Cisco Catalyst Express 520 Manuale di riferimento

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User Guide for the Catalyst Express 520 Switches

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CHAPTER

Introduction

Read this chapter to familiarize yourself with the features, benefits, and

capabilities of the Catalyst Express 520 switches.

Chapter Topics

•Overview, page 1-2

•Hardware Features, page 1-6

•Software Features, page 1-10

•Box Contents, page 1-14

•Supported Hardware, page 1-14

•Hardware Requirements, page 1-15

•Software Requirements, page 1-15

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Chapter 1 Introduction

Overview

The Catalyst Express 520 switches provide network services that can support the

data, voice, and mobile network demands of small and medium-sized businesses.

The services ensure transmission quality and reliability for data and voice traffic.

They also provide security to protect against network attacks.

The Catalyst Express 520 switches are designed to be

•Smart—Each switch port is applied with a specific Cisco-recommended

configuration (referred to as a Smartports port role) to optimize the switch

connections and to ensure security, transmission quality, and reliability for

traffic from the switch ports.

•Simple—Setup of the switch can be through a connection to an existing

network with a Dynamic Host Configuration Protocol (DHCP) server, such as

a Cisco Unified Communications 500 Series, or through the Express Setup

feature of the switch device manager GUI.

•Secure—The switch supports three levels of business-optimized network

security. Traffic between the switch and the network management

applications is also encrypted through the Secure Sockets Layer (SSL)

protocol.

You can simply install the switch and allow it to operate without any further

management intervention. Use device and network management tools to take

advantage of the software features and to optimize your use of the switch. With

these tools, you can quickly and easily set up, customize, monitor, and

troubleshoot the switch.

Table 1-1 describes the Catalyst Express 520 switches, and Figure 1-1 and

Figure 1-2 show the switches in network examples.

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Chapter 1 Introduction

Overview

Table 1-1 Catalyst Express 520 Switches

Catalyst Express 520-8PC-K9

This switch provides Power over Ethernet (PoE) to Cisco IP phones and wireless access points. Because

of its compact size, it can be deployed outside the traditional wiring-closet environment, such as in

office workspaces and classrooms. It has

•8 10/100 PoE ports for desktop, printer, IP phone, server, and wireless access-point connectivity

•1 dual-purpose port (one 10/100/1000BASE-T copper port and one small form-factor pluggable

[SFP] module slot) for switch, router, or server connectivity

Catalyst Express 520-24TT-K9

This switch provides standard connections to network users. It has

•24 10/100 (Fast Ethernet) ports for desktop and printer connectivity

•2 10/100/1000 (Gigabit Ethernet) ports for switch, router, or server connectivity

Catalyst Express 520-24LC-K9

This switch provides standard connections to network users and provides connections to PoE devices.

It has

•20 10/100 ports for desktop and printer connectivity

•4 10/100 PoE ports for IP phone and wireless access point connectivity

•2 dual-purpose ports for switch, router, or server connectivity

Catalyst Express 520-24PC-K9

This switch provides standard connections to network users and provides connections to PoE devices.

It has

•24 10/100 PoE ports for desktop, printer, IP phone, and wireless access point connectivity

•2 dual-purpose ports for switch, router, or server connectivity

Catalyst Express 520G-24TC-K9

This switch provides high-speed connections to servers and switches. It has

•24 10/100/1000 ports for high-speed, desktop connectivity

•2 dual-purpose ports for server aggregation or for switch, router, or server connectivity

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Chapter 1 Introduction

Overview

Cisco Smart Business Communications System Network Example

The Catalyst Express 520 switches are the recommended companion switches to

the Cisco Unified Communications 500 Series. These devices are part of the Cisco

Smart Business Communications System solution (Figure 1-1).

The Cisco Smart Business Communications System is a unified communications

solution for small businesses that provides voice, data, video, security, and

wireless capabilities while integrating with existing desktop applications such as

calendar, e-mail, and Customer Relationship Management (CRM).

Figure 1-1 Cisco Smart Business Communications System Solution

Catalyst Express Switch Network Example

Figure 1-2 is an example of how to use the different Catalyst Express switches to

enable communication between network users and to provide them access to

network resources.

Any of the Catalyst Express 520 switches can be Switches A, B, C, and D in this

network. To take full advantage of the different models of the Catalyst

Express 520 switch platform, use the one that is designed for the type of

connections that you require.

•Switches A and B: Use the Catalyst Express 520G-24TC-K9 model. It has

the most Gigabit Ethernet ports, and it is best suited to providing 1000-Mb/s

connections between switches and to servers. Multiple connections between

the switches ensure that users maintain network access if any of the switches

becomes overused or unavailable.

201608

Cisco 521

Wireless Express

Access Points

Catalyst Express 520 Switch

Cisco 526 Wireless Express

Mobility Controller

Fax

Cisco

Monitor

Director

Partner

Site

Teleworker

Site

Cisco 870 Series

Router

DSL/Cable

Modem

Internet

Cisco Unified

Communications 500 Series

Cisco

Configuration

Assistant/

Cisco Monitor

Manager

PSTN

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Chapter 1 Introduction

Overview

•Switches C and D: Use the Catalyst Express 520-24TT-K9 or the Catalyst

Express 520G-24TC-K9 model to provide high-speed (up to 100 Mb/s and

1000 Mb/s, respectively) connections to network users.

You can also use the Catalyst Express 520-24LC-K9 or the Catalyst

Express 520-24PC-K9 model to connect Cisco prestandard and IEEE

802.3af-compliant powered devices, such as IP phones and access points, to

your network. PoE connections from these switches can provide both network

access and power for up to 4 or up to 24 PoE devices, respectively.

If the switch detects that there is no power on the circuit, the PoE ports

provide up to 15.4 W of power to attached PoE devices. You can place PoE

devices where power outlets are not available or are not convenient and thus

avoid cabling costs.

You can manage the network onsite or remotely through the Cisco Configuration

Assistant network management application. Through Cisco Configuration

Assistant, you can also optimize the switches. For example, you can configure

VLANs that give priority to voice traffic over regular data traffic from the desktop

devices attached to the IP phones. Other VLANs can provide different types of

network users—wired employees, wireless (or mobile) employees, and wired and

wireless company visitors—with different access levels to the company network.

Figure 1-2 Catalyst Express Switch Network Example

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Chapter 1 Introduction

Hardware Features

Figure 1-3 and the list that follows describe the switch hardware features and the

benefits that they provide. For hardware installation information, see Chapter 3,

“Installing the Switch.”

Figure 1-3 Hardware Features

1 AC power

connector

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.

2RPS

connector

Depending on the Catalyst Express 520 model, a Cisco RPS 675 can be

connected to the switch. The RPS is a redundant power system that automatically

senses when the internal power supply of a connected device fails and provides

power to prevent the loss of network traffic. For complete information about the

RPS, see the Cisco RPS 675 Redundant Power System Hardware Installation

Guide on Cisco.com.

Warning

Attach only the Cisco RPS (model PWR675-AC-RPS-N1=) to the RPS

receptacle.

Statement 100C

3 Security slot The security slots are on the left and right side panels. You can install an optional

cable lock, such as the type that is used to secure a laptop computer, to secure

either or both sides of the switch.

POWER

OVER

ETHERNET

SYSTEM

ALERT

PoE

ADMIN

RPS

Catalyst Express 520

Series

710

912

11 14

13 16

15 18

17 20

19 22

21 24

SYSTEM

ALERT

PoE

ADMIN

RPS

202199

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Chapter 1 Introduction

Hardware Features

4 SYSTEM LED The SYSTEM LED shows the status of the switch (system).

Solid green Switch is healthy.

Blinking green Switch is running power-on self-test (POST). POST is a series

of tests that runs automatically to ensure that the switch

functions properly. It might take several minutes for the switch

to complete POST.

Solid amber Switch is faulty, is rebooting, or is in recovery.

5ALERTLED The ALERT LED shows the presence of a switch problem.

When the switch detects a problem on one or more ports, the Alert LED turns

amber. The Alert LED stays amber until the Alert Log is cleared. For more

information about the Alert LED and Alert Log, see Table 6-1 and the “Review

the Alert Log” section on page 6-8.

Off (dark) No switch problem is detected.

Solid amber A switch problem is detected.

6 PoE LED The PoE LED shows the status of PoE being provided to the ports.

This LED is available on switches that have PoE ports.

Off (dark) PoE to the ports is off.

Solid green One or more ports is receiving PoE.

Blinking amber One or more ports is not receiving PoE because of a fault.

7RPSLED The RPS LED shows the status of a connected redundant power system (RPS).

This LED is available on switches that have an RPS connector.

Off (dark) RPS is off or is not properly connected.

Solid green RPS is connected and is ready to provide back-up power.

Blinking green RPS is connected but is unavailable because it is providing

power to another device.

Solid amber RPS is in standby mode or is in a fault condition.

Blinking amber Switch internal power supply has failed, and the RPS is

providing power to the switch.

Chapter 1 Introduction

Hardware Features

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8ADMINLEDThe ADMIN LED shows the management mode in which the switch is operating.

Off (dark) Switch is configured with an IP address.

Blinking green Switch is in the initial setup mode, or the switch is in direct

managed mode. For information about this mode, see the

“Device Manager Is Not Accessible Through the Network”

section on page 7-4.

9 ADMIN button The ADMIN button is used to manage the switch through a direct connection to

your PC or laptop and is used to start the recovery on the switch.

10 Uplink ports Depending on the Catalyst Express 520 model, the uplink ports can be

dual-purpose ports or 10/100/1000 ports. For information about 10/100/1000

ports, see Downlink ports.

The dual-purpose port can be used as either a 10/100/1000 port or as an SFP

module port. However, both cannot be active at the same time. If both ports are

connected, the SFP module port has priority. You cannot change this priority

setting.

The SFP module slot supports Gigabit Ethernet SFP modules to establish

fiber-optic and 1000BASE-T uplink connections. It supports the modules listed

in the “Supported Hardware” section on page 1-14.

11 Downlink

ports

Depending on the Catalyst Express 520 model, the downlink ports can be 10/100

PoE ports, 10/100 ports, or 10/100/1000 ports.

You can set these ports for speed and duplex autonegotiation, in compliance with

IEEE 802.3ab, to optimize port bandwidth.

If the connected device also supports autonegotiation, the switch port negotiates

the best connection (the fastest line speed that both devices support and

full-duplex transmission if the attached device supports it) and configures itself

accordingly. The default setting is autonegotiate.

The ports also have the automatic-medium-dependent interface crossover

(auto-MDIX) capability to automatically detect the required cable connection

type (straight-through or crossover) and to configure the connection

appropriately.

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Chapter 1 Introduction

Hardware Features

The PoE ports provide up to 15.4 W of power to connected Cisco prestandard

and IEEE 802.3af-compliant powered devices if the switch detects that there is

no power on the circuit. On a per-port basis, through the Cisco Configuration

Assistant, you can control whether the PoE port automatically provides power

when a powered device is connected. By default, the setting is Auto.

Note On the Catalyst Express 520-24LC-K9 switch, ports 1 to 4 are PoE ports.

Use the Cisco Configuration Assistant to change the port settings.

12 Port LEDs The port LEDs show port status, port duplex mode, port speed, and PoE status.

By default, the port LEDs show port status.

Use the Cisco Configuration Assistant to change and to monitor the port settings.

Note To display the port duplex mode, the port speed, and the PoE status from

the port LEDs, you must use the View list from the device manager. See

Table 6-2 and the device manager online help for information about the

View list.

Port Status Off (dark) No link.

Solid green Link is up, but there is no activity on the link.

Blinking green Link has activity.

During direct managed mode, the port with the blinking green

LED is the selected management port to which to connect your

PC or laptop.

Blinking green

and amber

Link is faulty.

Blinking amber Port has a Smartports configuration mismatch.

Solid amber Port is faulty or is disabled due to an error condition.

Chapter 1 Introduction

Software Features

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Software Features

The switch software features are accessible from these management interfaces:

•Device Manager, page 1-10

•Cisco Configuration Assistant, page 1-13

A subset of the basic software features are accessible through the device manager.

All software features are accessible through the Cisco Configuration Assistant.

Device Manager

The device manager is a graphical device management tool for basic setup,

monitoring, and troubleshooting of individual switches.

The device manager displays real-time views of switch configuration and

performance. It simplifies configuration tasks with features such as Express Setup

for quickly setting up the switch. It uses graphical, color-coded displays, such as

the Front Panel view, graphs, and animated indicators to simplify monitoring

tasks. It provides alert tools to help you to identify and to solve networking

problems.

You can display the device manager (Figure 1-4) from anywhere in your network

through a web browser such as Microsoft Internet Explorer. For information on

how to display the device manager, see Chapter 2, “Setting Up the Switch.”

Table 1-2 lists the software features accessible through the device manager.

Complete details about the device manager and the procedures for using the

device manager windows are available from the device manager online help.

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