Cisco SF 100D-08 Manuale utente

Quick Start Guide

Cisco Small Business

Cisco Unmanaged Rackmount Switches

Package Contents

•Cisco SF 100-16, SF 100-24, SF 102-24, SG 100-16, SG 100-24,

or SG 102-24 Unmanaged Rackmount Switch

•Rackmount Kit

•Power Cord

•This Quick Start Guide

1 Cisco Unmanaged Rackmount Switches

Welcome

Thank you for choosing the Cisco SF 100-16, SF 100-24, SF 102-24,

SG 100-16, SG 100-24, or SG 102-24 Unmanaged Rackmount Switch, a

Cisco Small Business network communications device.

This guide will familiarize you with the layout of the unmanaged rackmount

switch and describe how to deploy the device in your network. For

additional information, see www.cisco.com/smb.

Network Speed and Auto MDI/MDI-X Detection

All ports support network speed auto-negotiation and auto MDI/MDI-X

crossover detection. Network speed auto-negotiation automatically

selects the best connection speed and mode (half- or full-duplex) for

communicating with attached devices. Auto MDI/MDI-X crossover

detection automatically adjusts for the cable type (straight-through or

crossover) used to connect the unmanaged rackmount switch to other

devices.

Green Energy–Efficient Technology

SG 100-16, SG 100-24, and SG 102-24 switches support Green Energy-

efficient Technology that increases energy efficiency and helps

businesses to use less energy and save money.

Traffic Prioritization

The unmanaged rackmount switches deliver Quality of Service (QoS); all

received packets are examined for QoS priority encoding. The switch

reads the priority level and forwards the packet based on that priority

level. For example, during heavy loads voice and video traffic are given

priority over data traffic. This ensures that time-sensitive traffic gets the

highest level of service.

Jumbo Frame Support

SG 100-16, SG 100-24, and SG 102-24 switches support frames up to

9,000 bytes called jumbo frames. Jumbo Frame support improves

network throughput and reduces CPU utilization during large file transfers,

such as multimedia files, by allowing larger payloads in each packet.

Cisco Unmanaged Rackmount Switches 2

Installing the Cisco Switch

There are three ways to physically install the switch:

• Set the switch on a flat surface.

• Mount the switch in a standard rack (1U high).

•Mount the switch on a wall.

Before you install the Unmanaged Rackmount Switch, follow the guidelines

in this section.

When you choose a location for the switch, consider the following

guidelines:

•Make sure that the switch is accessible and that the cables can be

connected easily.

•Keep cabling away from sources of electrical noise, power lines, and

fluorescent lighting fixtures.

•Position the switch away from water and moisture sources.

• To ensure adequate air flow around the switch, be sure to provide a

minimum clearance of two inches (50 mm).

•Do not stack free-standing switches more than four units high.

Do not deploy the device in a location where any of the following

conditions exist:

High Ambient Temperature—The ambient temperature must not

exceed 104 degrees Fahrenheit (40C).

Reduced Air Flow—Both side panels must be unobstructed to prevent

overheating.

Mechanical Overloading—The device should be level, stable, and

secure to avoid it sliding or shifting out of position.

Circuit Overloading—Adding the device to the power outlet must not

overload that circuit.

3 Cisco Unmanaged Rackmount Switches

Rack-Mount Placement

Follow these steps to rack-mount the switch in any standard 19-inch rack.

STEP 1Place the switch on a hard, flat surface with the front panel facing

towards you.

STEP 2Attach a rack–mount bracket to one side of the switch with the

supplied screws and secure the bracket tightly. Repeat this step to

attach the other bracket to the opposite side of the switch.

STEP 3After the brackets are attached to the switch, use suitable screws

to securely attach the brackets to any standard 19-inch rack.

Wall Mounting

A Cisco SF 100-16, SF 100-24, SG 100-16, or SG 102-24 Unmanaged

Rackmount Switch can be wall-mounted.

Before you begin, you need 2 wallboard screws (included) to mount the

unmanaged rackmount switch. We recommend using screws with a

minimum of 4mm width at the head and a shaft diameter of at least 1.5mm.

WARNING Insecure mounting might damage the device or cause injury.

Cisco is not responsible for damages incurred by insecure wall-

mounting.

To mount the unmanaged rackmount switch to the wall:

STEP 1Determine where you want to mount the unmanaged rackmount

switch. Verify that the surface is smooth, flat, dry, and sturdy.

STEP 2Drill two pilot holes into the surface 3.74 inches (95 mm) apart, and

with a minimum of 5.12 inches (130 mm) of clearance.

1234 5678 9101112

13 14 15 16 17 18 19 20 21 22 23 24 miniGBIC1

(Shared with 12) (Shared with 24)

miniGBIC2

Cisco Small Business

SR2024

24-Port

10/100/1000 Switch

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

miniGBIC1

Link/Act

Gigabit

Link/Act

Gigabit

SYSTEM

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

miniGBIC2

193086

Cisco Unmanaged Rackmount Switches 4

STEP 3Insert a screw into each hole, leaving a gap between the surface

and the base of the screw head of at least 0.1 inches (3 mm).

STEP 4Place the unmanaged rackmount switch wall-mount slots over the

screws and slide the unmanaged rackmount switch down until the

screws fit snugly into the wall-mount slots.

Connecting Network Devices

The application diagram is an example of a typical network configuration.

276583

123 4 5678 9101112

13 14 15 16 17 18 19 20 21 22 23 24 miniGBIC1

(Shared with 12) (Shared with 24)

miniGBIC2

Cisco Small Business

SR2024

24-Por t

10/100/ 1000 Swit ch

1 2 3 4 5 6 7 8 9 1 0 1 1 12 /

miniGBIC1

Link/Act

Gigabit

Link/Act

Gigabit

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

miniGBIC2

193803

5 Cisco Unmanaged Rackmount Switches

To connect the unmanaged rackmount switch to the network:

STEP 1Connect the Ethernet cable to the Ethernet port of a computer,

printer, network storage, or other network device.

STEP 2Connect the other end of the network Ethernet cable to one of the

numbered unmanaged rackmount switch Ethernet ports.

The LED of the port lights if the device connected is active.

NOTE If the uplink from one unmanaged, cascaded switch to another is

moved from one port to another port, it can take up to five

minutes for full network operation to resume. This is normal and

expected behavior.

STEP 3Repeat Step 1 and Step 2 for each device you want to connect to

the unmanaged rackmount switch.

NOTE To prioritize voice or video traffic by using the QoS feature on the

switch, set flow control to off in the configurations of the

connected devices. Otherwise, flow control might send a pause

frame to the switch, blocking the high-priority QoS packets

queued on the port. On some devices, such as some IP phones

and IP cameras, flow control might not be configurable.

STEP 4Connect the power cord to the switch and a power source.

Cisco Unmanaged Rackmount Switches 6

Features of the Unmanaged

Rackmount Switch

This section describes the exterior of the unmanaged rackmount switches

that provide non-blocking, wire-speed switching for your network clients.

Front Panel Ports

The ports and LEDs are located on the front panel of the switch.

RJ-45 Ethernet Ports —Use these ports to connect network devices, such

as computers, printers, and access points, to the switch. The auto-sensing,

Ethernet (802.3) ports are used for wired network communications. Each

Ethernet port supports network speeds of 10 Mbps, 100 Mbps, or

1000 Mbps.

MiniGBIC (if present)—The miniGBIC (gigabit interface converter) ports are

connection points for miniGBIC modules, so the unmanaged rackmount

switch can uplink to other switches by using optical fiber.

•MiniGBIC ports are compatible with Cisco miniGBIC modules MGBSX1,

MGBLH1, MGBT1, MGBLX1, and MGBBX1, as well as other brands of

miniGBIC modules.

• MiniGBIC interface is a combination port, shared with one other RJ-45

interface. When the MiniGBIC is active, the closest RJ-45 port is

disabled.

•The LEDs on RJ-45 respond to the miniGBIC interface traffic.

Front Panel LEDs

System LED—Lights green when the switch is powered on.

Link/Act LED—(Green) Lights when a link between the corresponding port

and another device is detected. Flashes when the port is passing traffic.

276579

14 315 416 517 618 719 820 921 10 22 11 23 12 24131 2

LINK GIGABIT

ACT

7 Cisco Unmanaged Rackmount Switches

100M LED (if present)—(Green) Lights and remains lit when another device

is connected to the port, is powered on, and a 100 Mbps link is established

between the devices. When the LED is off, the connection speed is under

100 Mbps or nothing is cabled to the port.

Gigabit LED (if present)—Lights and remains lit when another device is

connected to the port, is powered on, and a 1000 Mbps link is established

between the devices. When the LED is off, the connection speed is under

1000 Mbps or nothing is cabled to the port.

MiniGBIC (if present)—Lights green when a connection is made through

the shared RJ-45 port. It flashes green when the connection is active.

Back Panel

The power port is located on the back panel of the unmanaged rackmount

switch.

Side Panel

The Kensington lock is located on the side panel of the unmanaged

rackmount switch. (Only the Cisco SF 100-16, SF 100-24, SG 100-16, or

SG 102-24 Unmanaged Rackmount Switch has a lock.)

276580

POWER

276581

Cisco Unmanaged Rackmount Switches 8

Specifications

The following tables list the specifications for the unmanaged rackmount

switches.

Weights and Dimensions

Model Weight Dimensions mm Dimensions

Inch

SF 100-16

16 RJ-45 10/100 ports

1.251 Kg

2.758 lbs

279.4x44.45x170 11x1.75x6.7

SF 100-24

24 RJ-45 10/100 ports

1.322 Kg

2.915 lbs

279.4x44.45x170 11x1.75x6.7

SF 102-24

24 RJ-45 10/100 ports,

2 shared Gigabit

RJ-45/miniGBIC ports

1.995 Kg

4.398 lbs

440x44.45x202.5 17.35x1.74x7.99

SG 100-16

16 RJ-45 10/100/1000 ports

1.429 Kg

3.150 lbs

279.4x44.45x170 11x1.75x6.7

SG 100-24

24 RJ-45 10/100/1000 ports

2.292 Kg

2.292 lbs

440x44.45x202.5 17.35x1.74x7.99

SG 102-24

24 RJ-45 10/100/1000 ports,

2 miniGBIC uplinks

1.629 Kg

3.591 lbs

279.4x44.45x170 11x1.75x6.7

9 Cisco Unmanaged Rackmount Switches

Features

Feature Description

Standards IEEE 802.3, 802.3u, 802.3x, 802.3ab, 802.3z,

and 802.1p

Cabling Type Category 5 or better

Physical Security Kensington security slot on a

Cisco SF 100-16, SF 100-24, SG 100-16, or

SG 102-24 Unmanaged Rackmount Switch

Power 100V-240V~ 1A 50-60 Hz

Certification FCC Class A, CE

Operating Temperature 32 to 104ºF (0 to 40ºC)

Storage Temperature -4 to 158ºF (-20 to 70ºC)

Operating Humidity 10% to 90% Relative Humidity,

noncondensing

Storage Humidity 10% to 90% Relative Humidity,

noncondensing

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