MRV Communications MR2228-S2C Manuale utente

MR2228-S2C

Stackable Fast Ethernet Switch

Installation Guide

Installation GMMMMMM

InstallationGuide

Stackable Fast Ethernet Switch

with 24 10BASE-T/100BASE-TX (RJ-45) Ports,2 1000BASE-T Combination Ports

(RJ-45/SFP),and 2 1000BASE-T/Stacking Ports

MR2228-S2C

Contents

Chapter 1: Introduction............................................................................................................1

Overview..........................................................................................................................1

Switch Architecture ...................................................................................................1

Network Management Options .................................................................................2

Description of Hardware ..................................................................................................2

10BASE-T/100BASE-TX Ports .................................................................................2

1000BASE-T/SFP Ports............................................................................................2

Stacking Ports...........................................................................................................3

Port and System Status LEDs ..................................................................................3

Power Supply Receptacles.......................................................................................5

Features and Benefits......................................................................................................6

Connectivity ..............................................................................................................6

Expandability ............................................................................................................6

Performance .............................................................................................................6

Management.............................................................................................................7

Chapter 2: Network Planning ..................................................................................................8

Introduction to Switching..................................................................................................8

Application Examples.......................................................................................................8

Collapsed Backbone.................................................................................................8

Network Aggregation Plan ........................................................................................9

Remote Connections with Fiber Cable ...................................................................10

Making VLAN Connections..................................................................................... 11

Application Notes...........................................................................................................12

Chapter 3: Installing the Switch.............................................................................................13

Selecting a Site.............................................................................................................. 13

Ethernet Cabling ............................................................................................................13

Equipment Checklist ......................................................................................................14

Package Contents ..................................................................................................14

Optional Rack-Mounting Equipment ....................................................................... 14

Mounting ........................................................................................................................14

Rack Mounting........................................................................................................ 15

Desktop or Shelf Mounting......................................................................................16

Installing an Optional SFP Transceiver.......................................................................... 17

Connecting Switches in a Stack.....................................................................................17

Connecting to a Power Source ......................................................................................18

Connecting to the Console Port .....................................................................................19

Wiring Map for Serial Cable....................................................................................19

Chapter 4: Making Network Connections.............................................................................. 21

Connecting Network Devices......................................................................................... 21

Twisted-Pair Devices .....................................................................................................21

Cabling Guidelines.................................................................................................. 21

Connecting to PCs, Servers, Hubs and Switches...................................................21

Network Wiring Connections...................................................................................22

Fiber Optic SFP Devices................................................................................................23

Connectivity Rules .........................................................................................................24

1000BASE-T Cable Requirements .........................................................................24

1000 Mbps Gigabit Ethernet Collision Domain .......................................................25

100 Mbps Fast Ethernet Collision Domain..............................................................25

10 Mbps Ethernet Collision Domain........................................................................25

Cable Labeling and Connection Records.......................................................................25

Appendix A: Troubleshooting ................................................................................................ 27

Diagnosing Switch Indicators.........................................................................................27

Power and Cooling Problems ........................................................................................27

Installation......................................................................................................................28

In-Band Access..............................................................................................................28

Stack Troubleshooting ...................................................................................................28

Appendix B: Cables...............................................................................................................29

Twisted-Pair Cable and Pin Assignments ......................................................................29

10BASE-T/100BASE-TX Pin Assignments.............................................................29

Straight-Through Wiring..........................................................................................30

Crossover Wiring ....................................................................................................30

1000BASE-T Pin Assignments ...............................................................................31

Fiber Standards .............................................................................................................32

Chapter 1: Introduction

Overview

The MR2228-S2C switch is a stackable Fast Ethernet switch with 24

10BASE-T/100BASE-TX ports and two 1000BASE-T ports that operate in

combination with two Small Form Factor Pluggable (SFP) transceiver slots. The

switch also provides two 1 Gbps built-in stacking ports for connecting up to eight

units in one stack. The stacking ports can also be used as normal Ethernet ports

in standalone mode. The MR2228-S2C also includes an SNMP-based

management agent, which provides both in-band and out-of-band access for

managing the switch.

The MR2228-S2C provides a broad range of powerful features for Layer 2

switching, delivering reliability and consistent performance for your network traffic.

It brings order to poorly performing networks by segregating them into separate

broadcast domains with IEEE 802.3Q compliant VLANs, and empowers

multimedia applications with multicast switching and CoS services.

Figure 1-1. Front and Rear Panels

Switch Architecture

The MR2228-S2C employs a wire-speed, non-blocking switching fabric. This

permits simultaneous wire-speed transport of multiple packets at low latency on

all ports. The switch also features full-duplex capability on all ports, which

effectively doubles the bandwidth of each connection.

The switch uses store-and-forward switching to ensure maximum data integrity.

With store-and-forward switching, the entire packet must be received into a buffer

and checked for validity before being forwarded. This prevents errors from being

propagated throughout the network.

The switch includes built-in stacking ports that enable up to eight units that can

be connected together through a 1 Gbps stack backplane. The switch stack can

be managed from a master unit using a single IP address.

Network Management Options

With a comprehensive arrangment of LEDs, the MR2228-S2C provides “at a

glance” monitoring of network and port status. The switch can be managed over

the network with a web browser or Telnet application, or via a direct connection to

the console port. The switch includes a built-in network management agent that

allows it to be managed in-band using SNMP or RMON (Groups 1, 2, 3, 9)

protocols. It also has an RS-232 serial port (DB-9 connector) on the front panel for

out-of-band management. A PC may be connected to this port for configuration

and monitoring out-of-band via a null-modem serial cable. (See Appendix B for

wiring options.)

For a detailed description of the advanced features, refer to the Management

Guide.

Description of Hardware

10BASE-T/100BASE-TX Ports

The MR2228-S2C base unit contains 24 10BASE-T/100BASE-TX RJ-45 ports. All

ports support automatic MDI/MDI-X operation, so you can use straight-through

cables for all network connections to PCs or servers, or to other switches or

hubs.(See “10BASE-T/100BASE-TX Pin Assignments” on page B-1.)

Each of these ports support auto-negotiation, so the optimum transmission mode

(half or full duplex), and data rate (10, or 100 Mbps) can be selected automatically.

If a device connected to one of these ports does not support auto-negotiation, the

communication mode of that port can be configured manually.

Each port also supports IEEE 802.3x auto-negotiation of flow control, so the

switch can automatically prevent port buffers from becoming saturated.

1000BASE-T/SFP Ports

These are combination Gigabit RJ-45 ports with shared Small Form Factor

Pluggable (SFP) transceiver slots. If an SFP transceiver (purchased separately) is

installed in a slot and has a valid link on the port, the associated RJ-45 port is

disabled.

The 1000BASE-T RJ-45 ports support automatic MDI/MDI-X operation, so you

can use straight-through cables for all network connections to PCs or servers, or

to other switches or hubs. (See “1000BASE-T Pin Assignments” on page B-3.)

Stacking Ports

The unit provides two stacking ports that provide a 1 Gbps stack backplane

connection. Up to eight switches can be connected together using Category 5

Ethernet cables (purchased separately). The Master button enables one switch in

the stack to be selected as the master. This is the unit through which you manage

the entire stack.

The stacking ports can also be used as normal Ethernet ports in standalone mode

by pressing the Uplink button.

Figure 1-2. Stacking Ports

Port and System Status LEDs

The MR2228-S2C base unit includes a display panel for key system and port

indications that simplify installation and network troubleshooting. The LEDs, which

are located on the front panel for easy viewing, are shown below and described in

the following tables.

Table 1-1. Port Status LEDs

LED Condition Status

Fast Ethernet Ports (Ports 1-24)

On/Flashing

Amber

Port has established a valid 10 Mbps network

connection.

Flashing indicates activity.

On/Flashing

Green

Port has established a valid 100 Mbps network

connection.

Flashing indicates activity.

(Link/Activity)

Off There is no valid link on the port.

Gigabit Ethernet Ports (Ports 25-26 and Ports 27-28 when stacking is not

implemented)

On/Flashing

Amber

Port has established a valid 10/100 Mbps network

connection.

Flashing indicates activity.

On/Flashing

Green

Port has established a valid 1000 Mbps network

connection

Flashing indicates activity.

(Link/Activity)

Off There is no valid link on the port.

Table 1-2. System Status LEDs

LED Condition Status

On Green The unit’s internal power supply is operating

normally.

On Amber The unit’s internal power supply has failed.

PWR

Off The unit has no power connected.

On Green The system diagnostic test has completed

successfully.

Flashing

Green

The system diagnostic test is in progress.

Diag

On Amber The system diagnostic test has detected a fault.

Green A redundant power unit is attached and is in backup

or active mode.

Amber There is a fault in the redundant power unit.

RPU

Off There is no redundant power unit currently

attached.

Flashing

Amber

An initial power-on state during which the stack

configuration is detected.

Green This switch is acting as the Master unit in the stack.

Amber This switch is acting as a Slave unit in the stack.

Stack

Flashing

Green

When the user enters the light unit command in

the CLI, the unit ID of each switch in the stack will

be displayed by the port LEDs 1 to 8.

Power Supply Receptacles

There are two power receptacles on the rear panel of the switch. The standard

power receptacle is for the AC power cord. The receptacle labeled “RPU” is for

the optional Redundant Power Unit (RPU).

Features and Benefits

Connectivity

• 24 dual-speed ports for easy Fast Ethernet integration and for protection of your

investment in legacy LAN equipment.

• Auto-negotiation enables each RJ-45 port to automatically select the optimum

communication mode (half or full duplex) if this feature is supported by the

attached device; otherwise the port can be configured manually.

• Independent RJ-45 10/100BASE-TX ports with auto MDI/MDI-X.

• Unshielded (UTP) cable supported on all RJ-45 ports: Category 3 or better for 10

Mbps connections, Category 5 or better for 100 Mbps connections, and Category

5, 5e or 6 for 1000 Mbps connections.

• IEEE 802.3 Ethernet, 802.3u Fast Ethernet, and 802.3z and 802.3ab Gigabit

Ethernet compliance ensures compatibility with standards-based hubs, network

cards and switches from any vendor.

• Provides stacking capability via RJ-45 ports with 1 Gbps stacking bandwidth. Up

to 8 units can be stacked together.

Expandability

• Supports 1000BASE-SX, 1000BASE-LX and 1000BASE-LH SFP transceivers.

Performance

• Transparent bridging

• Aggregate duplex bandwidth of up to 8.8 Gbps

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