Cisco Catalyst 3750 V2 IP Base Service Manual

Download

Catalyst 3750 Switch Hardware Installation Guide

October 2011

Americas Headquarters

Cisco Systems, Inc. 170 West Tasman Drive San Jose, CA 95134-1706 USA http://www.cisco.com Tel: 408 526-4000

800 553-NETS (6387)

Fax: 408 527-0883

Text Part Number: OL-6336-10

THE SPECIFICATIONS AND INFORMATION REGARDING THE PRODUCTS IN THIS MANUAL ARE SUBJECT TO CHANGE WITHOUT NOTICE. ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS MANUAL ARE BELIEVED TO BE ACCURATE BUT ARE PRESENTED WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED. USERS MUST TAKE FULL RESPONSIBILITY FOR THEIR APPLICATION OF ANY PRODUCTS.

THE SOFTWARE LICENSE AND LIMITED WARRANTY FOR THE ACCOMPANYING PRODUCT ARE SET FORTH IN THE INFORMATION PACKET THAT SHIPPED WITH THE PRODUCT AND ARE INCORPORATED HEREIN BY THIS REFERENCE. IF YOU ARE UNABLE TO LOCATE THE SOFTWARE LICENSE OR LIMITED WARRANTY, CONTACT YOUR CISCO REPRESENTATIVE FOR A COPY.

The following information is for FCC compliance of Class A devices: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio-frequency energy and, if not installed and used in accordance with the instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful interference, in which case users will be required to correct the interference at their own expense.

The following information is for FCC compliance of Class B devices: The equipment described in this manual generates and may radiate radio-frequency energy. If it is not installed in accordance with Cisco’s installation instructions, it may cause interference with radio and television reception. This equipment has been tested and found to comply with the limits for a Class B digital device in accordance with the specifications in part 15 of the FCC rules. These specifications are designed to provide reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation.

Modifying the equipment without Cisco’s written authorization may result in the equipment no longer complying with FCC requirements for Class A or Class B digital devices. In that event, your right to use the equipment may be limited by FCC regulations, and you may be required to correct any interference to radio or television communications at your own expense.

You can determine whether your equipment is causing interference by turning it off. If the interference stops, it was probably caused by the Cisco equipment or one of its peripheral devices. If the equipment causes interference to radio or television reception, try to correct the interference by using one or more of the following measures:

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

• Move the equipment to one side or the other of the television or radio.

• Move the equipment farther away from the television or radio.

• 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.)

Modifications to this product not authorized by Cisco Systems, Inc. could void the FCC approval and negate your authority to operate the product.

The Cisco implementation of TCP header compression is an adaptation of a program developed by the University of California, Berkeley (UCB) as part of UCB’s public domain version of the UNIX operating system. All rights reserved. Copyright © 1981, Regents of the University of California.

NOTWITHSTANDING ANY OTHER WARRANTY HEREIN, ALL DOCUMENT FILES AND SOFTWARE OF THESE SUPPLIERS ARE PROVIDED “AS IS” WITH ALL FAULTS. CISCO AND THE ABOVE-NAMED SUPPLIERS DISCLAIM ALL WARRANTIES, EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, THOSE OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OR ARISING FROM A COURSE OF DEALING, USAGE, OR TRADE PRACTICE.

IN NO EVENT SHALL CISCO OR ITS SUPPLIERS BE LIABLE FOR ANY INDIRECT, SPECIAL, CONSEQUENTIAL, OR INCIDENTAL DAMAGES, INCLUDING, WITHOUT LIMITATION, LOST PROFITS OR LOSS OR DAMAGE TO DATA ARISING OUT OF THE USE OR INABILITY TO USE THIS MANUAL, EVEN IF CISCO OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.

Cisco and the Cisco Logo are trademarks of Cisco Systems, Inc. and/or its affiliates in the U.S. and other countries. A listing of Cisco's trademarks can be found at

www.cisco.com/go/trademarks. Third party trademarks mentioned are the property of their respective owners. The use of the word partner does not imply a partnership

relationship between Cisco and any other company. (1005R)

Any Internet Protocol (IP) addresses used in this document are not intended to be actual addresses. Any examples, command display output, and figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses in illustrative content is unintentional and coincidental.

Catalyst 3750 Switch Hardware Installation Guide

Preface vii Audience vii Purpose vii Conventions vii Related Publications viii Obtaining Documentation, Obtaining Support, and Security Guidelines ix 1 Product Overview 1 Features 1 Front Panel Description 3 Fast Ethernet Switches 3 Catalyst 3750-24FS and 3750V2-24FS Switch Front Panel 3 Catalyst 3750-24TS and 3750V2-24TS Switch Front Panel 4 Catalyst 3750-48TS and 3750V2-48TS Switch Front Panel 5 Catalyst 3750-24PS and 3750V2-24PS Switch Front Panel 5 Catalyst 3750-48PS and 3750V2-48PS Switch Front Panel 6 Gigabit Ethernet Switches 6 Catalyst 3750G-12S and Catalyst 3750G-12S-SD Switch Front Panel 6 Catalyst 3750-24T, 3750G-24TS, and 3750G-24TS-1U Switch Front Panel 6 Catalyst 3750G-48TS Switch Front Panel 8 Catalyst 3750G-24PS Switch Front Panel 8 Catalyst 3750G-48PS Switch Front Panel 9 Catalyst 3750G-16TD Switch Front Panel 9 Catalyst 3750G Integrated Wireless LAN Controller Switch Front Panel 10 10/100 and 10/100/1000 Ports 10 100BASE-FX Ports 12 SFP Module Slots 12 SFP Modules 13 XENPAK Module Slot (Catalyst 3750G-16TD Switch) 13 LEDs 13 System LED 15 RPS LED 16 Master LED 16 Port LEDs and Modes 17 Rear Panel Description 21 StackWise Ports 24 Power Connectors 25 Internal Power Supply Connector 25 DC Power Connector 25 Cisco RPS Connector 25 Console Port 26 Management Options 26 Network Configurations 27

1 Switch Installation 1 Preparing for Installation 1 Warnings 2 Installation Guidelines 6 Box Contents 7 Tools and Equipment 7 Verifying Switch Operation 7 Powering On the Switch and Running POST 7 Powering Off the Switch 8 Planning the Stack 8 Planning Considerations 8 Powering Considerations 8 Cabling Considerations 9 Recommended Cabling Configurations 10 Installing the Switch 11 Rack-Mounting 12 Removing Screws from the Switch 12 Attaching Brackets to the Catalyst 3750G-24TS Switch 14 Attaching Brackets to the Catalyst 3750G Integrated Wireless LAN Controller Switches 17 Attaching Brackets to All Other Catalyst 3750 Switches 18 Mounting the Switch in a Rack 24 Attaching the Cable Guide 26 Wall-Mounting 27 Attaching the Brackets to the Switch for Wall-Mounting 28 Attaching the RPS Connector Cover 28 Mounting the Switch on a Wall 29 Table- or Shelf-Mounting 30 Connecting StackWise Cable to StackWise Ports 30 Installing and Removing SFP Modules 33 Installing SFP Modules into SFP Module Slots 33 Removing SFP Modules from SFP Module Slots 34 Installing and Removing XENPAK Modules (Catalyst 3750G-16TD Switch) 35 Installing a XENPAK Module 36 Removing a XENPAK Module 38 Connecting to the 10/100 and 10/100/1000 Ports 39 Connecting to an SFP Module 41 Connecting to a Fiber-Optic SFP Module 41 Connecting to 1000BASE-T SFP Modules 43 Connecting to a XENPAK Module 44 Where to Go Next 45 1 Troubleshooting 1

Diagnosing Problems 1 Verify Switch POST Results 2 Monitor Switch LEDs 2 Verify Switch Connections 2 Bad or Damaged Cable 2 Ethernet and Fiber Cables 2 Link Status 3 PoE Connections 3 Transceiver Module Port Issues 3 Port and Interface Settings 4 Ping the End Device 4 Spanning Tree Loops 4 Monitor Switch Performance 5 Speed, Duplex, and Autonegotiation 5 Autonegotiation and NIC Cards 5 Cabling Distance 5 Clearing the Switch IP Address and Configuration 6 Replacing a Failed Stack Member 6 Finding the Switch Serial Number 7 1 Technical Specifications 1 1 Connector and Cable Specifications 1 Connector Specifications 1 10/100 and 10/100/1000 Ports 2 100BASE-FX Ports 2 SFP Module Ports 3 XENPAK Module Ports (Catalyst 3750G-16TD Switch) 4 Console Port 4 Cable and Adapter Specifications 5 SFP Module Cable Specifications 5 Two Twisted-Pair Cable Pinouts 6 Four Twisted-Pair Cable Pinouts for 10/100 Ports 7 Identifying a Crossover Cable 8 Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports 8 Crossover Cable and Adapter Pinouts 9 1 Connecting to DC Power 1 Connecting to DC Power 1 Preparing for Installation 1 Grounding the Switch 2 Wiring the DC-Input Power Source 4 1

Configuring the Switch with the CLI-Based Setup Program 1 Accessing the CLI 2 Accessing the CLI Through Express Setup 2 Accessing the CLI Through the Console Port 2 Taking Out What You Need 3 Stacking the Switches (Optional) 4 Connecting to the Console Port 5 Starting the Terminal Emulation Software 6 Connecting to a Power Source 6 Entering the Initial Configuration Information 7 IP Settings 7 Completing the Setup Program 7

Audience

Purpose

Preface

This guide is for the networking or computer technician responsible for installing the Catalyst 3750 switches. We assume that you are familiar with the concepts and terminology of Ethernet and local area networking.

This guide documents the hardware features of the Catalyst 3750 family of switches. It describes the physical and performance characteristics of each switch, explains how to install a switch, 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.

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.

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

vii

Related Publications

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 Switch guide. The EMC regulatory statements are also

included in that guide.

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/ps5023/tsd_products_support_series_home.html

• Catalyst 3750 Switch Getting Started Guide

• Catalyst 3750G Integrated Wireless LAN Controller Getting Started Guide

• Regulatory Compliance and Safety Information for the Catalyst 3750 Switch

• Release Notes for the Catalyst 3750 Switch

• Release Notes for the Catalyst 3750G Integrated Wireless LAN Controller Switch

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

information.

• Catalyst 3750 Switch Software Configuration Guide

• Catalyst 3750 Switch Command Reference

• Catalyst 3750, 3560, 3550, 2970, and 2960 Switch System Message Guide

• Device manager online help (available on the switch)

• Cisco RPS 2300 Redundant Power System Hardware Installation Guide

• Cisco RPS 675 Redundant Power System Hardware Installation Guide

• Getting Started with Cisco Network Assistant

• Cisco Small Form-Factor Pluggable Modules Installation Notes

viii

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Preface

Obtaining Documentation, Obtaining Support, and Security Guidelines

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, Obtaining Support, and Security Guidelines

For information on obtaining documentation, obtaining support, providing documentation feedback, security guidelines, and also recommended aliases and general Cisco documents, see the monthly What's New in Cisco Product Documentation, which also lists all new and revised Cisco technical documentation, at this URL:

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

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

Obtaining Documentation, Obtaining Support, and Security Guidelines

Preface

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Features

CHA P T ER

Product Overview

The Catalyst 3750 family of switches—also referred to as the switches—are stackable Ethernet switches to which you can connect devices like Cisco IP Phones, Cisco Wireless Access Points workstations, and other network devices such as servers, routers, and other switches. This chapter provides a functional overview of the Catalyst 3750 switch models. These topics are included:

• Features, page 1-1

• Front Panel Description, page 1-3

• Rear Panel Description, page 1-21

• Management Options, page 1-26

The switches can be deployed as backbone switches, aggregating 10BASE-T, 100BASE-TX, and 1000BASE-T Ethernet traffic from other network devices. See the switch software configuration guide for examples that show how you might deploy the switches in your network.

OL-6336-10

Figure 1-3 through Figure 1-15 show the Catalyst 3750 switches.

These are the switch features:

• Fast Ethernet Configurations

–

Catalyst 3750-24FS switch—24 100BASE-FX ports and 2 small form-factor pluggable (SFP) module slots

–

Catalyst 3750-24TS switch—24 10/100 Ethernet ports and 2 SFP module slots

–

Catalyst 3750-48TS switch—48 10/100 Ethernet ports and 4 SFP module slots

–

Catalyst 3750-24PS switch—24 10/100 Power over Ethernet (PoE) ports and 2 SFP module slots

–

Catalyst 3750-48PS switch—48 10/100 PoE ports and 4 SFP module slots

–

Catalyst 3750V2-24FS switch—24 SFP module slots (downlink) and 2 SFP module slots (uplink)

–

Catalyst 3750V2-24TS switch—24 10/100 Ethernet ports and 2 SFP module slots

–

Catalyst 3750V2-48TS switch—48 10/100 Ethernet ports and 4 SFP module slots

–

Catalyst 3750V2-24PS switch—24 10/100 PoE ports and 2 SFP module slots

–

Catalyst 3750V2-48PS switch—48 10/100 PoE ports and 4 SFP module slots

Catalyst 3750 Switch Hardware Installation Guide

1-1

Features

• Gigabit Ethernet Configurations

–

Catalyst 3750G-12S switch—12 SFP module slots

–

Catalyst 3750G-12S-SD switch—12 SFP module slots

–

Catalyst 3750G-24T switch—24 10/100/1000 Ethernet ports

–

Catalyst 3750G-24TS switch—1.5 rack units (RU)—24 10/100/1000 Ethernet ports and 4 SFP module slots

–

Catalyst 3750G-24TS-1U switch—1 RU—24 10/100/1000 Ethernet ports and 4 SFP module slots

–

Catalyst 3750G-48TS switch—48 10/100/1000 Ethernet ports and 4 SFP module slots

–

Catalyst 3750G-24PS switch—24 10/100/1000 PoE ports and 4 SFP module slots

–

Catalyst 3750G-48PS switch—48 10/100/1000 PoE ports and 4 SFP module slots

–

Catalyst 3750G-24WS-S25 switch—24 10/100/1000 PoE ports, 2 SFP module slots, and an integrated Cisco wireless LAN controller supporting up to 25 Cisco Lightweight Access Points

–

Catalyst 3750G-24WS-S50 switch—24 10/100/1000 PoE ports, 2 SFP module slots, and an integrated Cisco wireless LAN controller supporting up to 50 Cisco Lightweight Access Points

Chapter 1 Product Overview

• 10-Gigabit Ethernet Configuration

–

Catalyst 3750G-16TD switch—16 10/100/1000 Ethernet ports and 1 10-Gigabit Ethernet XENPAK module slot

Note The 10-Gigabit Ethernet XENPAK modules are referred to as 10-Gigabit Ethernet module

ports in the software documentation.

• The switches support these SFP modules:

–

100BASE-FX multimode fiber (MMF)

–

1000BASE-BX

–

1000BASE-LX

–

1000BASE-SX

–

1000BASE-ZX

–

1000BASE-T

–

Coarse wavelength-division multiplexing (CWDM)

Note When you install 1000BASE-T SFP modules in Catalyst 3750 switches, they can operate either

at 10, 100, or 1000 Mb/s in full-duplex mode or at 10 or 100 Mb/s in half-duplex mode.

1-2

• For a list of the XENPAK modules that the Catalyst 3750G-16TD switch supports, see Tab l e B - 2 on

page B-4.

• Configuration

–

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

–

For 10/100/1000 ports, autonegotiates the speed and supports only full-duplex mode

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 1 Product Overview

132240

Catalyst 35

SERIES

SYST

RPS

STAT

DUPLX

SPEED

STACK

MODE

MASTR

Note You can configure duplex mode to half, full, or autonegotiate on Gigabit Ethernet interfaces

if the speed is set to 10 or 100 Mb/s. You cannot configure half-duplex mode on Gigabit Ethernet interfaces if the interface speed is 1000 Mb/s.

• The Catalyst 3750 switches support stacking. You can stack up to nine switches in a stack by cabling

the StackWise ports. StackWise ports are not user-configurable.

• Switches are hot-swappable.

• Connection for an optional Cisco RPS 2300 or Cisco RPS 675 redundant power system (RPS) that

operates on AC input and supplies backup DC power output to the Catalyst 3750 switches. The Catalyst 3750G-12S-SD switch does not support an RPS.

Front Panel Description

These sections describe the Fast Ethernet and Gigabit Ethernet switches:

• Fast Ethernet Switches, page 1-3

• Gigabit Ethernet Switches, page 1-6

• 10/100 and 10/100/1000 Ports, page 1-10

Front Panel Description

• SFP Module Slots, page 1-12

• XENPAK Module Slot (Catalyst 3750G-16TD Switch), page 1-13

• LEDs, page 1-13

Fast Ethernet Switches

Catalyst 3750-24FS and 3750V2-24FS Switch Front Panel

The 100BASE-FX ports on the Catalyst 3750-24FS switch are numbered 1 through 24, as shown in

Figure 1-1. The SFP modules slots are numbered 1 (left) and 2 (right).

Figure 1-1 Catalyst 3750-24FS Switch

1 100BASE-FX ports 2 SFP module slots

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

1-3

Front Panel Description

Catalyst 3750

SERIES

SYST

RPS

MASTR

STAT

DUPLX

SPEED

STACK

MODE

13X

14X

23X

24X

11X

12X

86541

Note The Catalyst 3750V2-24FS switch supports the 100BASE-FX multimode fiber (MMF) SFPs only in the

Chapter 1 Product Overview

The downlink SFP module slots on the Catalyst 3750V2-24FS switch are numbered 1 through 24. The slots are grouped in pairs. The first member of the pair (slots 1) is above the second member (slots 2), as shown in Figure 1-2.

downlink SFP module slots.

The uplink SFP modules slots are numbered 1 (left) and 2 (right).

Figure 1-2 Catalyst 3750V2-24FS Switch

279984

1 SFP module slots (downlink) 2 SFP module slots (uplink)

Catalyst 3750-24TS and 3750V2-24TS Switch Front Panel

The 10/100 ports on the switch are numbered 1 through 24. The ports are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2), as shown in Figure 1-3. Port 3 is above port 4, and so on. The SFP module slots are numbered 1 (left) and 2 (right).

Figure 1-3 Catalyst 3750-24TS and 3750V2-24TS Switch

1 10/100 ports 2 SFP module slots

1-4

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 1 Product Overview

Catalyst 3750

SERIES

SYST

RPS

MASTR

STAT

DUPLX

SPEED

STACK

MODE

17X

18X

33X

34X

15X

16X

31X

32X

47X

48X

86542

104577

Catalyst 3

750

SERIES

SYST

RPS

STAT

DUPLX

SPEED

PoE

MODE

11X

12X

13X

14X

23X

24X

Catalyst 3750-48TS and 3750V2-48TS Switch Front Panel

The 10/100 ports on the switch are numbered 1 through 48. The ports are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2), as shown in Figure 1-4. Port 3 is above port 4, and so on. The SFP module slots are numbered 1 to 4.

Figure 1-4 Catalyst 3750-48TS and 3750V2-48TS Switch

Front Panel Description

1 10/100 ports 2 SFP module slots

Catalyst 3750-24PS and 3750V2-24PS Switch Front Panel

The 10/100 PoE ports on the switch are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2), as shown in Figure 1-5. Port 3 is above port 4, and so on. The SFP module slots are numbered 1 and 2.

Figure 1-5 Catalyst 3750-24PS and 3750V2-24PS Switch

1 10/100 PoE ports 2 SFP module slots

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

1-5

Front Panel Description

104576

Catalyst 37

SERIES

SYST

RPS

STAT

DUPLX

SPEED

PoE

MODE

15X

16X

29 30

17X

18X

31X

32X

45 46

33X

34X

47X

48X

Catalyst 3750

SERIES

SYST

RPS

MASTR

STAT

DUPLX

SPEED

STACK

MODE

97166

Catalyst 3750-48PS and 3750V2-48PS Switch Front Panel

The 10/100 PoE ports on the switch are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2), as shown in Figure 1-6. Port 3 is above port 4, and so on. The SFP module slots are numbered 1 to 4.

Figure 1-6 Catalyst 3750-48PS and 3750V248-PS Switch

1 10/100 PoE ports 2 SFP module slots

Chapter 1 Product Overview

Gigabit Ethernet Switches

Catalyst 3750G-12S and Catalyst 3750G-12S-SD Switch Front Panel

The SFP module slots on the switch are numbered 1 through 12. The slots are grouped in three sets of four, as shown in Figure 1-7.

Figure 1-7 Catalyst 3750G-12S and 3750G-12S-SD Switch

1 SFP module slots

Catalyst 3750-24T, 3750G-24TS, and 3750G-24TS-1U Switch Front Panel

The 10/100/1000 ports on switch are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2), as shown in Figure 1-8, Figure 1-9, and Figure 1-10. Port 3 is above port 4, and so on.

The SFP module slots are numbered 25 to 28 on the Catalyst 3750G-24TS Switch (Figure 1-9) and on

Catalyst 3750 Switch Hardware Installation Guide

1-6

the Catalyst 3750G-24TS-1U Switch (Figure 1-10).

OL-6336-10

Chapter 1 Product Overview

Catalyst 3750

SERIES

SYST

RPS

MASTR

STAT

DUPLX

SPEED

STACK

MODE

13X

14X

23X

24X

11X

12X

86543

Catalyst 3750

SERIES

SYST

RPS

MASTR

STAT

DUPLX

SPEED

STACK

MODE

13X

14X

23X

24X

11X

12X

86544

119768

Catalyst 3750

SERIES

MODE

11X

12X

13X

14X

23X

24X

RPS

STAT

DUPLX

SPEED

MASTR

STACK

SYST

Figure 1-8 Catalyst 3750G-24T Switch

1 10/100/1000 ports

Figure 1-9 Catalyst 3750G-24TS Switch

Front Panel Description

1 10/100/1000 ports 2 SFP module slots

Figure 1-10 Catalyst 3750G-24TS-1U Switch

1 10/100/1000 ports 2 SFP module slots

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

1-7

Front Panel Description

119770

Catalyst 3750G

SERIES

SYST

RPS

STAT

DUPLX

SPEED

MODE

7 8

15X

16X

17X

18X

31X

32X

33X

34X

47X

48X

MASTR

STACK

119769

Catalyst 3750G

SERIES

PoE-24

MODE

11X

12X

13X

14X

23X

24X

RPS

STAT

DUPLX

SPEED

PoE

MASTR

STACK

SYST

Catalyst 3750G-48TS Switch Front Panel

The 10/100/1000 ports on the switch are numbered 1 through 48 and grouped in pairs. The first member of the pair (port 1) is above the second member (port 2), as shown in Figure 1-11. Port 3 is above port 4, and so on. The SFP module slots are numbered 49 to 52.

Figure 1-11 Catalyst 3750G-48TS Switch

Chapter 1 Product Overview

1 10/100/1000 ports 2 SFP module slots

Catalyst 3750G-24PS Switch Front Panel

The 10/100/1000 PoE ports on the switch are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2), as shown in Figure 1-12. Port 3 is above port 4, and so on. The SFP module slots are numbered 25 to 28.

Figure 1-12 Catalyst 3750G-24PS Switch

1 10/100/1000 PoE ports 2 SFP module slots

1-8

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 1 Product Overview

119771

Catalyst 37

50G

SERIES

PoE-48

SYST

RPS

STAT

DUPLX

SPEED

PoE

MODE

7 8

15X

16X

17X

18X

31X

32X

33X

34X

47X

48X

MASTR

STACK

SYST

RPS

MASTR

STAT

DUPLX

SPEED

STACK

MODE

Catalyst 3750

series

104572

15X

16X

Catalyst 3750G-48PS Switch Front Panel

The 10/100/1000 PoE ports on the switch are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2), as shown in Figure 1-13. Port 3 is above port 4, and so on. The SFP module slots are numbered 49 to 52.

Figure 1-13 Catalyst 3750G-48PS Switch

Front Panel Description

1 10/100/1000 PoE ports 2 SFP module slots

Catalyst 3750G-16TD Switch Front Panel

The 10/100/1000 ports on the switch are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2), as shown in Figure 1-14. Port 3 is above port 4, and so on. The XENPAK module slot is numbered 1.

Note The 10-Gigabit Ethernet XENPAK modules are referred to as 10-Gigabit Ethernet module ports in the

software documentation.

Figure 1-14 Catalyst 3750G-16TD Switch

1 10/100/1000 ports 2 XENPAK module slot

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

1-9

10/100 and 10/100/1000 Ports

Catalyst 3750G

SERIES

PoE-24

Wireless LAN Controller

SYST RPS MASTR STAT DUPLX SPEED STACK PoE

11X

12X

13X

14X

23X

24X

141726

Catalyst 3750G Integrated Wireless LAN Controller Switch Front Panel

The Catalyst 3750G Integrated Wireless LAN Controller switches have an integrated Cisco wireless LAN controller. Depending on the switch model, the integrated wireless controller can support up to 25 or 50 Cisco Lightweight Access Points. The 10/100/1000 PoE ports switch are numbered 1 through 24 and grouped in pairs. The first member of the pair (port 1) is above the second member (port 2), as shown in Figure 1-15. Port 3 is above port 4, and so on. The SFP module slots are numbered 25 and 26. The switch also has two internal Gigabit Ethernet ports that connect the switch and the controller. The internal ports are numbered as ports 27 and 28 and are not visible on the front panel.

Figure 1-15 Catalyst 3750G-24WS-S25 and 3750G-24WS-S50 Switch

Chapter 1 Product Overview

1 10/100/1000 PoE ports 2 SFP module slots

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 10/100/1000 ports to operate in 10 or 100 Mb/s in half or full duplex, or in 1000 Mb/s in full duplex.

You can set both the 10/100 and the 10/100/1000 ports for speed and duplex autonegotiation, in compliance with IEEE 802.3AB. (The default setting is autonegotiate.)

Note You can configure duplex mode to half, full, or autonegotiate on Gigabit Ethernet interfaces if the speed

is set to 10 or 100 Mb/s. You cannot configure half-duplex mode on Gigabit Ethernet interfaces if the interface speed is 1000 Mb/s.

When set for autonegotiation, the port senses 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 (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 328 feet (100 meters).

The 10/100 or the 10/100/1000 PoE ports on the switch provide PoE support for devices that are compliant with IEEE 802.3af. They also provide Cisco pre-standard PoE support for Cisco IP Phones and Cisco Aironet Access Points.

Catalyst 3750 Switch Hardware Installation Guide

1-10

OL-6336-10

Chapter 1 Product Overview

On 24-port switches, the ports can deliver up to 15.4 W of PoE. On the 48-port switches, any 24 of the 48 ports can deliver 15.4 W of PoE, or any combination of the ports can deliver an average of 7.7 W of PoE at the same time, up to a maximum switch power output of 370 W.

Each of the Catalyst 3750G-24WS-S25 and 3750G-24WS-S50 switch PoE ports can deliver up to

15.4 W of PoE.

On a per-port basis, you can control whether a Catalyst 3750 PoE port automatically provides power when an IP phone or an access point is connected. The device manager and the CLI provide two PoE settings for each 10/100 or 10/100/1000 PoE port: Auto (the default) and Never.

• When you select Auto, the port only provides power if a valid powered device, such as an

• When you select Never, the port does not provide power even if a Cisco IP phone or an access point

Cisco enhanced power negotiation allows some powered devices, such as the Cisco 7970G IP Phone, to operate in high-power mode on Catalyst 3750 PoE switches. The powered device and the switch negotiate through power-negotiation Cisco Discovery Protocol (CDP) messages for an agreed-upon power-consumption level. The negotiation allows a high-power Cisco powered device that consumes more than 7 W to operate at its highest power mode. The powered device first boots up in low-power mode, consumes less than 7 W, and negotiates to obtain enough power to operate in high-power mode. The device changes to high-power mode only when it receives confirmation from the switch. High-power devices can operate in low-power mode on switches that do not support power-negotiation CDP.

For information about configuring and monitoring PoE ports, see the device manager online help and the switch software configuration guide.

10/100 and 10/100/1000 Ports

IEEE 802.3af-compliant powered device, a Cisco pre-standard IP phone, or a Cisco pre-standard Cisco access point, is connected to it.

is connected to it. For information about configuring and monitoring PoE ports, see the device manager online help and the switch software configuration guide.

Note You also can connect a Cisco IP Phone or Cisco Aironet Access Point to a Catalyst 3750 PoE switch

10/100 or 10/100/1000 port and to an AC power source for redundant power. The powered device might change to the AC power source as its primary power source when connected to it. In that case, the PoE port becomes the backup power source for the powered device.

If the primary source fails, the second power source becomes the primary power source to the powered device. During the power transfer, an IP Phone might reboot or reestablish link with the switch.

For information about Cisco IP Phones and Cisco Aironet Access Points, see the documentation that came with your IP phone or access point.

Note 100BASE-TX and 1000BASE-T traffic requires a Category 5 or later 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 using a straight-through or crossover cable for 1000BASE-T connections, be sure to use a twisted four-pair, Category 5 or later cable for proper operation. Pinouts for the cables are described in

Appendix A, “Technical Specifications.”

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

1-11

10/100 and 10/100/1000 Ports

You can use the mdix auto interface configuration command in the CLI to enable the automatic medium-dependent interface crossover (auto-MDIX) feature. When you enable the auto-MDIX feature, the switch detects the required cable type for copper Ethernet connections and configures the interfaces accordingly. Therefore, you can use either a crossover or a straight-through cable for connections to a copper 10/100, 10/100/1000, or 1000BASE-T SFP module port on the switch, no matter what type of device is on the other end of the connection.

The auto-MDIX feature is enabled by default on switches running Cisco IOS Release 12.2(18)SE or later. For releases between Cisco IOS Release 12.1(14)EA1 and 12.2(18)SE, the auto-MDIX feature is disabled by default. For configuration information for this feature, see the switch software configuration guide or the switch command reference.

Many legacy powered devices, including older Cisco IP phones and access points that do not fully support IEEE 802.3af, might not support PoE when connected to the switches by a crossover cable.

100BASE-FX Ports

The 100BASE-FX ports use 50/125- or 62.5/125-micron multimode fiber-optic cabling. In full-duplex mode, the cable length from a switch to an attached device cannot exceed 6,562 feet (2 kilometers).

The 100BASE-FX ports operate only at 100 Mb/s in either full- or half-duplex mode and do not support autonegotiation. The half-duplex mode is the default setting.

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 that are listed in Table B-1 on page B-3.

Chapter 1 Product Overview

SFP Module Slots

Catalyst 3750 switches with SFP module slots support these SFP modules:

• 100BASE-FX (MMF)

Note The Catalyst 3750V2-24FS switch supports the 100BASE-FX multimode fiber (MMF) SFPs

• 1000BASE-BX

• 1000BASE-LX

• 1000BASE-SX

• 1000BASE-ZX

• 1000BASE-T

• CWDM

For a list of the SFP modules that the switches support, see the Catalyst 3750 switch release notes.

only in the downlink SFP module slots.

1-12

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 1 Product Overview

SFP Modules

The Catalyst 3750 switch uses Gigabit Ethernet SFP modules to establish connections to other devices. 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 LC or MT-RJ connectors to connect to a fiber-optic SFP module. You use a Category 5 or higher cable with RJ-45 connectors to connect to a copper SFP module.

For more information about these SFP modules, see your SFP module documentation.

XENPAK Module Slot (Catalyst 3750G-16TD Switch)

The Catalyst 3750G-16TD switch uses 10-Gigabit Ethernet XENPAK modules to establish connections to networks. You install the modules in the module slot in the switch front panel. See Table B-2 on

page B-4 for a list of XENPAK modules that the Catalyst 3750G-16TD switch supports.

Note The 10-Gigabit Ethernet XENPAK modules are referred to as 10-Gigabit Ethernet module ports in the

software documentation.

10/100 and 10/100/1000 Ports

LEDs

You can use the switch LEDs to monitor switch activity and its performance. Figure 1-16, Figure 1-17, and Figure 1-18 show the switch LEDs and the Mode button that you use to select one of the port modes.

All LEDs are visible through the GUI management applications—the Network Assistant application for multiple switches and the device manager GUI for a single switch. The switch software configuration guide describes how to use the command-line interface (CLI) to configure and monitor individual switches and switch clusters.

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

1-13

10/100 and 10/100/1000 Ports

MODE

RPS

STAT

DUPLX

SPEED

MASTR

STACK

SYST

132966

21 3 4 6 7 85

RPS

SYST

MASTR

STAT

DUPLX

SPEED

STACK

PoE

MODE

2 3 4 5 7 81

6 9

104062

Figure 1-16 Switch LEDs (No PoE)

1 Mode button 5 Status LED

2 Stack LED 6 Master LED

3 Speed LED 7 RPS LED

4 Duplex LED 8 System LED

1. The RPS LED is not used on the Catalyst 3750G-12S-SD switch.

Chapter 1 Product Overview

Figure 1-17 Switch LEDs (PoE)

1 Mode button 6 Status LED

2 PoE LED 7 Master LED

3 Stack LED 8 RPS LED

4 Speed LED 9 System LED

5 Duplex LED

1-14

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 1 Product Overview

SYST RPS MASTR STAT DUPLX SPEED STACK PoE

2 3 4 5 7 81

6 9

141727

Figure 1-18 Catalyst 3750G-24WS-S25 and 3750G-24WS-S50 Switch LEDs

10/100 and 10/100/1000 Ports

System LED

1 Mode button 6 Status LED

2 PoE LED 7 Master LED

3 Stack LED 8 RPS LED

4 Speed LED 9 System LED

5 Duplex 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.

Alternating green and amber

1. Applies only to the Catalyst 3750G-24WS-S25 and 3750G-24WS-S50 switches.

Wireless controller is not functioning properly.

OL-6336-10

For information on the System LED colors during power-on self-test (POST), see the “Powering On the

Switch and Running POST” section on page 2-7.

Catalyst 3750 Switch Hardware Installation Guide

1-15

10/100 and 10/100/1000 Ports

RPS LED

Chapter 1 Product Overview

The RPS LED shows the RPS status. Tab le 1 -2 lists the LED colors and their meanings. The RPS LED is not used on the Catalyst 3750G-12S-SD switch.

Table 1-2 RPS LED

Color RPS Status

Off RPS is off or not properly connected.

Green RPS is connected and ready to provide back-up power, if required.

Flashing green RPS is connected but is unavailable because it is providing power to another device

(redundancy has been allocated to a neighboring device).

Amber The RPS is in standby mode or in a fault condition. Press the Standby/Active button

on the RPS, and the LED should turn green. If it does not, the RPS fan could have failed. Contact Cisco Systems.

Flashing amber The internal power supply in a switch has failed, and the RPS is providing power

to the switch (redundancy has been allocated to this device).

Master LED

For more information about the Cisco RPS 2300, see the Cisco Redundant Power System 2300 Hardware Installation Guide. For more information about the Cisco RPS 675, see the Cisco RPS 675 Redundant Power System Hardware Installation Guide. These guides are available on Cisco.com.

The Master LED shows the stack master status. Table 1- 2 lists the LED colors and their meanings.

Table 1-3 Master LED

Port Mode Description

Off Switch is not the stack master.

Green Switch is the stack master or a standalone switch.

Amber An error occurred when the switch was selecting the stack master switch or a stack error.

1-16

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 1 Product Overview

Port LEDs and Modes

Each RJ-45 port, SFP module slot, and XENPAK 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 1-4 lists the mode LEDs and their associated port modes and meanings.

Table 1-4 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, 100, or 1000 Mb/s.

STACK Stack member status

PoE 10/100 and 10/100/1000

StackWise port status

PoE port power

10/100 and 10/100/1000 Ports

Note The 10/100/1000 ports operate only in full-duplex

mode.

The stack member status.

The StackWise port status. See the “Stack LED” section on

page 1-19 for more information.

The PoE status.

Table 1- 5 lists the PoE LED colors and their meanings.

Table 1-5 PoE Mode LED

Color PoE Status

Off PoE mode is not selected. None of the 10/100 or 10/100/1000 ports have been

denied power or are in a fault condition.

Green PoE mode is selected, and the PoE status is shown on the port LEDs.

Blinking amber PoE mode is not selected. At least one of the 10/100 or 10/100/1000 ports has been

denied power, or at least one of the 10/100 or 10/100/1000 ports has a PoE fault.

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 1-6 explains how to interpret the port LED colors in different port modes.

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

1-17

10/100 and 10/100/1000 Ports

Table 1-6 Meaning of LED Colors in Different Modes on the Switch

Port Mode Port LED Color Meaning

PoE

Chapter 1 Product Overview

Off PoE is off. If the powered device is receiving power from an AC

power source, the port LED is off even if the powered device is connected to the switch port.

Green PoE is on. The port LED is green only when the switch port is

providing power.

Alternating green and

PoE is denied because providing power to the powered device will exceed the 370 W switch power capacity.

amber

Blinking amber PoE is off due to a fault.

Caution PoE faults are caused when noncompliant cabling or

powered devices are connected to a PoE port. Only standard-compliant cabling can be used to connect Cisco pre-standard IP Phones and wireless access points or IEEE 802.3af-compliant devices to PoE ports. A cable or device that causes a PoE fault must be removed from the network.

STAT (port status)

DUPLX (duplex)

Amber PoE for the port has been disabled.

Note PoE is enabled by default.

Off No link, or port was administratively shut down.

Green Link present.

Blinking green Activity. Port is sending or receiving data.

Alternating green-amber

Link fault. Error frames can affect connectivity, and errors such as excessive collisions, cyclic redundancy check (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.

Blinking amber Port is blocked by STP and is sending and receiving packets.

Off Port is operating in half duplex.

Green Port is operating in full duplex.

1-18

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 1 Product Overview

Table 1-6 Meaning of LED Colors in Different Modes on the Switch (continued)

Port Mode Port LED Color Meaning

SPEED

STACK (stack member)

1. The PoE LED is only on the Catalyst 3750-24PS, 3750G-24PS, 3750-48PS, 3750G-48PS, 3750G-24WS-S25 and

10/100 and 10/100/1000 Ports

10/100 and 10/100/1000 ports

Off Port is operating at 10 Mb/s.

Green Port is operating at 100 Mb/s.

Blinking green Port is operating at 1000 Mb/s.

SFP module ports

Off Port is operating at 10 Mb/s.

Green Port is operating at 100 Mb/s.

Blinking green Port is operating at 1000 Mb/s.

Note When installed in Catalyst 3750 switches, 1000BASE-T

SFP modules can operate at 10, 100, or 1000 Mb/s in full-duplex mode or at 10 or 100 Mb/s in half-duplex mode.

XENPAK port

Off Port is not operating.

Blinking green Port is operating at up to 10 Gb/s.

Off No stack member corresponding to that member number.

Blinking green Stack member number.

Green Member numbers of other stack member switches.

3750G-24WS-S50 switches.

Stack LED

If your switches are stacked and you press the Mode button on any one of the switches in the stack, all the switches in the stack change to display the same selected mode. For example, if you press the mode button on the stack master to display SPEED, all the other switches in the stack also display SPEED.

The PoE LED is on the Catalyst 3750-24PS, 3750G-24PS, 3750-48PS, 3750G-48PS, 3750G-24WS-S25 and 3750G-24WS-S50 switches. Even if PoE mode is not selected on the switches, this LED still shows PoE problems if they are detected. The Catalyst 3750G-S-SD does not have a PoE LED.

The stack LED shows the sequence of member switches in a stack. Up to nine switches can be members of a stack. The first nine port LEDs show the member number of a switch in a stack. Figure 1-19 shows the LEDs on the first switch, which is stack member number 1. For example, if you press the Mode button and select Stack, the LED for port 1 flashes green. The LEDs for port 2 and 3 are solid green, as these represent the member numbers of other switches in the stack. The other port LEDs are off because there are no more members in the stack.

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

1-19

10/100 and 10/100/1000 Ports

Catalyst 3750

SERIES

SYST

RPS

MASTR

STAT

DUPLX

SPEED

STACK

MODE

17X

18X

33X

34X

15X

16X

31X

32X

47X

48X

Catalyst 3750

SERIES

SYST

RPS

MASTR

STAT

DUPLX

SPEED

STACK

MODE

17X

18X

33X

34X

15X

16X

31X

32X

47X

48X

Catalyst 3750

SERIES

SYST

RPS

MASTR

STAT

DUPLX

SPEED

STACK

MODE

17X

18X

33X

34X

15X

16X

31X

32X

47X

48X

132420

Figure 1-19 Stack LED

1 Stack member 1 3 Stack member 3

2 Stack member 2

Chapter 1 Product Overview

When you select the Stack LED, the representative Stack LEDs are green when the StackWise ports (on the switch rear panel) are up, and the representative Stack LEDs are amber when the ports are down:

• SFP module port LEDs 1 and 2 on the Catalyst 3750-24TS and 3750V2-24TS switch show the status

for StackWise ports 1 and 2, respectively.

• SFP module port LEDs 3 and 4 on the Catalyst 3750-48TS and 3750V2-48TS switch show the status

for StackWise ports 1 and 2, respectively.

• SFP module port LEDs 51 and 52 on the Catalyst 3750G-48TS and 3750G-48PS switches show the

status for StackWise ports 1 and 2, respectively.

• SFP module port LEDs 27 and 28 on the Catalyst 3750G-24TS, 3750G-24TS-1U, and 3750G-24PS

switches show the status for StackWise ports 1 and 2, respectively.

• The 10/100/1000 port LEDs 23 and 24 on the Catalyst 3750G-24T switch show the status for

StackWise ports 1 and 2, respectively.

• SFP module port LEDs 11 and 12 on the Catalyst 3750G-12S and the Catalyst 3750G-12S-SD

switch show the status for StackWise ports 1 and 2, respectively.

• SFP module port LEDs 25 and 26 on the Catalyst 3750G-24WS-S25, and 3750G-24WS-S50

switches show the status for StackWise ports 1 and 2, respectively.

Note If the port LEDs are green on all the switches in the stack, the stack is operating at full bandwidth

Catalyst 3750 Switch Hardware Installation Guide

1-20

(32 Gb/s). If any of the port LEDs are not green, the stack is not operating at full bandwidth.

OL-6336-10

Chapter 1 Product Overview

RATING

100-200V ~

1.6A-0>9A, 50-60 HZ

DC INPUTS FOR REMOTE

POWER SUPPLY

SPECIFIED IN MANUAL

+12v @8.5a

CONSOLE

STACK 1

STACK 2

2 3 4 5

86548

274672

CONSOLE

STACK 1

STACK 2

Rear Panel Description

The switch rear panel has an AC or DC power connector, an RPS connector (except for the Catalyst 3750G-12S-SD switch), an RJ-45 console port, two StackWise ports, and a service port (only on the Catalyst 3750G Integrated Wireless LAN Controller switches).

Figure 1-20 Catalyst 3750-24TS, 3750G-24T, 3750G-12S, 3750G-16TD, and 3750-48TS Switch

Rear Panel Description

1 StackWise ports 4 AC power connector

2 RJ-45 console port 5 RPS connector

3 Fan exhaust

Figure 1-21 Catalyst 3750V2-24TS, 3750V2-24PS, 3750V2-48TS, and 3750V2-48PS Switch

1 StackWise ports 4 RPS connector

2 RJ-45 console port 5 AC power connector

3 Fan exhaust

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

1-21

Rear Panel Description

CONSOLE

STACK 1

STACK 2

DC INPUTS FOR REMOTE

POWER SUPPLY

SPECIFIED IN MANUAL

+12v @17a

2 3 4 5

86547

132634

CONSOLE

STACK 1

STACK 2

–

36 - 72V

3.0 - 1.5A

–

Chapter 1 Product Overview

Figure 1-22 Catalyst 3750G-24TS Switch

1 StackWise ports 4 AC power connector

2 RJ-45 console port 5 RPS connector

3 Fan exhaust

Figure 1-23 Catalyst 3750G-12S-SD Switch Rear Panel

1 StackWise ports 4 DC power connector

2 RJ-45 console port 5 Ground lug bracket

3 Fan exhaust

1-22

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 1 Product Overview

CONSOLE

DC INPUTS FOR REMOTE

POWER SUPPLY

SPECIFIED IN MANUAL

132241

STACK 1

STACK 2

104763

RATING

100-240V ~

1.6A-0>9A, 50-60 HZ

DC INPUTS FOR REMOTE

POWER SUPPLY

SPECIFIED IN MANUAL

+12v @8.5A

CONSOLE

STACK 1

STACK 2

Figure 1-24 Catalyst 3750-24FS and 3750V2-FS Switch

1 StackWise ports 4 RPS connector

2 RJ-45 console port 5 AC power connector

3 Fan exhaust

Figure 1-25 Catalyst 3750-24PS and 3750-48PS Switch

Rear Panel Description

1 StackWise ports 3 AC power connector

2 RJ-45 console port 4 RPS connector

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

1-23

Rear Panel Description

CONSO

DC INPUTS FOR REMOTE

POWER SUPPLY

SPECIFIED IN MANUAL

119772

STACK 1

STACK 2

STACK A

STACK B

DC INPUTS FOR REMOTE

POWER SUPPLY

SPECIFIED IN MANUAL

2 3 5 76

141728

CONTROLLER

CONSOLE

SERVICE

SWITCH CONSOLE

Chapter 1 Product Overview

1 StackWise ports 4 RPS connector

2 RJ-45 console port 5 AC power connector

3 Fan exhaust

Figure 1-27 Catalyst 3750G-24WS-S25 and 3750G-24WS-S50 Switch

Figure 1-26 Catalyst 3750G-24PS, 3750G-24TS-1U, 3750G-48PS, and 3750G-48TS Switch

StackWise Ports

Caution Use only approved cables (CAB-STACK-50CM, CAB-STACK-1M, or CAB-STACK-3M), and connect

Catalyst 3750 Switch Hardware Installation Guide

1-24

1 StackWise ports 5 RPS connector

2 RJ-45 switch console port 6 Service port

3 RJ-45 controller console port 7 AC power connector

4 Fan exhaust

The switch ships with a 0.5-meter StackWise cable (72-2632-XX CABASY) that you can use to connect the StackWise ports.

only to similar Cisco equipment. Equipment might be damaged if connected to other nonapproved Cisco cables or equipment.

OL-6336-10

Chapter 1 Product Overview

You can order these StackWise cables from your Cisco sales representative:

• CAB-STACK-50CM= (0.5-meter cable)

• CAB-STACK-1M= (1-meter cable)

• CAB-STACK-3M= (3-meter cable)

Power Connectors

The switch is powered through the internal power supply. Except on the Catalyst 3750G-12S-SD switch, you can also connect the Cisco RPS 2300 or the Cisco RPS 675 to provide backup power should the switch internal power supply fail.

Note The Catalyst 3750 switch and the redundant power systems should be connected to the same

AC power source.

Internal Power Supply Connector

Rear Panel Description

The internal 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.

DC Power Connector

The Catalyst 3750G-12S-SD has an internal DC-power converter. It has dual feeds (A and B) that are diode-OR-ed into a single power block. For installation instructions, see Appendix C, “Connecting to

DC Power.”

Caution You must connect the Catalyst 3750G-12S-SD switch only to a DC-input power source that has an input

supply voltage from –36 to –72 VDC. If the supply voltage is not in this range, the switch might not operate properly or might be damaged.

Cisco RPS Connector

The Cisco RPS 2300 (model PWR-RPS2300) and the Cisco RPS 675 (model PWR675-AC-RPS-N1=) support the Catalyst 3750 family of switches, except for the Catalyst 3750G-12S-SD switch.

Cisco RPS 2300

The Cisco RPS 2300 has two output levels: –52 V and 12 V with a maximum output power of 2300 W.

The Cisco RPS 2300 is a redundant power system that provides seamless failover for up to six network devices for internal power supply failures. It automatically senses if an internal power supply of a connected device fails and immediately supplies power to the failed device. For more information on the Cisco RPS 2300, see the Cisco RPS 2300 Redundant Power System Hardware Installation Guide.

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

1-25

Management Options

Cisco RPS 675

Console Port

Chapter 1 Product Overview

The Cisco RPS 675 has two output levels: –48 V and 12 V with a maximum output power of 675 W. Use the supplied RPS connector cable to connect the RPS to the switch.

The RPS is a redundant power system that can support six external network devices and provides power to one failed device at a time. It automatically senses when the internal power supply of a connected device fails and provides power to the failed device, preventing loss of network traffic. For more information on the Cisco RPS 675, see the Cisco RPS 675 Redundant Power System Hardware Installation Guide.

You can connect the switch to a PC by means of the console port and 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 the “Connector and Cable

Specifications” section on page B-1.

Note On the Catalyst 3750G-24WS-S25 and the 3750G-24WS-S50 switches, there are two console ports; the

switch console port and the controller console port. The controller console port can be used to directly configure the controller if you lose connectivity between the switch and the controller.

Management Options

The Catalyst 3750 switches offer several management options:

• Network Assistant

Cisco Network Assistant is a PC-based network management GUI application optimized for LANs of small and medium-sized businesses. Cisco Network Assistant offers centralized management of Cisco switches that range from the Cisco Catalyst 2950 through the Cisco Catalyst 4506. Through a user-friendly GUI, users can configure and manage switch clusters or standalone switches. Cisco Network Assistant is available at no cost and can be downloaded from this URL:

http://www.cisco.com/cisco/software/navigator.html?mdfid=279230132http://www.cisco.com/pcgi

-bin/tablebuild.pl/NetworkAssistanti=rp

For information on starting the Network Assistant application, see the Getting Started with Cisco Network Assistant guide on Cisco.com.

• Device manager

You can use the device manager, which is in the switch memory, to manage individual and standalone switches. This is an easy-to-use web interface that offers quick configuration and monitoring. You can access the device manager from anywhere in your network through a web browser. For more information, see the device manager online help.

1-26

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 1 Product Overview

• Cisco IOS command-line interface (CLI)

• CiscoView application

• SNMP network management

Management Options

The switch CLI is based on Cisco IOS software and is enhanced to support desktop-switching features. You can fully configure and monitor the switch and switch cluster members 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 the Catalyst 3750 Switch Command Reference on Cisco.com for more information.

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. See the CiscoView documentation for more information.

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. See the switch software configuration guide on Cisco.com and the documentation that came with your SNMP application for more information.

Network Configurations

See 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.

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

1-27

Management Options

Chapter 1 Product Overview

1-28

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

CHA P 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 the planning and cabling considerations to keep in mind while planning your stack. 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 2-7

• Planning the Stack, page 2-8

• Installing the Switch, page 2-11

• Connecting StackWise Cable to StackWise Ports, page 2-30

• Installing and Removing SFP Modules, page 2-33

• Installing and Removing XENPAK Modules (Catalyst 3750G-16TD Switch), page 2-35

• Connecting to the 10/100 and 10/100/1000 Ports, page 2-39

• Connecting to an SFP Module, page 2-41

• Connecting to a XENPAK Module, page 2-44

• Where to Go Next, page 2-45

Preparing for Installation

This section covers these topics:

• Warnings, page 2-2

• Installation Guidelines, page 2-6

• Box Contents, page 2-7

• Tools and Equipment, page 2-7

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

2-1

Preparing for Installation

Warnings

Chapter 2 Switch Installation

These warnings are translated into several languages in the Regulatory Compliance and Safety Information for the Catalyst 3750 Switch guide.

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.

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.

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

An exposed wire lead from a DC-input power source can conduct harmful levels of electricity. Be sure that no exposed portion of the DC-input power source wire extends from the terminal block plug.

Statement 122

Blank faceplates (filler panels) serve three important functions: they prevent exposure to hazardous voltages and currents inside the chassis; they contain electromagnetic interference (EMI) that might disrupt other equipment; and they direct the flow of cooling air through the chassis. Do not operate the system unless all cards and faceplates are in place.

Statement 48

Statement 156

Statement 17B

Statement 43

2-2

Warning

Catalyst 3750 Switch Hardware Installation Guide

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

If a redundant power system (RPS) is not connected to the switch, install an RPS connector cover on the back of the switch.

Attach only the following Cisco RPS model to the RPS receptacle: PWR-RPS2300, PWR675-AC-RPS-N1=.

When the Catalyst 3750-12S switch and 100BASE-FX MMF small form-factor pluggable (SFP) module (model number GLC-GE-100FX) are running, the surface temperature of the removed SFP module might be hot.

Statement 377

Statement 171

Statement 265

Statement 370

OL-6336-10

Chapter 2 Switch Installation

Preparing for Installation

Warning

Read the wall-mounting instructions carefully before beginning installation. Failure to use the correct hardware or to follow the correct procedures could result in a hazardous situation to people and damage to the system.

Statement 378

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

Statement 1001

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

Statement 1003

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: 5 A

Note This warning applies only to the Catalyst 3750G-12S-SD switch.

Statement 1005

Warning

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

Note This warning applies to all the Catalyst 3750 switches except the Catalyst 3750G-12S-SD switch.

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.

Class 1 laser product.

Statement 1006

Statement 1008

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

2-3

Preparing for Installation

Chapter 2 Switch Installation

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

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

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

Statement 1028

Warning

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.

Statement 1046

To prevent the system from overheating, do not operate it in an area that exceeds the maximum recommended ambient temperature of: 45•C

Statement 1047

2-4

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 2 Switch Installation

Preparing for Installation

Warning

Statement 1071

Voltages that present a shock hazard may exist on Power over Ethernet (PoE) circuits if interconnections are made using uninsulated exposed metal contacts, conductors, or terminals. Avoid using such interconnection methods, unless the exposed metal parts are located within a restricted access location and users and service people who are authorized within the restricted access location are made aware of the hazard. A restricted access area can be accessed only through the use of a special tool, lock and key or other means of security.

No user-serviceable parts inside. Do not open.

Statement 1073

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

Statement 1072

Statement 1074

Statement 371—Power Cable and AC Adapter

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

electromagnetic compatibility and safety, connect the ethernet cables only to intrabuilding or nonexposed wiring or cabling.

Caution To comply with the Telcordia GR-1089 NEBS standard, PoE or non-PoE 10/100/1000 Ethernet port

cables that exit from either the left side or right side of the switch should be routed and tied to the nearest rack metal hardware.

Note The grounding architecture of this product is DC-isolated (DC-I).

Catalyst 3750G Integrated Wireless LAN Controller Switches

This warning applies only to the Catalyst 3750G-24WS-S25 and 3750G-24WS-S50 switches:

Warning

There is the danger of explosion if the battery is replaced incorrectly. Replace the battery only with the same or equivalent type recommended by the manufacturer. Dispose of used batteries according to the manufacturer’s instructions.

OL-6336-10

Statement 1015

Catalyst 3750 Switch Hardware Installation Guide

2-5

Preparing for Installation

Installation Guidelines

When you decide where to place the switch, be sure to observe these requirements:

• For copper Ethernet ports, including 10/100 ports, 10/100/1000 ports, and 1000BASE-T SFP

module ports, cable lengths from the switch to connected devices can be up to 328 feet (100 meters).

• See Table B-3 on page B-5 for a list of cable specifications for 1000BASE-SX, 1000BASE-LX,

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.

• See the Catalyst 3750 release notes for cable requirements for XENPAK 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.

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 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.

Chapter 2 Switch Installation

• The operating environment must be within the ranges listed in Appendix A, “Technical

Specifications.”

• Clearance to front and rear panels must be such that

–

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.

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

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

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

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

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

greater than normal room temperature.

• 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).

2-6

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 2 Switch Installation

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

–

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

–

National Electrical Manufacturers Association (NEMA) Type 1

–

International Electrotechnical Commission (IEC) IP-20

Box Contents

The switch getting started guide on Cisco.com describes the box contents. If any item is missing or damaged, contact your Cisco representative or reseller for support.

Tools and Equipment

You need to supply a number-2 Phillips screwdriver to rack-mount the switch.

Verifying Switch Operation

Before you install the switch in a rack, on a wall, or on a table or shelf, you should power on the switch and verify that the switch passes POST. See the “Running Express Setup” section in the getting started guide for the steps required to connect a PC to the switch and to run Express Setup.

Powering On the Switch and Running POST

If your configuration has an RPS, connect the switch and the RPS to the same AC power source. See the

“Power Connectors” section on page 1-25, and see the Cisco RPS documentation for more information.

Note Always set the RPS in standby mode when you are connecting devices to it and in active mode during

normal operation.

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

To power on a DC switch, see Appendix C, “Connecting to DC Power,” for complete instructions.

Warning

Attach only the Cisco RPS model to the RPS receptacle: PWR-RPS2300, PWR675-AC-RPS-N1=.

Statement 370

OL-6336-10

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.

When the switch begins POST, the System, the RPS, the Master, the Status, the Duplex, the Speed, and the Stack LEDs turn green. (On the PoE switches, the PoE LED also turns green as POST begins.) The System LED flashes green, and the other LEDs remain continuous green.

Catalyst 3750 Switch Hardware Installation Guide

2-7

Planning the Stack

When POST completes successfully, the System LED remains green. The RPS LED remains green for some time and then returns to its operating status. The other LEDs turn off and return to their operating status. When POST fails, the System LED turns amber.

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

Powering Off the Switch

After a successful POST, disconnect the power cord from the switch. Install the switch in a rack, on a wall, on a table, or on a shelf as described in the “Installing the Switch” section on page 2-11.

Planning the Stack

If you plan to stack your switches, read these sections:

• Planning Considerations, page 2-8

• Powering Considerations, page 2-8

• Cabling Considerations, page 2-9

Chapter 2 Switch Installation

• Recommended Cabling Configurations, page 2-10

Planning Considerations

Before connecting the Catalyst 3750 switches in a stack, observe these planning considerations:

• Size of the switch. For switch dimensions, see Appendix A, “Technical Specifications.” Some

switches are deeper than the other switches. Stacking switches of the same size together makes it easier to cable the switches.

• Length of cable. Depending on the configurations that you have, you might need cables of different

sizes. If you do not specify the length of the StackWise cable, the 0.5-meter cable is supplied. If you require the 1-meter cable or the 3-meter cable, you can order it from your Cisco supplier. For cable numbers, see the “StackWise Ports” section on page 1-24. The “Recommended Cabling

Configurations” section on page 2-10 provides examples of recommended configurations.

• Access to the rear ports for unrestricted cabling.

Make sure that you have access to the rear of the rack if you plan 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.

• For concepts and procedures to manage switch stacks, see the switch software configuration guide.

Powering Considerations

2-8

Consider the following guidelines before you power on the switches in a stack:

• The sequence in which you initially power on the switches might affect the switch that becomes the

stack master.

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 2 Switch Installation

• If you want a particular switch to become the stack master, power on that switch first. This switch

becomes the stack master and remains the stack master until a master re-election is required. After approximately 10 seconds, power on the remaining switches in the stack.

• If you have no preference as to which switch becomes the stack master, power on all the switches in

the stack within a 10-second timeframe. These switches participate in the stack master election. Switches powered up after the 10-second timeframe do not participate in the election.

• Power off a switch before you add it to or remove it from an existing switch stack.

Note For conditions that can cause a stack master re-election or to manually elect the stack master, see the

“Managing Switch Stacks” chapter in the switch software configuration guide.

Cabling Considerations

The illustrations in this section display cabling configuration examples that show the stack bandwidth and possible stack partitioning.

Figure 2-1 shows an example of a stack of Catalyst 3750 switches that provides full bandwidth and

redundant StackWise cable connections.

Planning the Stack

Figure 2-1 Example of a Stack with Full Bandwidth Connections

86821

Figure 2-2 shows an example of a stack of Catalyst 3750 switches with incomplete StackWise cabling

connections. This stack provides only half bandwidth and does not have redundant connections.

Figure 2-2 Example of a Stack with Half Bandwidth Connections

86823

Figure 2-3 and Figure 2-4 show examples of stacks of Catalyst 3750 switches with failover conditions.

In Figure 2-3, the StackWise cable is bad in link B; therefore, this stack provides only half bandwidth and does not have redundant connections. In Figure 2-4, link B is bad; therefore, this stack partitions into two stacks, and switch 1 and switch 3 are stack masters.

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

2-9

Planning the Stack

86822

86824

86586

Chapter 2 Switch Installation

Figure 2-3 Example of a Stack with a Failover Condition

Figure 2-4 Example of a Partitioned Stack with a Failover Condition

Recommended Cabling Configurations

This section describes the recommended cabling configurations for stacking the switches.

Stacking Switches in Vertical Racks or on a Table

Figure 2-5 is an example of a recommended configuration using the supplied 0.5-meter StackWise cable.

In this example, the switches are stacked in a vertical rack or on a table. This configuration provides redundant connections.

Figure 2-5 Stacking the Switches in a Vertical Rack or on a Table Using the 0.5-meter

StackWise Cable

The configuration examples in Figure 2-6 use the 3-meter StackWise cable in addition to the supplied

0.5-meter StackWise cable. This configuration also provides redundant connections.

2-10

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 2 Switch Installation

90532

Figure 2-6 Stacking the Catalyst 3750 Switches in a Vertical Rack or on a Table Using 0.5-meter

and 3-meter StackWise Cables

Side-by-Side Mounting in a Rack or on a Wall

Installing the Switch

86585

Figure 2-7 and Figure 2-8 are examples of recommended configurations where the switches are rack- or wall-mounted side-by-side. Use the 1-meter and 3-meter StackWise cables to connect the switches. These configuration provide redundant connections.

Figure 2-7 Stacking up to Eight Switches in a Side-by-Side Mounting Configuration

Figure 2-8 Stacking Nine Switches in a Side-by-Side Mounting Configuration 90532

Installing the Switch

This section describes these installation procedures:

• Rack-Mounting, page 2-12

• Wall-Mounting, page 2-27

86825

OL-6336-10

• Table- or Shelf-Mounting, page 2-30

Catalyst 3750 Switch Hardware Installation Guide

2-11

Installing the Switch

Rack-Mounting

Chapter 2 Switch Installation

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

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:

• Removing Screws from the Switch, page 2-12

• Attaching Brackets to the Catalyst 3750G-24TS Switch, page 2-14

• Attaching Brackets to the Catalyst 3750G Integrated Wireless LAN Controller Switches, page 2-17

• Attaching Brackets to All Other Catalyst 3750 Switches, page 2-18

• Mounting the Switch in a Rack, page 2-24

• Attaching the Cable Guide, page 2-26

Note When you install the switch in a 24-inch rack, an optional bracket kit that is not included with the switch

is required. You can order a kit containing the 24-inch rack-mounting brackets and hardware from Cisco. For the Catalyst 3750G-24TS switch, order part number RCKMNT-3550-1.5RU=. For the other Catalyst 3750 switches, order part number RCKMNT-1RU=. The Catalyst 3750G-24WS-S25 and the 3750G-24WS-S50 switch do not support 24-inch rack-mounting.

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 attached the mounting brackets.

• Figure 2-9, Figure 2-10, and Figure 2-11 show how to remove the chassis screws in a 1-rack-unit

(RU) switch.

• Figure 2-12 shows how to remove the chassis screws in a 1.5-RU switch.

• Figure 2-13 shows how to remove the chassis screws in a 2-RU switch.

Catalyst 3750 Switch Hardware Installation Guide

2-12

OL-6336-10

Chapter 2 Switch Installation

Catalyst 3750

SERIES

23X

24X

86819

126143

47X

48X

Catalyst 3750G

SERIES

Catalyst 3750

SERIES

97170

Figure 2-9 Removing Screws from the Catalyst 3750-24TS, 3750V2-24TS, 3750G-24T, 3750-24PS,

Figure 2-10 Removing Screws from the Catalyst 3750G-24TS-1U, 3750G-24PS, 3750G-48PS, and

Installing the Switch

3750V2-24PS, 3750-48TS, 3750-48PS, 3750V2-48PS, and 3750G-16TD Switch

3750G-48TS Switch

Figure 2-11 Removing Screws from the Catalyst 3750G-12S and 3750-12S-SD Switch

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

2-13

Installing the Switch

Catalyst 3750

SERIES

23X

24X

86820

Catalyst 3750G

SERIES

PoE-24

Wireless LAN Controller

13X

14X

23X

24X

25 26

141729

Chapter 2 Switch Installation

Figure 2-12 Removing Screws from the 3750G-24TS Switch

Figure 2-13 Removing Screws from the 3750G-24WS-S25 and the 3750G-24WS-S50 Switch

Attaching Brackets to the Catalyst 3750G-24TS 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.

Figure 2-14 through Figure 2-19 show how to attach each type bracket to one side of the switch. Follow

the same steps to attach the second bracket to the opposite side.

2-14

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 2 Switch Installation

SYST

RPS

MASTR

STAT

DUPLX

SPEED

STACK

MODE

13X

14X

11X

12X

86839

SYST

RPS

MASTR

STAT

DUPLX

SPEED

STACK

MODE

11X

12X

86557

Figure 2-14 Attaching Brackets for 19-inch Racks, Front Panel Forward

1 Phillips flat-head screws

Figure 2-15 Attaching Brackets for 24-Inch Racks, Front Panel Forward

Installing the Switch

1 Phillips flat-head screws

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

2-15

Installing the Switch

DC INPUTS FOR REMOTE

POWER SUPPLY

SPECIFIED IN MANUAL

+12v @17a

86555

DC INPUTS FOR REMOTE

POWER SUPPLY

SPECIFIED IN MANUAL

+12v @17a

86556

Catalyst 3750

SERIES

13X

14X

23X

24X

Chapter 2 Switch Installation

Figure 2-16 Attaching Brackets for 19-Inch Racks, Rear Panel Forward

1 Phillips flat-head screws

Figure 2-17 Attaching Brackets for 24-Inch Racks, Rear Panel Forward

1 Phillips flat-head screws

Figure 2-18 Attaching Brackets for 19-Inch Telco Racks

Catalyst 3750 Switch Hardware Installation Guide

2-16

OL-6336-10

Chapter 2 Switch Installation

Catalyst 3750

SERIES

13X

14X

23X

24X

86559

Catalyst 3750G

SERIES

PoE-24

Wireless LAN Controller

13X

14X

23X

24X

25 26

141730

1 Phillips flat-head screws

Figure 2-19 Attaching Brackets for 24-Inch Telco Racks

1 Phillips flat-head screws

Installing the Switch

Attaching Brackets to the Catalyst 3750G Integrated Wireless LAN Controller Switches

The wireless LAN controller switches can only be mounted on 19-inch racks. This section describes how to attach 19-inch brackets on the Catalyst 3750G-24WS-S25 and the 3750G-24WS-S50 switches.

Figure 2-20, Figure 2-21, and Figure 2-22 show how to attach the bracket to one side of the switch.

Follow the same steps to attach the second bracket to the opposite side. For 19-inch racks, use part number 700-21419-XX.

Figure 2-20 Attaching Brackets for 19-Inch Racks, Front Panel Forward

1 Phillips flat-head screws

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

2-17

Installing the Switch

DC INPUTS FOR REMOTE

POWER SUPPLY

SPECIFIED IN MA

NUAL

141731

SERVICE

Catalyst 3750G

SERIES

PoE-24

Wireless LAN Controller

13X

14X

23X

24X

25 26

141732

Chapter 2 Switch Installation

Figure 2-21 Attaching Brackets for 19-Inch Racks, Rear Panel Forward

Figure 2-22 Attaching Brackets for 19-Inch Telco Racks

1 Phillips flat-head screws

Attaching Brackets to All Other Catalyst 3750 Switches

This section describes how to attach brackets to these Catalyst 3750 switches:

• Catalyst 3750-24TS, 3750V2-24TS, and 3750G-24TS

• Catalyst 3750G-24T

• Catalyst 3750-24FS and Catalyst 3750V2-24FS

• Catalyst 3750G-12S and 3750G-12S-SD

• Catalyst 3750-24PS, 3750V2-24PS, and 3750G-24PS

• Catalyst 3750-48PS, 3750V2-48PS, and 3750G-48PS

• Catalyst 3750G-16TD

• Catalyst 3750-48TS, 3750V2-48TS, and 3750G-48TS

2-18

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 2 Switch Installation

132869

19 inch

ETSI

The bracket orientation and the brackets that you use depend on whether you are attaching the brackets for a 19-inch, a 23-inch, a 24-inch rack, or a ETSI rack. Figure 2-23 shows the bracket options.

Figure 2-23 Rack-Mounting Brackets

Installing the Switch

For 19-inch racks, use part number 700-08209-XX, and see Attaching Brackets for 19-Inch Racks

•

and 19-Inch Telco Racks, page 2-19.

• For 23-inch racks, use part number 700-21646-XX, and see Attaching Brackets for 23-Inch Racks,

page 2-21.

• For 24-inch racks, use part number 700-12398-XX, and see Attaching Brackets for 24-Inch Racks

and 24-Inch Telco Racks, page 2-22.

• For ETSI racks, use part number 700-19781XX, and see Attaching Brackets for ETSI Racks, page

2-23.

Attaching Brackets for 19-Inch Racks and 19-Inch Telco Racks

This section shows to attach brackets for 19-inch racks in Figure 2-24 through Figure 2-27. These illustrations 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.

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

2-19

Installing the Switch

SYST

RPS

MASTR

STAT

DUPLX

SPEED

STACK

MODE

11X

12X

86560

RATING

100-200V ~

1.6A-0>9A, 50-60 HZ

DC INPUTS FOR REMOTE

POWER SUPPLY

SPECIFIED IN MANUAL

+12v @8.5a

86562

Catalyst 3750

SERIES

97171

Chapter 2 Switch Installation

Figure 2-24 Attaching Brackets for 19-Inch Racks, Front Panel Forward

1 Phillips flat-head screws

Figure 2-25 Attaching Brackets for 19-Inch Racks, Rear Panel Forward

1 Phillips flat-head screws

Figure 2-26 Attaching Brackets for 19-Inch Racks

1 Phillips truss-head screws

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

2-20

Chapter 2 Switch Installation

Catalyst 3750

SERIES

13X

14X

23X

24X

11X

12X

86564

132968

MODE

RPS

STAT

DUPLX

SPEED

MASTR

STACK

SYST

132969

Figure 2-27 Attaching Brackets for 19-Inch Telco Racks

1 Phillips flat-head screws

Attaching Brackets for 23-Inch Racks

This section shows to attach brackets for 23-inch racks in Figure 2-28 and Figure 2-29. These illustrations 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.

Installing the Switch

Figure 2-28 Attaching Brackets for 23-Inch Racks, Front Panel Forward

1 Phillips flat-head screws

Figure 2-29 Attaching Brackets for 23-Inch Racks, Rear Panel Forward

1 Phillips flat-head screws

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

2-21

Installing the Switch

SYST

RPS

MASTR

STAT

DUPLX

SPEED

STACK

MODE

86561

RATING

100-200V ~

1.6A-0>9A, 50-60 HZ

DC INPUTS FOR REMOTE

POWER SUPPLY

SPECIFIED IN MANUAL

+12v @8.5a

86563

Attaching Brackets for 24-Inch Racks and 24-Inch Telco Racks

This section shows to attach brackets for ESTI racks in Figure 2-30, Figure 2-31, and Figure 2-32. These illustrations 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 2-30 Attaching Brackets for 24-Inch Racks, Front Panel Forward

Chapter 2 Switch Installation

1 Phillips flat-head screws

Figure 2-31 Attaching Brackets for 24-Inch Racks, Rear Panel Forward

1 Phillips flat-head screws

2-22

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 2 Switch Installation

Catalyst 3750

SERIES

13X

14X

23X

24X

11X

12X

132970

MODE

RPS

STAT

DUPLX

SPEED

MASTR

STACK

SYST

132971

Figure 2-32 Attaching Brackets for 24-Inch Telco Racks

1 Phillips flat-head screws

Attaching Brackets for ETSI Racks

This section shows to attach brackets for ESTI racks in Figure 2-33 and Figure 2-34. These illustrations 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.

Installing the Switch

Figure 2-33 Attaching Brackets for ESTI Racks, Front Panel Forward

1 Phillips flat-head screws

Figure 2-34 Attaching Brackets for ETSI Racks, Rear Panel Forward

OL-6336-10

1 Phillips flat-head screws

Catalyst 3750 Switch Hardware Installation Guide

2-23

Installing the Switch

Catalyst 3750

SERIES

SYST

RPS

MASTR

STAT

DUPLX

SPEED

STACK

MODE

13X

14X

23X

24X

11X

12X

86566

Catalyst 3750

SERIES

SYST

RPS

MASTR

STAT

DUPLX

SPEED

STACK

MODE

13X

14X

23X

24X

11X

12X

86567

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 2-35, Figure 2-36 and Figure 2-37.

Figure 2-35 Mounting the Catalyst 3750G-24TS Switch in a Rack

Chapter 2 Switch Installation

1 Phillips machine screws

Figure 2-36 Mounting the Other Catalyst 3750 Switches in a Rack

1 Phillips machine screws

Catalyst 3750 Switch Hardware Installation Guide

2-24

OL-6336-10

Chapter 2 Switch Installation

Catalyst 3750G

SERIES

PoE-24

Wireless LAN Controller

SYST RPS MASTR STAT DUPLX SPEED STACK PoE

11X

12X

13X

14X

23X

24X

141734

Installing the Switch

1 Phillips machine screws

After you mount the switch in the rack, you might need to perform these tasks to complete the installation, to run the setup program, and to access the switch:

Figure 2-37 Mounting the Catalyst 3750G-24WS-S25 and 3750G-24WS-S50 Switches in a Rack

• (Optional) Connect the switches in the stacks. See the “Connecting StackWise Cable to StackWise

Ports” section on page 2-30.

• Power on the switch. See the “Verifying Switch Operation” section on page 2-7. If the switches are

stacked, see the “Planning Considerations” section on page 2-8 for information on powering considerations.

• Connect to a 10/100 or 10/100/1000 port and run Express Setup. See the Catalyst 3750 Switch

Getting Started Guide for instructions.

• Connect to the front-panel ports. See the “Connecting to the 10/100 and 10/100/1000 Ports” section

on page 2-39 and the “Connecting to an SFP Module” section on page 2-41 to complete the

installation.

For configuration instructions about using the CLI setup program, go to Appendix D, “Configuring the

Switch with the CLI-Based Setup Program.”

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, see the switch software configuration guide or the switch command reference.

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

2-25

Installing the Switch

Catalyst 3750

SERIES

SYST

RPS

MASTR

STAT

DUPLX

SPEED

STACK

MODE

13X

14X

23X

24X

11X

12X

86568

Catalyst 3750

SERIES

SYST

RPS

MASTR

STAT

DUPLX

SPEED

STACK

MODE

17X

18X

33X

34X

15X

16X

31X

32X

47X

48X

86569

Attaching the Cable Guide

We recommend attaching the cable guide to prevent the cables from obscuring the front panel of the switch and the other devices installed in the rack. Use the supplied black screw, as shown in Figure 2-38,

Figure 2-39 and Figure 2-40 to attach the cable guide to the left or right bracket.

Figure 2-38 Attaching the Cable Guide on the 24-Port Catalyst 3750 Switches

Chapter 2 Switch Installation

1 Cable guide screws

Note The 48-port Catalyst 3750 switches ship with the cable guide shown in Figure 2-39. This cable guide

secures up to 48 cables. Use the supplied black screw to mount it on the left bracket.

Figure 2-39 Attaching the Cable Guide on the 48-Port Catalyst 3750 Switches

1 Cable guide screws

2-26

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 2 Switch Installation

Catalyst 3750G

SERIES

PoE-24

Wireless L

AN Controller

SYST RPS MASTR STAT DUPLX SPEED STACK PoE

11X

12X

13X

14X

23X

24X

141735

Figure 2-40 Attaching the Cable Guide on the Catalyst 3750 Integrated Wireless LAN Controller

Wall-Mounting

These switches wall-mount only with the front panel facing up:

Installing the Switch

Switches

1 Cable guide screws

• Catalyst 3750-24FS, Catalyst 3750V2-24FS

• Catalyst 3750-24TS, 3750-48TS, 3750-24PS, 3750-48PS

Warning

• Catalyst 3750G-12S, 3750G-12S-SD

• Catalyst 3750G-24T, 3750G-24TS, 3750G-24TS-1U

• Catalyst 3750G-24PS, 3750G-48PS

• Catalyst 3750G-16TD

These switches wall-mount with the front panel facing up or down:

• Catalyst 3750V2-24TS, 3750V2-48TS

• Catalyst 3750V2-24PS, 3750V2-48PS

These switches do not support wall-mounting. Do not wall-mount these switches:

• Catalyst 3750G-24WS-S25

• Catalyst 3750G-24WS-S50

The illustrations in this section show the Catalyst 3750G-24TS switch as an example.

Statement 378

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

• Attaching the Brackets to the Switch for Wall-Mounting, page 2-28

• Attaching the RPS Connector Cover, page 2-28

• Mounting the Switch on a Wall, page 2-29

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

2-27

Installing the Switch

Catalyst 3750

SERIES

23X

24X

86687

CONSOLE

STACK 1

STACK 2

DC INPUTS FOR REM

OTE

POWER SUPPLY

SPECIFIED IN M

ANUAL

+12v @

8.5a

21 3

86571

Attaching the Brackets to the Switch for Wall-Mounting

Figure 2-41 shows how to attach a 19-inch bracket to one side of the switch. Follow the same steps to

attach the second bracket to the opposite side.

Chapter 2 Switch Installation

1 Phillips truss-head screws

Attaching the RPS Connector Cover

If you are not using an RPS with your switch, use the two Phillips pan-head screws to attach the RPS connector cover to the back of the switch, as shown in Figure 2-42.

Figure 2-41 Attaching the 19-inch Brackets for Wall-Mounting

Warning

If an RPS is not connected to the switch, install an RPS connector cover on the back of the switch.

Statement 265

Figure 2-42 Attaching the RPS Connector Cover on the Switch

1 Phillips pan-head screws 3 RPS connector

2 RPS connector cover

2-28

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 2 Switch Installation

Catalyst 3750

SERIES

SYST

RPS

MASTR

STAT

DUPLX

SPEED

STACK

13X

14X

23X

24X

11X

12X

86570

Mounting the Switch on a Wall

For the best support of the switch and cables, make sure 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 2-43.

See the “Wall-Mounting” section on page 2-27 for the switches that can also mount with the front panel facing down.

Installing the Switch

Warning

Figure 2-43 Mounting the Switch on a Wall

Statement 378

1 User-supplied screws

OL-6336-10

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

• (Optional) Connect the switches in the stacks. See the “Connecting StackWise Cable to StackWise

Ports” section on page 2-30.

• Power on the switch. See the “Verifying Switch Operation” section on page 2-7. If the switches are

stacked, see the “Planning Considerations” section on page 2-8 for information on powering considerations.

• Connect to a 10/100 or 10/100/1000 port and run Express Setup. See the Catalyst 3750 Switch

Getting Started Guide for instructions.

Catalyst 3750 Switch Hardware Installation Guide

2-29

Connecting StackWise Cable to StackWise Ports

• Connect to the front-panel ports. See the “Connecting to the 10/100 and 10/100/1000 Ports” section

on page 2-39 and the “Connecting to an SFP Module” section on page 2-41 to complete the

installation.

For configuration instructions about using the CLI setup program, go to Appendix D, “Configuring the

Switch with the CLI-Based Setup Program.”

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 the recessed areas 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:

• (Optional) Connect the switches in the stacks. See the “Connecting StackWise Cable to StackWise

Ports” section on page 2-30.

• Power on the switch. See the “Verifying Switch Operation” section on page 2-7. If the switches are

stacked, see the “Planning Considerations” section on page 2-8 for information on powering considerations.

Chapter 2 Switch Installation

• Connect to a 10/100 or 10/100/1000 port and run Express Setup. See the Catalyst 3750 Switch

Getting Started Guide for instructions.

• Connect to the front-panel ports. See the “Connecting to the 10/100 and 10/100/1000 Ports” section

on page 2-39 and the “Connecting to an SFP Module” section on page 2-41 to complete the

installation.

For configuration instructions about using the CLI setup program, go to Appendix D, “Configuring the

Switch with the CLI-Based Setup Program.”

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

Connecting StackWise Cable to StackWise Ports

Follow these steps to connect the StackWise cable to the StackWise ports:

Step 1 Remove the dust covers from the StackWise cables and StackWise ports, and store them for future use.

Step 2 Insert one end of the StackWise cable into the StackWise port on the back of the switch.

(See Figure 2-44.)

2-30

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 2 Switch Installation

CONSOLE

STACK 1

STACK 2

132362

Note Always use a Cisco-approved StackWise cable to connect the switches.

Figure 2-44 Inserting the StackWise Cable in a StackWise Port

Connecting StackWise Cable to StackWise Ports

Step 3

Use the window in the StackWise cable to align the connector correctly. Secure the screws tightly.

Step 4 Insert the other end of the cable into the connector of the other switch, and secure the screws tightly.

Caution Removing and installing the StackWise cable can shorten its useful life. Do not remove and

insert the cable more often than is absolutely necessary.

Replace the dust covers on the connectors to protect them from dust when you are not using them.

When you need to remove the StackWise cable from the connector, make sure to fully unscrew the screws before removing the connector. Make sure that you also remove the correct screws from the StackWise port.

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

2-31

Connecting StackWise Cable to StackWise Ports

CONSOLE

STACK 1

STACK 2

86826

CONSOLE

STACK 1

STACK 2

86827

Figure 2-45 shows the correct removal procedure.

Figure 2-45 Correct Removal of the StackWise Cable from a StackWise Port

Chapter 2 Switch Installation

Caution Do not remove the cable by using the procedure shown in Figure 2-46.

Figure 2-46 Incorrect Removal of a StackWise Cable from a StackWise Port

2-32

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 2 Switch Installation

86575

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 Catalyst 3750 switches. These field-replaceable modules provide uplink interfaces.

You can use any combination of SFP modules. See the Catalyst 3750 release notes for the list of SFP modules that the Catalyst 3750 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 the “Installation Guidelines” section on page 2-6 for cable stipulations for SFP connections.

Use only Cisco SFP modules on the Catalyst 3750 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, see your SFP module documentation.

Installing SFP Modules into SFP Module Slots

Installing and Removing SFP Modules

Figure 2-47 shows 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.

Figure 2-47 SFP Module with a Bale-Clasp Latch

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

OL-6336-10

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).

Catalyst 3750 Switch Hardware Installation Guide

2-33

Installing and Removing SFP Modules

Catalyst 3750

SERIES

13X

14X

97169

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.

Figure 2-48 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 later cable.

Removing SFP Modules from SFP Module Slots

To remove an SFP module from a 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 Disconnect the cable from the SFP module.

2-34

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

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 2 Switch Installation

Catalyst 3750

SERIES

23X

24X

86554

Step 3 Unlock and remove the SFP module, as shown in Figure 2-49.

If the module has a bale-clasp latch, pull the bale 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 instrument to open the bale-clasp latch.

Figure 2-49 Removing a Bale-Clasp Latch SFP Module by Using a Flat-Blade Screwdriver

Installing and Removing XENPAK Modules (Catalyst 3750G-16TD Switch)

1 Bale clasp

Warning

When the Catalyst 3750-12S switch and 100BASE-FX MMF small form-factor pluggable (SFP) module (model number GLC-GE-100FX) are running, the surface temperature of the removed SFP module might be hot.

Statement 377

Step 4 Grasp the SFP module between your thumb and index finger, and carefully remove it from the

module slot.

Step 5 For fiber-optic SFP modules, insert a dust plug into the optical ports of the SFP module to keep the

optical interfaces clean.

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

Installing and Removing XENPAK Modules (Catalyst 3750G-16TD Switch)

These sections describe how to install and remove XENPAK modules:

• Removing SFP Modules from SFP Module Slots, page 2-34

• Removing a XENPAK Module, page 2-38

XENPAK modules are inserted into the XENPAK module slot on the front panel of the Catalyst 3750G-16TD switch. These field-replaceable transceiver modules provide 10-Gigabit interfaces.

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

2-35

Installing and Removing XENPAK Modules (Catalyst 3750G-16TD Switch)

99376

Note The 10-Gigabit Ethernet XENPAK modules are referred to as 10-Gigabit Ethernet module ports in the

switch software documentation.

See the Catalyst 3750 release notes for the list of XENPAK modules that the Catalyst 3750G-16TD switch supports. Use only Cisco XENPAK modules on the Catalyst 3750G-16TD switch. Each XENPAK 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 XENPAK module meets the requirements for the switch.

See Table B-2 on page B-4 for cable requirements for XENPAK module connections. For detailed instructions on installing, removing, cabling, and troubleshooting the XENPAK module, see your XENPAK module documentation.

Installing a XENPAK Module

Figure 2-50 shows a XENPAK module.

Chapter 2 Switch Installation

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

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

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

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

Figure 2-50 XENPAK Module

1 Captive installation screw 3 Sending optical bore

2 Optical bore dust plug 4 Receiving optical bore

2-36

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 2 Switch Installation

Catalyst 3750

series

104764

Catalyst 3750

series

104573

To insert a XENPAK module, 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 Remove the two Phillips-head retaining screws from the XENPAK module slot cover, and store them for

later use.

Step 3 Remove the cover, as shown in Figure 2-51.

Figure 2-51 Removing the XENPAK Module Slot Cover

Installing and Removing XENPAK Modules (Catalyst 3750G-16TD Switch)

1 Phillips-head screw 2 Module slot cover

Step 4 Remove the XENPAK module from the protective packaging.

Step 5 Align the XENPAK module with the guide rails inside the module slot, and slide the module into the

opening until the back of the XENPAK faceplate is flush with the switch faceplate. (See Figure 2-52.)

Figure 2-52 Installing a XENPAK Module in the Catalyst 3750G-16TD Switch

1 Optical bore dust plug 2 Captive installation screw

Step 6

Secure the XENPAK module in place by tightening the two captive installation screws. Do not overtighten the captive screws.

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

2-37

Installing and Removing XENPAK Modules (Catalyst 3750G-16TD Switch)

Catalyst 3750

series

104574

Removing a XENPAK Module

To remove a XENPAK module, 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 XENPAK module. For fiber-optic modules, install the optical bore dust

plugs.

Step 3 Loosen the two captive installation screws that secure the XENPAK module in the slot.

Step 4 Carefully pull on the two captive installation screws to disconnect the XENPAK module from the slot.

Step 5 Grasp the edges of the XENPAK module, and carefully slide it out of the slot, as shown in Figure 2-53.

Figure 2-53 Removing a XENPAK Module

Chapter 2 Switch Installation

Step 6

Warning

1 Optical bore dust plug 2 Captive installation screw

Use two Phillips-head screws to attach the XENPAK module slot cover to the switch front panel, as shown in Figure 2-54.

Statement 156

Catalyst 3750 Switch Hardware Installation Guide

2-38

OL-6336-10

Chapter 2 Switch Installation

Catalyst 3750

series

104765

Figure 2-54 Replacing the XENPAK Module Slot Cover

1 Phillips-head screw 2 Module slot cover

Connecting to the 10/100 and 10/100/1000 Ports

The switch 10/100 and 10/100/1000 ports configure themselves to operate at the speed of attached devices. If the attached ports do not support autonegotiation, you can explicitly 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.

Warning

You can configure the 10/100 and 10/100/1000 PoE ports on the switch to either automatically provide PoE when a Cisco IP Phone, Cisco Aironet Access Point, or end device compliant with IEEE 802.3af is connected. Alternatively, you can configure them to never provide PoE, even if an IP phone or an access point is connected. The default setting is Auto. To prevent ESD damage, follow your normal board and component handling procedures.

Statement 1072

OL-6336-10

Use the guidelines in Tab le 2- 1 to select the correct cable for connecting the switch 10/100 and 10/100/1000 ports to other devices. See the “Cable and Adapter Specifications” section on page B-5 for cable-pinout descriptions.

Catalyst 3750 Switch Hardware Installation Guide

2-39

Connecting to the 10/100 and 10/100/1000 Ports

Table 2-1 Recommended Ethernet Cables

Chapter 2 Switch Installation

Device Crossover Cable

Straight-Through Cable

Switch to switch Yes No

Switch to hub Yes No

Switch to computer

No Yes

or server

Switch to router No Yes

Switch to IP phone No Yes

1. 100BASE-TX and 1000BASE-T traffic requires twisted four-pair, Category 5 or higher cable. 10BASE-T traffic can use Category 3 or Category 4 cable.

You can use the mdix auto interface configuration command in the CLI to enable the automatic medium-dependent interface crossover (auto-MDIX) feature. When the auto-MDIX feature is enabled, the switch detects the required cable type for copper Ethernet connections and configures the interfaces accordingly. Therefore, you can use either a crossover or a straight-through cable for connections to a copper 10/100, 10/100/1000, or 1000BASE-T SFP module port on the switch, regardless of the type of device on the other end of the connection.

Follow these steps to connect to 10BASE-T, 100BASE-TX or 1000BASE-T devices:

Caution PoE faults are caused when noncompliant cabling or powered devices are connected to a PoE port. Only

standard-compliant cabling can be used to connect Cisco pre-standard IP Phones and wireless access points or IEEE 802.3af-compliant devices to PoE ports. A cable or device that causes a PoE fault must be removed from the network.

Step 1 When you connect the switch to workstations, servers, routers, and Cisco IP Phones, connect a

straight-through cable to an RJ-45 connector on the front panel. (See Figure 2-55.) When you connect the switch to other switches or to repeaters, use a crossover cable. (See the “Cable and Adapter

Specifications” section on page B-5 for cable-pinout descriptions.)

When you connect a switch to 1000BASE-T-compatible devices, be sure to use a twisted four-pair, Category 5 or later cable.

You can connect the Catalyst 3750 switch to a Cisco IP Phone through a straight-through, twisted four-pair Category 5 or later cable. The rear panel of the Cisco IP Phone might have more than one RJ-45 connector. Use the LAN-to-phone connector to connect the Cisco IP phone to the switch. See the Cisco IP Phone documentation for more information about connecting devices to it.

Note Many legacy powered devices, including older Cisco IP phones and access points that do not

fully support IEEE 802.3af, might not support PoE when connected to the switches by a crossover cable.

2-40

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 2 Switch Installation

SYST

RPS

MASTR

STAT

DUPLX

SPEED

STACK

MODE

11X

12X

86818

Step 2 Connect the other end of the cable to an RJ-45 connector on the other device. The port LED turns on

when both the switch and the connected device have established link.

The port LED is amber while Spanning Tree Protocol (STP) discovers the topology and searches for loops. This process takes about 30 seconds, and then the port LED turns green. If the port LED does not turn on, the device at the other end might not be turned on, or there might be a cable problem or a problem with the adapter installed in the attached device. See Chapter 3, “Troubleshooting,” for solutions to cabling problems.

Step 3 Reconfigure and reboot the connected device if necessary.

Step 4 Repeat Steps 1 through 3 to connect each device.

Figure 2-55 Connecting to an Ethernet Port

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 1000BASE-T

SFP Modules” section.

• For instructions on how to connect to 1000BASE-T SFP modules, see the “Connecting to

1000BASE-T SFP Modules” section.

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

Modules” section on page 2-33.

Connecting to a Fiber-Optic SFP Module

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

OL-6336-10

Warning

Class 1 laser product.

Statement 1008

Catalyst 3750 Switch Hardware Installation Guide

2-41

Connecting to an SFP Module

Catalyst 3750

SERIES

13X

14X

23X

24X

86550

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 the switch to the SFP module, be sure that you understand the port and cabling stipulations in “Installation Guidelines” section on page 2-6 and in the “SFP Module Slots” section on

page 1-12.

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 2-56).

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

Step 4 Observe the port status LED.

• 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

Chapter 2 Switch Installation

process takes about 30 seconds, and then the port LED turns green.

Step 5

• 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 3, “Troubleshooting,” for solutions to cabling problems.

Figure 2-56 Connecting to an SFP Module Port

1 LC connector

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

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

2-42

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 2 Switch Installation

Catalyst 3750

SERIES

13X

14X

23X

24X

97348

Connecting to 1000BASE-T SFP Modules

Follow these steps to connect a Category 5 cable to a 1000BASE-T SFP module port (see Figure 2-57):

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

Step 1 When you connect the switch to servers, workstations, and routers, insert a four twisted-pair,

straight-through cable in the RJ-45 connector. When you connect the switch to other switches or repeaters, insert a four twisted-pair, crossover cable.

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

higher cable.

Figure 2-57 Connecting to an SFP Module Port

Connecting to an SFP Module

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.

• 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 3, “Troubleshooting,” for solutions to cabling problems.

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

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

2-43

Connecting to a XENPAK Module

The 10-Gigabit Ethernet XENPAK modules are referred to as 10-Gigabit Ethernet module ports in the switch software documentation.

Make sure that the XENPAK module is fully inserted into the module slot and that the captive installation screws are fully tightened before attaching the fiber-optic interface cable connector to the XENPAK module connector.

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

Chapter 2 Switch Installation

Warning

Caution Do not remove the rubber plugs from the XENPAK module ports or the rubber caps from the fiber-optic

Class 1 laser product.

Statement 1008

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

Step 1 Remove the rubber plugs from the XENPAK module ports and the fiber-optic cable, and store them for

future use.

Step 2 Align the fiber-optic cable SC connector with the XENPAK module connector, so that transmit (TX) on

the cable meets receive (RX) on the XENPAK module connector, and RX on the cable meets TX on the XENPAK module.

Step 3 Insert the fiber-optic cable connector into the XENPAK module ports (see Figure 2-58).

Step 4 Insert the other cable end into a fiber-optic receptacle on a target device.

Step 5 Observe the XENPAK module port status LED.

• 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 3, “Troubleshooting,” for solutions to cabling problems.

2-44

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 2 Switch Installation

Catalyst 3750

series

104575

Figure 2-58 Connecting to a XENPAK Module Port

1 SC connector

Where to Go Next

Step 6 If necessary, reconfigure and restart the switch or target device.

Where to Go Next

If the default configuration is satisfactory, the switch needs no further configuration. You can use any of these management options to change the default configuration:

• Start the device manager, which is in the switch memory, to manage individual and standalone

switches. This is an easy-to-use web interface that offers quick configuration and monitoring. You can access the device manager from anywhere in your network through a web browser. For more information, see the device manager online help.

• Start the Network Assistant application, which is described in the Getting Started with Cisco

Network Assistant guide. Through this GUI, you can configure and monitor a switch cluster or an

individual switch.

• Use the CLI to configure the switch as a member of a cluster or as an individual switch from the

console. See the Catalyst 3750 Switch Command Reference on Cisco.com for information on using

the CLI with a Catalyst 3750 switch.

• Start an SNMP application such as the CiscoView application.

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

2-45

Where to Go Next

Chapter 2 Switch Installation

2-46

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

CHA P 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 1-13.

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 3-1

• Clearing the Switch IP Address and Configuration, page 3-6

• Replacing a Failed Stack Member, page 3-6

• Finding the Switch Serial Number, page 3-7

Diagnosing Problems

The LEDs on the front panel provide troubleshooting information about the switch. They show power-on self-test (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 3-2

• “Monitor Switch LEDs” section on page 3-2

• “Verify Switch Connections” section on page 3-2

• “Monitor Switch Performance” section on page 3-5

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

3-1

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 1-13 for a description of the LED colors and their meanings.

Chapter 3 Troubleshooting

Verify Switch Connections

Review this section when troubleshooting switch connectivity problems.

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.

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.

3-2

• 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, “Cable and

Adapter Specifications.”

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 3 Troubleshooting

Link Status

Diagnosing Problems

• 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.

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.

• 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, “Cable and Adapter

Specifications,” for more information.

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

reconnect the cable.

PoE Connections

When a powered device is connected to PoE port, but no power is received, you should:

• Use the Mode button to show the PoE status for all ports. See Table 1-5 on page 1-17 for a

description of the LEDs and their meanings.

• Monitor the port status by using the show interfaces privileged EXEC command to check the port

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

• Verify that the power supply installed in the switch meets the power requirements of your connected

devices. See the “Power Connectors” section on page 1-25 for more information.

• Check the cable type. Many legacy powered devices, including older Cisco IP phones and access

points that do not fully support IEEE 802.3af, might not support PoE when connected to the switch by a crossover cable. Replace the crossover cable with a straight-through cable.

Caution PoE faults are caused when noncompliant cabling or powered devices are connected to a PoE port. Only

standard-compliant cabling can be used to connect Cisco pre-standard IP phones and wireless access points or IEEE 802.3af-compliant devices to PoE ports. (You must remove a cable or device that causes a PoE fault from the network.)

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 “SFP Module Slots” section on page 1-12 for a list of supported SFP modules.

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

3-3

Diagnosing Problems

• Bad or incorrect XENPAK module. Replace the suspect module with a known good module. Verify

that the platform supports the module. See the Table B-2 on page B-4 for a list of supported XENPAK 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

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. 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

Chapter 3 Troubleshooting

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.

3-4

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 3 Troubleshooting

Monitor Switch Performance

Review this section when you troubleshoot switch performance problems.

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.

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:

Diagnosing Problems

• 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

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.

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

3-5

Clearing the Switch IP Address and Configuration

If you have configured a new switch with an incorrect IP address, or if all of the switch LEDs start blinking when you try to enter Express Setup mode, 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 (see Figure 1-16 on page 1-14, Figure 1-16 on page 1-14, and

Figure 1-17 on page 1-14).

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.

Chapter 3 Troubleshooting

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 D,

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

Replacing a Failed Stack Member

If you need to replace a failed stack member, you can hot swap or replace the switch by following this procedure:

Step 1 Get a replacement switch that has the same model number as the failed switch.

Step 2 Power off the failed switch.

Step 3 Make sure the replacement switch is powered off, and then connect the replacement switch to the stack.

Note If you had previously manually set the member numbers for any members in the stack, you need

to manually assign the replacement switch with the same member number as the failed switch. To assign the member number manually, see the switch software configuration guide.

3-6

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 3 Troubleshooting

Step 4 Make the same Ethernet and Gigabit Ethernet connections on the replacement switch (as were on the

failed switch).

Step 5 Power on the replacement switch.

Note If you add a replacement switch that has a later Cisco IOS release to the running stack, the replacement

switch automatically downgrades to the release that the stack is running. The replacement switch, rather than the existing switches, reboots. The replacement switch then has the same configuration for all the interfaces as those of the failed switch.

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.

Finding the Switch Serial Number

• Figure 3-1, Catalyst 3750-24FS and 3750V2-24FS Switch Serial Number Location

• Figure 3-2, Catalyst 3750G-12S and 3750-12S-SD Switch Serial Number Location

• Figure 3-3, Catalyst 3750G-16TD Switch Serial Number Location

• Figure 3-4, Catalyst 3750-24PS Switch Serial Number Location

• Figure 3-5, Catalyst 3750G-24PS and 3750G-24TS-1U Switches Serial Number Location

• Figure 3-6, Catalyst 3750G-24TS Switch Serial Number Location

• Figure 3-7, Catalyst 3750-24TS and 3750V2-24TS Switch Serial Number Location

• Figure 3-8, Catalyst 3750-24PS and 3750V2-24PS Switch Serial Number Location

• Figure 3-9, Catalyst 3750G-24WS Switch Serial Number Location

• Figure 3-10, Catalyst 3750-48PS and 3750V2-48PS Switch Serial Number Location

• Figure 3-11, Catalyst 3750G-48PS and 3750G-48TS Switches Serial Number Location

• Figure 3-12, Catalyst 3750-48TS and 3750V2-48TS Switch Serial Number Location

Figure 3-1 Catalyst 3750-24FS and 3750V2-24FS Switch Serial Number Location

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

3-7

Finding the Switch Serial Number

Figure 3-2 Catalyst 3750G-12S and 3750-12S-SD Switch Serial Number Location

Figure 3-3 Catalyst 3750G-16TD Switch Serial Number Location

Chapter 3 Troubleshooting

Figure 3-4 Catalyst 3750-24PS Switch Serial Number Location

Figure 3-5 Catalyst 3750G-24PS and 3750G-24TS-1U Switches Serial Number Location

3-8

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 3 Troubleshooting

Figure 3-6 Catalyst 3750G-24TS Switch Serial Number Location

Figure 3-7 Catalyst 3750-24TS and 3750V2-24TS Switch Serial Number Location

Finding the Switch Serial Number

Figure 3-8 Catalyst 3750-24PS and 3750V2-24PS Switch Serial Number Location

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

3-9

Finding the Switch Serial Number

CONSOLE

DC INPUTS FOR REMOTE

POWER SUPPLY

SPECIFIED IN MANUAL

119952, 781-00290-01

STACK 1

STACK 2

SN: XXXNNNNXXXX

Figure 3-9 Catalyst 3750G-24WS Switch Serial Number Location

Figure 3-10 Catalyst 3750-48PS and 3750V2-48PS Switch Serial Number Location

Chapter 3 Troubleshooting

Figure 3-11 Catalyst 3750G-48PS and 3750G-48TS Switches Serial Number Location

3-10

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Chapter 3 Troubleshooting

Figure 3-12 Catalyst 3750-48TS and 3750V2-48TS Switch Serial Number Location

Finding the Switch Serial Number

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

3-11

Finding the Switch Serial Number

Chapter 3 Troubleshooting

3-12

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

APPENDIX

Technical Specifications

This appendix lists the switch technical specifications in these tables:

• Specifications for the Catalyst 3750G-12S Switch, Table A-1 on page A-2

• Specifications for the Catalyst 3750G-12S-SD Switch, Table A-2 on page A-2

• Specifications for the Catalyst 3750-24FS Switch, Table A-3 on page A-3

• Specifications for the Catalyst 3750-24TS Switch, Table A-4 on page A-3

• Specifications for the Catalyst 3750G-24T Switch, Table A-5 on page A-4

• Specifications for the Catalyst 3750-24PS Switch, Table A-6 on page A-4

• Specifications for the Catalyst 3750G-24PS Switch, Table A-7 on page A-5

• Specifications for the Catalyst 3750-48PS Switch, Table A-8 on page A-5

• Specifications for the Catalyst 3750G-48PS Switch, Table A-9 on page A-6

• Specifications for the Catalyst 3750G-16TD Switch, Table A-10 on page A-6

• Specifications for the Catalyst 3750G-24TS Switch, Table A-11 on page A-7

• Specifications for the Catalyst 3750G-24TS-1U Switch, Table A-12 on page A-7

• Specifications for the Catalyst 3750-48TS Switch, Table A-13 on page A-8

• Specifications for the Catalyst 3750G-48TS Switch, Table A-14 on page A-8

• Specifications for the Catalyst 3750G-24WS-S25 and 3750G-24WS-S50 Switch, Table A-14 on

page A-8

• Specifications for the Catalyst 3750V2-48PS and 3750V2-24PS Switch, Table A-16 on page A-9

• Specifications for the Catalyst 3750V2-48TS and 3750V2-24TS Switch, Table A-17 on page A-10

• Specifications for the Catalyst 3750V2-24FS Switch, Table A-18 on page A-11

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

A-1

Table A-1 Specifications for the Catalyst 3750G-12S 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)

Power Requirements

AC input voltage 100 to 240 VAC (autoranging)

0.6 to 1.2 A, 50 to 60 Hz

DC input voltages for RPS 2300 and 675

Power consumption 120 W, 409 BTUs per hour

Power rating 0.120 kVA

Physical Dimensions

Weight 10 lb (4.6 kg)

Dimensions (H x W x D) 1.73 x 17.5 x 12.8 in. (4.4 x 44.5 x 32.6 cm)

+12 V @13 A

Appendix A Technical Specifications

Table A-2 Specifications for the Catalyst 3750G-12S-SD 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)

Power Requirements

DC input voltage –36 to –72 VDC

3 to 1.5 A

Power consumption 94 W, 321 BTUs per hour

Physical Dimensions

Weight 10 lb (4.6 kg)

Dimensions (H x W x D) 1.73 x 17.5 x 12.8 in. (4.4 x 44.5 x 32.6 cm)

A-2

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Appendix A Technical Specifications

Table A-3 Specifications for the Catalyst 3750-24FS 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)

Power Requirements

AC input voltage 100 to 240 VAC (autoranging)

DC input voltages for RPS 2300 and 675

Power consumption 70 W, 240 BTUs per hour

Power rating 0.070 kVA

Physical Dimensions

Weight 9 lb (4.1 kg)

Dimensions (H x W x D) 1.73 x 17.5 x 11.8 in. (4.4 x 44.5 x 30.1 cm)

1.5 to 3 A, 50 to 60 Hz

+12 V @8.5 A

Table A-4 Specifications for the Catalyst 3750-24TS 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)

Power Requirements

AC input voltage 100 to 240 VAC (autoranging)

0.6 to 1.2 A, 50 to 60 Hz

DC input voltages for

+12 V @8.5 A

RPS 2300 and 675

Power consumption 50 W, 171 BTUs per hour

Power rating 0.083 kVA

Physical Dimensions

Weight 8 lb (3.6 kg)

Dimensions (H x W x D) 1.73 x 17.5 x 11.8 in. (4.4 x 44.5 x 30.1 cm)

OL-6336-10

Catalyst 3750 Switch Hardware Installation Guide

A-3

Table A-5 Specifications for the Catalyst 3750G-24T 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)

Power Requirements

AC input voltage 100 to 240 VAC (autoranging)

0.9 to 1.6 A, 50 to 60 Hz

DC input voltages for RPS 2300 and 675

Power consumption 165 W, 563 BTUs per hour

Power rating 0.165 kVA

Physical Dimensions

Weight 10 lb (4.6 kg)

Dimensions (H x W x D) 1.73 x 17.5 x 12.8 in. (4.4 x 44.5 x 32.6 cm)

+12 V @13 A

Appendix A Technical Specifications

Table A-6 Specifications for the Catalyst 3750-24PS 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)

Power Requirements

AC input voltage 100 to 240 VAC (autoranging)

2.9 to 5.5 A, 50 to 60 Hz

DC input voltage for RPS

+12 V @7.5 A and –48 V @7.8 A

2300 and 675

Power consumption 495 W

Power dissipation 125 W, 426 BTUs per hour

Power rating 0.495 kVA

Power over Ethernet

15.4 W per port maximum, 370 W switch maximum

Physical Dimensions

Weight 11.3 lb (5.1 kg)

Dimensions (H x W x D) 1.73 x 17.5 x 11.8 in. (4.4 x 44.5 x 30.1 cm)

A-4

Catalyst 3750 Switch Hardware Installation Guide

OL-6336-10

Cisco Catalyst 3750 V2 IP Base Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Audience

Purpose

Preface

Conventions

Related Publications

Obtaining Documentation, Obtaining Support, and Security Guidelines

Features

Product Overview

Front Panel Description

Fast Ethernet Switches

Catalyst 3750-24FS and 3750V2-24FS Switch Front Panel

Catalyst 3750-24TS and 3750V2-24TS Switch Front Panel

Catalyst 3750-48TS and 3750V2-48TS Switch Front Panel

Catalyst 3750-24PS and 3750V2-24PS Switch Front Panel

Catalyst 3750-48PS and 3750V2-48PS Switch Front Panel

Gigabit Ethernet Switches

Catalyst 3750G-12S and Catalyst 3750G-12S-SD Switch Front Panel

Catalyst 3750-24T, 3750G-24TS, and 3750G-24TS-1U Switch Front Panel

Catalyst 3750G-48TS Switch Front Panel

Catalyst 3750G-24PS Switch Front Panel

Catalyst 3750G-48PS Switch Front Panel

Catalyst 3750G-16TD Switch Front Panel

10/100 and 10/100/1000 Ports

Catalyst 3750G Integrated Wireless LAN Controller Switch Front Panel

100BASE-FX Ports

SFP Module Slots

SFP Modules

XENPAK Module Slot (Catalyst 3750G-16TD Switch)

LEDs

System LED

RPS LED

Master LED

Port LEDs and Modes

Rear Panel Description

StackWise Ports

Power Connectors

Internal Power Supply Connector

DC Power Connector

Cisco RPS Connector

Management Options

Console Port

Network Configurations

Switch Installation

Preparing for Installation

Warnings

Installation Guidelines

Box Contents

Tools and Equipment

Verifying Switch Operation

Powering On the Switch and Running POST

Planning the Stack

Powering Off the Switch

Planning Considerations

Powering Considerations

Cabling Considerations

Recommended Cabling Configurations

Installing the Switch

Rack-Mounting

Removing Screws from the Switch

Attaching Brackets to the Catalyst 3750G-24TS Switch

Attaching Brackets to the Catalyst 3750G Integrated Wireless LAN Controller Switches

Attaching Brackets to All Other Catalyst 3750 Switches

Mounting the Switch in a Rack

Attaching the Cable Guide

Wall-Mounting

Attaching the Brackets to the Switch for Wall-Mounting

Attaching the RPS Connector Cover

Mounting the Switch on a Wall

Connecting StackWise Cable to StackWise Ports

Table- or Shelf-Mounting

Installing and Removing SFP Modules

Installing SFP Modules into SFP Module Slots

Removing SFP Modules from SFP Module Slots

Installing and Removing XENPAK Modules (Catalyst 3750G-16TD Switch)

Installing a XENPAK Module

Removing a XENPAK Module