Dell PowerConnect 2608 Manuale utente

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Dell™ PowerConnect™ 26

Switches

User’s Guide

Notes, Notices, and Cautions

NOTE: A NOTE indicates important information that helps you make better use of your computer.

NOTICE: A NOTICE indicates either potential damage to hardware or loss of data and tells you how to

avoid the problem.

CAUTION: A CAUTION indicates a potential for property damage, personal injury, or death.

____________________

Information in this document is subject to change without notice.

Reproduction in any manner whatsoever without the written permission of Dell Inc. is strictly forbidden.

Trademarks used in this text: Dell, the DELL logo, Inspiron, Dell Precision, Dimension, OptiPlex, Latitude, PowerEdge,

PowerVault,PowerApp,Axim,DellNet, and PowerConnect are trademarks of Dell Inc.

Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or

their products. Dell Inc. disclaims any proprietary interest in trademarks and trade names other than its own.

Models PowerConnect 2608, PowerConnect 2616, PowerConnect 2624

October 2003 Rev. A00

Contents 3

Contents

1 Introduction

Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Front Panel Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Power (POWER) LED . . . . . . . . . . . . . . . . . . . . . . . . . 6

10/100/1000 Ports Link/Activity (SPD/LNK/ACT) LED . . . . . . . . . . . 6

10/100/1000 Ports Duplex Mode/Collisions (FDX/HDX) LED . . . . . . . . 6

Connecting Devices . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

RJ-45 Switch Ports . . . . . . . . . . . . . . . . . . . . . . . . . . 8

SFP Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Connecting Switches to Each Other . . . . . . . . . . . . . . . . . . 8

Connecting Switches to Systems. . . . . . . . . . . . . . . . . . . . 9

Class-of-Service. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Mounting Kit Instructions . . . . . . . . . . . . . . . . . . . . . . . . . 10

Installing the Switch on a Flat Surface . . . . . . . . . . . . . . . . . 10

Installing the Switch in a Rack . . . . . . . . . . . . . . . . . . . . . 10

Installing the Switch on a Wall . . . . . . . . . . . . . . . . . . . . . 11

Technical Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2 Troubleshooting

3 Getting Help

Technical Assistance . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Online Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

AutoTech Service . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Automated Order-Status Service. . . . . . . . . . . . . . . . . . . . 18

Technical Support Service. . . . . . . . . . . . . . . . . . . . . . . 19

Dell Enterprise Training and Certification . . . . . . . . . . . . . . . . . . 19

Problems With Your Order . . . . . . . . . . . . . . . . . . . . . . . . . 19

Product Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

4Contents

Returning Items for Warranty Repair or Credit. . . . . . . . . . . . . . . . 19

Before You Call . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Contacting Dell . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figures

Figure 1-1. PowerConnect 2608 . . . . . . . . . . . . . . . . 7

Figure 1-2. PowerConnect 2616 . . . . . . . . . . . . . . . . 7

Figure 1-3. PowerConnect 2624 . . . . . . . . . . . . . . . . 8

Figure 1-4. Cascading Switches . . . . . . . . . . . . . . . . 9

Figure 1-5. Brackets for Rack Installation . . . . . . . . . . . 11

Figure 1-6. Brackets for Wall Installation . . . . . . . . . . . 12

Tables

Table 1-1. Tag-Based Prioritization . . . . . . . . . . . . . . 9

Table 1-2. Specifications . . . . . . . . . . . . . . . . . 12

Table 2-1. Basic Troubleshooting . . . . . . . . . . . . . . 15

Introduction 5

Introduction

Dell

™

PowerConnect

™

switches provide 10/100/1000-Mbps Gigabit Ethernet connectivity.

The switches have the following features:

• 10/100/1000-Mbps switch ports

– 8 ports (PowerConnect 2608)

– 16 ports (PowerConnect 2616)

– 24 ports, including one combination RJ-45/small form factor (SFP) port

(PowerConnect 2624)

• Complies with IEEE 802.3 10Base-T, IEEE 802.3u 100Base-TX, IEEE 802.3z/ab 1000Base-T

• Tag-based IEEE 802.1p Class-of-Service with two priority queues per port

• IEEE 802.3x PAUSE frames flow control in full-duplex operation

• Automatic negotiation for speed and full- and half-duplex mode on all ports

• Backpressure flow control in half-duplex operation

• Collision detection on all ports

• Auto MDI/MDIX

• 4K MAC address entries supported

• Comprehensive LED indicator panel to monitor overall switching condition

• 19-inch rackmountable and wallmountable, standard 1U chassis

• Internal power supply

Package Contents

Before you install a switch, verify that your package contains the following items:

•Switch

• Self-adhesive rubber pads for desktop installation

• Kit for 19-inch rack installation

• Kit for wallmount installation of 16- and 24-port switches

•

PowerConnect 26xx Switches

•ACpowercord

6Introduction

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Front Panel Indicators

All 26

switches contain two rows of LEDS that provide information about connection speed, data

activity, and duplex operation mode.

Power (POWER) LED

• Green — The switch is powered on.

• Off — The switch is not powered on.

10/100/1000 Ports Link/Activity (SPD/LNK/ACT) LED

• Steady green — A 1000-Mbps link has been established, but no data is being transmitted or

received.

• Blinking green — A 1000-Mbps link has been established and data is being transmitted or

received.

• Steady amber — A 10-Mbps or 100-Mbps link has been established, but no data is being

transmitted or received.

• Blinking amber — A 10-Mbps or 100-Mbps link has been established and data is being

transmitted or received.

• Off — No link established.

10/100/1000 Ports Duplex Mode/Collisions (FDX/HDX) LED

• Steady green — The port is operating in full-duplex mode.

• Blinking green — Collisions are occurring on the port.

• Off — The port is operating in half-duplex mode.

Introduction 7

Figure 1-1. PowerConnect 2608

Figure 1-2. PowerConnect 2616

power LED

SPD/LNK/ACT LEDs

FDX/HDX LEDs

RJ-45 ports

FDX/HDX LEDs

PD/LNK/ACT LEDs

power LED

8Introduction

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Figure 1-3. PowerConnect 2624

Connecting Devices

RJ-45 Switch Ports

RJ-45 connectors are located on the front panel of the switch.

NOTE: Ensure that Category 5E (CAT 5E) cabling is used for connecting devices at 1000-Mbps Gigabit

Ethernet speed.

All ports can negotiate full- and half-duplex modes automatically. These switching ports allow users

to connect the switches to 10Base-T, 100Base-TX and 1000Base-T devices.

SFP Port

On the 24-port switch, you can use the SFP port to connect to a device that is more than

100 meters away. However, using the SFP port disables the RJ-45 connector of port 24 on the

switch.

Connecting Switches to Each Other

Each port supports Auto MDI and MDIX functionality. When cascading with other switches or

hubs, each port can connect directly to a switch or hub with straight-through twisted-pair cable

(see Figure 1-4).

RJ-45 ports

power LED

FDX/HDX LEDs

SPD/LNK/ACT LEDs

SFP port

Introduction 9

NOTE: Do not connect two switches together with more than one cable. Using multiple cables to

connect switches can create a loop and cause collisions.

Figure 1-4. Cascading Switches

Connecting Switches to Systems

By connecting a switch to systems, you can form a small network. To improve network efficiency,

use 1000-Mbps full-duplex operation between the server and switch if the LAN adapter on the

server can operate in full-duplex mode.

All the RJ-45 ports support Auto MDI/MDIX and therefore automatically detect the type of cable

used to connect the network device. Crossover or straight-through networking cables can be used

to connect PCs as well as other networking devices like hubs or routers to the switch. All ports on

the switch automatically negotiate speed and whether to operate in full duplex or half duplex.

Class-of-Service

The switch supports tag-based prioritization following the IEEE 802.1p standard. The eight levels

of IEEE 802.1p priority are mapped to the two priority queues of each port. For each port, the two

priority queues are scheduled following a Weighted Round Robin scheme.

NOTE: The IEEE 802.1p priority information is part of the IEEE 802.1q tag that also defines VLAN

memberships. The switches will ignore the VLAN membership information in the tag (that is, all ports are

part of all VLANs), but will preserve the full tag information—including packet priority and VLAN ID—

when transmitting the packet at the destination port.

Table 1-1. Tag-Based Prioritization

IEEE 802.1p Priority Priority Queue Scheduling Weight

0-3 0 1

4-7 1 2

10 Introduction

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Mounting Kit Instructions

These switches come with mounting brackets and screws for rackmounting or wallmounting and

rubber feet for stationing on a flat surface.

Installing the Switch on a Flat Surface

The switch can be installed on any appropriate level surface that can safely support the weight of

the switches and their attached cables. There must be adequate space around the switch for

ventilation and access to cable connectors.

To install the switch on a flat surface, complete the following steps:

Set the switch on the flat surface and check for proper ventilation.

Allow at least 5.1 cm (2 inches) on each side for proper ventilation and 12.7 cm (5 inches) at

the back for power cable clearance.

Attach rubber feet on each marked location on the bottom of the chassis.

The rubber feet are optional, but are recommended to keep the switch from slipping.

Installing the Switch in a Rack

The switch can be installed in Dell PowerEdge™ racks, which are 48.3 cm (19 inches). It can also be

installed in most other standard 19-inch racks and most telco two-post racks.

NOTE: Do not install rubber feet on the switch if you are rackmounting the switch.

To install the switch in a rack, complete the following steps:

Use the supplied screws to attach a mounting bracket to each side of the switch (see

Figure 1-5).

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