Brocade Communications Systems SilkWorm 12000 Quick user guide

Publication Number 53-0000148-05
Publication Date: 04/25/03
SilkWorm 12000
Hardware Reference Manual

Copyright © 2003, Brocade Communications Systems, Incorporated.
ALL RIGHTS RESERVED. Publication Number 53-0000148-05
BROCADE, the Brocade B weave logo, Brocade: the Intelligent Platform for Networking Storage, SilkWorm, and
SilkWorm Express, are trademarks or registered trademarks of Brocade Communications Systems, Inc. or its
subsidiaries 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.
FICON®is a registered trademark of IBM Corporation in the US and other countries.
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information in this material in no way grants a recipient any rights under Brocade's patents, copyrights, trade secrets or
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notice, and assumes no responsibility for its use.
The authors and Brocade Communications Systems, Inc. shall have no liability or responsibility to any person or entity
with respect to any loss, cost, liability, or damages arising from the information contained in this book or the computer
programs that accompany it.
Notice: The product described by this document may contain “open source” software covered by the GNU General
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products, view the licensing terms applicable to the open source software, and obtain a copy of the programming source
code, please visit http://www.brocade.com/support/oscd.
Export of technical data contained in this document may require an export license from the United States Government.

Brocade Communications Systems, Incorporated
Corporate Headquarters
1745 Technology Drive
San Jose, CA 95110
T: [phone]
F: [phone]
Email: [email protected]
Asia-Pacific Headquarters
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Tokyo, Japan 105-6036
T: [phone]
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Email: [e-mail]
European Headquarters
29, route de l’Aeroport
Case Postale 105
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T: [phone]
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Latin America Headquarters
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Document History
The table below lists all versions of the SilkWorm 12000 Hardware Reference Manual.
Document Title Publication Number Publication Date
SilkWorm 12000 Hardware Reference Manual 53-0000148-03 03/08/02
SilkWorm 12000 Hardware Reference Manual 53-0000148-04 02/25/03
SilkWorm 12000 Hardware Reference Manual 53-0000148-05 04/25/03

SilkWorm 12000 Hardware Reference v
Preface
What’s New in This Book. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Intended Audience . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix
Manual Conventions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . x
How to Get Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . xii
Chapter 1 Introducing the SilkWorm 12000
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
High Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Port Side of Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Non-port Side of Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
Managing the SilkWorm 12000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Chapter 2 Operating the SilkWorm 12000
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Powering the SilkWorm 12000 On and Off . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Interpreting LED Activity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Operating Information for the Port Cards. . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Operating Information for the CP Cards. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Operating Information for the Power Supplies. . . . . . . . . . . . . . . . . . . . . . . . 2-12
Operating Information for the AC Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Operating Information for the Blower Assemblies. . . . . . . . . . . . . . . . . . . . . 2-16
Operating Information for the WWN Card and Bezel . . . . . . . . . . . . . . . . . . 2-18
Operating Information for the Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Managing Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Interpreting POST Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

vi SilkWorm 12000 Hardware Reference
Chapter 3 Maintaining the SilkWorm 12000
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Environmental Status and Maintenance Commands . . . . . . . . . . . . . . . . . . . 3-2
Replacing a Port Card or Filler Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Replacing a CP Card. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13
Replacing a Power Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25
Replacing a Blower Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27
Replacing the Cable Management Tray . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-29
Replacing the Cable Management Guides . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30
Replacing the Chassis Door . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-31
Replacing the WWN Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32
Replacing the Chassis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-34
Replacing the 14U Rack Kit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-35
Replacing the Mid-mount Rack Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-35
Appendix A Product Specifications
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
SilkWorm 12000 Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Physical Dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
SilkWorm 12000 and Component Weights. . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Facility Requirements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Power Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4
Power Cord Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4
Environmental Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-7
General Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-8
Data Transmission Ranges . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
Port Card Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-9
CP Card Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-10
POST and Boot Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-12
Regulatory Compliance Specifications. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-13

SilkWorm 12000 Hardware Reference vii
Appendix B Troubleshooting and Diagnostics
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Troubleshooting the SilkWorm 12000 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Diagnostic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-5
Appendix C Setting Up and Installing Modems
Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
High Availability. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
Location of Components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Connecting Modems to the SilkWorm 12000. . . . . . . . . . . . . . . . . . . . . . . . . C-3
Setting Up a Remote Modem System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-4
Verifying the Modem Connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-5

viii SilkWorm 12000 Hardware Reference

SilkWorm 12000 Hardware Reference Manual ix
Preface
This manual provides comprehensive information to help you administer your SilkWorm switch and
your storage area network (SAN). This manual was developed to help technical experts operate,
maintain, and troubleshoot SAN products. A list of additional SAN resource reference materials is also
included. The sections that follow provide:
•A summary of updates to this document.
•The intended audience for this document.
•Information to help you use Brocade documentation.
•Information on additional SAN resources.
•How to get Technical Support.
What’s New in This Book
The following changes have been made since this book was released with part number
53-0000148-03:
•Installation Chapter: This information was moved into the QuickStart Guide.
•Configuration Chapter: This information was moved into the QuickStart Guide.
•Operating Chapter
-Updated Status LED behavior for fibre channel ports for Fabric OS v4.1.0
-Updated blower assembly LED behavior for Fabric OS v4.1.0
•Maintenance Chapter
-Added info about WWN card replacement procedure
-Added info about chassis replacement procedure
•Specifications Chapter
-Updated environmental specs
-Updated power cord specifications
-Added data transmission ranges table
-Updated battery warning
•Glossary
-The glossary was removed from the book and is now provided as a separate document
on the Brocade Documentation CD.
Intended Audience
This document is intended for use by systems administrators and technicians experienced with
networking, Fibre Channel, and SAN technologies.

xSilkWorm 12000 Hardware Reference Manual
Manual Conventions
This section lists text formatting conventions and important notices formats that are used in this
document.
Formatting
The following table describes the formatting conventions that are used in this book:
Notes, Cautions, and Warnings
The following notices appear in this document:
Note: A note provides a tip, emphasizes important information, or provides a reference to related
information.
Caution: A caution alerts you to potential damage to hardware, firmware, software, or data.
Warning: A warning alerts you to potential danger to personnel.
Convention Purpose
bold text •identifies command names
•identifies GUI elements
•identifies keywords/operands
•identifies text to enter at the GUI or CLI
italic text •provides emphasis
•identifies variables
•identifies paths and internet addresses
•identifies book titles and cross references
code text •identifies CLI output
•identifies syntax examples

SilkWorm 12000 Hardware Reference Manual xi
Brocade Documentation
The following related publications are provided on the Brocade Documentation CD-ROM and on the
Brocade Partner Web site:
•Brocade Fabric OS documentation
-Brocade Diagnostic and System Error Message Reference
-Brocade Fabric OS Procedures Guide
-Brocade Fabric OS Reference
-Brocade MIB Reference
•Brocade Fabric OS optional features documentation
-Brocade Advanced Performance Monitoring User's Guide
-Brocade Advanced Web Tools User's Guide
-Brocade Advanced Zoning User's Guide
-Brocade Distributed Fabrics User's Guide
-Brocade Fabric Watch User’s Guide
-Brocade ISL Trunking User's Guide
-Brocade QuickLoop User's Guide (v 3.1 only)
-Brocade Secure Fabric OS User's Guide
-Secure Fabric OS QuickStart Guide
•Brocade Hardware documentation
-Brocade SilkWorm 12000 QuickStart Guide (for v4.1 software)
-Brocade SilkWorm 3900 Hardware Reference (for v.4.1 software)
-Brocade SilkWorm 3800 Hardware Reference (for v.3.1 software)
-Brocade SilkWorm 3200 Hardware Reference (for v.3.1 software)
Release notes are available on the Brocade Partner Web site and are also bundled with the Fabric OS.
Additional Resource Information
For practical discussions about SAN design, implementation, and maintenance, Building SANs with
Brocade Fabric Switches is available through:
http://www.amazon.com
For additional Brocade documentation, visit the Brocade SAN Info Center and click on the Resource
Library location:
http://www.brocade.com
For additional resource information, visit the Technical Committee T11 Web site. This Web site
provides interface standards for high-performance and mass storage applications for fibre channel,
storage management, as well as other applications:
http://www.t11.org
For information about the Fibre Channel industry, visit the Fibre Channel Industry Association Web site:
http://www.fibrechannel.org

xii SilkWorm 12000 Hardware Reference Manual
How to Get Technical Support
Contact your switch supplier for hardware, firmware, and software support, including product repairs
and part ordering. To assist your support representative and to expedite your call, have the following
three sets of information immediately available when you call:
1. General Information
•Technical Support contract number, if applicable
•switch model
•switch operating system version
•error messages received
•supportshow command output
•detailed description of the problem and specific questions
•description of any troubleshooting steps already performed and results
2. Switch Serial Number
The switch serial number and corresponding bar code are provided on the serial number label, as
shown below.
:
The serial number label is located as follows:
•SilkWorm 2000 series switches: Bottom of chassis
•SilkWorm 3200 and 3800 switches: Back of chassis
•SilkWorm 3900 switches: Bottom of chassis
•SilkWorm 6400 and 12000 switches: Inside front of chassis, on wall to left of ports
3. Worldwide Name (WWN)
•SilkWorm 3900 and 12000 switches: Provide the license ID. Use the licenseidshow command
to display the license ID.
•All other SilkWorm switches: Provide the switch WWN. Use the wwn command to display the
switch WWN.
*FT00X0054E9
FT00X0054E9

SilkWorm 12000 Hardware Reference Manual 1-1
Chapter
1
Introducing the SilkWorm 12000
The SilkWorm 12000 is a high-performance 14U switch that can operate as a stand-alone switch or in a
fabric containing multiple switches. It is available with 32-ports, 64-ports, or 128 ports (two 64-port
switches in a single chassis), depending upon the number of port cards installed. It can contain up to two
logical switches: one for any port cards in slots 1-4, and one for any port cards in slots 7-10.
The SilkWorm 12000 includes the Fabric OS™ and is compatible with SilkWorm 2x00, 20x0, 3200,
3800, and 3900 switches.
Note: For information about commands and other information specific to the firmware version, refer
to the Fabric OS Procedures Guide or the Fabric OS Reference for that firmware version.
Overview
This chapter provides the following information:
•High Availability on page 1-1
•Port Side of Chassis on page 1-2
•Non-port Side of Chassis on page 1-3
•Managing the SilkWorm 12000 on page 1-4
High Availability
The SilkWorm 12000 is designed to provide high availability and redundancy. It includes two
redundant CP (control processor) cards; one CP card actively manages the SilkWorm 12000, and the
other acts as a standby to allow failover if required. Failover occurs automatically if the active CP card
fails. The CP cards can be replaced while the SilkWorm 12000 is operating if one CP card is replaced at
a time.
The SilkWorm 12000 has the following high availability features:
•Two redundant and hot-swappable control processor (CP) cards, with automatic failover
•Non-disruptive firmware download for Fabric OS v4.1.0 and later
•Up to eight hot-swappable 16-port cards
•Four redundant and hot-swappable power supplies
•Three redundant and hot-swappable blower assemblies
•WWN card that is hot-swappable in Fabric OS v4.1.0 and later
•Two redundant AC electrical inputs, each of which supplies power to the entire chassis.

1-2 SilkWorm 12000 Hardware Reference Manual
Introducing the SilkWorm 12000
1
Port Side of Chassis
The fibre channel ports support link speeds of 1 and 2 Gbits/sec (inbound and outbound), and
automatically negotiate to the highest common speed of all devices connected to the port. They are
compatiblewith short wave-length and long wave-length SFP (small form factor pluggable) transceivers,
universal and self-configuring, and are capable of individually becoming FL_Ports (fabric loop ports),
F_Ports (fabric ports), or E_Ports (expansion ports).
Figure 1-1 on page 1-2 shows the port side of the SilkWorm 12000, with the following components:
•Up to eight port cards, with 16 fibre channel SFP ports each.
•Two CP cards, each with a modem serial port, terminal serial port, and 10/100 Mbps ethernet
port.
•Four power supplies that are hot-swappable and have built-in fans.
•Two AC power connectors, each with an on/off AC power switch.
Figure 1-1 Port Side of the SilkWorm 12000
scale:
3/16" = 1"
Fig. 001
POWER SUPPLY 2
POWER SUPPLY 3
POWER SUPPLY 4
POWER SUPPLY 1
12345678910
200-240 VAC 12A 50-60 Hz 200-240 VAC 12A 50-60 Hz
!
d
c
b
a
11
d
10
c
9
b
8
a
d
c
b
a
3
d
2
c
1
b
0
a
!
d
c
b
a
11
d
10
c
9
b
8
a
d
c
b
a
3
d
2
c
1
b
0
a
!
d
c
b
a
11
d
10
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9
b
8
a
d
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b
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3
d
2
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1
b
0
a
!
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11
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3
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0
a
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10
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a
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b
0
a
Link
10/100 Mb/s
!
I O I O IRS - 232
Link
10/100 Mb/s
!
I O I O IRS - 232
!
!
!
!
!
!
!
!
POWER SUPPLY 1 & 3 POWER SUPPLY 2 & 4
CP Card
Exhaust
Vent
16-Port
Card
AC Power
Switch
AC Power
Connector
(for Power Supply 1 & 3) (for Power Supply 2 & 4)
AC Power
Switch
AC Power
Connector
Grounding
Strap
Connector
Power
Supply #4
Power
Supply #3
Filler
Panels
Power
Supply #2
Power
Supply #1
Cable
Management
Tray

SilkWorm 12000 Hardware Reference Manual 1-3
Introducing the SilkWorm 12000 1
Non-port Side of Chassis
Figure 1-2 shows the non-port side of the SilkWorm 12000 chassis with the following components:
•WWN card and bezel: The WWN card is underneath the bezel. It provides LEDs for monitoring
the switch from the non-port side and persistently stores WWN, IP addresses, switch name, and
serial number. The bezel provides labels for the LEDs.
•Blower assemblies - Three blower assemblies, individually hot-swappable.
For operating information about each component, refer to Chapter 2, Operating the SilkWorm 12000.
Figure 1-2 Non-port Side of SilkWorm 12000
scale:
3/16" = 1"
Fig. 006
10 pwr4
pwr3
pwr2
pwr1
987654321
Port Card and
CP Card LEDs
WWN
Bezel
Power Supply
LEDs
Blower
Fault
LED
Blower
Handle
Blower
Assembly
#3
Blower
Assembly #2
Blower
Assembly #1
Blower
Power
LED

1-4 SilkWorm 12000 Hardware Reference Manual
Introducing the SilkWorm 12000
1
Managing the SilkWorm 12000
The SilkWorm 12000 can be managed using any of the management options listed in Table 1-1. These
options can be used to monitor the fabric topology, port status, physical status, and other information to
aid in performance analysis and system debugging.
For information about inband support, contact the switch provider.
Note: For information about upgrading the Fabric OS, refer to the Fabric OS Procedures Guide or the
Fabric Manager User’s Guide.
Table 1-1 Management Options for SilkWorm 12000
Management Tool Out-of-band
Support
Command line interface
For ethernet, up to two admin sessions and four user sessions at same time. For
details, refer to the Fabric OS Procedures Guide and the Fabric OS Reference.
Sectelnet and Secure Shell clients are both supported.
Ethernet or serial
connection
Fabric Manager
Fabric Manager v3.0.2c or later required. For information refer to the Fabric
Manager User’s Guide.
Ethernet
Web Tools
For information refer to the Advanced Web Tools User’s Guide.
Ethernet
Standard SNMP applications
For information refer to the MIB Reference.
Ethernet
Management server
For information about MS, refer to the Fabric OS Procedures Guide and the
Fabric OS Reference.
Ethernet

SilkWorm 12000 Hardware Reference Manual 1-5
Introducing the SilkWorm 12000 1
Supported Features
The SilkWorm 12000 supports the following optional software, which can be activated with the
purchase of the corresponding license key:
•Web Tools
Provides a graphical interface that allows monitoring and management of fabrics and individual
switches and ports from a standard workstation. For more information refer to the Advanced
Web Tools User’s Guide.
•Zoning
Allows partitioning of fabrics into logical group and restriction of access. For more information
refer to the Advanced Zoning User’s Guide.
•Secure Fabric OS
For information refer to the Secure Fabric OS User’s Guide.
•ISL Trunking
Enables distribution of traffic across shared bandwidth. For more information refer to the ISL
Trunking User’s Guide.
•Fabric Watch
Allows monitoring of fabric and setting of alarms. For more information refer to the Fabric
Watch User’s Guide.
•Performance Monitoring
Allows end-to-end monitoring of the fabric. For more information refer to the Advanced
Performance Monitoring User’s Guide.
•Extended Fabrics
Allows increased distance between two connected switches or between a switch and an ATM
gateway. For more information refer to the Distributed Fabrics User’s Guide, which also
covers Remote Switch.
•Remote Switch
Allows remote switches to be in the same fabric. For more information refer to the Distributed
Fabrics User’s Guide.

1-6 SilkWorm 12000 Hardware Reference Manual
Introducing the SilkWorm 12000
1

SilkWorm 12000 Hardware Reference Manual 2-1
Chapter
2
Operating the SilkWorm 12000
The SilkWorm 12000 is engineered for reliability and requires no routine operational steps or
maintenance. This chapter provides information about the LEDs for each individual component and
basic information about diagnostic tests.
The status of individual components can be determined through the LEDs (see Interpreting LED
Activity on page 2-2), or through the CLI commands that are described in Environmental Status and
Maintenance Commands on page 3-2.
It is also possible to set up monitoring alerts using SNMP, syslog, or Fabric Watch (if a Fabric Watch
license is available). Fabric Watch alarms can be configured for each component. Refer to the Fabric
Watch User’s Guide for information about the types of alarms and how to configure them.
Note: The SilkWorm 12000 only detects modems during power on or reboot. If the SilkWorm 12000
is operating when a modem is attached, the modem is not detected until the next reboot. To
install a modem, refer to Appendix C, Setting Up and Installing Modems.
If Secure Mode is enabled on one or both switches, placing the two switches from the same
SilkWorm 12000 in separate fabrics is not supported.
Overview
This chapter provides the following information:
•Powering the SilkWorm 12000 On and Off on page 2-2
•Interpreting LED Activity on page 2-2
•Operating Information for the Port Cards on page 2-3
•Operating Information for the CP Cards on page 2-7
•Operating Information for the Power Supplies on page 2-12
•Operating Information for the AC Panel on page 2-15
•Operating Information for the Blower Assemblies on page 2-16
•Operating Information for the WWN Card and Bezel on page 2-18
•Operating Information for the Chassis on page 2-20
•Managing Cables on page 2-20
•Interpreting POST Results on page 2-21

2-2 SilkWorm 12000 Hardware Reference Manual
Operating the SilkWorm 12000
2
Powering the SilkWorm 12000 On and Off
Note: The SilkWorm 12000 only detects modems during power on or reboot. If modems will be in use,
connect them to the SilkWorm 12000 before powering on the chassis.
To power the SilkWorm 12000 on:
Verify both power cords are connected to the AC power connectors on the front of the chassis, and
flip both AC power switches to “1”. The switches illuminate when on. For information about
connecting the power cords, refer to the SilkWorm 12000 QuickStart Guide.
Caution: Ensure POST has completed before entering any commands.
To power the SilkWorm 12000 off:
Flip both AC power switches to “0”. To remove all sources of power from the switch, disconnect
both cables from the power source.
Note: Removing all power from the switch triggers a system reset. When power is restored, all
devices are returned to the initial state and the switch runs POST.
Interpreting LED Activity
System activity and status can be determined through the activity of the LED indicators on the switch.
There are three possible LED states:
•No light
•Steady light, in one of the following colors:
-Green
-Orange (may be referred to as “amber” in other documentation)
-Yellow (appears when both green and orange LED elements are lit)
•Flashing light (green, orange, or yellow)
The LEDs may flash green, yellow, or orange while the switch is booting or while POST or other
diagnostic tests are running. This is normal, and does not indicate a problem unless the LEDs continue to
indicate a possible problem after boot, POST, and any diagnostic tests have completed.
Any errors are listed in the error log. For information about the error log, refer to the Diagnostics and
Status chapter of the Fabric OS Procedures Guide.