Cisco WS-C2960+24LC-S User Manual

Catalyst 2960 Switch Hardware Installation Guide

March 2010

Revised: April 2013

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Text Part Number: OL-7075-09

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The following inform ation 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.

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Catalyst 2960 Switch Hardware Installation Guide

CONTENTS

CHAPTER

Preface

Product Overview

vii

1-1

Features

Front Panel Description

1-1

1-4

Catalyst 2960 Switch 24- and 48-Port Switches

1-4

Catalyst 2960-24-S, 2960-Plus 24TC-S, 2960-24TC-S, 2960-Plus 48TC-S, 2960-48TC-S, and 2960-48TT-S Switches

1-5

Catalyst 2960-Plus 24PC-L, 2960-24PC-L, 2960-Plus 24PC-S, 2960-24PC-S, 2960-Plus 24LC-L, 2960-Plus 24LC-S, 2960-24LC-S, 2960-Plus 24TC-L, 2960-24TC-L, 2960-Plus 48TC-L, 2960-48TC-L, 2960-24LT-L, 2960-24TT-L, 2960-48TT-L, 2960-Plus 48PST-L, 2960-48PST-L, 2960-Plus 48PST-S, and 2960-48PST-S Switches

Catalyst 2960G-24TC-L and Catalyst 2960G-48TC-L Switches

Catalyst 2960 8-Port Switches

Catalyst 2960PD-8TT-L Switch

1-9

Catalyst 2960-8TC-S, Catalyst 2960-8TC-L, and Catalyst 2960G-8TC -L Switches 10/100 Ports 10/100/1000 Ports PoE Ports (Only Catalyst 2960 PoE Switches) SFP Module Slots Dual-Purpose Port

1-11

1-12

1-13

Power Input Port (Catalyst 2960PD-8TT-L Switch) LEDs

1-14

System LED

RPS LED

1-15

1-16

Port LEDs and Modes

Dual-Purpose Port LEDs

1-16

1-18

Cable Guard for the Catalyst 2960 8-Port Switches

1-6

1-9

1-10

1-14

1-19

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Rear Panel Description

Internal Power Supply Cisco RPS

1-20

Cisco RPS 2300

Cisco RPS 675 Console Port

1-21

Security Slots

1-19

1-20

1-21

Catalyst 2960 Switch Hardware Installation Guide

iii

Contents

CHAPTER

Management Options

Network Configurations

Switch Installation (24- and 48-Port Switches)

Preparing for Installation

Warnings Guidelines for Particulate Matter Installation Guidelines Box Contents Tools and Equipment

Verifying Switch Operation

Installing the Switch

Rack-Mounting

Removing Screws from the Switch Attaching Brackets to the Catalyst 2960 Switch 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

Table- or Shelf-Mounting

1-22

2-1

2-2

2-4

2-5

2-6

2-7

2-10

2-11

2-12

2-13

2-14

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

Installing and Removing SFP Modules

Installing SFP Modules Removing SFP Modules

Connecting to SFP Modules

2-16

2-17

2-18

Connecting to Fiber-Optic SFP Modules

2-15

2-18

Connecting to 1000BASE-T SFP Modules

Connecting to a Dual-Purpose Port

Where to Go Next

2-21

2-20

2-14

2-19

Catalyst 2960 Switch Hardware Installation Guide

OL-7075-09

Contents

CHAPTER

Switch Installation (8-Port Switches)

Preparing for Installation

Warnings

3-1

Installation Guidelines

3-1

3-3

Equipment That You Supply Box Contents Tools and Equipment

Verifying Switch Operation

Installing the Switch

3-5

Desk- or Shelf-Mounting (without Mounting Screws) Desk- or Shelf-Mounting (with Mounting Screws) Under the Desk- or Shelf-Mounting (with Mounting Screws) Wall-Mounting (with Mounting Screws) Magnet Mounting Rack-Mounting

3-14

3-15

Attaching Brackets to the Switch

Mounting the Switch in a 19-Inch Rack Wall-Mounting (with Rack-Mount Brackets)

3-1

3-4

3-6

3-7

3-8

3-11

3-15

3-16

CHAPTER

Where to Go Next

Troubleshooting

Diagnosing Problems

Verify Switch POST Results Monitor Switch LEDs Verify Switch Connections

Bad or Damaged Cable

Ethernet and Fiber Cables

Link Status

Transceiver Module Port Issues

Port and Interface Settings

Ping the End Device

Spanning Tree Loops Monitor Switch Performance

Speed, Duplex, and Autonegotiation

Autonegotiation and NIC Cards

Cabling Distance

3-18

4-1

4-2

4-3

4-4

4-5

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Clearing the Switch IP Address and Configuration

Locating the Switch Serial Number

4-6

4-5

Catalyst 2960 Switch Hardware Installation Guide

Contents

APPENDIX

Technical Specifications

A-1

Connector and Cable Specifications

Connector Specifications

10/100/1000 Ports

B-1

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

Connecting to 1000BASE-T Devices SFP Module Ports Dual-Purpose Ports Console Port

B-3

B-4

Cable and Adapter Specifications

SFP Module Cable Specifications Two Twisted-Pair Cable Pinouts Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports Crossover Cable and Adapter Pinouts

Identifying a Crossover Cable

Adapter Pinouts

B-8

B-1

B-2

B-4

B-6

B-7

APPENDIX

NDEX

Configuring the Switch with the CLI-Based Setup Program

Accessing the CLI

Accessing the CLI Through Express Setup Accessing the CLI Through the Console Port

Connecting to the Console Port

Starting the Terminal Emulation Software

Connecting to a Power Source

Entering the Initial Configuration Information

IP Settings Completing the Setup Program

C-1

C-2

C-3

C-4

C-5

C-1

Catalyst 2960 Switch Hardware Installation Guide

OL-7075-09

Audience

Preface

This guide is for the networking or computer technician responsible for installing the Catalyst 2960 switch, hereafter known as the switch. We assume that you are familiar with the concepts and terminology of Ethernet and local area networking. If you are interested in more training and education in these areas, learning opportunities including training courses, self-study options, seminars, and career certifications programs are available on the Cisco Training & Events web page:

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

Purpose

This guide describes the hardware features of the Catalyst 2960 switch. It describes the physical and performance characteristics of the switch, explains how to install it, and provides troubleshooting information.

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

Conventions

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

Note

Caution

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

Means reader be careful. In this situation, you might do something that could result in equipment damage or loss of data.

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Catalyst 2960 Switch Hardware Installation Guide

vii

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 2960 Switch guide. The EMC regulatory statements are also

included in that guide.

Features

CHA PTER

Product Overview

The Catalyst 2960 switch—also referred to as the switch—is an Ethernet switch to which you can connect devices such as workstations, Cisco Wireless Access Points, Cisco IP Phones, and other network devices including servers, routers, and other switches. This chapter provides a functional overview of the Catalyst 2960 switch. These topics are included:

•

Features, page 1-1

•

Front Panel Description, page 1-4

•

Rear Panel Description, page 1-19

•

Management Options, page 1-22

You can deploy the 24- and 48-port Catalyst 2960 switches as backbone switches, aggregating 10BASE-T, 100BASE-TX, and 1000BASE-T Ethernet traffic from other network devices. The Catalyst 2960 8-port compact switches provide the same Ethernet connectivity, but you can deploy these switches outside of the traditional wiring closet environment, such as in office workspaces and classrooms. See the switch software configuration guide for deployment examples.

Table 1-1 describes the switch model features.

Table 1-1 Catalyst 2960 Switch Model Descriptions

Supported

Switch Model

Catalyst 2960-8TC-S LAN-Lite 8 10/100BASE-TX Ethernet ports and 1 dual-purpose port

Catalyst 2960-24-S LAN-Lite 24 10/100BASE-TX Ethernet ports (no RPS port or SFP module slot)

Catalyst 2960-Plus 24TC-S LAN-Lite 24 10/100BASE-TX Ethernet ports and 2 dual-purpose ports (no RPS port)

Catalyst 2960-24TC-S LAN-Lite 24 10/100BASE-TX Ethernet ports and 2 dual-purpose ports (no RPS port)

Catalyst 2960-Plus 48TC-S LAN-Lite 48 10/100BASE-TX Ethernet ports and 2 dual-purpose ports (no RPS port)

Catalyst 2960-48TC-S LAN-Lite 48 10/100BASE-TX Ethernet ports and 2 dual-purpose ports (no RPS port)

Catalyst 2960-48TT-S LAN Lite 48 10/100BASE-TX ports and 2 10/100/1000 ports (no RPS port or

OL-7075-09

Software Image Description

(1 10/100/1000BASE-T copper port and 1 small form-factor pluggable [SFP] module slot); (no fan or RPS port)

SFP module slot)

Catalyst 2960 Switch Hardware Installation Guide

1-1

Chapter 1 Product Overview

Features

Table 1-1 Catalyst 2960 Switch Model Descriptions (continued)

Supported

Switch Model

Catalyst 2960-Plus 48PST-S LAN-Lite 48 10/100B SE-TX PoE ports, 2 10/100/1000 ports, and 2 SFP module slots

Catalyst 2960-48PST-S LAN-Lite 48 10/100BASE-TX PoE ports, 2 10/100/1000 ports, and 2 SFP module slots

Catalyst 2960-Plus 24PC-S LAN-Lite 24 10/100BASE-TX PoE ports and 2 dual-purpose ports

Catalyst 2960-24PC-S LAN-Lite 24 10/100BASE-TX PoE ports and 2 dual-purpose ports

Catalyst 2960-Plus 24LC-S LAN-Lite 24 10/100BASE-TX ports (8 of which are PoE) and 2 dual-purpose ports

Catalyst 2960-24LC-S LAN-Lite 24 10/100BASE-TX ports (8 of which are PoE) and 2 dual-purpose ports

Catalyst 2960-8TC-L LAN-Base 8 10/100BASE-TX Ethernet ports and 1 dual-purpose port (no fan or

Catalyst 2960G-8TC-L LAN-Base 7 10/100/100BASE-TX Ethernet ports and 1 dual-purpose port (no fan or

Catalyst 2960PD-8TT-L LAN-Base 8 10/100BASE-TX Ethernet ports and 1 10/100/1000 port that receives

Catalyst 2960-24LT-L LAN-Base 24 10/100BASE-TX ports, 8 of which are Power over Ethernet (PoE), and

Catalyst 2960-Plus 24PC-L LAN-Base 24 10/100BASE-TX PoE ports and 2 dual-purpose ports

Catalyst 2960-24PC-L LAN-Base 24 10/100BASE-TX PoE ports and 2 dual-purpose ports

Catalyst 2960-Plus 24TC-L LAN-Base 24 10/100BASE-TX Ethernet ports and 2 dual-purpose ports

Catalyst 2960-24TC-L LAN-Base 24 10/100BASE-TX Ethernet ports and 2 dual-purpose ports

Catalyst 2960G-24TC-L LAN-Base 20 10/100/1000BASE-T Ethernet ports and 4 dual-purpose ports

Catalyst 2960-24TT-L LAN-Base 24 10/100BASE-TX Ethernet ports and 2 10/100/1000BASE-T copper

Catalyst 2960-Plus 48PST-L LAN-Base 48 10/100BASE-TX PoE ports, 2 10/100/1000BASE-T copper ports, and

Catalyst 2960-48PST-L LAN-Base 48 10/100BASE-TX PoE ports, 2 10/100/1000BASE-T copper ports, and

Catalyst 2960-Plus 48TC-L LAN-Base 48 10/100BASE-TX Ethernet ports and 2 dual-purpose ports

Catalyst 2960-48TC-L LAN-Base 48 10/100BASE-TX Ethernet ports and 2 dual-purpose ports

Catalyst 2960G-48TC-L LAN-Base 44 10/100/1000BASE-T Ethernet ports and 4 dual-purpose ports

Catalyst 2960-48TT-L LAN-Base 48 10/100BASE-TX Ethernet ports and 2 10/100/1000BASE-T copper

Catalyst 2960-Plus 24LC-L LAN-Base 24 10/100BASE-TX ports (8 of which are PoE) and 2 dual-purpose ports

Software Image Description

RPS port)

power (no fan, RPS port, or SFP module slot)

2 10/100/1000 ports (no SFP module slot)

uplink ports (no SFP module slot)

2 SFP module slots

uplink ports (no SFP module slot)

1-2

The Catalyst 2960-8TC-S, 2960-8TC-L, 2960G-8TC-L, and 2960PD-8TT-L switches are smaller than the other Catalyst 2960 switches. They can be mounted with a magnet, have security lock slots, and do not have a fan. See “Catalyst 2960 8-Port Switches” section on page 1-9 for more information. See

Chapter 3, “Switch Installation (8-Port Switches),” for the installation instructions for these switch

models.

Catalyst 2960 Switch Hardware Installation Guide

OL-7075-09

Chapter 1 Product Overview

These PoE switches comply with Cisco prestandard PoE and IEEE 802.3af:

•

These are the SFP modules supported by the switches:

Features

Catalyst 2960-24LC-S

Catalyst 2960-Plus 24LC-S

Catalyst 2960-Plus 24LC-L

Catalyst 2960-24LT-L

Catalyst 2960-24PC-L

Catalyst 2960-Plus 24PC-L

Catalyst 2960-24PC-S

Catalyst 2960-Plus 24PC-S

Catalyst 2960-48PST-L

Catalyst 2960-Plus 48PST-L

Catalyst 2960-48PST-S

Catalyst 2960-Plus 48PST-S

•

1000BASE-CWDM

•

1000BASE-BX

•

1000BASE-LX/LH

•

1000BASE-SX

•

1000BASE-T

•

1000BASE-ZX

•

100BASE-BX

•

100BASE-FX

•

100BASE-LX

The Catalyst 2960-24PC-L, 2960-Plus 24PC-L, 2960-24PC-S, 2960-Plus 24PC-S, 2960-24LC-S,2960-Plus 24LC-S, 2960-Plus 24LC-L, 2960-24TC-L, 2960-Plus 24TC-L, 2960-48TC-L, 2960-Plus 48TC-L, 2960-48PST-L, 2960-Plus 48PST-L, 2960-48PST-S, 2960-Plus 48PST-S, 2960G-24TC-L, and 2960G-48TC-L switches support all the SFP modules.

The Catalyst 2960-8TC-S, 2960-24TC-S, 2960-Plus 24TC-S, 2960-48TC-S, and 2960-Plus 48TC-S switches support only 1000BASE-LX/LH, 1000BASE-SX, and 100BASE-FX SFP modules.

The Catalyst 2960-8TC-L, 2960G-8TC-L, and 2960-8TC-S switches do not support the 1000BASE-T or GLC-GE-100FX SFP modules.

For specific information about which SFP modules are supported on specific switches, see the Cisco Gigabit Ethernet Transceiver Modules Compatibility Matrix at this Cisco.com URL:

OL-7075-09

http://www.cisco.com/en/US/docs/interfaces_modules/transceiver_modules/compatibility/matrix/ OL_6981.html

The 1000BASE-T SFP modules operate at 10, 100, or 1000 Mb/s in full-duplex mode or at 10 or 100 Mb/s in half-duplex mode when installed in Catalyst 2960 switches. The 10/100 and 10/100/1000 ports autonegotiate speed and support full-duplex or half-duplex mode.

Catalyst 2960 Switch Hardware Installation Guide

1-3

Front Panel Description

Chapter 1 Product Overview

Some Catalyst 2960 switches have a redundant power system (RPS) connector for an optional Cisco RPS 2300 or Cisco RPS 675 redundant power system that operates on AC input and supplies backup DC power to the switch. See the compatibility matrix documents for the RPS systems on Cisco.com for more information about switch support for the RPS models.

These switches do not have an RPS connector:

•

Catalyst 2960-8TC-L

•

Catalyst 2960G-8TC-L

•

Catalyst 2960-8TC-S

•

Catalyst 2960PD-8TT-L

•

Catalyst 2960-24-S

•

Catalyst 2960-24TC-S

•

Catalyst 2960-Plus 24TC-S

•

Catalyst 2960-48TT-S

•

Catalyst 2960-48TC-S

•

Catalyst 2960-Plus 48TC-S

Front Panel Description

These sections describe the switch front panels:

•

Catalyst 2960 Switch 24- and 48-Port Switches, page 1-4

•

Catalyst 2960 8-Port Switches, page 1-9

•

10/100 Ports, page 1-11

•

10/100/1000 Ports, page 1-11

•

PoE Ports (Only Catalyst 2960 PoE Switches), page 1-12

•

SFP Module Slots, page 1-13

•

Dual-Purpose Port, page 1-13

•

Power Input Port (Catalyst 2960PD-8TT-L Switch), page 1-14

•

LEDs, page 1-14

•

Cable Guard for the Catalyst 2960 8-Port Switches, page 1-19

Catalyst 2960 Switch 24- and 48-Port Switches

These sections describe the Catalyst 2960 24- and 48-port switches:

•

Catalyst 2960-24-S, 2960-Plus 24TC-S, 2960-24TC-S, 2960-Plus 48TC-S, 2960-48TC-S, and 2960-48TT-S Switches, page 1-5

1-4

•

Catalyst 2960G-24TC-L and Catalyst 2960G-48TC-L Switches, page 1-9

Catalyst 2960 Switch Hardware Installation Guide

OL-7075-09

Chapter 1 Product Overview

Catalyst 2960

Series SI

SYST

STAT DUPLX SPEED

MODE

204631

Front Panel Description

Catalyst 2960-24-S, 2960-Plus 24TC-S, 2960-24TC-S, 2960-Plus 48TC-S, 2960-48TC-S, and 2960-48TT-S Switches

The 10/100 ports on the Catalyst 2960-24-S switch are numbered as follows: The first member of the pair (port 1) is above the second member (port 2), port 3 is above port 4, and so on. See Figure 1-1.

Figure 1-1 Catalyst 2960-24-S Switch Front Panel

Series SI

Catalyst 2960

SYST

STAT DUPLX SPEED

MODE

1 10/100 ports

The 10/100 ports on the Catalyst 2960-Plus 24TC-S, 2960-24TC-S, 2960-Plus 48TC-S, and 2960-48TC-S switches are numbered in the same way as the Catalyst 2960-24-S switch. These switches have dual-purpose ports, that is, 10/100/1000 ports 1 and 2 can use either the SFP module or the RJ-45 connector for that port, but not both at the same time. Use the software to set the connector type for these ports. For more information about the dual-purpose port, see the “Dual-Purpose Port” section on

page 1-13. See Figure 1-2 and Figure 1-3.

204632

Figure 1-2 Catalyst 2960-Plus 24TC-S and 2960-24TC-S Switch Front Panel

1 10/100 ports 2 Dual-purpose ports

Figure 1-3 Catalyst 2960-Plus 48TC-S and 2960-48TC-S Switch Front Panel

Series SI

SYST

STAT DUPLX SPEED

MODE

65 87 109 1211 21 43

1817 2019 2221 1413 1615

2423

3029 3231 3433 3635 2625 2827

4241 4443 4645 4847 3837 4039

Catalyst 2960

204630

1 2

1 10/100 ports 2 Dual-purpose ports

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Catalyst 2960 Switch Hardware Installation Guide

1-5

Chapter 1 Product Overview

Catalyst 2960 Series SI

271431

Catalyst 2960 Series PoE-24

1 2

12X

11X

6 5 8 7 10 9 12 11 2 1 4 3

14X

13X

24X

23X

18 17 20 19 22 21 24 23 14 13 16 15

SYST

STAT DUPLX SPEED

RPS

PoE

MODE

POWER

OVER

ETHERNET

204641

206731

1 2

Front Panel Description

The 10/100 ports on the Catalyst 2960-48TT-S switch are numbered as follows: The first member of the pair (port 1) is above the second member (port 2), port 3 is above port 4, and so on. This switch has two 10/100/1000 uplink ports, numbered 1 and 2. The See Figure 1-4.

Figure 1-4 Catalyst 2960-48TT-S Switch Front Panel

1 10/100 ports 2 10/100/1000 ports

The 10/100 ports on the switches are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2), port 3 is above port 4, and so on.

The fixed 10/100 ports on the Catalyst 2960-24PC-L and 2960-24PC-S

switches are PoE ports.

See Figure 1-5 and Figure 1-6.

Ports 1 to 8 on the Catalyst 2960-24LC-S switch are PoE ports. See Figure 1-7.

Figure 1-5 Catalyst 2960-Plus 24PC-L and 2960-24PC-L Switch Front Panel

1 10/100 PoE ports 2 Dual-purpose ports

Figure 1-6 Catalyst 2960-Plus 24PC-S and 2960-24PC-S Switch Front Panel

1 10/100 PoE ports 2 Dual-purpose ports

1-6

Catalyst 2960 Switch Hardware Installation Guide

OL-7075-09

Chapter 1 Product Overview

206730

1 32

204606

1 2

Figure 1-7 Catalyst 2960-Plus 24LC-L and 2960-24LC-S Switch Front Panel

1 10/100 PoE ports 3 Dual-purpose ports

2 10/100 ports

The Catalyst 2960-24TC-L and Catalyst 2960-48TC-L switches have dual-purpose ports, that is, 10/100/1000 ports 1 and 2 can use either the SFP module or the RJ-45 connector for that port, but not both. Use the software to set the connector type for these ports. For more information about the dual-purpose port, see the “Dual-Purpose Port” section on page 1-13. See Figure 1-8 and Figure 1-9.

Figure 1-8 Catalyst 2960-Plus 24TC-L and 2960-24TC-L Switch Front Panel

Front Panel Description

1 10/100 ports 2 Dual-purpose ports

Figure 1-9 Catalyst 2960-Plus 48TC-L and 2960-48TC-L Switch Front Panel

TAT

204608

1 10/100 ports 2 Dual-purpose ports

The Catalyst 2960-24LT-L, Catalyst 2960-24TT-L, and Catalyst 2960-48TT-L switches have two 10/100/1000 uplink ports, numbered 1 and 2. Ports 1 to 8 on the Catalyst 2960-24LT-L switch are PoE ports. See Figure 1-10, Figure 1-11, and Figure 1-12.

Figure 1-10 Catalyst 2960-24LT-L Switch Front Panel

65 87 109 1211 21 43

SYST RPS STAT DUPLX SPEED PoE

MODE

POWER

ETHERNET

OVER

11X

12X

1817 2019 2221 2423 1413 1615

13X

14X

Catalyst 2960 Series PoE-8

23X

24X

204642

21 3

1 10/100 PoE ports 3 10/100/1000 uplink ports

2 10/100 ports

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Catalyst 2960 Switch Hardware Installation Guide

1-7

Front Panel Description

204607

TAT

1 2

204609

TAT

Catalyst 2960 Series PoE-48

26X

24X

36X

35X

3029 3231 3433 3635 2625 2827

38X

37X

48X

47X

12X

11X

14X

13X

24X

23X

4241 4443 4645 4847 3837 4039 65 87 109 1211 21 43 1817 2019 2221 2423 1413 1615

SYST

STAT DUPLX SPEED

RPS

PoE

MODE

POWER

OVER

ETHERNET

3 4

205644

Chapter 1 Product Overview

Figure 1-11 Catalyst 2960-24TT-L Switch Front Panel

1 10/100 ports 2 10/100/1000 uplink ports

Figure 1-12 Catalyst 2960-48TT-L Switch Front Panel

1 10/100 ports 2 10/100/1000 uplink ports

The Catalyst 2960-48PST-L and 2960-48PST-S switches have two SFP module slots (numbered 1 and 2) and two 10/100/1000 uplink ports (numbered 3 and 4). Ports 1 to 48 on the switch are PoE ports. See

Figure 1-13 and Figure 1-14.

Figure 1-13 Catalyst 2960-Plus 48PST-L and 2960-48PST-L Switch Front Panel

1 10/100 PoE ports 3 SFP module slots

2 10/100/1000 uplink ports

Figure 1-14 Catalyst 2960-Plus 48PST-S and 2960-48PST-S Switch Front Panel

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1 2

1 10/100 PoE ports 3 SFP module slots

2 10/100/1000 uplink ports

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Catalyst 2960G-24TC-L and Catalyst 2960G-48TC-L Switches

The 10/100/1000 ports on the Catalyst 2960G-24TC-L and Catalyst 2960G-48TC-L switches are grouped in pairs. The first member of the pair (port 1) is above the second member (port 2), port 3 is above port 4, and so on. The SFP module slots are numbered 21 to 24 on the Catalyst 2960G-24TC-L switch and 45 to 48 on the Catalyst 2960G-48TC-L switch. See Figure 1-15 and Figure 1-16.

The Catalyst 2960G-24TC-L and Catalyst 2960G-48TC-L switches have dual-purpose ports, meaning ports 21 to 24 or 45 to 48 can use either the SFP module or the RJ-45 connector for that port, but not both. Use the software to set the connector type for these ports. For more information about the dual-purpose port, see the “Dual-Purpose Port” section on page 1-13.

Figure 1-15 Catalyst 2960G-24TC-L Switch Front Panel

TAT

PLX

1 2

Front Panel Description

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1 10/100/1000 ports 2 Dual-purpose ports

Figure 1-16 Catalyst 2960G-48TC-L Switch Front Panel

12X

1 10/100/1000 ports 2 Dual-purpose ports

Catalyst 2960 8-Port Switches

These sections describe the Catalyst 2960 8-port switches:

•

Catalyst 2960PD-8TT-L Switch, page 1-9

•

Catalyst 2960-8TC-S, Catalyst 2960-8TC-L, and Catalyst 2960G-8TC -L Switches, page 1-10

Catalyst 2960PD-8TT-L Switch

The Catalyst 2960PD-8TT-L (Figure 1-17) switch front panel has a console port, eight 10/100 ports, and a 10/100/1000 uplink port that can receive power from an upstream PoE switch. The switch can also receive power from an optional AC power adapter that is connected through the rear panel.

t 2

16X

12X

33X

31X

34X

45 46 47 48

46X

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Front Panel Description

Catalyst 2960 Series

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1x 2x 3x 4x 5x 6x 7x

PoE INPUT

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Catalyst 2960

eries

CONSOLE

SPD

DPLX

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3x 4x

5x 6x

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Figure 1-17 Catalyst 2960PD-8TT-L Switch Front Panel

1 Console port 3 10/100/1000 power input port

2 10/100 ports

Catalyst 2960-8TC-S, Catalyst 2960-8TC-L, and Catalyst 2960G-8TC -L Switches

The console ports for the Catalyst 2960-8TC-S, Catalyst 2960-8TC-L, and Catalyst 2960G-8TC-L switches (Figure 1-18 to Figure 1-20) are on the front panels. The switches also have a dual-purpose port that can use either an RJ-45 connector or an SFP module, but not both at the same time. Use the software to set the connector type for these ports.

Chapter 1 Product Overview

For more information on the dual-purpose port, see the “Dual-Purpose Port” section on page 1-13. For more information on the console port, see the “Console Port” section on page 1-21.

Figure 1-18 Catalyst 2960-8TC-S Switch Front Panel

1 Console port 3 Dual-purpose port

2 10/100/100 ports

Figure 1-19 Catalyst 2960-8TC-L Switch Front Panel

1 Console port 3 Dual-purpose port

2 10/100/100 ports

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Figure 1-20 Catalyst 2960G-8TC-L Switch Front Panel

Front Panel Description

10/100 Ports

Catalyst 2960G

SYST

STAT

DPLX

SPD

CONSOLE

MODE

3x 4x

5x 6x

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1 Console port 3 Dual-purpose port

2 10/100/1000 ports

You can set the 10/100 ports to operate at 10 or 100 Mb/s in full-duplex or half-duplex mode. You can also set these ports for speed and duplex autonegotiation. The default setting is autonegotiate. When the port is set to autonegotiate, it 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 (that is, the fastest line speed that both devices support and full-duplex transmission if the attached device supports it) and configures itself accordingly. In all cases, the attached device must be within 328 feet (100 meters).

100BASE-TX traffic requires a Category 5 or higher cable. 10BASE-T traffic can use Category 3 or Category 4 cables.

When you connect the switch to workstations, servers, routers, and Cisco IP Phones, be sure that the cable is a straight-through cable. When you connect the switch to switches or hubs, use a crossover cable. Pinouts for the cables are described in Appendix B, “Connector and Cable Specifications.”

You can use the mdix auto interface configuration command in the command-line interface (CLI) to enable the 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 10/100/1000 or 1000BASE-T SFP module port on the switch, regardless of the type of device on the other end of the connection. For configuration information for this feature, see the switch software configuration guide or the switch command reference.

10/100/1000 Ports

You can set the 10/100/1000 ports to operate at 10, 100, or 1000 Mb/s in full-duplex or half-duplex mode. You can also set these ports for speed and duplex autonegotiation. (The default setting is autonegotiate.) When you set the port for autonegotiation, it 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 (that is, the fastest line speed that both devices support and full-duplex transmission if the attached device supports it) and configures itself accordingly. In all cases, the attached device must be within 328 feet (100 meters).

100BASE-TX and 1000BASE-T traffic requires a Category 5 or higher cable. 10BASE-T traffic can use Category 3 or Category 4 cables.

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Front Panel Description

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 higher cable for proper operation. Pinouts for the cables are described in

Appendix B, “Connector and Cable Specifications.”

You can use the mdix auto interface configuration command 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 10/100/1000 or 1000BASE-T SFP module port on the switch, regardless of the type of device on the other end of the connection. For configuration information for this feature, see the switch software configuration guide or the switch command reference.

PoE Ports (Only Catalyst 2960 PoE Switches)

This section applies only to the Catalyst 2960-24PC-L, 2960-24LT-L, 2960-24PC-S, 2960-24LC-S, 2960 48PST-L, and 2960-48PST-S switches.

Chapter 1 Product Overview

Warning

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.

•

The 10/100 ports on the Catalyst 2960-Plus 24PC-L, 2960-24PC-L, 2960-Plus 48PST-L,

Statement 1072

2960-48PST-L, 2960-Plus 48PST-S, 2960-48PST-S, 2960-Plus 24PC-S, and 2960-24PC-S, switches and ports 1 to 8 of the 10/100 ports on the Catalyst 2960-24LT-L, 2960-Plus 24LC-L, 2960-Plus 24LC-S, and 2960-24LC-S switches provide PoE support for devices that are compliant with IEEE

802.3af. The Cisco prestandard PoE is also supported for Cisco IP Phones and Cisco Aironet Access Points.

•

Each of the PoE ports on the Catalyst 2960 switches deliver up to 15.4 W of PoE.

The Catalyst 2960-Plus 24PC-L, 2960-24PC-L, 2960-Plus 48PST-L, 2960-48PST-L, 2960-Plus 48PST-S, 2960-48PST-S, 2960-Plus 24PC-S, and 2960-24PC-S switches deliver a maximum power output of approximately 370-W PoE power.

The Catalyst 2960-24LT-L, 2960-Plus 24LC-L, 2960-Plus 24LC-S, and 2960-24LC-S switches deliver a maximum power output of approximately 124-W PoE power.

•

On a per-port basis, you can control whether or not a Catalyst 2960 PoE port automatically provides power when an IP phone or an access point is connected. The device manager, Network Assistant, and the CLI provide PoE settings for each 10/100 PoE port:

–

Auto: When you select the Auto setting, the port provides power only if a valid powered device, such as an IEEE 802.3af-compliant powered device, a Cisco prestandard IP phone, or a Cisco prestandard Cisco access point, is connected. The Auto setting is the default.

–

Never: When you select the Never setting, the port does not provide power even if a Cisco IP phone or an access point is connected.

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•

For information about configuring and monitoring PoE ports, see the switch software configuration guide. For information about Cisco IP Phones and Cisco Aironet Access Points, see the documentation that came with your IP phone or access point.

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.

SFP Module Slots

The Catalyst 2960 switches (other than those listed) use Gigabit Ethernet SFP modules for Gigabit uplink connections and 100-Megabit SFP modules for 100-Megabit connections to establish fiber-optic connections. These Catalyst 2960 switches do not have an SFP module slot:

•

Front Panel Description

You also can connect a Cisco IP Phone or Cisco Aironet Access Point to a Catalyst 2960 PoE switch 10/100 port and to an AC power source for redundant power. The powered device might switch to the AC power source as its primary power source upon being 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.

Catalyst 2960PD-8TT-L

•

Catalyst 2960-24LT-L

•

Catalyst 2960-24-S

•

Catalyst 2960-24TT-L

•

Catalyst 2960-48TT-L

•

Catalyst 2960-48TT-S

The transceiver modules are field-replaceable, providing the uplink interfaces when you insert an SFP module. You can use the SFP modules for Gigabit uplink connections to other switches. You use fiber-optic cables with LC connectors to connect to a fiber-optic SFP module. You use Category 5 or higher cable with RJ-45 connectors to connect to a copper SFP module.

For more information about these SFP modules, see your SFP module documentation or the release notes for your switch software. For more information about cabling requirements, see Appendix B,

“Connector and Cable Specifications.”

Dual-Purpose Port

You can configure a dual-purpose port as either a 10/100/1000 port or as an SFP module port. Each port is considered as a single interface with dual front ends—an RJ-45 connector and an SFP module connector. The dual front ends are not redundant interfaces. The switch activates only one connector of the pair at a time.

By default, the switch dynamically selects the interface type that first links up. However, you can use the media-type interface configuration command to manually select the RJ-45 connector or the SFP module connector. For information about configuring speed and duplex settings for a dual-purpose uplink, see the software configuration guide.

Each uplink port has two LEDs: one shows the status of the RJ-45 port, and one shows the status of the SFP module port. The port LED is on the active connector.

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Front Panel Description

Catalyst 2960 Series

SYST STAT DPLX

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MODE

CONSOLE

1x 2x 3x 4x 5x 6x 7x

PoE INPUT

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Power Input Port (Catalyst 2960PD-8TT-L Switch)

The Catalyst 2960PD-8TT-L can receive power from these sources:

Through a 10/100/1000 port from an upstream Ethernet switch that provides power (complies with IEEE 802.3af). (See Figure 1-21.)

Through an external AC power adapter that connects to the back of the switch. This external power adapter (PWR-A=) is not included with the switch, but you can order it from your Cisco representative. (See Figure 1-22.)

Figure 1-21 Connecting Through a 10/100/1000 Port

Chapter 1 Product Overview

Figure 1-22 Connecting Through an External AC Power Adapter

1 Power adapter port

LEDs

You can use the switch LEDs to monitor switch activity and its performance. Figure 1-23 shows 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—Network Assistant for multiple switches and the device manager for a single switch. The switch software configuration guide describes how to use the CLI to configure and to monitor individual switches and switch clusters.

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Only the Catalyst 2960 PoE switches have a PoE LED.

The four Catalyst 2960 8-port switches and these models do not have an RPS connector or an RPS LED: Catalyst 2960-24-S, Catalyst 2960-Plus 24TC-S, 2960-24TC-S, 2960-48TT-S, 2960-Plus 48TC-S, 2960-48TC-S.

Figure 1-23 Catalyst 2960 Switch LEDs

Front Panel Description

SYST

RPS STAT

DUPLX

SPEED PoE

MODE

11X1X11X

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System LED

1 SYST LED 5 Speed LED

2 RPS LED 6 PoE LED

3 Status LED 7 Mode button

4 Duplex LED 8 Port LEDs

1. The PoE LED is only on the Catalyst 2960 PoE switches.

The System LED shows whether the system is receiving power and is functioning properly. Ta ble 1 -2 lists the LED colors and their meanings.

Table 1-2 System LED

Color System Status

Off System is not powered on.

Green System is operating normally.

Amber System is receiving power but is not functioning properly.

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Front Panel Description

RPS LED

Chapter 1 Product Overview

The RPS LED shows the RPS status. Table 1-3 lists the LED colors and their meanings.

Note

The Catalyst 2960 8-port switches, and the Catalyst 2960-24-S, 2960-Plus 24TC-S, 2960-24TC-S, 2960-Plus 48TC-S, 2960-48TC-S, and 2960-48TT-S switches do not have an RPS LED.

Table 1-3 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.

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

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

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

For more information about the Cisco RPS 2300 or the Cisco RPS 675, see the related hardware installation guide for that power system.

Port LEDs and Modes

(redundancy has been allocated to a neighboring device).

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

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

The port LEDs, as a group or individually, display information about the switch and about the individual ports (Ta bl e 1 -4 ):

Table 1-4 Modes for Port LEDs

Selected 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

PoE

1. When installed in Catalyst 2960 switches, 1000BASE-T SFP modules can operate at 10, 100, or 1000 Mb/s in

2. The PoE LED is only on the Catalyst 2960 PoE switches.

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

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

PoE port power The PoE status.

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Even if the PoE mode is not selected, the PoE LED shows PoE problems when they are detected (Table 1-5). The PoE LED applies only to Catalyst 2960 switches that support PoE.

Table 1-5 PoE Mode LED

Color PoE Status

Off PoE mode is not selected. None of the 10/100 PoE 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 PoE ports has been denied

power, or at least one of the 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. Table 1-6 explains how to interpret the port LED colors in different port modes.

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

Front Panel Description

Port Mode LED Color Meaning

STAT (port status)

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

Blinking amber Port is blocked by STP and is not sending or receiving packets.

DUPLX (duplex)

SPEED

Off Port is operating in half duplex.

Green Port is operating in full duplex.

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 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.

After a port is reconfigured, the port LED can remain amber for up to 30 seconds as STP checks the network topology for possible loops.

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Note

When installed in Catalyst 2960 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.

Catalyst 2960 Switch Hardware Installation Guide

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Front Panel Description

2 3

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

Port Mode LED Color Meaning

PoE Off PoE is off.

If the powered device is receiving power from an AC power source, the PoE 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 amber

Blinking amber PoE is off due to a fault.

PoE is denied because providing power to the powered device will exceed the switch power capacity. The Catalyst 2960-Plus 24PC-L, 2960-24PC-L, 2960-Plus 48PST-L, 2960-48PST-L, 2960-Plus 48PST-S, 2960-48PST-S, 2960-Plus 24PC-S, and 2960-24PC-S switches provide up to 370 W of power. The Catalyst 2960-24LT-L, 2960-Plus 24LC-L, 2960-Plus 24LC-S, and 2960-24LC-S switches provide up to 124 W of power.

Chapter 1 Product Overview

Amber PoE for the port has been disabled. By default, PoE is enabled.

Dual-Purpose Port LEDs

The LEDs on a dual-purpose port show whether an RJ-45 connector is connected to the port, or if an SFP module is installed in the slot. See the example in Figure 1-24. You can configure each port as either a 10/100/1000 port through the RJ-45 connector or as an SFP module, but not both at the same time. The LEDs show how the port is being used (Ethernet or SFP module).

The LED colors have the same meanings as described in Table 1-4 and Ta b le 1-6.

Figure 1-24 Dual-Purpose Port LEDs

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 prestandard IP Phones or wireless access points or IEEE 802.3af-compliant devices to PoE ports. You must remove from the network the cable or device that causes a PoE fault.

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1 RJ-45 connector 3 SFP module port in-use LED

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1 2 3 4

137071

Cable Guard for the Catalyst 2960 8-Port Switches

You can order an optional cable guard to secure cables to the front of the Catalyst 2960-8TC-L, 2960G-8TC-L, 2960-8TC-S, and 2960PD-8TT-L switches and prevent them from being accidentally removed.

To order a cable guard, contact your Cisco representative using these part numbers:

•

CBLGRD-C2960-8TC: Catalyst 2960-8TC-L, 2960-8TC-S, and 2960PD-8TT-L switches

•

CBLGRD-C2960G-8TC: Cisco Catalyst 2960G-8TC switch

Rear Panel Description

•

Internal Power Supply, page 1-20

•

Cisco RPS, page 1-20

•

Console Port, page 1-21

Depending on the Catalyst 2960 switch model, the switch can have an RJ-45 console port, a fan exhaust, an RPS connector, and an AC power connector (see Figure 1-25 for an example of a Catalyst 2960 rear panel).

Rear Panel Description

Figure 1-25 Catalyst 2960 Switch Rear Panel

1 RJ-45 console port

2 Fan exhaust

1. The Catalyst 2960 8-port switches have the console port on the front panel rather than on the rear panel.

2. These Catalyst 2960 switches do not have an RPS connector: Catalyst 8-port switches, 2960-24-S, 2960-Plus 24TC-S, 2960-24TC-S, 2960-Plus 48TC-S, 2960-48TC-S, and 2960-48TT-S switches.

3. The Catalyst 2960 8-port switches do not have a fan.

4. The Catalyst 2960PD-8TT-L switch does not have an AC internal power supply.

3 RPS connector

4 AC power connector

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Rear Panel Description

Internal Power Supply

All switches other than the Catalyst 2960PD-8TT-L are powered through their internal power supply. 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.

Chapter 1 Product Overview

Note

Cisco RPS

Warning

Note

The Catalyst 2960PD-8TT-L switch does not have a internal power supply. For more information, see

“Power Input Port (Catalyst 2960PD-8TT-L Switch)” section on page 1-14.

Depending on the switch model, you can connect the switch to either of these Cisco redundant power systems (RPS) to provide backup power if the switch power supply fails:

•

“Cisco RPS 2300” section on page 1-20

•

“Cisco RPS 675” section on page 1-21

Connect the switch and the Cisco RPS to the same AC power source. Use the RPS connector cable supplied with the RPS to connect the RPS to the switch.

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

These Catalyst 2960 switches do not have an RPS connector: Catalyst 8-port switches, 2960-24-S, 2960-Plus 24TC-S, 2960-24TC-S, 2960-Plus 48TC-S, 2960-48TC-S, 2960-48TT-S, 2960-Plus 48PST-S, 2960-48PST-S, 2960-Plus 24PC-S, 2960-24PC-S, 2960-Plus 24LC-S, and 2960-24LC-S switches.

Statement 370

Note

Cisco RPS 2300

Catalyst 2960 Switch Hardware Installation Guide

1-20

These Catalyst 2960 switches support only the Cisco RPS 2300: Catalyst 2960-24PC-L, 2960-24LT-L, and 2960-48PST-L switches.

For complete information about the Cisco RPS products, including compatibility matrixes listing the supported RPS for each Catalyst 2960 switch, see the RPS documents on Cisco.com:

http://www.cisco.com/en/US/products/ps7148/prod_installation_guides_list.html

The Cisco RPS 2300 is a redundant power system that supports six network switches and provides power to one or two failed switches at a time. It automatically senses when the internal power supply of a connected switch fails and provides power to the failed switch, preventing loss of network traffic.

The Cisco RPS 2300 has two output levels: -52 V and 12 V. The total maximum output power depends on the installed power-supply modules.

All supported, connected switches can simultaneously communicate with the RPS 2300. You can configure these RPS 2300 features through the switch software:

•

Enable RPS active or standby mode for each connected switch

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