode

1-4 SilkWorm 2100 Reference
Overview
1
SilkWorm 2100 System Components
The Silkworm 2100 switch is comprised of several components:
• Main Board
• Fabric OSTM
• Gigabit Interface Converter (GBIC) Modules
Main Board
The main board is enclosed in an air-cooled chassis that includes one or two power
supplies, a fan tray, an RJ-45 Ethernet connection for switch set up and management, and
a serial port for recovering factory settings and initial configuration of the IP address. This
unit can be mounted in a standard rack or used standalone.
WARNING The SilkWorm 2100 can be configured with two power supplies. To
remove all power from the system, disconnect both power cords.
Fabric OS
Fabric OS provides commands and libraries to manage real time tasks; it is individually
tuned for each installation.
GBIC Modules
The Silkworm 2100 switch accommodates up to eight GBIC modules. If less than
eight GBIC modules are used, the unused port positions are protected by a metal,
spring-loaded door.
The main board module is structured to accommodate a universal port. The universal port
(U-port) supports attachment to the NL_port devices associated with an arbitrated loop.
Attachment to NL_port devices is via GBIC. The front panel of the SilkWorm 2100 switch
includes indicator lights that display port status. See Status Indicators on page 3-3.
GBIC modules are available in ShortWave Length (SWL) and LongWave Length (LWL)
fiber optics, and Copper (Cu).
SWL Fiber Optic GBIC Module
The SWL fiber optic GBIC module, with SC connector color-coded black, is based on
short wavelength lasers supporting 1.0625 Gbps link speeds. This GBIC module supports
50-micron multi-mode fiber optic cables, with cables up to 500 meters in length.The
GBIC module is shipped with a protective plug in place; it should remain in place if no
fiber optic cable is connected to the port. The SWL GBIC module uses a Class 1 laser that
complies with the 21 CFR, subpart (J) as of the date of manufacture. An SWL fiber optic
GBIC module is shown Figure 1-1.
.
Figure 1-1 Short wavelength Laser (SWL) fiber optic GBIC module

SilkWorm 2100 Reference 1-5
Overview 1
LWL Fiber Optic GBIC Module
The LWL fiber optic GBIC module, with SC connector color-coded blue, is based on long
wavelength 1300nm lasers supporting 1.0625 Gbps link speeds. This GBIC module
supports 9-micron single-mode fiber. Cables up to 10 kilometers in length with a
maximum of five splices can be used. The GBIC module is shipped with a protective plug
in place; it should remain in place if no fiber optic cable is connected to the port. An LWL
fiber optic GBIC module is shown in Figure 1-2.
Figure 1-2 Long Wavelength Laser (LWL) fiber optic GBIC module
Passive Copper GBIC Module
The Copper (CU) GBIC module is based on High-Speed Serial Data Connection
(HSSDC) interface standards. The copper GBIC module includes a female HSSDC
connector. Standard cables with HSSDC-to-DB9 male connectors are also compatible.
Copper cables up to 13 meters have currently been qualified, thereby supporting ANSI
X3.230 FC-PH intra-cabinet requirements. A passive copper GBIC module is shown in
Figure 1-3.
Figure 1-3 Copper GBIC module

1-6 SilkWorm 2100 Reference
Overview
1
The SilkWorm 2100 Switch and Fabric OS
The SilkWorm 2100 switch supports fibre channel devices; it provides the functionality
of a hub with the power and management capabilities of a switch. All SilkWorm 2100
switch ports are FL_ports with fibre channel devices attached.
The operation of the Silkworm 2100 switch is managed by Fabric OS. Fabric OS provides
a standard set of commands for customizing the switch to a specific configuration, for
controlling the switch functions, and for monitoring the switch during operation. See
Fabric OS, Version 2.0 for detailed information on Fabric OS.
All commands described in Fabric OS, Version 2.0 execute on the SilkWorm 2100 switch;
however, because Fabric OS, Version 2.0 describes the operation of Fabric OS in all
switch environments in the SilkWorm 2000 family, below are specific limitations when
Fabric OS is implemented in the non-fabric enabled environment of the SilkWorm
2100 switch.
licenseShow command executed on the Silkworm 2100 switch returns none if no
optional software features have been added; if upgraded to fabric support, any features
installed are displayed. (If upgraded to fabric support, all information in Fabric OS,
Version 2.0 applies.)
routeHelp commands can be executed on the SilkWorm 2100; however, they do not
return relevant data since the 2100 switch does not support Inter Switch Links (ISLs) and,
consequently, there is no relevant information regarding adjacent switches or routing
through the fabric.
fabricShow command executed on the SilkWorm 2100 indicates only one switch - the
2100 switch to which the telnet session is connected.
nsAllShow command returns [#} Nx_Ports in the Fabric. . .; however, the
ports listed are on the local 2100 hub-switch and are not part of a fabric.

SilkWorm 2100 Reference 2-1
Chapter
2
Setup and Installation
The following items are included with the SilkWorm 2100 switch:
• SilkWorm 2100 switch
• GBIC modules requested
• Appropriate mounting kit, if ordered
• Accessory kit containing
Power cord, if ordered
Manuals, if ordered
Software feature guides for features ordered
Rubber mounting feet
Software license
Warranty card
To set up and install the SilkWorm 2100 switch, consider the following:
• Choose an appropriate location
• Provide cooling air and power sources
• Determine the installation configuration
• Set up fibre channel, serial port, and ethernet connections
• Initialize the switch
Each of these areas is covered in detail in the following sections.
Choose an Appropriate Location
Install the SilkWorm 2100 switch in a secure or limited access area so that access to cable
and power connections is controlled. For easy access, all network cable connections and
power connections are located on the front panel of the switch.
Also ensure that the front and rear air vents are not blocked, providing free access to
ambient air for efficient cooling.
Provide Cooling Air and Power Sources
Six fans mounted near the rear of the chassis draw cooling air into the rear of the chassis
and vent it through the front of the switch. Because the switch must have free access to
ambient air, do not block these front and rear air vents.
Power is connected to the switch via power connector(s) on the front panel: one
connection for the Silkworm 2101 switch and two connectors for the SilkWorm
2102 switch.

2-2 SilkWorm 2100 Reference
Setup and Installation
2
Figure 2-1 SilkWorm 2100 Switch (One Power Supply)
Power requirements for the Silkworm 2100 switch are:
• Earth grounded outlet
• 85 - 265 VAC input voltage
• Up to 110 watts total power; see Appendix A for specific information
• 47 to 63 Hz input line frequency
• Normal clean power provision
The SilkWorm 2100 switch meets IEC 801-5 surge voltage requirements; however,
there is no other surge protection built into the power supply.
Determine the Installation Configuration
The SilkWorm 2100 switch can be installed either on the desktop or in a 19-inch rack.
Desk Top Mount
The Silkworm 2100 switch comes in a desk top configuration. Adhesive rubber feet are
provided and are required for safe operation. To install the adhesive rubber feet:
1. Ensure the depressions at each corner of the chassis bottom are clean and free of dust.
2. Firmly press one rubber foot into each of the four depressions.
An optional rack mounting kit for the SilkWorm 2100 switch is available (contact your
switch supplier for information on this kit). It features a slide mount.
When mounting a switch, follow the safety guidelines below:
If mounting in a closed or multi-rack assembly, air temperature at the front of the rack
must not exceed 40°C during operation.
Airflow available to the switch must be at least 75 cfpm.
Ensure that the switch does not unbalance the rack or exceed the rack’s mechanical
limits; check both with slides fully extended and closed.
Ensure that supply circuit, line fusing, and wire size meet requirements. (Power
requirements appear on the switch nameplate.)
Power Supply

SilkWorm 2100 Reference 2-3
Setup and Installation 2
Ensure that all equipment installed in the rack has a reliable ground connection.
Place power cord to enable switch to move freely on the slides. Avoid crimping or
damaging the power cord; also avoid interfering with other equipment.
If using the standard supplied mounting kit, use the mounting hardware provided.
Using hardware that does not meet specifications can damage the SilkWorm 2100
switch.
For a slide mount, use the slide rack kit to attach the switch to a standard 19-inch rack.
To install the slide mount:
1. Disassemble the slide rails by fully extending them, pressing the release, and pulling
the slide rails apart.
2. Mount an inner slide rail to each side of the switch using the screws supplied.
Note: In order for the slides to work properly, all mounting screws must be
inserted with the screw heads inside the slides. Do not use washers.
3. Attach the outer slide rails to the rack mounting rails using the four rack mounting
brackets provided.
4. Optional: Attach the mounting ears to the switch using the screws provided. Mount-
ing ears are required only if you plan to lock the switch to the rack.
5. Slide the inner rail completely into the outer rail ensuring that they lock into place.
6. Check alignment by opening and closing the slide rails; if binding occurs, re-align the
slide rails.
7. Optional: Secure the switch by attaching the mounting ears on the switch to the rack
mounting rail using the hardware provided. Complete this step only if you want to
lock the switch to the rack.
8. Connect the switch to power.
Figure 2-2 Slide Mount
Mounting Ears
Slide Rails
Mounting Brackets

2-4 SilkWorm 2100 Reference
Setup and Installation
2
Set Up Fibre Channel, Serial Port, and Ethernet
Connections
All network cables are connected to the front panel of the SilkWorm 2100 switch. Fiber
optic cable connections use standard dual SC plug connectors; copper cables use High
speed serial Data Connection (HSSCD) connectors.
Cabling and Connectors
See Table 2-1 for recommended cabling to support the 1.0625 Gbps transfer rate of the
SilkWorm 2100 switch.
Table 2-1 SilkWorm 2100 Switch Cabling Requirements
Cable Type Cable
Specification Maximum Run Length Minimum Bend
Radius
GBIC Module
Optical
Wavelength
SWL Fibre
Optic*Duplex SC plug
connectors
Multimode fiber
50 µm core
diameter
125 µm cladding
diameter duplex
cable
500 meters/
1641 feet 7.6 cm / 3 inches 780-860 µm without open
fiber control
(non-OFC)
LWL Fiber
Optic*Duplex SC plug
connectors
Single mode fiber
9 µm core
diameter
125 µm cladding
diameter duplex
cable
10 kilome-
ters/32,820
feet
7.6 cm /
3 inches 1270-1350 µm without open
fiber control
(non-OFC)
Copper Impedance con-
trolled for 150
ohm differential
system
Low skew,
shielded quad,
150 ohm cable
Polarized
interface
HSSDC
receptacle
13 meters/
42 feet See Table 2-2 N/A
* A low EMI optical cable design is recommended.

SilkWorm 2100 Reference 2-5
Setup and Installation 2
Connectors are keyed and must be inserted into the GBIC module connector in proper
alignment. Typically, the two optical connector plugs are different colors to facilitate
connector alignment.
To install a connector, remove the protective plug from the GBIC module connector. Ease
the plug into the GBIC module connector; forcing it can damage both the connector and
the GBIC module. Ensure the surface is clean and free of dust or debris before inserting
the connector into the GBIC module.
Serial Port Connection
The SilkWorm 2100 switch contains a serial port for initial configuration of the IP address
and for service recovery. Do not use the serial port during normal operation or for regular
maintenance. Remove the serial port cable and cover the port during normal operation of
the switch. (A cover is included with the switch.)
Only one command session can be active at a time and, because a telnet connection takes
priority, the serial port session is terminated when a telnet connection is made. The serial
port connection is restored when the telnet session is complete, but with login and a
password required.
The following are the settings for the serial port:
8-bit
No parity
One stop bit
9600 baud
No flow control
Table 2-2 Minimum Bend Radii - Copper Only (Over Temp -10C to +60C)
Cable AWG Static Radius
(one bend at given point) Dynamic radius (multiple bends at same
point)
30 (stranded) 1.5 cm / 0.6 inches 2.5cm / 1 inch
28 (stranded) 2 cm /0.8 inches 3cm / 1.2 inches
26 (stranded) 2.5cm / 1 inch 3.8cm / 1.5 inches
24 (stranded) 2.8cm / 1.1 inches 5.1cm / 2 inches
22 (stranded) 4.6cm / 1.8 inches 7.6cm / 3 inches
22 (solid) 4.8cm / 1.9 inches 7.6cm / 3 inches

2-6 SilkWorm 2100 Reference
Setup and Installation
2
The switch uses a standard straight-through serial cable with a male 9-pin D-subminiature
connector. Only pins 2, 3, and 5 are required; if pin 7 is used, this signal must always be
driven high. Following are the pinouts:
Table 2-1 SilkWorm 2100 Pinouts
To set the IP address via the serial port:
1. Connect the serial port to a PC/workstation. Use a standard serial cable with a
DB9 connector.
2. Establish a connection between the PC/workstation and the switch and power on the
switch. When the Power On Self Tests (POSTs) complete, the following prompt con-
firms the connection: switchName:userName>
3. Enter the ipAddrSet command on the command line. At the prompts, enter the
requested information: Fibre Channel IP address, Fibre Channel subnetmask, Ether-
net IP address, Ethernet subnetmask, and gateway address. For detailed information
on this command, see the Fabric OS manual.
4. Write the IP address on the label on the top of the front panel of the switch to facilitate
identification.
To reset factory defaults:
1. Connect the serial port to a PC/workstation. Use a standard serial cable with a
DB9 connector.
2. Establish a connection between the PC/workstation and the switch and power on the
switch. The following prompt confirms the connection: switchName:userName>
3. Enter switchDisable on the command line to disable the switch. For detailed infor-
mation on this command, see the Fabric OS manual.
4. Enter the configDefault command on the command line. For detailed information
on this command, see the Fabric OS manual.
5. Enter switchEnable on the command line to enable the switch. For detailed infor-
mation on this command, see the Fabric OS manual.
Pin Signal Description
1
2TxData Transmit data
3 RxData Receive data
4
5 GND Logic ground
6
7 CTS Clear to send
8
9