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Catalyst 3750 Metro Switch Hardware Installation Guide

April 2012

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• Turn the television or radio antenna until the interference stops.

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• Plug the equipment into an outlet that is on a different circuit from the television or radio. (That is, make certain the equipment and the television or radio are on circuits controlled by different circuit breakers or fuses.)

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Catalyst 3750 Metro Switch Hardware Installation Guide

CONTENTS

Preface vii

Audience i-vii

Purpose i-vii

Organization i-vii

Conventions i-viii

Related Publications i-ix

Obtaining Documentation and Submitting a Service Request ix

Product Overview 1-1

Features 1-1

Front Panel Description 1-2

Console Port 1-3 10/100 and 10/100/1000 Ports 1-3 SFP Module Slots 1-3 LEDs 1-4

System LED 1-4 Power LEDs 1-5 Master LED 1-5 Port LEDs and Modes 1-5

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Rear Panel Description 1-7

Power Connectors 1-7

Power Supply Connector 1-7

Management Options 1-7

Network Configurations 1-8

Switch Installation 2-1

Preparing for Installation 2-1

Warnings 2-1 Installation Guidelines 2-4 Verifying Package Contents 2-5 Verifying Switch Operation 2-5

Connecting a PC or Terminal to the Console Port 2-6 Powering On the Switch and Running POST 2-7

Catalyst 3750 Metro Switch Hardware Installation Guide

iii

Contents

Powering Off the Switch and Disconnecting the Console Port 2-7

Installing the Switch 2-7

Rack-Mounting 2-7

Removing Screws from the Switch 2-8 Attaching Brackets to the Switch 2-8 Mounting the Switch in a Rack 2-11 Attaching the Cable Guide 2-12

Wall-Mounting 2-12

Attaching the Brackets to the Switch for Wall-Mounting 2-12 Mounting the Switch on a Wall 2-13 Table- or Shelf-Mounting 2-14

Installing and Removing SFP Modules 2-14

Installing SFP Modules into SFP Module Slots 2-15 Removing SFP Modules from SFP Module Slots 2-16

Connecting to the 10/100 Ports 2-17

Connecting to an SFP Module 2-18

Connecting to a Fiber-Optic SFP Module 2-19 Connecting to 1000BASE-T SFP Modules 2-20

Where to Go Next 2-21

Connecting the Power Supply 3-1

Connecting to AC Power 3-1

Removing the AC Power Supply 3-3

Connecting to DC Power 3-4

Preparing for Installation 3-4 Grounding the Switch 3-5

Preparing the Ground Wire 3-5

Connecting the Grounding Wire to Earth Ground 3-7 Installing the DC Power Supply in the Switch 3-7 Wiring the DC-Input Power Source 3-9

Removing the DC Power Supply 3-12

Connecting to Both AC and DC Power in the Switch 3-13

Troubleshooting 4-1

Diagnosing Problems 4-1

Verify Switch POST Results 4-2 Monitor Switch LEDs 4-2

Catalyst 3750 Metro Switch Hardware Installation Guide

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Verify Switch Connections 4-2

Bad or Damaged Cable 4-2 Ethernet and Fiber Cables 4-3 Link Status 4-3 Transceiver Module Port Issues 4-3 Port and Interface Settings 4-3 Ping the End Device 4-4 Spanning Tree Loops 4-4

Monitor Switch Performance 4-4

Speed, Duplex, and Autonegotiation 4-4 Autonegotiation and NIC Cards 4-5 Cabling Distance 4-5

Clearing the Switch IP Address and Configuration 4-5

Finding the Switch Serial Number 4-6

Contents

Technical Specifications A-1

Connector and Cable Specifications B-1

Connector Specifications B-1

10/100 Ports B-1

Connecting to 10BASE-T- and 100BASE-TX-Compatible Devices B-2

100BASE-FX Ports B-2

Connecting to 1000BASE-T Devices B-3 SFP Module Ports B-4 Console Port B-4

Cable and Adapter Specifications B-5

SFP Module Cable Specifications B-5 Two Twisted-Pair Cable Pinouts B-6 Four Twisted-Pair Cable Pinouts for 10/100 Ports B-7 Identifying a Crossover Cable B-8 Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports B-8 Adapter Pinouts B-9

Configuring the Switch with the CLI-Based Setup Program C-1

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Taking Out What You Need C-2

Connecting to the Console Port C-3

Starting the Terminal-Emulation Software C-3

Connecting to a Power Source C-4

Catalyst 3750 Metro Switch Hardware Installation Guide

NDEX

Contents

Entering the Initial Configuration Information C-4

IP Settings C-4 Completing the Setup Program C-5

Connecting to an Ethernet Port C-7

Catalyst 3750 Metro Switch Hardware Installation Guide

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Audience

Preface

This guide is for the networking or computer technician responsible for installing the Catalyst 3750 Metro switch. We assume that you are familiar with the concepts and terminology of Ethernet and local area networking. If you are interested in more training and education in these areas, learning opportunities including training courses, self-study options, seminars, and career certifications programs are available on the Cisco Training & Events web page:

http://www.cisco.com/web/learning/index.html

Purpose

This guide documents the hardware features of the Catalyst 3750 Metro switch. It describes the physical and performance characteristics of the switch, explains how to install it, and provides troubleshooting information.

This guide does not describe system messages that you might receive or how to configure your switch. For more information, see the switch software configuration guide, the switch command reference, and the switch system message guide on the Cisco.com Product Documentation home page. For information about the standard Cisco IOS Release 12.1 or 12.2 commands, see the Cisco IOS documentation set from the Cisco.com home page by choosing Support > Documentation > Product and Support Documentation/Cisco IOS Software.

Organization

This guide is organized into these chapters:

Chapter 1, “Product Overview,” is a physical and functional overview of the switch. This chapter

describes the switch ports, the standards they support, and the switch LEDs.

Chapter 2, “Switch Installation,” includes procedures on how to power on the switch; how to install the

switch in a rack, on a wall, on a table, or shelf; and how to make port connections.

Chapter 3, “Connecting the Power Supply,” describes how to connect the AC and DC power supply units

and how to remove the units.

Chapter 4, “Troubleshooting,” describes how to identify and resolve some of the problems that might

arise when you install the switch and how to identify the serial number when it is necessary to call technical support for help.

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Catalyst 3750 Metro Switch Hardware Installation Guide

vii

Conventions

Appendix A, “Technical Specifications,” lists the physical and environmental specifications for the

switch and the regulatory agency approvals.

Appendix B, “Connector and Cable Specifications,” describes the connectors, cables, and adapters that

you use to connect to the switch.

Appendix C, “Configuring the Switch with the CLI-Based Setup Program,” provides a quick

step-by-step installation and setup procedure for a switch.

Conventions

This document uses these conventions and symbols for notes, cautions, and warnings:

Note Means reader take note. Notes contain helpful suggestions or references to materials not contained in

this manual.

Caution Means reader be careful. In this situation, you might do something that could result in equipment

damage or loss of data.

Preface

Warning

IMPORTANT SAFETY INSTRUCTIONS

This warning symbol means danger. You are in a situation that could cause bodily injury. Before you work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar with standard practices for preventing accidents. Use the statement number provided at the end of each warning to locate its translation in the translated safety warnings that accompanied this device.

SAVE THESE INSTRUCTIONS

Statement 1071

The safety warnings for this product are translated into several languages in the Regulatory Compliance and Safety Information for the Catalyst 3750 Metro Switch that ships with the product. The EMC

regulatory statements are also included in that guide.

viii

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Preface

Related Publications

These documents provide complete information about the switch and are available from this Cisco.com site:

http://www.cisco.com/en/US/products/hw/switches/ps5532/tsd_products_support_series_home.html

Note Before installing, configuring, or upgrading the switch, see the release notes on Cisco.com for the latest

information.

• Release Notes for the Catalyst 3750 Metro Switch

• Catalyst 3750 Metro Switch Getting Started Guide

• Regulatory Compliance and Safety Information for the Catalyst 3750 Metro Switch

• Catalyst 3750 Metro Switch Software Configuration Guide

• Catalyst 3750 Metro Switch Command Reference

• Catalyst 3750 Metro Switch System Message Guide

Related Publications

• Catalyst 3750 Metro Switch Hardware Installation Guide

These compatibility matrix documents are available from this Cisco.com site:

http://www.cisco.com/en/US/products/hw/modules/ps5455/products_device_support_tables_list.html

• Cisco Gigabit Ethernet Transceiver Modules Compatibility Matrix

• Cisco 100-Megabit Ethernet SFP Modules Compatibility Matrix

• Cisco CWDM SFP Transceiver Compatibility Matrix

• Cisco Small Form-Factor Pluggable Modules Compatibility Matrix

• Compatibility Matrix for 1000BASE-T Small Form-Factor Pluggable Modules

Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation, submitting a service request, and gathering additional information, see the monthly What’s New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at:

http://www.cisco.com/en/US/docs/general/whatsnew/whatsnew.html

Subscribe to the What’s New in Cisco Product Documentation as a Really Simple Syndication (RSS) feed and set content to be delivered directly to your desktop using a reader application. The RSS feeds are a free service and Cisco currently supports RSS version 2.0.

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Catalyst 3750 Metro Switch Hardware Installation Guide

Related Publications

Preface

Catalyst 3750 Metro Switch Hardware Installation Guide

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Features

CHAP T ER

Product Overview

The Catalyst 3750 Metro switch, also referred to as the switch, is a stackable metro Ethernet switch that can be used as customer-located equipment (CLE) to connect to enterprise customer routers or switches. You can connect other devices to the switch, including Cisco IP phones, a Cisco Wireless Access Point, workstations, servers, and PCs. This chapter provides a functional overview of the switch.

These topics are included:

• Features, page 1-1

• Front Panel Description, page 1-2

• Rear Panel Description, page 1-7

• Management Options, page 1-7

You can deploy the switch as an aggregation switch. You can aggregate Ethernet traffic from other network devices with 10BASE-T, 100BASE-TX, and 1000BASE small-form factor pluggable (SFP) modules (1000BASE-T, 1000BASE-BX, 1000BASE-SX, 1000BASE-LX/LH, or 1000BASE-ZX SFP modules). Refer to the switch software configuration guide for examples that show how you might deploy Catalyst 3750 Metro switches in your network.

These are the switch features:

• Hardware

–

24 10/100 Ethernet ports

–

4 small form-factor pluggable (SFP) module slots. Two are standard SFP module ports, and two are enhanced-services SFP module ports. The enhanced-services ports support multiprotocol label switching (MPLS), hierachical quality of service (QoS), and enhanced 802.1Q tunneling.

For information about port numbering, see the “Front Panel Description” section on page 1-2.

–

2 power supply slots that support AC or DC input

For instructions on installing power supply units, see Chapter 3, “Connecting the Power

Supply.”

• The switch supports these SFP modules:

–

100BASE-FX (only in the standard SFP module ports)

–

1000BASE-BX

–

1000BASE-LX

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Catalyst 3750 Metro Switch Hardware Installation Guide

1-1

Front Panel Description

SYST

RPS

MASTR

STAT

DUPLX

SPEED

STACK

1 1

1 2

1 3

1 4

1 5

1 6

1 7

1 8

1 9

2 0

2 1

2 2

2 3

2 4

Catalyst 3750 Metro

series

97424

11X

12X

13X

14X

23X

24X

ES PORTS

–

1000BASE-SX

–

1000BASE-T

–

1000BASE-ZX

–

Coarse wavelength-division multiplexing (CWDM)

Note When you install 1000BASE-T SFP modules in the standard ports, they can operate at 10,

100, or 1000 Mb/s in full-duplex mode. When you install 1000BASE-T SFP modules in the enhanced-services ports, they operate only at 1000 Mb/s.

• Configuration

–

For 10/100 ports, autonegotiates the speed and the duplex settings

–

For standard ports, autonegotiates the speed and the duplex settings

• Power redundancy through an optional second power supply

Front Panel Description

Chapter 1 Product Overview

The switch FastEthernet ports are numbered 1 through 24 (in software they are numbered fastethernet1/0/1 to fastethernet1/0/24). These ports are grouped into pairs. The first member of the pair (port 1) is above the second member (port 2) on the far left, as shown in Figure 1-1. Port 3 is above port 4, and so on.

Figure 1-1 Catalyst 3750 Metro Switch Front Panel

1 Console port 3 Standard SFP module ports

2 10/100 ports 4 Enhanced-services SFP module ports

The standard SFP module ports are numbered 1 and 2 (left to right). In software, they are numbered gigabitethernet1/0/1 and gigabitethernet1/0/2. The enhanced-services SPF module ports are numbered 1 and 2 (left to right). In software, they are numbered gigabitethernet 1/1/1 and gigabitethernet 1/1/2.

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Catalyst 3750 Metro Switch Hardware Installation Guide

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Chapter 1 Product Overview

Console Port

You can connect the switch to a PC through the console port by using the supplied RJ-45-to-DB-9 female cable. If you want to connect the switch console port to a terminal, you need to provide an RJ-45-to-DB-25 female DTE adapter. You can order a kit (part number ACS-DSBUASYN=) containing that adapter from Cisco. For console port and adapter pinout information, see Appendix B, “Connector

and Cable Specifications.”

10/100 and 10/100/1000 Ports

You can set the 10/100 ports on the switch to operate in any combination of half duplex, full duplex, 10 Mb/s or 100 Mb/s. You can set the standard 1000BASE-T SFP module ports to operate in 10, 100, or 1000 Mb/s in full duplex. The 1000BASE-T SFP module operates only at 1000 Mb/s in the enhanced-services ports. You can also set these ports for speed and duplex autonegotiation in compliance with IEEE 802.3ab. (The default setting is autonegotiate.)

When you set the port for autonegotiation, it identifies the speed and duplex settings of the attached device and advertises its own capabilities. If the connected device also supports autonegotiation, the switch port negotiates the best connection (that is, the fastest line speed that both devices support and full-duplex transmission if the attached device supports it) and configures itself accordingly. In all cases, the attached device must be within 100 meters (328 feet).

100BASE-TX and 1000BASE-T traffic requires a Category 5 or higher cable. 10BASE-T traffic can use Category 3 or Category 4 cables. When you connect the switch to workstations, servers, routers, and Cisco IP Phones, be sure that the cable is a straight-through cable. When you connect the switch to switches or hubs, use a crossover cable. When you use a straight-through or crossover cable for 1000BASE-T connections, be sure to use a twisted four-pair, Category 5 or higher cable for proper operation. Pinouts for the cables are described in Appendix B, “Connector and Cable Specifications.”

You can use the mdix auto interface configuration command to enable the automatic crossover feature. When the automatic crossover feature is enabled, the switch detects the required cable type and configures the interfaces accordingly. Therefore, you can use either a crossover or a straight-through cable for all connections to an Ethernet port on the switch.

Front Panel Description

The automatic crossover feature is disabled by default. For configuration information for this feature, refer to the switch software configuration guide or the switch command reference.

SFP Module Slots

The switch uses Gigabit Ethernet SFP modules to establish fiber-optic connections. These transceiver modules are field-replaceable, providing the uplink interfaces when inserted in an SFP module slot. You can use the SFP modules for Gigabit uplink connections to other switches. You use fiber-optic cables with or MT-RJ LC or MT-RJ connectors to connect to a fiber-optic SFP module. You use Category 5 or higher cable with RJ-45 connectors to connect to a copper SFP module.

When you install 1000BASE-T SFP modules in the standard ports, they can operate at 10, 100, or 1000 Mb/s in full-duplex mode. When you install 1000BASE-T SFP modules in the enhanced-services ports, they operate only at 1000 Mb/s. The switch supports 100BASE-FX SFP modules only in standard ports. See the “Features” section on page 1-1 for a list of SFP modules that the switch supports.

Refer to the Release Notes for the Catalyst 3750 Metro Switch for the most current list of Cisco SFP module options that the switch supports. For more information about these SFP modules, refer to your SFP module documentation.

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Catalyst 3750 Metro Switch Hardware Installation Guide

1-3

Front Panel Description

PWR A

SYST

PWR B

MASTR

STAT

DUPLX

SPEED

STACK

MODE

97427

11X

12X

13X

14X

23X

24X

CONSOLE

21 3 4 8765 9

LEDs

Chapter 1 Product Overview

In addition to supporting the features described previously, the enhanced-services SFP modules support autonegotiation. Refer to the software guides for this switch for information about the features of the enhanced-services ports.

You can use the switch LEDs to monitor switch activity and performance. Figure 1-2 shows the switch LEDs and the Mode button that you use to select one of the port modes.

Figure 1-2 Catalyst 3750 Metro Switch LEDs

System LED

1-4

Catalyst 3750 Metro Switch Hardware Installation Guide

1 Mode button 6 Master LED

2 Stack LED (not used) 7 Power B LED

3 Speed LED 8 Power A LED

4 Duplex LED 9 System LED

5 Status LED 10 Port LED

The System LED shows whether the system is receiving power and is functioning properly.

Table 1-1 lists the LED colors and their meanings.

Table 1-1 System LED

Color System Status

Off System is not powered on.

Green System is operating normally.

Amber System is receiving power but is not functioning properly.

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Chapter 1 Product Overview

Power LEDs

Master LED

Front Panel Description

The switch supports up to two power supplies. The PWR A and PWR B LEDs show the status of the power supply in power slot A and power slot B, respectively. Tab l e 1-2 lists the LED colors and their meanings.

Table 1-2 Power LED Status Indicators

Color Status

Off The power supply is not installed.

Green The power supply is connected and operating correctly.

Amber The power supply is installed but is either in a fault condition or is not connected

to a valid input power source.

The power LEDs for slot A and slot B work independently of each other.

The Master LED is used in stacking. For this product, which does not support stacking, the Master LED is green.

Port LEDs and Modes

Each RJ-45 port and SFP module slot has a port LED. These port LEDs, as a group or individually, display information about the switch and about the individual ports. The port modes determine the type of information that the port LEDs display. Table 1-3 lists the mode LEDs and their associated port modes and meanings.

To select or change a mode, press the Mode button until the desired mode is highlighted. When you change port modes, the meanings of the port LED colors also change. Ta ble 1-4 explains how to interpret the port LED colors in different port modes.

Table 1-3 Port Mode LEDs

Mode LED Port Mode Description

STAT Port status The port status. This is the default mode.

DUPLX Port duplex mode The port duplex mode: full duplex or half duplex.

SPEED Port speed The port operating speed: 10 or 100 10, 100, or 1000 Mb/s.

STACK Not used.

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Catalyst 3750 Metro Switch Hardware Installation Guide

1-5

Front Panel Description

Table 1-4 Meaning of LED Colors in Different Modes on the Switch

Port Mode LED Color Meaning

STAT (port status)

DUPLX (duplex)

SPEED

STACK (stack member)

1. CRC = cyclic redundancy check

Off No link, or port was administratively shut down.

Green Link present.

Flashing green Activity. Port is sending or receiving data.

Alternating green-amber

Link fault. Error frames can affect connectivity, and errors such as excessive collisions, CRC

errors, and alignment and jabber errors

are monitored for a link-fault indication.

Amber Port is blocked by Spanning Tree Protocol (STP) and is not

forwarding data.

Note After a port is reconfigured, the port LED can remain

amber for up to 30 seconds as STP checks the switch for possible loops.

Flashing

Port is blocked by STP and is sending or receiving packets.

amber

Off Port is operating in half duplex.

Green Port is operating in full duplex.

10/100 ports

Off Port is operating at 10 Mb/s.

Green Port is operating at 100 Mb/s.

SFP ports

Off Port is operating at 10 Mb/s.

Green Port is operating at 100 Mb/s.

Flashing green Port is operating at 1000 Mb/s.

Note 1000BASE-T SFP modules can operate at 10, 100, or

1000 Mb/s in full-duplex mode only in standard SFP ports.

Not used.

Chapter 1 Product Overview

1-6

Catalyst 3750 Metro Switch Hardware Installation Guide

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Chapter 1 Product Overview

97425

STACK 1

Rear Panel Description

The switch rear panel has two power slots, a grounding lug, and two StackWise ports (not used). (See

Figure 1-3.)

Figure 1-3 Catalyst 3750 Metro Switch Rear Panel

1 StackWise ports (not used) 3 Power slot A (shown with an installed AC

2 Grounding lug (used with a DC power

supply)

Rear Panel Description

power supply)

4 Power slot B

Power Connectors

A power supply that is installed in power slot A powers the switch. This power supply is a field-replaceable unit (FRU). You can connect an optional FRU power supply in slot B to provide backup power if power supply A fails. You can power the switch by using either an AC power supply, a DC power supply, or a combination of the two.

Power Supply Connector

The power supply is an autoranging unit that supports input voltages between 100 and 240 VAC. Use the supplied AC power cord to connect the AC power connector to an AC power outlet. See Chapter 3,

“Connecting the Power Supply,” for instructions on how to connect the DC power.

Management Options

The switch offers several management options:

• Cisco IOS command-line interface (CLI)

You can fully configure and monitor the switch from the CLI. You can access the CLI either by connecting your management station directly to the switch console port or by using Telnet from a remote management station. See Appendix C, “Configuring the Switch with the CLI-Based

Setup Program,” and refer to the Catalyst 3750 Metro Switch Command Reference on Cisco.com for

more information about using the CLI.

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1-7

Management Options

Chapter 1 Product Overview

• CiscoView application

The CiscoView device-management application displays the switch image that you can use to set configuration parameters and to view switch status and performance information. The CiscoView application, which you purchase separately, can be a standalone application or part of a Simple Network Management Protocol (SNMP) platform. Refer to the CiscoView documentation for more information.

• SNMP network management

You can manage switches from a SNMP-compatible management station that is running platforms such as HP OpenView or SunNet Manager. The switch supports a comprehensive set of Management Information Base (MIB) extensions and four Remote Monitoring (RMON) groups. Refer to the switch software configuration guide on Cisco.com and the documentation that came with your SNMP application for more information.

• Cisco Intelligence Engine 2100 (IE2100)

Cisco IE200 Series Configuration Registrar is a network management device that works with embedded CNS agents in the switch software. You can automate initial configurations and configuration updates by generating switch-specific configuration changes, sending them to the switch, executing the configuration change, and logging the results.

Network Configurations

Refer to the switch software configuration guide on Cisco.com for network configuration concepts and examples of using the switch to create dedicated network segments and interconnecting the segments through Gigabit Ethernet connections.

1-8

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CHAP T ER

Switch Installation

This chapter describes how to start your switch and how to interpret the power-on self-test (POST) that ensures proper operation. It describes how to install the switch and make connections to the switch. Read the topics and perform the procedures in this order:

• Preparing for Installation, page 2-1

• Verifying Switch Operation, page 2-5

• Installing the Switch, page 2-7

• Installing and Removing SFP Modules, page 2-14

• Connecting to the 10/100 Ports, page 2-17

• Connecting to an SFP Module, page 2-18

• Where to Go Next, page 2-21

Preparing for Installation

This section covers these topics:

• Warnings, page 2-1

• Installation Guidelines, page 2-4

• Verifying Package Contents, page 2-5

• Verifying Switch Operation, page 2-5

Warnings

These warnings are translated into several languages in the Regulatory Compliance and Safety Information Guide for the Catalyst 3750 Metro Switch, which ships with the switch.

Warning

To prevent the switch from overheating, do not operate it in an area that exceeds the maximum recommended ambient temperature of 113•F (45•C). To prevent airflow restriction, allow at least 3 inches (7.6 cm) of clearance around the ventilation openings.

Statement 17B

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Catalyst 3750 Metro Switch Hardware Installation Guide

2-1

Preparing for Installation

Chapter 2 Switch Installation

Warning

Before working on equipment that is connected to power lines, remove jewelry (including rings, necklaces, and watches). Metal objects will heat up when connected to power and ground and can cause serious burns or weld the metal object to the terminals.

Statement 43

Do not stack the chassis on any other equipment. If the chassis falls, it can cause severe bodily injury and equipment damage.

Ethernet cables must be shielded when used in a central office environment.

Statement 48

Statement 171

To comply with safety regulations, mount switches on a wall with the front panel facing up.

Statement 266

Suitable for mounting on or over concrete or other non-combustible surface only.

Statement 345

Do not work on the system or connect or disconnect cables during periods of lightning activity.

Statement 1001

Warning

Read the installation instructions before connecting the system to the power source.

Statement 1004

This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that the protective device is rated not greater than: 15 A, 80 Vdc

Statement 1005

To prevent bodily injury when mounting or servicing this unit in a rack, you must take special precautions to ensure that the system remains stable. The following guidelines are provided to ensure your safety:

• This unit should be mounted at the bottom of the rack if it is the only unit in the rack.

• When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the heaviest component at the bottom of the rack.

• If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the unit in the rack.

Statement 1006

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Chapter 2 Switch Installation

Preparing for Installation

Warning

Class 1 laser product.

Avoid direct exposure to the laser beam.

Statement 1008

Statement 1012

This unit is intended for installation in restricted access areas. A restricted access area can be accessed only through the use of a special tool, lock and key, or other means of security.

Statement 1017

The plug-socket combination must be accessible at all times, because it serves as the main disconnecting device.

Statement 1019

A readily accessible two-poled disconnect device must be incorporated in the fixed wiring.

Statement 1022

This equipment must be grounded. Never defeat the ground conductor or operate the equipment in the absence of a suitably installed ground conductor. Contact the appropriate electrical inspection authority or an electrician if you are uncertain that suitable grounding is available.

Statement 1024

Warning

This unit might have more than one power supply connection. All connections must be removed to de-energize the unit.

Statement 1028

Only trained and qualified personnel should be allowed to install, replace, or service this equipment.

Statement 1030

Ultimate disposal of this product should be handled according to all national laws and regulations.

Statement 1040

For connections outside the building where the equipment is installed, the following ports must be connected through an approved network termination unit with integral circuit protection. 10/100/1000 Ethernet

Statement 1044

When installing or replacing the unit, the ground connection must always be made first and disconnected last.

No user-serviceable parts inside. Do not open.

Statement 1046

Statement 1073

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Chapter 2 Switch Installation

Warning

Caution To comply with the Telcordia GR-1089 Network Equipment Building Systems (NEBS) standard for

Installation of the equipment must comply with local and national electrical codes.

electromagnetic compatibility and safety, connect the Ethernet cables only to intrabuilding or unexposed wiring or cabling.

Note For a list of EMC regulatory statements, see the Regulatory Compliance and Safety Information for the

Catalyst 3750 Metro Switch.

Guidelines for Particulate Matter

Cisco Ethernet Switches are equipped with cooling mechanisms, such as fans and blowers. However, these fans and blowers can draw dust and other particles, causing contaminant buildup inside the chassis, which can result in a system malfunction.

You must install this equipment in an environment as free as possible from dust and foreign conductive material (such as metal flakes from construction activities).

These standard provide guidelines for acceptable working environments and acceptable levels of suspended particulate matter:

• Network Equipment Building Systems (NEBS) GR-63-CORE

Statement 1074

• National Electrical Manufacturers Association (NEMA) Type 1

• International Electrotechnical Commission (IEC) IP-20

Installation Guidelines

When you determine where to place the switch, be sure to observe these restrictions:

• When you connect cables from 10/100 ports and 1000BASE-T SFP module ports to other devices,

you can use cable lengths up to 328 feet (100 meters).

• See Table B-2 on page B-5 for a list of cable specifications for 1000BASE-SX, 1000BASE-LX,

1000BASE-BX, 1000BASE-ZX, and CWDM fiber-optic SFP module connections. Each port must match the wave-length specifications on the other end of the cable, and for reliable communications, the cable must not exceed the stipulated cable length.

Note When you use shorter distances of single-mode fiber cable, you might need to insert an

inline optical attenuator in the link to avoid overloading the receiver.

When the fiber-optic cable span is less than 15.5 miles (25 km), you should insert a 5-decibel (dB) or 10-dB inline optical attenuator between the fiber-optic cable plant and the receiving port on the 1000BASE-ZX SFP module at each end of the link.

• Operating environment must be within the ranges listed in Appendix A, “Technical Specifications.”

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Chapter 2 Switch Installation

• Clearance to front and rear panels should be such that

• Cabling must be away from sources of electrical noise, such as radios, power lines, and fluorescent

• Airflow around the switch and through the vents must be unrestricted.

• Temperature around the unit does not exceed 113°F (45°C).

Note If you install the switch in a closed or multirack assembly, the temperature around it might be

Preparing for Installation

–

You can easily read the front-panel indicators.

–

Access to ports is sufficient for unrestricted cabling.

Make sure that there is access to the rear of the rack if you are planning to stack the switches. If you do not have access to the rear panel, make sure that you cable the switches before you rack-mount them.

–

The AC power cord can reach from the AC power outlet to the connector on the switch rear panel.

lighting fixtures. Make sure the cabling is safely away from other devices that might damage the cables.

greater than normal room temperature.

Verifying Package Contents

Note Carefully remove the contents from the shipping container, and check each item for damage. If any item

is missing or damaged, contact your Cisco representative or reseller for support. Return all packing material to the shipping container, and save it.

The switch is shipped with these items:

• Catalyst 3750 Metro Switch Getting Started Guide

• Regulatory Compliance and Safety Information for the Catalyst 3750 Metro Switch

• AC power supply (installed) or a DC power supply (installed with ground lug installed)

• AC power cord (AC-powered switches)

• 2 DC terminal block plugs (used with DC-powered switches but shipped with both)

• One RJ-45-to-DB-9 adapter cable

• Mounting kit containing:

–

Four rubber feet for mounting the switch on a table

–

Two 19-inch rack-mounting brackets

–

Four Phillips flat-head screws for attaching the brackets to the switch

–

Four Phillips machine screws for attaching the brackets to a rack

–

Four Phillips truss-head screws and a bracket for mounting the switch on a wall

–

One cable guide and one black Phillips machine screw for attaching the cable guide to one of the mounting brackets

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Two terminal block plugs

–

One RPS connector cover with 2 number-4 panhead screws (not used with this switch)

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Verifying Switch Operation

Before installing the switch in a rack, on a wall, or on a table or shelf, you should power the switch and verify that the switch passes POST. These sections describe the steps required to connect a PC to the switch console port and to power on the switch:

• Connecting a PC or Terminal to the Console Port, page 2-6

• Powering On the Switch and Running POST, page 2-7

Connecting a PC or Terminal to the Console Port

To connect a PC to the console port, use the supplied RJ-45-to-DB-9 adapter cable. To connect the switch console port to a terminal, you need to provide a RJ-45-to-DB-25 female DTE adapter. You can order a kit (part number ACS-DSBUASYN=) containing that adapter from Cisco. For console port and adapter pinout information, see the “Cable and Adapter Specifications” section on page B-5.

You can use terminal-emulation software—frequently a PC application such as Hyperterminal or Procomm Plus—to make communication between the switch and your PC or terminal possible.

Follow these steps to connect the PC or terminal to the switch:

Chapter 2 Switch Installation

Step 1 Configure the baud rate and character format of the PC or terminal to match these console port default

characteristics:

• 9600 baud

• 8 data bits

• 1 stop bit

• No parity

• None (flow control)

Step 2 Use the supplied RJ-45-to-DB-9 adapter cable to insert the RJ-45 connector into the console port, as

shown in Figure 2-1.

Figure 2-1 Connecting to the Console Port

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1 Console port

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Chapter 2 Switch Installation

Step 3 Attach the DB-9 female DTE adapter of the RJ-45-to-DB-9 adapter cable to a PC, or attach an

appropriate adapter to the terminal.

Step 4 Start the terminal-emulation program if you are using a PC or terminal.

Powering On the Switch and Running POST

To power on the switch, follow these steps:

Step 1 Make sure that you have started the terminal emulation software program (such as ProComm,

HyperTerminal, tip, or minicom) from your management station. See the “Connecting a PC or Terminal

to the Console Port” section on page 2-6 for information on connecting to the switch console port.

Step 2 If you are using an AC power supply, connect one end of the AC power cord to the AC power connector

on the switch, and then connect the other end of the power cord to an AC power outlet.

Step 3 If you are using a DC power supply, see the “Connecting to DC Power” section on page 3-4 for

instructions on how to connect the DC power supply.

Step 4 Secure the power cord with the power cord retainer. For more information, see the “Connecting to AC

Power” section on page 3-1.

Installing the Switch

As the switch powers on, it begins POST, a series of tests that run automatically to ensure that the switch functions properly. When the switch begins POST, the System, the Power A, the Power B, the Master, the Status, the Duplex, the Speed, and the Stack LEDs turn green. The System LED blinks green, and the other LEDs remain continuous green. If POST fails, see Chapter 4, “Troubleshooting,” to determine a course of action.

When the POST is complete, the System LED remains green. The Power A LED remains green for some time and then resumes operating status. The other LEDs turn off and resume their operating status.

Powering Off the Switch and Disconnecting the Console Port

Disconnect the power cord from the switch. Disconnect the cable from the switch console port. Install the switch in a rack, on a wall, or on a table or shelf as described in the “Installing the Switch” section

on page 2-7.

Installing the Switch

This section describes these installation procedures:

• Rack-Mounting, page 2-7

• Wall-Mounting, page 2-12

• Table- or Shelf-Mounting, page 2-14

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Rack-Mounting

To install the switch in a 19-inch or 24-inch rack (24-inch racks require optional mounting hardware), follow the instructions described in these procedures:

Chapter 2 Switch Installation

• Removing Screws from the Switch, page 2-8

• Attaching Brackets to the Switch, page 2-8

• Mounting the Switch in a Rack, page 2-11

• Attaching the Cable Guide, page 2-12

Warning

• This unit should be mounted at the bottom of the rack if it is the only unit in the rack.

• When mounting this unit in a partially filled rack, load the rack from the bottom to the top with the heaviest component at the bottom of the rack.

• If the rack is provided with stabilizing devices, install the stabilizers before mounting or servicing the unit in the rack.

Statement 1006

Note Installing the switch in a 24-inch rack requires an optional bracket kit not included with the switch. You

can order a kit containing the 24-inch rack-mounting brackets and hardware from Cisco (part number RCKMNT-1RU).

Removing Screws from the Switch

If you plan to install the switch in a rack, you must first remove the screws in the switch chassis so that you can attach the mounting brackets. Figure 2-2 shows how to remove the chassis screws in a switch.

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Figure 2-2 Removing Screws from the Switch

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Attaching Brackets to the Switch

The bracket orientation and the brackets that you use depend on whether you are attaching the brackets for a 19-inch or a 24-inch rack. For 19-inch racks, use bracket part number 700-8209-XX; for 24-inch racks, use bracket part number 700-13248-XX. Figure 2-3 through Figure 2-7 show how to attach each type of bracket to one side of the switch. Follow the same steps to attach the second bracket to the opposite side.

Figure 2-3 Attaching Brackets for 19-Inch Racks, Front Panel Forward

Installing the Switch

1 Phillips flat-head screws

Figure 2-4 Attaching Brackets for 24-Inch Racks, Front Panel Forward

1 Phillips flat-head screws

Figure 2-5 Attaching Brackets for 19-Inch Racks, Rear Panel Forward

1 Phillips flat-head screws

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Figure 2-6 Attaching Brackets for 24-Inch Racks, Rear Panel Forward

1 Phillips flat-head screws

Figure 2-7 Attaching Brackets for 24-Inch Telco Racks

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Mounting the Switch in a Rack

After the brackets are attached to the switch, use the four supplied number-12 Phillips machine screws to securely attach the brackets to the rack, as shown in Figure 2-8.

Figure 2-8 Mounting the Switch in a Rack

Installing the Switch

1 Phillips machine screws

After the switch is mounted in the rack, perform these tasks to complete the installation, run the setup program, and access the switch:

• Connect to the console port, and start the emulation software. See the “Connecting to the Console

Port” section on page C-3 and the “Starting the Terminal-Emulation Software” section on page C-3.

• Power on the switch. See the “Connecting to a Power Source” section on page C-4.

• Run the setup program. See the “Completing the Setup Program” section on page C-5.

• Connect to the front-panel ports. See the “Connecting to the 10/100 Ports” section on page 2-17 and

the “Connecting to an SFP Module” section on page 2-18 to complete the installation.

To use the CLI, enter commands at the Switch> prompt through the console port by using a terminal program or through the network by using Telnet. For configuration information, refer to the switch software configuration guide or the switch command reference.

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Attaching the Cable Guide

We recommend that you attach the cable guide to prevent the cables from obscuring the front panel of the switch and the other devices that are installed in the rack. Use the supplied black screw, as shown in

Figure 2-9, to attach the cable guide to the left or right bracket.

Figure 2-9 Attaching the Cable Guide on the Switch

Chapter 2 Switch Installation

1 Cable guide screw

Wall-Mounting

To install the switch on a wall, follow these instructions:

• Attaching the Brackets to the Switch for Wall-Mounting, page 2-12

• Mounting the Switch on a Wall, page 2-13

Attaching the Brackets to the Switch for Wall-Mounting

Figure 2-10 shows how to attach two 19-inch brackets to one side of the switch. Follow the same steps

to attach the other two brackets to the opposite side.

Figure 2-10 Attaching the 19-inch Brackets for Wall-Mounting

1 Phillips truss-head screws

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Mounting the Switch on a Wall

For the best support of the switch and cables, make sure that the switch is attached securely to wall studs or to a firmly attached plywood mounting backboard. Mount the switch with the front panel facing up, as shown in Figure 2-11.

Installing the Switch

Warning

To comply with safety regulations, mount switches on a wall with the front panel facing up.

Statement 266

Suitable for mounting on or over concrete or other non-combustible surface only.

Statement 345

Figure 2-11 Mounting the Switch on a Wall

1 User-supplied screws

After the switch is mounted on the wall, perform these tasks to complete the installation, to run the setup program, and to access the switch:

• Connect to the console port, and start the emulation software. See the “Connecting to the Console

Port” section on page C-3 and the “Starting the Terminal-Emulation Software” section on page C-3.

• Power on the switch. See the “Connecting to a Power Source” section on page C-4.

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Installing and Removing SFP Modules

• Run the setup program. See the “Completing the Setup Program” section on page C-5.

• Connect to the front-panel ports. See the “Connecting to the 10/100 Ports” section on page 2-17 and

the “Connecting to an SFP Module” section on page 2-18 to complete the installation.

Table- or Shelf-Mounting

Follow these steps to install the switch on a table or shelf:

Step 1 Locate the adhesive strip with the rubber feet in the mounting-kit envelope. Attach the four rubber feet

to each of the corners on the bottom of the unit.

Step 2 Place the switch on the table or shelf near an AC power source.

After the switch is mounted on the table, you might need to perform these tasks to complete the installation, run the setup program, and access the switch:

• Connect to the console port, and start the emulation software. See the “Connecting to the Console

Port” section on page C-3 and the “Starting the Terminal-Emulation Software” section on page C-3.

• Power on the switch. See the “Connecting to a Power Source” section on page C-4.

Chapter 2 Switch Installation

• Run the setup program. See the “Completing the Setup Program” section on page C-5.

• Connect to the front-panel ports. See the “Connecting to the 10/100 Ports” section on page 2-17 and

the “Connecting to an SFP Module” section on page 2-18 to complete the installation.

Installing and Removing SFP Modules

These sections describe how to install and remove SFP modules. SFP modules are inserted into SFP module slots on the front of the switch. These field-replaceable modules provide uplink interfaces.

You can use any combination of SFP modules. Refer to the release notes for the list of SFP modules that the Catalyst 3750 Metro switch supports. Each port must match the wave-length specifications on the other end of the cable, and the cable must not exceed the stipulated cable length for reliable communications. See Table B-2 on page B-5 for cable specifications.

Use only Cisco SFP modules on the Catalyst 3750 Metro switch. Each SFP module has an internal serial EEPROM that is encoded with security information. This encoding provides a way for Cisco to identify and validate that the SFP module meets the requirements for the switch.

For detailed instructions on installing, removing, and cabling the SFP module, refer to your SFP module documentation.

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Installing SFP Modules into SFP Module Slots

This section provides instructions for how to install an SFP module that has a bale-clasp latch.

Caution We strongly recommend that you do not install or remove fiber-optic SFP modules with cables attached

because of the potential damage to the cables, the cable connector, or the optical interfaces in the SFP module. Disconnect all cables before removing or installing an SFP module.

Removing and installing an SFP module can shorten its useful life. Do not remove and insert SFP modules more often than is absolutely necessary.

Note Refer to the Installation Notes for the Cisco Small Form-Factor Pluggable Modules on cisco.com for

instructions to install SFPs that use other types of latches.

Figure 2-12 shows an SFP module that has a bale-clasp latch.

Installing and Removing SFP Modules

Figure 2-12 SFP Module with a Bale-Clasp Latch

To insert an SFP module into the SFP module slot, follow these steps:

Step 1 Attach an ESD-preventive wrist strap to your wrist and to a bare metal surface on the chassis.

Step 2 Find the send (TX) and receive (RX) markings that identify the top side of the SFP module.

Note On some SFP modules, the send and receive (TX and RX) markings might be replaced by arrows

that show the direction of the connection, either send or receive (TX or RX).

Step 3 Align the SFP module in front of the slot opening.

Step 4 Insert the SFP module into the slot until you feel the connector on the module snap into place in the rear

of the slot. (See Figure 2-13.)

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Figure 2-13 Installing an SFP Module into an SFP Module Slot

Chapter 2 Switch Installation

Step 5

For fiber-optic SFP modules, remove the dust plugs from the optical ports and store them for later use.

Caution Do not remove the dust plugs from the fiber-optic SFP module port or the rubber caps from the

fiber-optic cable until you are ready to connect the cable. The plugs and caps protect the SFP module ports and cables from contamination and ambient light.

Step 6 Insert the cable connector into the SFP module:

–

For fiber-optic SFP modules, insert the LC or MT-RJ cable connector into the SFP module.

–

For copper SFP modules, insert the RJ-45 cable connector into the SFP module.

Note When you connect to 1000BASE-T SFP modules, be sure to use a twisted four-pair, Category 5

or higher cable.

Removing SFP Modules from SFP Module Slots

To remove an SFP module from a module receptacle, follow these steps:

Step 1 Attach an ESD-preventive wrist strap to your wrist and to a bare metal surface on the chassis.

Step 2 Disconnect the cable from the SFP module.

Tip For reattachment, note which cable connector plug is send (TX) and which is receive (RX).

Step 3 For fiber-optic SFP modules, insert a dust plug into the optical ports of the SFP module to keep the

optical interfaces clean.

Step 4 Unlock and remove the SFP module, as shown in Figure 2-14.

Pull the bale-clasp latch out and down to eject the module. If the bale-clasp latch is obstructed and you cannot use your index finger to open it, use a small, flat-blade screwdriver or other long, narrow

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instrument to open the bale-clasp latch.

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Figure 2-14 Removing a Bale-Clasp Latch SFP Module by Using a Flat-Blade Screwdriver

1 Bale clasp

Connecting to the 10/100 Ports

Step 5

Grasp the SFP module between your thumb and index finger, and carefully remove it from the module slot.

Step 6 Place the removed SFP module in an antistatic bag or other protective environment.

Connecting to the 10/100 Ports

The switch 10/100 ports configure themselves to operate at the speed of attached devices. If the attached ports do not support autonegotiation, you can set the speed and duplex parameters. Connecting devices that do not autonegotiate or that have their speed and duplex parameters manually set can reduce performance or result in no linkage.

To maximize performance, choose one of these methods for configuring the Ethernet ports:

• Let the ports autonegotiate both speed and duplex.

• Set the port speed and duplex parameters on both ends of the connection.

Follow these steps to connect to 10BASE-T or 100BASE-TX devices:

Caution To prevent electrostatic-discharge (ESD) damage, follow your normal board and component handling

procedures.

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Step 1 When you connect to workstations, servers, routers, and Cisco IP Phones, connect a straight-through

cable to an RJ-45 connector on the front panel. (See Figure 2-15.) When you connect to switches or repeaters, use a crossover cable. (See the “Identifying a Crossover Cable” section on page B-8 for cable-pinout descriptions.)

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Figure 2-15 Connecting to an Ethernet Port

1 Connector cable

Chapter 2 Switch Installation

Category 5 or higher cable. See the “Four Twisted-Pair Cable Pinouts for 10/100 Ports” section

on page B-7 for more information.

Note You can use the mdix auto interface configuration command in the CLI to enable the automatic

crossover feature. When the automatic crossover feature is enabled, the switch detects the required cable type and configures the interfaces accordingly. Therefore, you can use either a crossover or a straight-through cable for all connections to an Ethernet port on the switch.

The automatic crossover feature is disabled by default. For configuration information for this feature, refer to the switch software configuration guide or the switch command reference.

Step 2 Connect the other end of the cable to an RJ-45 connector on the other device. Repeat Steps 1 through 3

to connect each device.

Connecting to an SFP Module

This section describes how to connect to SFP modules. For instructions on how to connect to fiber-optic SFP modules, see the “Connecting to a Fiber-Optic SFP Module” section on page 2-19 section. For instructions on how to connect to 1000BASE-T SFP modules, see the “Connecting to 1000BASE-T SFP

Modules” section on page 2-20 section.

For instructions about how to install or remove an SFP module, see the “Installing and Removing SFP

Modules” section on page 2-14.

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Connecting to a Fiber-Optic SFP Module

Follow these steps to connect a fiber-optic cable to an SFP module:

Caution Do not remove the rubber plugs from the SFP module port or the rubber caps from the fiber-optic cable

until you are ready to connect the cable. The plugs and caps protect the SFP module ports and cables from contamination and ambient light.

Before you connect to the SFP module, be sure that you understand the port and cabling stipulations in the “Installation Guidelines” section on page 2-4 and in the “SFP Module Slots” section on page 1-3. See Appendix B, “Connector and Cable Specifications,” for information about the LC on the SFP module.

Step 1 Remove the rubber plugs from the module port and fiber-optic cable, and store them for future use.

Step 2 Insert one end of the fiber-optic cable into the SFP module port (see Figure 2-16).

Step 3 Insert the other cable end into a fiber-optic receptacle on a target device.

Step 4 Observe the port status LED.

Connecting to an SFP Module

The LED turns green when the switch and the target device have an established link.

The LED turns amber while the STP discovers the network topology and searches for loops. This process takes about 30 seconds, and then the port LED turns green.

If the LED is off, the target device might not be turned on, there might be a cable problem, or there might be problem with the adapter installed in the target device. See Chapter 4, “Troubleshooting,” for solutions to cabling problems.

Figure 2-16 Connecting to a Fiber Optic SFP Module Port

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Step 5 If necessary, reconfigure and restart the switch or target device.

Caution For detailed instructions on removing the SFP modules, refer to your SFP documentation.

Connecting to 1000BASE-T SFP Modules

Follow these steps to connect a Category 5 or higher cable to a 1000BASE-T SFP module:

Caution To prevent ESD damage, follow your normal board and component handling procedures.

Step 1 When you connect to servers, workstations, and routers, insert a four twisted-pair, straight-through cable

in the RJ-45 connector. When you connect to switches or repeaters, insert a four twisted-pair, crossover cable. (See Figure 2-17.)

Chapter 2 Switch Installation

Note When you connect to a 1000BASE-T device, be sure to use a four twisted-pair, Category 5 or

higher cable.

Figure 2-17 Connecting to a 1000BASE-T SFP Module Port

1 RJ-45 connector

Step 2

Step 3 Observe the port status LED.

Insert the other cable end in an RJ-45 connector on a target device.

2-20

The LED turns green when the switch and the target device have an established link.

The LED turns amber while the STP discovers the network topology and searches for loops. This process takes about 30 seconds, and then the port LED turns green.

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Chapter 2 Switch Installation

Step 4 If necessary, reconfigure and restart the switch or target device.

Where to Go Next

If the default configuration is satisfactory, the switch does not need further configuration. You can use any of these management options to change the default configuration:

• Use the CLI to configure the switch from the console. See Appendix C, “Configuring the Switch

with the CLI-Based Setup Program,” and refer to the switch command reference on Cisco.com for

information on using the CLI with a Catalyst 3750 Metro switch.

• Start an SNMP application such as the CiscoView application.

Where to Go Next

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Where to Go Next

Chapter 2 Switch Installation

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Warning

CHAP T ER

Connecting the Power Supply

This chapter describes how to connect the AC and DC power supply units and how to remove them. See these sections:

• Connecting to AC Power, page 3-1

• Removing the AC Power Supply, page 3-3

• Connecting to DC Power, page 3-4

• Removing the DC Power Supply, page 3-12

• Connecting to Both AC and DC Power in the Switch, page 3-13

Only trained and qualified personnel should be allowed to install, replace, or service this equipment.

Statement 1030

Caution If you use only one power supply in your switch, always cover the other power slot with the slot cover.

Connecting to AC Power

To connect the switch to an AC-input power source, follow these steps:

Warning

This unit is intended for installation in restricted access areas. A restricted access area can be accessed only through the use of a special tool, lock and key, or other means of security.

Statement 1017

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Connecting to AC Power

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STACK 1

Chapter 3 Connecting the Power Supply

Before you start, locate a Phillips screwdriver and your AC power cord. Figure 3-1 shows the location of the AC power supply parts.

Figure 3-1 AC Power Supply

1 AC power cord retainer 3 Power-on restrictor

2 AC power connector 3

To insert an AC power supply into power supply slot A or B, follow these steps:

Step 1 Insert the power supply partially into the power supply slot (see Figure 3-2).

Figure 3-2 Inserting the AC Power Supply

Step 2

Slide the power-on restrictor to the left, toward the power connector (see Figure 3-3).

Note The power supply unit will not slide completely into the power slot if the power cord is already

inserted into the power connector.

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Figure 3-3 AC Power Cord Retainer and Power-On Restrictor

1 AC power cord retainer 2 Power-on

Removing the AC Power Supply

restrictor

Step 3

Step 4 Slide the power-on restrictor to the right in order to access the power connector (see Figure 3-3).

Step 5 Use a Phillips screwdriver to attach the screw at the lower-left of the power supply, and secure the power

Slide the power supply unit the rest of the way into the power slot.

supply unit in the switch chassis.

Step 6 Insert the power cord into the power connector.

Step 7 Snap the AC power cord retainer into place to secure the power cord (see Figure 3-3).

Step 8 Turn on the power at the power source.

Removing the AC Power Supply

To remove a power supply from power supply slot A or B, follow these steps:

Step 1 Turn off the power at its source.

Step 2 Detach the power cord retainer from the power cord.

Step 3 Remove the power cord from the power connector.

Step 4 Use a Phillips screwdriver to remove the screw at the lower-left that secures the power supply unit to

the switch chassis (see Figure 3-3).

Step 5 Slide the power-on restrictor toward the left.

Step 6 Remove the power supply unit from the power slot by pulling on the power-on restrictor (see Figure 3-3).

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Connecting to DC Power

To connect the switch to a DC-input power source, follow these steps:

1. Preparing for Installation, page 3-4

2. Grounding the Switch, page 3-5

3. Installing the DC Power Supply in the Switch, page 3-7

4. Wiring the DC-Input Power Source, page 3-9

Chapter 3 Connecting the Power Supply

Warning

Note We recommend that you use 18 AWG copper wiring for Network Equipment Building Systems (NEBS)

Before performing any of the following procedures, ensure that power is removed from the DC circuit.

Statement 1003

This product relies on the building’s installation for short-circuit (overcurrent) protection. Ensure that the protective device is rated not greater than: 15 A, 80 Vdc

Statement 1005

installation. This guideline follows the standard guidelines for DC power wiring in the Central Office.

Preparing for Installation

Locate the terminal block plug that ships with the DC power supply.

Obtain these necessary tools and equipment:

• Ratcheting torque screwdriver with a Phillips head that exerts up to 15 pound-force inches (lbf-in.)

of pressure

• Panduit crimping tool with optional controlled cycle mechanism (model CT-700, CT-720, CT-920,

CT-920CH, CT-930, or CT-940CH)

• 6-gauge copper ground wire (insulated or noninsulated)

• Four leads of 18-gauge copper wire. The DC terminal block also accepts 12-28 AWG copper wire

(see Figure 3-11 on page 3-9).

3-4

Note We recommend that you use 18 AWG copper wiring for Network Equipment Building Systems

(NEBS) installations. This guideline follows the standard guidelines for DC power wiring in the Central Office.

• Wire-stripping tools for stripping 6- and 18-gauge wires

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Chapter 3 Connecting the Power Supply

Insulation

Wire lead

0.5 in. (12.7 mm) ± 0.02 in. (0.5 mm)

60528

Grounding the Switch

Connecting to DC Power

Warning

Caution To make sure that the equipment is reliably connected to earth ground, follow the grounding

When installing or replacing the unit, the ground connection must always be made first and disconnected last.

procedure instructions, and use a UL-listed lug suitable for number-6 AWG wire and two number-10-32 ground-lug screws.

Preparing the Ground Wire

Before you ground the switch to earth ground, you must prepare the ground wire. Follow these steps. Make sure to follow any grounding requirements at your site.

Step 1 Locate the ground lug and the two number-10-32 screws on the rear panel of the switch.

Use a standard Phillips screwdriver or a ratcheting torque screwdriver with a Phillips head to remove the ground lug. Set the screws and the ground lug aside.

Statement 1024

Statement 1046

Step 2 If your ground wire is insulated, use a wire stripping tool to strip the 6-gauge ground wire to 0.5 inch

(12.7 millimeter [mm]) ± 0.02 inch (0.5 mm) as shown in Figure 3-4.

Figure 3-4 Stripping the Ground Wire

Step 3

Step 4 Using a Panduit crimping tool, crimp the ground lug to the 6-gauge wire (see Figure 3-5).

Slide the open end of the ground lug over the exposed area of the 6-gauge wire.

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Connecting to DC Power

STAC

K 1

STAC

K 1

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Chapter 3 Connecting the Power Supply

Figure 3-5 Crimping the Ground Lug

Step 5

Use the two number-10-32 screws to attach the ground lug and wire assembly to the rear panel of the switch.

Step 6 Using a ratcheting torque screwdriver, torque each grounding-lug screw to 15 lbf-in. (240 ounce-force

inches [ozf-in.]). Figure 3-6 shows how to torque the grounding-lug screws on a switch.

Figure 3-6 Torquing Ground-Lug Screws

1 Grounding-lug screws

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STACK 1

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Connecting the Grounding Wire to Earth Ground

Next you must connect the other end of the grounding wire to an appropriate grounding point at your site or to the telco rack (see Figure 3-7).

Figure 3-7 Connecting the Grounding Wire to the Rack

Connecting to DC Power

1 Tel c o R a c k 2 Grounding wire

Complete these steps:

Step 1 Remove all paint or oxidation from the rack at the point of the grounding connection.

Step 2 Use a 3/16-inch flat-head screwdriver to loosen the grounding screw on the rack.

Step 3 Connect the wire to a ring lug (large enough for the rack screw to fit through).

Step 4 Use a 3/16-inch flat-head screwdriver and the screw to attach the ring lug to the rack.

Step 5 Tighten the grounding screw on the rack over the ring lug.

Repeat these steps for each switch being installed.

Installing the DC Power Supply in the Switch

Figure 3-8 shows the location of the DC power supply parts.

Figure 3-8 DC Power Supply

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1 Power-on restrictor 2 DC-power connector

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Connecting to DC Power

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STACK 1

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Step 1 Insert the power supply partially into the power slot (see Figure 3-9).

Chapter 3 Connecting the Power Supply

To insert an DC power supply into power supply slot A or B, follow these steps:

Figure 3-9 Inserting the DC Power Supply

Step 2

Slide the power-on restrictor to the left, toward the power connector (see Figure 3-10).

Note The power supply unit will not slide completely into the power slot if the terminal block is

already inserted into the terminal block plug.

Figure 3-10 DC Power-On Restrictor

1 Power-on restrictor

Step 3

Step 4 Slide the power-on restrictor to the right to access the power connector (see Figure 3-10).

Step 5 Use a Phillips screwdriver to attach the screw at the lower-left and secure the power supply unit in the

Slide the power supply unit the rest of the way into the power slot.

switch chassis.

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Chapter 3 Connecting the Power Supply

60530

Wiring the DC-Input Power Source

Connecting to DC Power

Warning

Caution You must connect the switch only to a DC-input power source that has an input supply voltage from –36

A readily accessible two-poled disconnect device must be incorporated in the fixed wiring.

Statement 1022

Only trained and qualified personnel should be allowed to install, replace, or service this equipment.

Statement 1030

Installation of the equipment must comply with local and national electrical codes.

Statement 1074

to –72 VDC. If the supply voltage is not in this range, the switch might not operate properly or might be damaged.

To wire the switch to a DC-input power source, follow these steps:

Step 1 Locate the terminal block plug (see Figure 3-11).

Figure 3-11 Terminal Block Plug

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Step 2

Identify the positive and negative feed positions for the terminal block connection. The wiring sequence is positive to positive and negative to negative for both the A and the B feed wires.

The rear panel of the power supply unit identifies the positive and negative positions for both the A and B feed wires. Figure 3-12 shows the positions on the power supply.

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Connecting to DC Power

97466

0.25 in. (6.3 mm) ± 0.02 in. (0.5 mm)

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Chapter 3 Connecting the Power Supply

Figure 3-12 Positive and Negative Positions

Step 3

Step 4

Using an 18-gauge wire-stripping tool, strip each of the four wires coming from the DC-input power source to 0.27 inch (6.6 mm) ± 0.02 inch (0.5 mm). Do not strip more than 0.29 inch (7.4 mm) of insulation from the wire. Stripping more than the recommended amount of wire can leave exposed wire from the terminal block plug after installation. (See Figure 3-13.)

Figure 3-13 Stripping the DC-Input Power Source Wire

Insert the exposed wire of one of the four DC-input power source wires into the terminal block plug, as shown in Figure 3-14. Make sure that you cannot see any wire lead. Only wire with insulation should extend from the terminal block.

Figure 3-14 Inserting Wires in the Terminal Block Plug

1 Negative 3 Negative

2 Return 4 Return

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Chapter 3 Connecting the Power Supply

60533

Torque to 4.5 lbf-in. (72 ozf-in.)

97482

Step 5 Use a ratcheting torque screwdriver to torque the terminal block captive screw (above the installed wire

lead) to 4.5 lbf-in. (72 ozf-in.). (See Figure 3-15.)

Caution Do not overtorque the terminal-block captive screws. The recommended maximum torque is 4.5 lbf-in.

Figure 3-15 Torquing the Terminal-Block Captive Screws

Connecting to DC Power

Step 6

Repeat Steps 4 and 5 for the remaining three DC-input power source wires. Figure 3-16 shows the completed wiring of a terminal block plug.

Figure 3-16 Completed Wiring of Terminal Block Plug

1 Feed A Negative 3 Feed B Negative

2 Feed A Return 4 Feed B Return

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Removing the DC Power Supply

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Step 7 Insert the terminal block plug in the terminal block header of the power supply (see Figure 3-17).

Figure 3-17 Inserting the Terminal Block Plug

Caution Secure the wires coming in from the terminal block so that they cannot be disturbed by casual contact.

For example, use tie wraps to secure the wires to the rack.

Chapter 3 Connecting the Power Supply

Step 8 Remove the tape from the circuit-breaker switch handle, and move the circuit-breaker handle to the on

position.

Removing the DC Power Supply

To remove a power supply from power supply slot A or B, follow these steps:

Step 1 Move the circuit-breaker to the off position.

Step 2 Detach the terminal block plug from the terminal block header of the power supply.

Step 3 Slide the power-on restrictor towards the left (see Figure 3-18).

Figure 3-18 DC Power-On Restrictor

3-12

1 Power-on restrictor

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Chapter 3 Connecting the Power Supply

Connecting to Both AC and DC Power in the Switch

Step 4 Use a Phillips screwdriver to remove the screw at the lower-left that secures the power supply unit to

the switch chassis.

Step 5 Remove the power supply unit from the power slot by pulling on the power-on restrictor (see

Figure 3-18).

Connecting to Both AC and DC Power in the Switch

You can install an AC power supply or a DC power supply in either slot. You can also install an AC power supply in one slot and a DC power supply in the other slot.

Caution If a DC power supply is present in your configuration, you must install a grounding lug on the switch.

See the section that applies to your configuration:

• To install an AC power supply in one of the slots, see the “Connecting to AC Power” section on

page 3-1.

• To install a DC power supply in either slot, see the “Connecting to DC Power” section on page 3-4.

Warning

• To remove an AC power supply, see the “Removing the AC Power Supply” section on page 3-3.

• To remove a DC power supply, see the “Removing the DC Power Supply” section on page 3-12.

This unit might have more than one power supply connection. All connections must be removed to de-energize the unit.

Statement 1028

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Connecting to Both AC and DC Power in the Switch

Chapter 3 Connecting the Power Supply

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CHAP T ER

Troubleshooting

The LEDs on the front panel provide troubleshooting information about the switch. They show failures in the power-on self-test (POST), port-connectivity problems, and overall switch performance. For a full description of the switch LEDs, see the “LEDs” section on page 1-4.

You can also get statistics from the browser interface, from the command-line interface (CLI), or from a Simple Network Management Protocol (SNMP) workstation. See the software configuration guide, the switch command reference guide on Cisco.com, or the documentation that came with your SNMP application for details.

This chapter describes these topics for troubleshooting problems:

• Diagnosing Problems, page 4-1

• Clearing the Switch IP Address and Configuration, page 4-5

• Finding the Switch Serial Number, page 4-6

Diagnosing Problems

The LEDs on the front panel provide troubleshooting information about the switch. They show POST failures, port-connectivity problems, and overall switch performance. You can also get statistics from the CLI or from an SNMP workstation. See the software configuration guide and the switch command reference on Cisco.com or the documentation that came with your SNMP application for more information.

This section includes these troubleshooting topics:

• “Verify Switch POST Results” section on page 4-2

• “Monitor Switch LEDs” section on page 4-2

• “Verify Switch Connections” section on page 4-2

• “Monitor Switch Performance” section on page 4-4

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Diagnosing Problems

Verify Switch POST Results

As the switch powers on, it begins the POST, a series of tests that runs automatically to ensure that the switch functions properly. It might take several minutes for the switch to complete POST.

When the switch begins POST, the system LED slowly blinks green. When POST completes, the system LED blinks amber. If POST fails, the system LED remains amber. If POST completes successfully, the system LED rapidly blinks green.

Note POST failures are usually fatal. Contact your Cisco technical support representative if your switch does

not pass POST.

Monitor Switch LEDs

You must have physical access to the switch to do this. Look at the port LEDs for troubleshooting information about the switch. See the “LEDs” section on page 1-4 for a description of the LED colors and their meanings.

Chapter 4 Troubleshooting

Verify Switch Connections

Review these sections when troubleshooting switch connectivity problems:

• Bad or Damaged Cable, page 4-2

• Ethernet and Fiber Cables, page 4-3

• Link Status, page 4-3

• Transceiver Module Port Issues, page 4-3

• Port and Interface Settings, page 4-3

• Ping the End Device, page 4-4

• Spanning Tree Loops, page 4-4

Bad or Damaged Cable

Always look at the cable for marginal damage or failure. A cable might connect at the physical layer but then cause packet corruption because of subtle damage to its wiring or connectors. You can identify this situation because the port will have many packet errors, or the port constantly loses and regains link. In these situations:

• Change the copper or fiber-optic cable with a known, good cable if necessary.

• Look for broken or missing pins on cable connectors.

• Rule out any insufficient patch panel connections or media convertors between the source and the

destination. If possible, bypass the patch panel or eliminate faulty media convertors, such as fiber-optic-to-copper convertors.

• Try using the cable in another port or interface to see if the problem also exists there.

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Chapter 4 Troubleshooting

Ethernet and Fiber Cables

Make sure that you have the correct cable type for the connection:

• For Ethernet, use Category 3 copper cable for 10 Mb/s unshielded twisted pair (UTP) connections.

Use either Category 5, Category 5e, or Category 6 UTP for 10/100 or 10/100/1000 Mb/s connections.

• For fiber-optic connectors, verify that you have the correct cable for the distance and port type.

Make sure that the ports on the connected device match and that they use the same type of encoding, optical frequency, and fiber type. For more information about cabling, see Appendix B, “Connector

and Cable Specifications.”

• For copper connections, determine if a crossover cable was used when a straight-through cable was

required or the reverse. Enable auto-MDIX on the switch, or replace the cable.

Link Status

Verify that both sides have link. A single broken wire or one shutdown port can cause one side to show link, but the other side does not have link.

A link LED does not guarantee that the cable is fully functional. The cable might have encountered physical stress that causes it to function at a marginal level. If the link light for the port does not come on:

• Connect the cable from the switch to a known, good device.

Diagnosing Problems

• Make sure that both ends of the cable are connected to the correct ports.

• Verify that both devices have power.

• Verify that you are using the correct cable type. See Appendix B, “Connector and Cable

Specifications.” for more information.

• Look for loose connections. Sometimes a cable appears to be seated, but is not. Disconnect and then

reconnect the cable.

Transceiver Module Port Issues

Use only Cisco SFP modules on the switch. Each Cisco module has an internal serial EEPROM that is encoded with security information. This encoding provides a way for Cisco to identify and validate that the module meets the requirements for the switch. Check these items:

• Bad or incorrect SFP module. Exchange the suspect module with a known, good module. Verify that

this module supports this platform. See the “Features” section on page 1-1 for a list of supported SFP modules.

• Use the show interfaces privileged EXEC command to check the port or module error-disabled,

disabled, or shutdown status. Re-enable the port if necessary.

• Make sure that all you have properly cleaned and securely connected all fiber-optic connections.

Port and Interface Settings

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An obvious but sometimes overlooked cause of port connectivity failure is a disabled port. Verify that the port or interface is not disabled or for some reason powered off. If a port or interface is manually shut down on one or the other side of the link, the link does not come up until you re-enable the port.

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Diagnosing Problems

Use the show interfaces privileged EXEC command to verify the port or interface error-disabled, disabled, or shutdown status on both sides of the connection. If necessary, re-enable the port or the interface.

Ping the End Device

Verify the end device connection by first pinging it from the directly connected switch, and then work your way back port by port, interface by interface, trunk by trunk, until you find the source of the connectivity issue. Make sure that each switch can identify the end device MAC address in its Content-Addressable Memory (CAM) table.

Spanning Tree Loops

Spanning Tree Protocol (STP) loops can cause serious performance issues that might appear to be port or interface problems. In this situation, the switch bandwidth is used repeatedly by the same frames, crowding out legitimate traffic.

A unidirectional link can cause loops. This occurs when the traffic that the switch sends is received by its neighbor, but the switch does not receive the traffic that is sent from the neighbor. A broken fiber-optic cable, other cabling, or a port issue could cause this one-way communication.

You can enable the UniDirectional Link Detection (UDLD) protocol on the switch to help identify difficult-to-find unidirectional link problems. UDLD supports a normal mode of operation (the default) and an aggressive mode. In normal mode, UDLD detects unidirectional links because of incorrectly connected interfaces on fiber-optic connections. In aggressive mode, UDLD also detects unidirectional links caused by one-way traffic on fiber-optic and twisted-pair links and by incorrectly connected interfaces on fiber-optic links. For information about enabling UDLD on the switch, see the “Understanding UDLD” section in the software configuration guide.

Chapter 4 Troubleshooting

Monitor Switch Performance

Review these sections when you troubleshoot switch performance problems:

• Speed, Duplex, and Autonegotiation, page 4-4

• Autonegotiation and NIC Cards, page 4-5

• Cabling Distance, page 4-5

Speed, Duplex, and Autonegotiation

If the port statistics show a large number of alignment errors, frame check sequence (FCS), or late-collisions errors, a speed or duplex mismatch might be the problem.

A common issue with speed and duplex occurs when the duplex settings are mismatched between two switches, between a switch and a router, or between the switch and a workstation or server. This can happen when you manually set the speed and duplex or because of autonegotiation issues between the two devices.

These circumstances can result in a mismatch:

• A manually set speed or duplex parameter is different from the manually set speed or duplex

parameter on the connected port.

• A port is set to autonegotiate, and the connected port is set to full duplex with no autonegotiation.

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Chapter 4 Troubleshooting

To maximize switch performance and to ensure a link, follow one of these guidelines when you set or change the settings for duplex and speed:

• Let both ports autonegotiate both speed and duplex.

• Manually set the speed and duplex parameters for the ports on both ends of the connection.

• If a remote device does not autonegotiate, configure the duplex settings on the two ports to match.

The speed parameter can adjust itself even if the connected port does not autonegotiate.

Autonegotiation and NIC Cards

Problems sometimes occur between the switch and third-party network interface cards (NICs). By default, the switch ports and interfaces are set to autonegotiate. It is common for devices such as laptop computers or other devices to also be set to autonegotiate, yet sometimes autonegotation issues occur.

To troubleshoot autonegotiation problems, try to manually set both sides of the connection. If this does not solve the problem, the firmware or software on your NIC card might be causing the problem. Upgrade the NIC card driver to the latest version available from the manufacturer.

Cabling Distance

Clearing the Switch IP Address and Configuration

If the port statistics show excessive FCS, late-collision, or alignment errors, verify that the cable distance from the switch to the connected device meets the recommended guidelines. See the “Cable and Adapter

Specifications” section on page B-5 for cabling guidelines.

Clearing the Switch IP Address and Configuration

If you have configured a new switch with an incorrect IP address, you can clear the IP address that is configured on the switch.

Caution This procedure clears the IP address and all configuration information that is stored on the switch. Do

not follow this procedure unless you want to completely reconfigure the switch.

Follow these steps to return your switch to the factory default settings:

1. Press and hold the Mode button.

The switch LEDs begin blinking after about 2 seconds. If the switch is not configured, the LEDs above the mode button turn green. You can omit this step and run Express Setup to configure the switch.

2. Continue holding down the Mode button. The LEDs stop blinking after an additional 8 seconds, and

then the switch reboots.

The switch now behaves like an unconfigured switch. You can configure the switch by using Express Setup as described in the switch getting started guide that is included with the switch.

You can also configure the switch by using the CLI setup procedure described in Appendix C,

“Configuring the Switch with the CLI-Based Setup Program.”

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Finding the Switch Serial Number

116114

STACK 1

SN: AAANNNNXXXX

Finding the Switch Serial Number

If you contact Cisco Technical Assistance, you need to know the serial number of your switch. Use these figures to locate the serial number on your switch. You can also use the show version command to get the serial number.

Figure 4-1 Catalyst 3750 Metro Switch Serial Number Location

Chapter 4 Troubleshooting

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APPENDIX

Technical Specifications

This appendix lists the switch technical specifications in Tab l e A - 1 and the regulatory agency approvals in Table A-2.

Table A-1 Specifications for Catalyst 3750 Metro Switch

Environmental Ranges

Operating temperature 32 to 113°F (0 to 45°C)

Storage temperature –13 to 158°F (–25 to 70°C)

Relative humidity 10 to 85% (noncondensing)

Operating altitude Up to 10,000 ft (3049 m)

Storage altitude Up to 15,000 ft (4573 m)

AC Power Requirements

AC input voltage 100 to 240 VAC (autoranging)

1.2 A/0.7 A, 50 to 60 Hz

Power consumption 110W, 374 Btus per hour

Power rating 0.110 kVA

DC Power Requirements

DC input voltage 36 to –72 V, 3 to 1.5A

Power consumption 110W (maximum), 374 Btus per hour

Physical Dimensions

Weight Switch with one AC power supply: 12.1 lb (5.5 kg)

Switch with two AC power supplies: 14 lb (6.35 kg)

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Switch with one DC power supply: 12 lb (5.44 kg) Switch with two DC power supplies: 13.8 lb (6.26 kg)

Dimensions (H x D x W) 1.75 x 14 x 17.5 in. (4.44 x 35.6 x 44.45 cm)

Table A-2 Catalyst 3750 Metro Switch Agency Approvals

Safety EMC

UL to UL 60950, Third Edition FCC Part 15 Class A

c-UL to CAN/CSA -C22.2 No. 60950-00, Third Edition EN 55022 1998 Class A (CISPR 22)

Catalyst 3750 Metro Switch Hardware Installation Guide

A-1

Appendix A Technical Specifications

Table A-2 Catalyst 3750 Metro Switch Agency Approvals (continued)

Safety EMC

EN 55024 1998 Class A (CISPR 24)

TUV/GS to EN 60950:2000 VCCI Class A

CB to IEC 60950 with all country deviations AS/NZS 3548 Class A

NOM to NOM-019-SCFI CNS13438 Class A

CE Marking CE

MIC

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Connector and Cable Specifications

This appendix describes the Catalyst 3750 Metro switch ports and the cables and adapters that you use to connect the switch to other devices, and includes these sections:

• Connector Specifications, page B-1

• Cable and Adapter Specifications, page B-5

Connector Specifications

These sections describe the connectors used with the switch, and includes these sections:

• 10/100 Ports, page B-1

• SFP Module Ports, page B-4

• Console Port, page B-4

APPENDIX

10/100 Ports

The 10/100 Ethernet ports use standard RJ-45 connectors and Ethernet pinouts with internal crossovers, as shown by an X in the port name. These ports have the transmit (TD) and receive (RD) signals internally crossed so that a twisted-pair straight-through cable and adapter can be attached to the port.

Figure B-1 on page B-2 shows the pinouts.

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B-1

Connector Specifications

Appendix B Connector and Cable Specifications

Figure B-1 10/100 Port Pinouts

The automatic crossover feature is disabled by default. For configuration information for this feature, refer to the switch software configuration guide or the switch command reference.

Connecting to 10BASE-T- and 100BASE-TX-Compatible Devices

When you connect the ports to 10BASE-T- and 100BASE-TX-compatible devices, such as servers, workstations, and routers, you can use a two or four twisted-pair, straight-through cable wired for 10BASE-T and 100BASE-TX. Figure B-5 on page B-6 shows the two twisted-pair, straight-through cable schematics. Figure B-7 on page B-7 shows the four twisted-pair, straight-through cable schematics.

When you connect the ports to 10BASE-T- and 100BASE-TX-compatible devices, such as switches or repeaters, you can use a two or four twisted-pair, crossover cable. Figure B-6 on page B-6 shows the two twisted-pair, crossover cable schematics. Figure B-8 on page B-7 shows the four twisted-pair, crossover cable schematics.

You can use Category 3, 4, or 5 cabling when connecting to 10BASE-T-compatible devices. You must use Category 5 cabling when connecting to 100BASE-TX-compatible devices.

100BASE-FX Ports

The 100BASE-FX ports use MT-RJ connectors, as shown in Figure B-2. The 100BASE-FX ports use 50/125- or 62.5/125-micron multimode fiber-optic cabling.

You can connect a 100BASE-FX port to an SC or ST port on a target device by using one of the MT-RJ fiber-optic patch cables listed in Tabl e B-1. Use the Cisco part numbers in Ta ble B- 1 to order the patch cables that you need.

B-2

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Appendix B Connector and Cable Specifications

Figure B-2 MT-RJ Connector

Table B-1 MT-RJ Patch Cables for 100BASE-FX Connections

Type Cisco Part Number

1-meter, MT-RJ-to-SC multimode cable CAB-MTRJ-SC-MM-1M

3-meter, MT-RJ-to-SC multimode cable CAB-MTRJ-SC-MM-3M

5-meter, MT-RJ-to-SC multimode cable CAB-MTRJ-SC-MM-5M

1-meter, MT-RJ-to-ST multimode cable CAB-MTRJ-ST-MM-1M

3-meter, MT-RJ-to-ST multimode cable CAB-MTRJ-ST-MM-3M

5-meter, MT-RJ-to-ST multimode cable CAB-MTRJ-ST-MM-5M

Connector Specifications

Connecting to 1000BASE-T Devices

When you connect the ports to 1000BASE-T devices, such as servers, workstations, and routers, you must use a four twisted-pair, Category 5 or higher, straight-through cable wired for 10BASE-T, 100BASE-TX, and 1000BASE-T. Figure B-10 on page B-8 shows the straight-through cable schematics.

When you connect the ports to other devices, such as switches or repeaters, you must use a four twisted-pair, Category 5, crossover cable. Figure B-11 on page B-9 shows the crossover cable schematics.

• Be sure to use a four twisted-pair, Category 5 or higher cable when you connect to a

1000BASE-T-compatible device.

• Use a straight-through cable to connect two ports only when one port is designated with an X. Use

a crossover cable to connect two ports when both ports are designated with an X or when both ports do not have an X.

• You can use Category 3, 4, or 5 cabling when connecting to 10BASE-T-compatible devices. You

must use Category 5 or higher cabling when you connect to 100BASE-TX-compatible devices.

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Catalyst 3750 Metro Switch Hardware Installation Guide

B-3

Connector Specifications

58476

SFP Module Ports

The Catalyst 3750 Metro switch uses SFP modules for fiber-optic and copper uplink ports. The fiber-optic LC connector is shown in Figure B-3. The pin configuration for copper SFP module RJ-45 connectors are shown in Figure B-4.

See the “Features” section on page 1-1 for a list of the SFP modules that the Catalyst 3750 Metro switch supports.

Figure B-3 Fiber-Optic LC Connector

Appendix B Connector and Cable Specifications

Warning

Console Port

Invisible laser radiation may be emitted from disconnected fibers or connectors. Do not stare into beams or view directly with optical instruments.

Figure B-4 Copper SFP Module RJ-45 Connector

The console port uses an 8-pin RJ-45 connector, which is described in Table B-3 on page B-9 and

Table B-4 on page B-10. The supplied RJ-45-to-DB-9 adapter cable is used to connect the console port

of the switch to a console PC. You need to provide a RJ-45-to-DB-25 female DTE adapter if you want to connect the switch console port to a terminal. You can order a kit (part number ACS-DSBUASYN=) containing that adapter from Cisco. For console port and adapter pinout information, see Table B-3 on

page B-9 and Table B-4 on page B-10.

B-4

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Appendix B Connector and Cable Specifications

Cable and Adapter Specifications

These sections describe the cables and adapters used with the Catalyst 3750 Metro switch:

• SFP Module Cable Specifications, page B-5

• Two Twisted-Pair Cable Pinouts, page B-6

• Four Twisted-Pair Cable Pinouts for 10/100 Ports, page B-7

• Identifying a Crossover Cable, page B-8

• Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports, page B-8

• Adapter Pinouts, page B-9

SFP Module Cable Specifications

Table B-2 lists the cable specifications for the fiber-optic SFP module connections. Each port must

match the wave-length specifications on the other end of the cable, and for reliable communications, the cable must not exceed the required cable length. Copper 1000BASE-T SFP transceivers use standard four twisted-pair, Category 5 or greater cable at lengths up to 328 feet (100 meters).

Cable and Adapter Specifications

Table B-2 Fiber-Optic SFP Module Port Cabling Specifications

SFP Module

100BASE-BX (GLC-FE-100BX-D

Wavelength (nanometers) Fiber Type

1310 TX

SMF G.652

1550 RX

Core Size/Cladding Size (micron)

GLC-FE-100BX-U)

100BASE-FX (GLC-GE-100FX)

100BASE-FX (GLC-FE-100FX)

100BASE-LX

1310 MMF 50/125

62.5/125

1310 MMF 50/125

62.5/125

1310 SMF G.652

(100BASE-LX10)

1000BASE-BX10-D (GLC-BX-D)

1000BASE-BX10-U (GLC-BX-U)

1000BASE-SX (GLC-SX-MM)

1490 TX

SMF G.652

1310 RX

1310 TX

SMF G.652

1490 RX

850 MMF 62.5/125

62.5/125 50/125 50/125

1000BASE-LX/LH (GLC-LH-SM)

1310 MMF

62.5/125 50/125 50/125

SMF

G.652

Modal Bandwidth (MHz/km)

Cable Distance

— 32,810 feet (10 km)

500 500

6,562 feet (2 km) 6,562 feet (2 km)

— 32,810 feet (10 km)

160 200 400 500

500 400 500 —

722 feet (220 m) 902 feet (275 m) 1640 feet (500 m) 1804 feet (550 m)

1804 feet (550 m) 1804 feet (550 m) 1804 feet (550 m) 32,810 feet (10 km)

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Catalyst 3750 Metro Switch Hardware Installation Guide

B-5

Cable and Adapter Specifications

Switch

3 TD+

6 TD–

1 RD+

2 RD–

Switch

3 TD+ 6 TD–

1 RD+ 2 RD–

H5579

Table B-2 Fiber-Optic SFP Module Port Cabling Specifications (continued)

Appendix B Connector and Cable Specifications

Wavelength

SFP Module

1000BASE-ZX

(nanometers) Fiber Type

1550 SMF G.652

(GLC-ZX-SM

CWDM 1470, 1490,

SMF G.652

Core Size/Cladding Size (micron)

Modal Bandwidth (MHz/km)

Cable Distance

— 43.4 to 62 miles

(70 to 100 km)

— 62 miles (100 km) 1510, 1530, 1550, 1570, 1590, 1610

1. Modal bandwidth applies only to multimode fiber.

2. A mode-field diameter/cladding diameter = 9 micrometers/125 micrometers

3. A mode-conditioning patch cord is required. Using an ordinary patch cord with MMF, 1000BASE-LX/LH SFP modules, and a short link distance can cause transceiver saturation, resulting in an elevated bit error rate (BER). When using the LX/LH SFP module with 62.5-micron diameter MMF, you must also install a mode-conditioning patch cord between the SFP module and the MMF cable on both the sending and receiving ends of the link. The mode-conditioning patch cord is required for link distances greater than 984 feet (300 m).

4. 1000BASE-ZX SFP modules can send data up to 62 miles (100 km) by using dispersion-shifted SMF or low-attenuation SMF; the distance depends on the fiber quality, the number of splices, and the connectors.

Two Twisted-Pair Cable Pinouts

Figure B-5 and Figure B-6 show the schematics of two twisted-pair cables for 10/100 ports.

Figure B-5 Two Twisted-Pair Straight-Through Cable Schematic

B-6

Figure B-6 Two Twisted-Pair Crossover Cable Schematic

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Appendix B Connector and Cable Specifications

1 TPO+

2 TPO-

3 TP1+

6 TP1-

1 TP1+

Switch Router or PC

2 TP1-

3 TPO+

6 TPO-

4 TP2+

5 TP2-

7 TP3+

8 TP3-

4 TP3+

5 TP3-

7 TP2+

8 TP2-

65272

Four Twisted-Pair Cable Pinouts for 10/100 Ports

Figure B-7 and Figure B-8 show the schematics of four twisted-pair cables for 10/100 ports.

Figure B-7 Four Twisted-Pair Straight-Through Cable Schematic for 10/100 Ports

Cable and Adapter Specifications

Figure B-8 Four Twisted-Pair Crossover Cable Schematic for 10/100 Ports

Switch Switch

1 TP0+

2 TP0-

3 TP1+

6 TP1-

4 TP2+

5 TP2-

7 TP3+

8 TP3-

1 TP0+

2 TP0-

3 TP1+

6 TP1-

4 TP2+

5 TP2-

7 TP3+

8 TP3-

65274

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Catalyst 3750 Metro Switch Hardware Installation Guide

B-7

Cable and Adapter Specifications

1 TPO+

2 TPO-

3 TP1+

6 TP1-

1 TP1+

Switch Router or PC

2 TP1-

3 TPO+

6 TPO-

4 TP2+

5 TP2-

7 TP3+

8 TP3-

4 TP3+

5 TP3-

7 TP2+

8 TP2-

65272

Identifying a Crossover Cable

To identify a crossover cable, compare the two modular ends of the cable. Hold the cable ends side-by-side, with the tab at the back. The wire connected to the pin on the outside of the left plug should be the same color as the wire connected to the pin on the outside of the right plug. (See Figure B-9.)

Figure B-9 Identifying a Crossover Cable

Appendix B Connector and Cable Specifications

Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports

Figure B-10 and Figure B-11 show the schematics of four twisted-pair cables for 10/100/1000 ports on

a Cisco Metro Catalyst 3750 switch.

Figure B-10 Four Twisted-Pair Straight-Through Cable Schematic for 10/100/1000 Ports

B-8

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Appendix B Connector and Cable Specifications

Figure B-11 Four Twisted-Pair Crossover Cable Schematics for 10/100/1000 Ports

Switch Switch

Cable and Adapter Specifications

1 TP0+

2 TP0-

3 TP1+

6 TP1-

4 TP2+

5 TP2-

7 TP3+

8 TP3-

Adapter Pinouts

Table B-3 lists the pinouts for the console port, the RJ-45-to-DB-9 adapter cable, and the console device.

Table B-3 Console Port Signaling Using a DB-9 Adapter

Switch Console Port (DTE)

Signal DB-9 Pin Signal

RTS 8 CT S

DTR 6 DSR

TxD 2 RxD

GND 5 GND

RxD 3 TxD

DSR 4 DTR

CTS 7 RTS

1 TP0+

2 TP0-

3 TP1+

6 TP1-

4 TP2+

5 TP2-

7 TP3+

8 TP3-

RJ-45-to-DB-9 Terminal Adapter

65274

Console Device

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Table B-4 lists the pinouts for the console port, RJ-45-to-DB-25 female DTE adapter, and the console

device.

Note The RJ-45-to-DB-25 female DTE adapter is not supplied with the switch. You can order a kit (part number

ACS-DSBUASYN=) containing this adapter from Cisco.

Catalyst 3750 Metro Switch Hardware Installation Guide

B-9

Cable and Adapter Specifications

Table B-4 Console Port Signaling Using a DB-25 Adapter

Switch Console Port (DTE)

Signal DB-25 Pin Signal

RTS 5 CT S

DTR 6 DSR

TxD 3 RxD

GND 7 GND

RxD 2 TxD

DSR 20 DTR

CTS 4 RTS

RJ-45-to-DB-25 Terminal Adapter

Appendix B Connector and Cable Specifications

Console Device

B-10

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APPENDIX

Configuring the Switch with the CLI-Based Setup Program

This chapter provides a quick step-by-step installation and setup procedure for a switch.

Note For detailed installation procedures on rack mounting your switch or connecting to the small form-factor

pluggable (SFP) modules, see Chapter 2, “Switch Installation.” For product overview information, see

Chapter 1, “Product Overview.”

These steps describe how to do a simple installation:

1. Taking Out What You Need, page C-2

2. Connecting to the Console Port, page C-3

3. Starting the Terminal-Emulation Software, page C-3

4. Connecting to a Power Source, page C-4

5. Entering the Initial Configuration Information, page C-4

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6. Connecting to an Ethernet Port, page C-7

Catalyst 3750 Metro Switch Hardware Installation Guide

C-1

Taking Out What You Need

1 0

1 1

1 2

1 3

1 4

1 6

1 9

2 0

2 1

2 2

2 3

2 4

97448

1 4

R A

YST

R B

STA

EED

M O

D E

1 X

2 X

11 X

1 2 X

3 X

2 3X

2 4 X

CONSOLE

C ataly

st 3

0 M

etro

series

ES PORTS

Taking Out What You Need

Remove the items shown in Figure C-1 from the shipping container:

Figure C-1 The Catalyst 3750 Metro Switch, Adapter Cable, and AC Power Cord

Appendix C Configuring the Switch with the CLI-Based Setup Program

1 Switch 3 AC power cord

2 RJ-45-to-DB-9 adapter cable

Note If you are using a DC power supply, see the “Connecting to DC Power” section on page 3-4 for more

information about setting up your switch with a DC power supply.

Note You need to provide the Category 5 or higher straight-through cables to connect the switch ports to other

Ethernet devices.

Catalyst 3750 Metro Switch Hardware Installation Guide

C-2

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Appendix C Configuring the Switch with the CLI-Based Setup Program

Connecting to the Console Port

You can use the console port to perform the initial configuration. To connect the switch console port to a PC, use the supplied RJ-45-to-DB-9 adapter cable.

Follow these steps to connect the PC or terminal to the switch:

Step 1 Using the supplied RJ-45-to-DB-9 adapter cable, insert the RJ-45 connector into the console port that is

located on the front of the switch, as shown in Figure C-2.

Step 2 Attach the DB-9 female DTE of the adapter cable to a PC serial port, or attach an appropriate adapter to

the terminal.

Figure C-2 Connecting a Switch to a PC

Connecting to the Console Port

1 Switch 2 RJ-45-to-DB-9 adapter cable

Starting the Terminal-Emulation Software

Before you power on the switch, start the terminal-emulation session so that you can see the output display from the power-on self-test (POST).

The terminal-emulation software—frequently a PC application such as Hyperterminal or ProcommPlus—makes communication between the switch and your PC or terminal possible.

Step 1 Start the terminal-emulation program if you are using a PC or terminal.

Step 2 Start a terminal-emulation session.

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C-3

Connecting to a Power Source

Step 3 Configure the baud rate and character format of the PC or terminal to match these console port default

characteristics:

• 9600 baud

• 8 data bits

• 1 stop bit

• No parity

• None (flow control)

Connecting to a Power Source

Follow these steps to connect to a power source:

Step 1 If you are using an AC power supply, connect one end of the supplied AC power cord to the power

connector on the switch rear panel, and then connect the other end of the power cable to a grounded AC outlet. (See Figure C-2.)

Appendix C Configuring the Switch with the CLI-Based Setup Program

Step 2 If you are using a DC power supply, see the “Connecting to DC Power” section on page 3-4 for

instructions on how to install the DC power supply.

As the switch powers on, it begins the POST, a series of tests that runs automatically to ensure that the switch functions properly.

POST lasts approximately 1 minute. After POST is complete, the system and status LEDs remain green. The power and master LEDs might also be green, depending on their functional status (see the “LEDs”

section on page 1-4 for more information).

If the switch fails POST, the system LED turns amber. If the POST fails, see Chapter 4,

“Troubleshooting,” to decide on a course of action.

Note POST failures are usually fatal. Call Cisco Systems if your switch does not pass POST.

If you started the terminal-emulation program before you powered on your switch, the PC or terminal displays the bootloader sequence. You need to press Enter to display the setup program prompt.

Entering the Initial Configuration Information

To set up the switch, you need to complete the setup program, which runs automatically after the switch is powered up. You must assign an IP address and other configuration information necessary for the switch to communicate with the local routers and the Internet.

IP Settings

Catalyst 3750 Metro Switch Hardware Installation Guide

C-4

You will need this information from your network administrator before you complete the setup program:

• Switch IP address

• Subnet mask (IP netmask)

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Appendix C Configuring the Switch with the CLI-Based Setup Program

• Default gateway (router)

• Enable secret password

• Enable password

• Telnet password

Completing the Setup Program

Follow these steps to complete the setup program and to create an initial configuration for the switch:

Step 1 Enter Ye s at these two prompts:

Would you like to enter the initial configuration dialog? [yes/no]: yes

At any point you may enter a question mark '?' for help. Use ctrl-c to abort configuration dialog at any prompt. Default settings are in square brackets '[]'.

Basic management setup configures only enough connectivity for management of the system, extended setup will ask you to configure each interface on the system.

Entering the Initial Configuration Information

Would you like to enter basic management setup? [yes/no]: yes

Step 2 Enter a host name for the switch, and press Return.

The host name is limited to 28 characters. Do not use -n, where n is a number, as the last character in a host name for any switch.

Enter host name [Switch]: host_name

Step 3 Enter an enable secret password, and press Return.

The password can be from 1 to 25 alphanumeric characters, can start with a number, is case sensitive, allows spaces, but ignores leading spaces. The secret password is encrypted and the enable password is in plain text.

Enter enable secret: secret_password

Step 4 Enter an enable password, and press Return.

Enter enable password: enable_password

Step 5 Enter a virtual terminal (Telnet) password, and press Return.

The password can be from 1 to 25 alphanumeric characters, is case sensitive, allows spaces, but ignores leading spaces.

Enter virtual terminal password: terminal-password

Step 6 (Optional) Configure Simple Network Management Protocol (SNMP) by responding to the prompts. You

can also configure SNMP later through the CLI interface. To configure SNMP later, enter no.

Configure SNMP Network Management? [no]: no

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Step 7 Enter the interface name (physical interface or VLAN name) of the interface that connects to the

management network, and press Return. For this release, always use vlan1 as that interface.

Enter interface name used to connect to the management network from the above interface summary: vlan1

Catalyst 3750 Metro Switch Hardware Installation Guide

C-5

Entering the Initial Configuration Information

Step 8 Configure the interface by entering the switch IP address and subnet mask and pressing Return.

The IP address and subnet masks shown below are examples.

Configuring interface vlan1: Configure IP on this interface? [yes]: yes IP address for this interface: 10.4.120.106 Subnet mask for this interface [255.0.0.0]: 255.0.0.0

Step 9 Enter N in this step because you cannot configure this switch as the command switch in a cluster.

Would you like to enable as a cluster command switch? [yes/no]: no

You have now completed the initial configuration of the switch and the switch displays its initial configuration. This is an example of output that appears:

The following configuration command script was created: hostname switch1 enable secret 5 $1$Ulq8$DlA/OiaEbl90WcBPd9cOn1 enable password enable_password line vty 0 15 password terminal-password no snmp-server ! no ip routing

Appendix C Configuring the Switch with the CLI-Based Setup Program

! interface Vlan1 no shutdown ip address 10.4.120.106 255.0.0.0 ! interface FastEthernet1/0/1 ! interface FastEthernet1/0/2

interface FastEthernet1/0/3 ! ...<output abbreviated> ! interface GigabitEthernet1/1/2 ! end

These choices are displayed:

[0] Go to the IOS command prompt without saving this config.

[1] Return back to the setup without saving this config.

[2] Save this configuration to nvram and exit.

If you want to save the configuration and use it the next time the switch reboots, save it in NVRAM by selecting option 2.

Enter your selection [2]:2

C-6

Step 10 Make your selection, and press Return.

Catalyst 3750 Metro Switch Hardware Installation Guide

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Appendix C Configuring the Switch with the CLI-Based Setup Program

M O

D E

1 0

1 1

1 2

1 7

1 8

2 1

2 2

2 4

1 X

2 X

1 1

1 2

3 X

4 X

3 X

4 X

N S

Catalyst 3750 Metro

s e

rie

ES PORTS

P W

S Y

P W

B M A

R S T

T D

X S P

D S T

97426

After you complete the setup program, the switch can run the default configuration that you created. If you want to change this configuration or want to perform other management tasks, use the CLI.

Connecting to an Ethernet Port

Follow these steps to connect to an 10/100 or 10/100/1000 Ethernet port:

Step 1 Connect a Category 5 straight-through cable (not supplied) to a 10/100 port on the front panel of a

switch. See Figure C-3.

Step 2 Connect the other end of the cable to the Ethernet (RJ-45) port of the workstation, PC, server, or router.

Figure C-3 Connecting to a Front Panel Port

Connecting to an Ethernet Port

1 Switch 3 Category 5 straight-through cable

2 PC

For information on connecting to the SFP ports, see the “Connecting to an SFP Module” section on

page 2-18.

Catalyst 3750 Metro Switch Hardware Installation Guide

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C-7

Connecting to an Ethernet Port

Appendix C Configuring the Switch with the CLI-Based Setup Program

C-8

Catalyst 3750 Metro Switch Hardware Installation Guide

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INDEX

Numerics

10/100 ports

connecting to

2-17

connectors and cables B-1 to B-2

described 1-3

pinouts B-2

10/100 ports and 1000BASE-T SFP module ports

cable lengths

2-4

100BASE-FX ports patch cables B-3

19- and 24-inch racks 2-7

AC power

connecting to

3-1

specifications A-1

adapter pinouts, terminal

RJ-45-to-DB-25

B-9

RJ-45-to-DB-9 B-9

agency approvals A-1

altitude, operating and storage A-1

autonegotiation 1-3

autonegotiation troubleshooting 4-4

bodily injury prevention warning 2-2

brackets

See mounting brackets

cable guide, attaching 2-12

cable lengths 2-4

cables

1000BASE-T module

crossover

connecting to

four twisted-pair pinout, 10/100 ports B-7

four twisted-pair pinout 1000BASE-T ports B-9

identifying B-8

two twisted-pair pinout, 10/100 ports B-6

SFP module B-5

straight-through

connecting to

four twisted-pair pinout, 10/100 ports B-7

four twisted-pair pinout, 1000BASE-T ports B-8

two twisted-pair pinout, 10/100 ports B-6

Cisco 3750 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Audience

Preface

Purpose

Organization

Conventions

Related Publications

Obtaining Documentation and Submitting a Service Request

Features

Product Overview

Front Panel Description

Console Port

10/100 and 10/100/1000 Ports

SFP Module Slots

LEDs

System LED

Power LEDs

Master LED

Port LEDs and Modes

Rear Panel Description

Power Connectors

Power Supply Connector

Management Options

Network Configurations

Switch Installation

Preparing for Installation

Warnings

Guidelines for Particulate Matter

Installation Guidelines

Verifying Package Contents

Verifying Switch Operation

Connecting a PC or Terminal to the Console Port

Powering On the Switch and Running POST

Installing the Switch

Powering Off the Switch and Disconnecting the Console Port

Rack-Mounting

Removing Screws from the Switch

Attaching Brackets to the Switch

Mounting the Switch in a Rack

Attaching the Cable Guide

Wall-Mounting

Attaching the Brackets to the Switch for Wall-Mounting

Mounting the Switch on a Wall

Installing and Removing SFP Modules

Table- or Shelf-Mounting

Installing SFP Modules into SFP Module Slots

Removing SFP Modules from SFP Module Slots

Connecting to the 10/100 Ports

Connecting to an SFP Module

Connecting to a Fiber-Optic SFP Module

Connecting to 1000BASE-T SFP Modules

Where to Go Next

Connecting the Power Supply

Connecting to AC Power

Removing the AC Power Supply

Connecting to DC Power

Preparing for Installation

Grounding the Switch

Preparing the Ground Wire

Connecting the Grounding Wire to Earth Ground

Installing the DC Power Supply in the Switch

Wiring the DC-Input Power Source

Removing the DC Power Supply

Connecting to Both AC and DC Power in the Switch

Troubleshooting

Diagnosing Problems

Verify Switch POST Results

Monitor Switch LEDs

Verify Switch Connections

Bad or Damaged Cable

Ethernet and Fiber Cables

Link Status

Transceiver Module Port Issues

Port and Interface Settings

Ping the End Device

Spanning Tree Loops

Monitor Switch Performance