Cisco 4948E-F, 4948E User Manual

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

January 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-21561-02

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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.

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

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

IMPLIED, INCLUDING, WITHOUT

CONTENTS

Preface ix

Audience i-ix

Organization i-ix

Preface

This preface describes the audience, organization, and conventions of the Catalyst 4948E and Catalyst

documentation.

Audience

Only trained and qualified service personnel (as defined in IEC60950-1 and AZ/NZS 60950-1) should install, replace, or service the equipment.

Organization

This guide is organized as follows:

Chapter Title Description

Chapter 1 Product Overview Describes the hardware features, specifications, and

Chapter 2 Preparing for

Chapter 3 Installing the Switch Describes how to rack-mount the Catalyst 4948E and the

Chapter 4 Removal and

Appendix A Power Supply

Appendix B Transceiver, Chassis

4948E-F Switch Installation Guide and provides information on how to obtain related

Installation

Replacement Procedures

Specifications

Connectors, and Cable and Adapter Specifications

functionality of the Catalyst Catalyst

Describes how to prepare your site for the installation of the Catalyst

Catalyst

Describes how to remove and install the field replaceable units on the Catalyst switches.

Lists the switch system specifications.

Describes the SFP and SFP+ transceivers, the chassis connectors, and the cables and adapters supplied with the Catalyst

4948E-F switches.

4948E and Catalyst 4948E-F switches.

4948E-F switches and attach the cables.

4948E and Catalyst 4948E-F

4948E and Catalyst 4948E-F switches.

4948E and

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Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

Command Syntax Conventions

Table 1 describes the syntax used with the commands in this document.

Ta b l e 1 Command Syntax Guide

Convention Description

boldface Commands and keywords.

italic Command input that is supplied by you.

[ ] Keywords or arguments that appear within square

brackets are optional.

{ x | x | x } A choice of keywords (represented by x) appears in

braces separated by vertical bars. You must select one.

^ or Ctrl Represent the key labeled Control. For example, when

you read ^D or Ctrl-D, you should hold down the Control key while you press the D key.

screen font

boldface screen font Information you must enter is in boldface screen

Terminal sessions and information the system displays are in

screen font.

font.

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

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Preface

Command Syntax Conventions

Table 1 Command Syntax Guide

Convention Description

< > Nonprinting characters, such as passwords, appear in

angled brackets.

[ ] Default responses to system prompts appear in square

brackets.

Note Means reader take note.

Tip Means the following information will help you solve a problem.

Caution Means reader be careful. In this situation, you might perform an action that could result in equipment

damage or loss of data.

Warning

Means reader be warned. In this situation, you might perform an action that could result in bodily injury.

Statement 1071—Warning Definition

Warning

Waarschuwing

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

BELANGRIJKE VEILIGHEIDSINSTRUCTIES

Dit waarschuwingssymbool betekent gevaar. U verkeert in een situatie die lichamelijk letsel kan veroorzaken. Voordat u aan enige apparatuur gaat werken, dient u zich bewust te zijn van de bij elektrische schakelingen betrokken risico's en dient u op de hoogte te zijn van de standaard praktijken om ongelukken te voorkomen. Gebruik het nummer van de verklaring onderaan de waarschuwing als u een vertaling van de waarschuwing die bij het apparaat wordt geleverd, wilt raadplegen.

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BEWAAR DEZE INSTRUCTIES

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

Command Syntax Conventions

Preface

Varoitus

Attention

Warnung

TÄRKEITÄ TURVALLISUUSOHJEITA

Tämä varoitusmerkki merkitsee vaaraa. Tilanne voi aiheuttaa ruumiillisia vammoja. Ennen kuin käsittelet laitteistoa, huomioi sähköpiirien käsittelemiseen liittyvät riskit ja tutustu onnettomuuksien yleisiin ehkäisytapoihin. Turvallisuusvaroitusten käännökset löytyvät laitteen mukana toimitettujen käännettyjen turvallisuusvaroitusten joukosta varoitusten lopussa näkyvien lausuntonumeroiden avulla.

SÄILYTÄ NÄMÄ OHJEET

IMPORTANTES INFORMATIONS DE SÉCURITÉ

Ce symbole d'avertissement indique un danger. Vous vous trouvez dans une situation pouvant entraîner des blessures ou des dommages corporels. Avant de travailler sur un équipement, soyez conscient des dangers liés aux circuits électriques et familiarisez-vous avec les procédures couramment utilisées pour éviter les accidents. Pour prendre connaissance des traductions des avertissements figurant dans les consignes de sécurité traduites qui accompagnent cet appareil, référez-vous au numéro de l'instruction situé à la fin de chaque avertissement.

CONSERVEZ CES INFORMATIONS

WICHTIGE SICHERHEITSHINWEISE

Dieses Warnsymbol bedeutet Gefahr. Sie befinden sich in einer Situation, die zu Verletzungen führen kann. Machen Sie sich vor der Arbeit mit Geräten mit den Gefahren elektrischer Schaltungen und den üblichen Verfahren zur Vorbeugung vor Unfällen vertraut. Suchen Sie mit der am Ende jeder Warnung angegebenen Anweisungsnummer nach der jeweiligen Übersetzung in den übersetzten Sicherheitshinweisen, die zusammen mit diesem Gerät ausgeliefert wurden.

Avvertenza

Advarsel

BEWAHREN SIE DIESE HINWEISE GUT AUF.

IMPORTANTI ISTRUZIONI SULLA SICUREZZA

Questo simbolo di avvertenza indica un pericolo. La situazione potrebbe causare infortuni alle persone. Prima di intervenire su qualsiasi apparecchiatura, occorre essere al corrente dei pericoli relativi ai circuiti elettrici e conoscere le procedure standard per la prevenzione di incidenti. Utilizzare il numero di istruzione presente alla fine di ciascuna avvertenza per individuare le traduzioni delle avvertenze riportate in questo documento.

CONSERVARE QUESTE ISTRUZIONI

VIKTIGE SIKKERHETSINSTRUKSJONER

Dette advarselssymbolet betyr fare. Du er i en situasjon som kan føre til skade på person. Før du begynner å arbeide med noe av utstyret, må du være oppmerksom på farene forbundet med elektriske kretser, og kjenne til standardprosedyrer for å forhindre ulykker. Bruk nummeret i slutten av hver advarsel for å finne oversettelsen i de oversatte sikkerhetsadvarslene som fulgte med denne enheten.

TA VARE PÅ DISSE INSTRUKSJONENE

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Preface

Command Syntax Conventions

Aviso

¡Advertencia!

Varning!

INSTRUÇÕES IMPORTANTES DE SEGURANÇA

Este símbolo de aviso significa perigo. Você está em uma situação que poderá ser causadora de lesões corporais. Antes de iniciar a utilização de qualquer equipamento, tenha conhecimento dos perigos envolvidos no manuseio de circuitos elétricos e familiarize-se com as práticas habituais de prevenção de acidentes. Utilize o número da instrução fornecido ao final de cada aviso para localizar sua tradução nos avisos de segurança traduzidos que acompanham este dispositivo.

GUARDE ESTAS INSTRUÇÕES

INSTRUCCIONES IMPORTANTES DE SEGURIDAD

Este símbolo de aviso indica peligro. Existe riesgo para su integridad física. Antes de manipular cualquier equipo, considere los riesgos de la corriente eléctrica y familiarícese con los procedimientos estándar de prevención de accidentes. Al final de cada advertencia encontrará el número que le ayudará a encontrar el texto traducido en el apartado de traducciones que acompaña a este dispositivo.

GUARDE ESTAS INSTRUCCIONES

VIKTIGA SÄKERHETSANVISNINGAR

Denna varningssignal signalerar fara. Du befinner dig i en situation som kan leda till personskada. Innan du utför arbete på någon utrustning måste du vara medveten om farorna med elkretsar och känna till vanliga förfaranden för att förebygga olyckor. Använd det nummer som finns i slutet av varje varning för att hitta dess översättning i de översatta säkerhetsvarningar som medföljer denna anordning.

SPARA DESSA ANVISNINGAR

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Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

xiii

Command Syntax Conventions

Preface

Aviso

Advarsel

INSTRUÇÕES IMPORTANTES DE SEGURANÇA

Este símbolo de aviso significa perigo. Você se encontra em uma situação em que há risco de lesões corporais. Antes de trabalhar com qualquer equipamento, esteja ciente dos riscos que envolvem os circuitos elétricos e familiarize-se com as práticas padrão de prevenção de acidentes. Use o número da declaração fornecido ao final de cada aviso para localizar sua tradução nos avisos de segurança traduzidos que acompanham o dispositivo.

GUARDE ESTAS INSTRUÇÕES

VIGTIGE SIKKERHEDSANVISNINGER

Dette advarselssymbol betyder fare. Du befinder dig i en situation med risiko for legemesbeskadigelse. Før du begynder arbejde på udstyr, skal du være opmærksom på de involverede risici, der er ved elektriske kredsløb, og du skal sætte dig ind i standardprocedurer til undgåelse af ulykker. Brug erklæringsnummeret efter hver advarsel for at finde oversættelsen i de oversatte advarsler, der fulgte med denne enhed.

GEM DISSE ANVISNINGER

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Preface

Command Syntax Conventions

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Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

Obtaining Documentation and Submitting a Service Request

Preface

Obtaining Documentation and Submitting a Service Request

For information on obtaining documentation, submitting a service request, and gathering additional

xvi

information, see the monthly What’s revised Cisco

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

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

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

technical documentation, at:

New in Cisco Product Documentation, which also lists all new and

OL-21561-02

CHAP T ER

Product Overview

Revised: January 4, 2012

Both the Catalyst 4948E switch and the Catalyst 4948E-F switch are 1-RU, horizontal, fixed-configuration chassis with 48 10/100/1000 downlink ports and 4 1-GB or 10-GB uplink ports. Both switches have one removable fan tray and support redundant power supplies. The primary difference between the two chassis is that the air flow in the Catalyst the rear of the chassis while the air flow in the Catalyst 4948E-F goes from the rear of the chassis to the front of the chassis. and Figure 1-2 shows the rear view of both chassis with the major features identified.

Note The fan trays and the power supplies are not interchangeable between the Catalyst 4948E and the

Catalyst 4948E-F switch chassis.

Figure 1-1 shows the front view of both chassis with the major features identified

4948E goes from the front of the chassis to

Tip For additional information about the Cisco Catalyst 4948E and the Catalyst 4948E-F switches (including

configuration examples and troubleshooting information), see the documents listed on this page:

http://www.cisco.com/en/US/products/ps6021/tsd_products_support_series_home.html

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Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

1-1

Chapter 1 Product Overview

278083

Figure 1-1 Catalyst 4948E and Catalyst 4948E-F Switches—Front View of Chassis

(Catalyst 4948E Switch Shown)

1 48 downlink ports 4 Status LEDs 2 4 uplink ports 5 Console port 3 Management port

Note The orientation of the Cisco logo shown in Figure 1-1 identifies the chassis as a Catalyst 4948E switch.

The Cisco logo that appears on the Catalyst labels are placed on the Catalyst

4948E-F top cover to denote the direction of the airflow through the

4948E-F chassis top cover is rotated 180 degrees. Additional

chassis.

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Chapter 1 Product Overview

Figure 1-2 Catalyst 4948E and Catalyst 4948E-F Switches—Rear View of Chassis

1 Power supply 1 (primary) 3 Power supply 2 (redundant) 2 Fan tray

Features

PWR - 540 AC

100 - 240 VAC

7 - 3A

50 - 60 Hz

INPUT

OUTPUT

INPUT

PWR - 540 AC

100 - 240 VAC

50 - 60 Hz

7 - 3A

OUTPUT

330680

Features

This chapter describes the Catalyst 4948E and Catalyst 4948E-F switches and includes these sections:

• Features, page 1-3

• Physical and Environmental Specifications, page 1-7

• Fan Tray, page 1-8

• Front Panel LEDs, page 1-11

Table 1-1 lists the features of the Catalyst 4948E and the Catalyst 4948E-F switch chassis.

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Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

1-3

Features

Ta b l e 1-1 Catalyst 4948E and Catalyst 4948E-F Switch Features

Feature Description

Chassis (both chassis)

Uplink ports (both chassis)

1-RU, 48 10/100/1000 ports plus 4 1-GB/10-GB ports, fixed configuration switch with redundant power supplies

The chassis has 4 1-GB or 10-GB uplink ports. An SFP or SFP+ transceiver must be installed in the chassis port socket for the port to operate. Cable type and recommended cabling distance for each port is determined by the type of SFP or SFP+ transceiver installed in the uplink port. A bicolor port link status LED is associated with each uplink port. LED colors indicate the following status:

• Green—The link is established and operational.

• Amber—The port is disabled.

• Blinking amber—The system has detected a fault with the link.

• Off—No link is established or the transceiver is not installed in the port

socket.

Chapter 1 Product Overview

Downlink ports (both chassis)

Console port (both chassis)

Ethernet management port (both chassis)

See Appendix B, “Transceiver, Chassis Connectors, and Cable and Adapter

Specifications” for supported SFP and SFP+ transceiver descriptions,

specifications, and cabling distances.

• The chassis has 48 10/100/1000BASE autonegotiating-capable

downlink ports. Each port has an RJ-45 connector. A bicolor port link status LED is associated with each port. LED colors indicate the following status:

• Green—The link is established and operational.

• Amber—The port is disabled.

• Blinking amber—The system has detected a fault with the link.

• Off—No link is established or no network interface cable is installed.

A console serial port (RJ-45) is provided for switch management using standard console equipment. Additional information including a connector pinout table is provided in

Appendix B, “Transceiver, Chassis Connectors,

and Cable and Adapter Specifications”for the console port.

Note A console cable is not provided in the accessory kit. It can be ordered

as an option.

• The Catalyst 4948E switch provides a 10/100/1000 RJ-45 port Ethernet

Management port that can be used to manage the switch through an Ethernet network. This port can also be used to download software to the switch or transfer files to remote servers for analysis or backup storage.

• The typical connection to the Management Ethernet port uses an

Ethernet cable with RJ-45 connectors at each end. The other end of the cable typically connects to an Ethernet switch, hub, or router that provides connectivity between the multishelf system and networks from which system management is desired.

Appendix B, “Transceiver, Chassis Connectors, and Cable and Adapter Specifications” contains

additional information for the Ethernet management port including a connector pinout table.

1-4

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Chapter 1 Product Overview

Table 1-1 Catalyst 4948E and Catalyst 4948E-F Switch Features (continued)

Feature Description

RESET switch (both chassis)

• Resets and restarts the switch.

• The switch is recessed on chassis front panel and requires a pointed

object to access it.

Fan tray

Catalyst 4948E chassis

• The Catalyst 4948E chassis supports one hot-swappable fan tray (part

number WS-X4993=).

Note The fan trays are not interchangeable between the Catalyst 4948E

and the Catalyst

• The fan tray has four variable-speed 12 VDC fans.

• The fan tray installs in the rear of the chassis between the two power

4948E-F chassis.

supplies.

• The fan tray for the Catalyst 4948E (WS-X4993=) is color-coded dark

grey.

• A redundant pair of thermal sensors are positioned near the air inlet

(front of the chassis) to monitor the ambient air temperature and control the fan tray fan speed.

• The airflow in the Catalyst 4948E chassis is from front to back.

• The chassis has a FAN LED (located on the chassis front panel) that

provides fan tray status.

Features

–

Red—One or more individual fans in the fan tray have failed.

–

Green—All fans in the fan tray are operating normally.

Catalyst 4948E-F chassis • The Catalyst 4948E-F chassis supports one hot-swappable fan tray (part

number WS-X4993-F=).

Note The fan trays are not interchangeable between the Catalyst 4948E

and the Catalyst

• The fan tray has four variable-speed 12 VDC fans.

• The fan tray installs in the rear of the chassis between the two power

4948E-F chassis.

supplies.

• The fan tray for the Catalyst 4948E-F is color-coded blue.

• A redundant pair of thermal sensors are positioned near the air inlet (rear

of the chassis) to monitor the ambient air temperature and control the fan tray fan speed.

• The airflow in the Catalyst 4948E-F chassis is from back to front.

• The chassis has a FAN LED (located on the chassis front panel) that

provides fan tray status.

–

Red—One or more individual fans in the fan tray have failed.

–

Green—All fans in the fan tray are operating normally.

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1-5

Features

Table 1-1 Catalyst 4948E and Catalyst 4948E-F Switch Features (continued)

Feature Description

Power supplies

Catalyst 4948E

• Supports one or two power supplies. The following power supplies are

supported:

–

PWR-C49E-300AC-R (300 W AC-input power supply).

–

PWR-C49-300DC (300 W DC-input power supply).

Note The power supplies are not interchangeable between the

Catalyst

• The front panels on both of the power supplies for the Catalyst 4948E

4948E and the Catalyst 4948E-F switch chassis.

are color-coded dark grey.

Note The 300 W AC-input power supply requires single-phase source AC.

Source AC can be out of phase between multiple power supplies because all AC power supply inputs are isolated.

Note Appendix A, “Power Supply Specifications” contains additional

information on both of the power supplies.

Chapter 1 Product Overview

Note If the redundant power supply is not installed, the empty power

supply bay should be covered using the blank power supply cover (p/n WS-X4994). The blank power supply cover is color-coded dark grey.

Catalyst 4948E-F • Supports one or two power supplies. The following power supplies are

supported:

–

PWR-C49E-300AC-F (300 W AC-input power supply, reversed air flow).

• The front panel on the power supply for the Catalyst 4948E-F is

color-coded blue.

Note The 300 W AC-input power supply requires single-phase source AC.

Source AC can be out of phase between multiple power supplies because all AC power supply inputs are isolated.

Note Appendix A, “Power Supply Specifications” contains additional

information on both of the power supplies.

Note If the redundant power supply is not installed, the empty power

supply bay should be covered using the blank power supply cover (p/n WS-X4994-F). The blank power supply cover is color-coded blue.

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Chapter 1 Product Overview

Physical and Environmental Specifications

Table 1-2 and Ta ble 1-3 lists the Catalyst 4948E and Catalyst 4948E-F switch chassis environmental and

physical specifications.

Ta b l e 1-2 Catalyst 4948E and Catalyst 4948E-F Switch Specifications - Environment, Heat Dissipation, Shock and

Vibrations, Physical Characteristics, and Airflow

Item Specification

Environmental

Temperature, operating Certified for operation: 32° to 104°F (0° to 40°C)

Designed and tested for operation: 32° to 131°F (0° to 55°C)

Temperature, nonoperating and storage

Thermal transition 0.5°C per minute (hot to cold)

Humidity (RH), ambient (noncondensing) operating

Altitude, operating Certified for operation: 0 to 6500 ft (0 to 2000 m)

Heat Dissipation 1364 BTU/hour (worst case)

Shock and Vibration Refer to Appendix D, “Regulatory Compliance and Safety Information” for

Physical Characteristics

Dimensions (H x W x D) • 1.75 x 17.5 x 19.4 in. (4.4 x 44.4 x 49.3 cm).

Chassis unpackaged: –4° to 149°F (–20° to 65°C)

Chassis in protective shipping package: –40° to 158°F (–40° to 70°C)

0.33°C per minute (cold to hot)

Operating: 5% to 90%

Nonoperating and storage: 5% to 95%

Designed and tested for operation: –200 to 10,000 ft (–60 to 3000 m)

shock and vibration compliance information for the switch.

• Chassis requires 1 RU.

• The Catalyst 4948E and the Catalyst 4948E-F switch chassis are

designed to install in standard 19-inch equipment racks that meet ANSI/EIA

310-D, IEC 60297, and ETS 300-119 standards.

Weight • 14 lb (6.35 kg). Base system; no power supplies and no fan tray.

• 19 lb (8.62 kg). Fully loaded system; two power supplies and a fan tray.

Airflow • 28 CFM (low speed)

• 44 CFM (high speed)

Ta b l e 1-3 Catalyst 4948E and Catalyst 4948E-F Switch Specifications - Acoustic Noise

Acoustic Noise Measured per ISO 7779 and declared per ISO 9296

Bystander positions operating mode at 25°C ambient.

Sound Pressure, dBA Sound Power, dBA

Model Typical, LpAm Maximum, LpAD Typical, LwA Maximum, LwAD

WS-C4948E 55.6 58.6 62.6 65.6

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1-7

Fan Tray

Note The two fan trays are not interchangeable between the Catalyst 4948E and the Catalyst 4948E-F chassis.

Chapter 1 Product Overview

Both the Catalyst 4948E and the Catalyst 4948E-F switch chassis have a fan tray that is mounted in the rear of the chassis between the two power supplies. The Catalyst 4948E chassis fan tray (WS-X4993=) provides front-to-back air flow in the chassis and has a front panel that is color-coded dark grey. The Catalyst

4948E-F chassis fan tray (WS-X4993-F=) provides back-to-front air flow and has a front panel

that is color-coded blue.

The WS-X4993-F fan tray is keyed to prevent insertion in the Catalyst 4948E chassis.

Individual fan speed within the fan trays is controlled by redundant temperature sensors located at the air flow inlet (in the front of the chassis for the Catalyst Catalyst

4948E-F). There are six programmable temperature thresholds that trigger fan speed change. If

4948E and in the rear of the chassis for the

there is an individual fan failure, the fan speed on the remaining fans is adjusted to try to compensate for the loss of the fan.

Table 1-4 lists the fan speed settings and the associated temperature thresholds.

Ta b l e 1-4 Fan Speeds Versus Chassis Temperature Thresholds

Fan Speed Setting

PWM1 Duty Cycle

Chassis Temperature Range Thresholds

Speed 0 41% T2—89.6°F (32°C)

Note At T2, the fan speed increases to Speed 1.

Speed 1 56% • T1—82.4°F (28°C)

• T4—102.2°F (39°C) Note At T1, the fan speed decreases to Speed 0. At T4, the fan

Speed 2 75% T3—95.0°F (35°C)

T6—116.6°F (47°C)

Note At T3, the fan speed decreases to Speed 1. At T6, the fan

Speed 3

1. Pulse-Width Modulation

2. Speed 3 is a fixed value and cannot be altered.

100% T5—Greater than 109.4°F (43°C)

Catalyst 4948E Fan Tray (WS-X4993=)

speed increases to Speed

1-8

The Catalyst 4948E fan tray (WS-X4993) contains four variable-speed, 12 VDC fans. (See Figure 1-3.) The fan tray is mounted in the rear of the chassis between the two power supplies.

Note The WS-X4993 fan tray is not interchangeable with the WS-X4993-F fan tray.

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Figure 1-3 Catalyst 4948E Fan Tray

1 Backplane connector 3 12 VDC fan (4X). Air is drawn in from the

2 Captive installation screw (2X)

The fan tray draws in air through vents at the front of the chassis and exhausts it through the rear of the chassis as shown in

Fan Tray

278085

front of the chassis and exhausted through the rear of the chassis.

Figure 1-4.

Figure 1-4 Catalyst 4948E Chassis Airflow

Catalyst 4948E-F Fan Tray (WS-X4993-F=)

The Catalyst 4948E-F chassis fan tray (WS-X4993-F=) contains four variable-speed, 12 VDC fans. (See

Figure 1-5.) The fan tray is mounted in the rear of the chassis between the two power supplies.

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Fan Tray

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Note The WS-X4993-F fan tray is keyed to prevent insertion into the Catalyst 4948E switch chassis.

Figure 1-5 Catalyst 4948E-F Fan Tray

278085

1 Backplane connector 3 12 VDC fan (4X). Air is drawn in from the

rear of the chassis and exhausted through the front of the chassis.

2 Captive installation screw (2X)

The fan tray draws in air through vents at the rear of the chassis and exhausts it through the front of the chassis as shown in

Figure 1-6 Catalyst 4948E-F Chassis Airflow

Figure 1-6.

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Front Panel LEDs

A set of LEDs on the chassis front panel provide visual status for the switch. (See Figure 1-7.) Tab le 1-5 lists the Catalyst 4948E and Catalyst 4948E-F switch chassis front panel LEDs and their meanings.

Figure 1-7 Front Panel LEDs

Front Panel LEDs

1 PS1 (power supply 1) 4 STATUS 2 PS2 (power supply 2) 5 MGT (management port LED) 3 FAN (fa n tray) 6 LINK (port status). One LED for each uplink

and downlink port.

Ta b l e 1-5 Front Panel LED Descriptions

LED State and Meaning

STATUS Green—The system is up and running.

Red—System fault.

Flashing amber—Power-on self-test (POST) boot

up.

Off—System is not powered up.

LINK

48 10/100/1000 downlink port LEDs and 4 SFP/SFP+ uplink port LEDs

FAN (Fan tray)

PS1 (Power supply 1)

PS2 (Power supply 2)

1. There are three additional LEDs mounted on the power supply front panel that provide power supply status. These LEDs are only visible from the back of the chassis. For a description of the LEDs, see the

(PWR-C49E-300AC-R)” section on page A-1.

Green—Link is established.

Amber—Administrative disabled.

Off—No link is detected.

Green—Fan tray OK.

Red—One or more fan failures.

Green—AC-input or DC-input power is OK.

Red—Power supply fault detected.

Green—AC-input or DC-input power is OK.

Red—Power supply fault detected.

“300 W AC-Input Power Supply

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CHAP T ER

Preparing for Installation

Revised: July 2012

Planning a proper location for the switch and the layout of your equipment rack or wiring closet is essential for successful system operation. Equipment placed too close together or inadequately ventilated can cause system overtemperature conditions. In addition, poor equipment placement can make network interface connections inaccessible and difficult to maintain.

This chapter describes how to prepare your site for switch installation and includes these sections:

• Safety, page 2-1

• Site Requirements, page 2-2

• System Grounding, page 2-7

• Power Requirements, page 2-11

• Cabling Requirements, page 2-13

Safety

• Site Preparation Checklist, page 2-13

Tip For additional information about the Cisco Catalyst 4948E or the Catalyst 4948E-F switch (including

configuration examples and troubleshooting information), see the documents listed on this page:

http://www.cisco.com/en/US/products/ps6021/tsd_products_support_series_home.html

Safety warnings appear throughout this publication in procedures that may harm you if performed incorrectly. A warning symbol precedes each warning statement. The warnings below are general warnings that are applicable to the entire publication.

Warning

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

Statement 1030

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Site Requirements

Chapter 2 Preparing for 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

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.

Site Requirements

These following sections describe some of the basic site requirements that you should be aware of as you prepare to install your Catalyst

• Rack-Mounting Guidelines, page 2-2

• Temperature, page 2-3

• Air Flow, page 2-4

• Humidity, page 2-5

• Altitude, page 2-5

Statement 1072

4948E or Catalyst 4948E-F switch:

• Dust and Particulates, page 2-5

• Corrosion, page 2-6

• Electromagnetic and Radio Frequency Interference, page 2-6

• Shock and Vibration, page 2-7

• Maintaining Safety with Electricity, page 2-9

• Preventing Electrostatic Discharge Damage, page 2-10

Rack-Mounting Guidelines

A rack-mount kit (69-2037-xx) is included in the accessory kit for mounting the switch in a standard 19-inch (48.3

• Racks with obstructions (such as power strips) that could impair access to the switch

Before rack-mounting the switch, ensure the following:

• The equipment rack is the proper size.

–

cm) equipment rack. This rack-mount kit is not suitable for use in the following situations:

The width of the rack, between the two front-mounting strips or rails, must be 17.75 inches (45.09

cm).

The depth of the rack, between the front- and rear-mounting strips, must be at least 19.25 inches (48.9

cm) but not more than 32.5 inches (82.5 cm).

The rack must have sufficient vertical clearance to insert the chassis. The chassis height is 1 U (1.75

inches (4.45 cm)).

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+ 132 hidden pages

Cisco 4948E-F, 4948E User Manual

Preface

Audience

Organization

Related Documentation

Command Syntax Conventions

Ta b l e 1 Command Syntax Guide

Obtaining Documentation and Submitting a Service Request

Product Overview

Features

Ta b l e 1-1 Catalyst 4948E and Catalyst 4948E-F Switch Features

Physical and Environmental Specifications

Ta b l e 1-3 Catalyst 4948E and Catalyst 4948E-F Switch Specifications - Acoustic Noise

Fan Tray

Ta b l e 1-4 Fan Speeds Versus Chassis Temperature Thresholds

Catalyst 4948E Fan Tray (WS-X4993=)

Figure 1-3 Catalyst 4948E Fan Tray

Figure 1-4 Catalyst 4948E Chassis Airflow

Catalyst 4948E-F Fan Tray (WS-X4993-F=)

Figure 1-5 Catalyst 4948E-F Fan Tray

Figure 1-6 Catalyst 4948E-F Chassis Airflow

Front Panel LEDs

Figure 1-7 Front Panel LEDs

Ta b l e 1-5 Front Panel LED Descriptions

Preparing for Installation

Safety

Site Requirements

Rack-Mounting Guidelines