Accton Technology ES3002-TF User Manual

SwitcHub-2se

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Installation Manual

SwitcHub-2se

Smart

with one 10BASE-T/100BASE-TX Port

Fast Ethernet Switch

and one 100BASE-FX Port

Copyright (c) 1996 by Accton Technology Corporation. All rights reserved.

No part of this document may be copied or reproduced in any form or by any means without the
prior written consent of Accton Technology Corporation.

Accton makes no warranties with respect to this documentation and disclaims any implied
warranties of merchantability, quality, or fitness for any particular purpose. The information in this
document is subject to change without notice. Accton reserves the right to make revisions to this
publication without obligation to notify any person or entity of any such changes.

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No. 1 Creation Road III,
Science-based Industrial Park
Hsinchu 300, Taiwan, R.O.C.
Phone: [phone]
FAX: [phone]
BBS: 886-35-770-654
Internet: [e-mail]

Accton, SmartWatch and SwitcHub are trademarks or registered trademarks of Accton Technology
Corporation. Other trademarks or brand names mentioned herein are trademarks or registered
trademarks of their respective companies.

ES3002-TF
E0596-R01
150050-101

86$+HDGTXDUWHUV

1962 Zanker Road
San Jose, CA 95112
Phone: [phone]
FAX: [phone]
BBS: 408-452-8828
FAST FAX: [phone]

Package Contents

Carefully unpack the contents of the package and verify them against the checklist
given below.

Package Checklist

æ Fast SwitcHub-2se

(Model No. ES3002-TF)

æ AC power cord
æ Four rubber foot pads
æ Installation manual
æ Owner registration card

Please inform your dealer immediately should there be any wrong, missing or
damaged parts.

If possible, retain the carton, including the original packing materials. Use
them again to repack the unit in case there is a need to return it for repair.

To qualify for product updates and product warranty registration, fill in the

Owner Registration Card and return it to Accton Technology Corporation.

Package Contents i

Quick Installation

The Fast S witcHub-2se co n ta i n s 2 Ethernet p o r ts that can operate at full-duplex or
half-duplex. One of these ports supports 100BASE- TX or 10BASE-T (twisted­pair) connection, while the other port supports 100BASE-FX (fiber optic)
connection. The smart design built into the front display panel and configure
options, provides a friendly interface that simplifies installation and network
troubleshooting. If you are already familiar with basic network operations, you
should be able to install this switch as described below:

1. Unpack the Fast SwitcHub-2se.

2. Find a location close to the network devices you need to connect, and within

easy reach of an electrical outlet.

3. For 100BASE-TX or 10BASE-T devices, connect a workstation or server to

the Port 1 MDI-X station port. Otherwise, you can connect to another switch
or other network interconnection device by running straight-through twisted­pair cable between the MDI daisy-chain port on one device (e.g., Port 1 on
this switch) to the MDI-X station port on the other device. Use 100
Category 5 STP or UTP cable to connect to the switch, and be sure the
length of any twisted-pair connection does not exceed 100 meters.

For integrating legacy networks, Port 1 provides for connection via either

100BASE-TX or 10BASE-T. It uses auto-negotiation to dynamically set the
required transmission speed at 10 or 100 Mbps.

W

4. For 100BASE-FX devices, connect to Port 2 (i.e., connecting the Rx/Tx

jacks on the target device to the Tx/Rx jacks on the switch). When
connecting a node to Port 2, the maximum cable length is 2 kilometers if you
are have a dedicated link (i.e., full-duplex mode); otherwise, the maximum
length is 412 meters for a shared collision domain (i.e., a half-duplex
connection). Refer to Chapter 2 for a more detailed description of
calculating the maximum length permitted for fiber optic cable.

Quick Installation iii

Fast SwitcHub-2se User’s Guide

5. Set the transmission mode for each port to full or half-duplex. Full-duplex

communications can only be supported for a dedicated link (i.e., set the
communications to half duplex if you are connecting to a shared collision
domain). Transmission must be set to full duplex or half duplex depending
on the mode supported by the conne ct e d d e vice. You must manually set the
required mode with the configure button (Chapter 2).

6. Verify network communications by ensuring that -

• you have made all the necessary connections

• you can access any connected resources

• the switch’s indicator LEDs are functioning properly

Note: For devices connected directly to either port on the switch, it will

automatically detect transmission speed (10/100 Mbps). However, unless
the connected devices are operating at half-duplex (i.e., system default), you
will have to manually set the transmission mode via the configure button.
(Refer to Full/Half Duplex Mode Selection in Chapter 2).

If you encounter any problem s in installing the Fast SwitcHub-2se, refer to Chapter
2 for a detailed description of installation procedures, or to Appendix A for help
in troubleshooting.

iv Quick Installation

About this Guide

This guide is designed for the experienced network installer. It describes how
to install and operate Accton’s Fast SwitcHub-2se Ethernet switch. After
reading this manual, you should be able to use the front display panel and
configure options to manage all your network connections.

This manual covers the following topics:
Chapter 1 -

Brief description of switching technology, followed by a description of this switch
and a summary of its important features and specifications.

Chapter 2 ­Installing a Fast SwitcHub-2se and making basic network connections. Shows
sample network configurations for a local area network.

Chapter 3 ­Detailed description of indicator panel and ports.

Appendices - Troubleshooting, cable assignments, and product specifications.

Product Overview

Setup and Configuration

Hardware Reference

About this Guide v

Contents

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

Switching Technology...............................................................................................1-1

Accton’s Smart Extender...........................................................................................1-2

Switching Methods....................................................................................................1-3

Features of the Fast SwitcHub-2se............................................................................1-4

Chapter 2: Setup and Configuration......................................2-1

Pre-Installation Requirements ...................................................................................2-1

Connecting the Switch System..................................................................................2-1

Making RJ-45 Connections..................................................................................2-2

Making Fiber Optic Connections..........................................................................2-3

Providing Power to the SwitcHub.............................................................................2-4

Diagnostic Tests........................................................................................................2-5

Upon Power On ..............................................................................................2-5

During Normal Operation...............................................................................2-5

Setting the Display Mode..........................................................................................2-5

Selections Available.............................................................................................2-6

Bandwidth Utilization.....................................................................................2-6

Packet Forwarding Ratio.................................................................................2-6

Packet Filtering Ratio .....................................................................................2-7

Collision Ratio................................................................................................2-7

Full/Half Duplex Mode Selection...................................................................2-7

Diagnostic Function........................................................................................2-8

Verifying Port Status.................................................................................................2-8

Verifying System Operation......................................................................................2-9

vii

Fast SwitcHub-2se User’s Guide

Chapter 3: Hardware Reference.............................................3-1

Front Panel ...............................................................................................................3-1

Configure Button..................................................................................................3-2

SmartWatch Indicator Panel.................................................................................3-3

Power..............................................................................................................3-3

Statistical Display for System Performance....................................................3-4

Setting the Communication Mode ..................................................................3-6

Diagnostics Display Mode..............................................................................3-7

Port Status Display..........................................................................................3-8

Rear Panel ...............................................................................................................3-10

Ethernet Ports.......................................................................................................3-10

Power Socket........................................................................................................3-11

Appendix A: Troubleshooting................................................A-1

Diagnosing Hub Indicators........................................................................................A-1

System Diagnostics ...................................................................................................A-2

Installation............................................................................................................A-2

Configuration........................................................................................................A-2

Switch Integrity....................................................................................................A-3

Ap p e ndix B: P o rt and C a ble A s s i gnment s............................. B-1

RJ-45 Port ...............................................................................................................B-1

Appendix C: Specifications....................................................C-1

Product Specifications...............................................................................................C-1

viii Contents

Fast SwitcHub-2se User’s Guide

Appendix D: Regulatory Standards Compliance.................. D-1

EMI Warning ............................................................................................................D-1

FCC Class B Certification....................................................................................D-1

Voluntary Control Council for Interference (VCCI-2).........................................D-2

EN55022 Declaration of Conformance ................................................................D-3

Safety Compliance.....................................................................................................D-4

Underwriters Laboratories Compliance Statement...............................................D-4

Sicherheitshinweise..............................................................................................D-5

Appendix E: Product Support Services ................................ E-1

Product Registration..................................................................................................E-1

Problem Report .........................................................................................................E-1

Hardware Repair Service...........................................................................................E-1

Software Update and Upgrade Service......................................................................E-2

Bulletin Board Service (BBS) ...................................................................................E-2

Interactive Fast Fax (U.S.A. office) ..........................................................................E-2

Technical Support .....................................................................................................E-3

Limited Warranty......................................................................................................E-4

Customer Remedies..............................................................................................E-4

Return Process......................................................................................................E-5

Accton Offices...........................................................................................................E-6

Ordering Information ................................................................................................E-6

Glossary
Index

Contents ix

Chapter 1: Introduction

Switching Technology

The Ethernet Switch allows simultaneous transmission of multiple packets via
an internal high-speed data channel. This means that it can partition a network
more efficiently than bridges or routers. The Ethernet Switch is therefore fast
being recognized as one of the most important building blocks for today’s
networking technology.

The learning function in the switch stores the address and corresponding port
number of each incoming and outgoing packet in a routing table. This
information is subsequently used to filter packets whose destination address is
on the same segment as the source address. This confines network traffic to its
respective domain, reducing the overall load on the network.

The switch scans the destination address from the packet header, searches the
routing table provided for the incoming port and forwards the packet only if
required, often before fully received. This fast forwarding makes the switch
attractive for connecting servers directly to the network, thereby increasing
throughput and availability. However, the switch is most commonly used to
segment existing hubs, which nearly always improves overall performance. A
switch can be easily configured in any Ethernet network to significantly boost
bandwidth using conventional cabling and adapters.

Introduction 1-1

Fast SwitcHub-2se User’s Guide

Accton’s Smart Extender

Accton’s Fast Switch-2se can boost network bandwidth fourfold (i.e., if running
at 100Mbps and using full-duplex operation for both ports). It provides one
10/100 Mbps RJ-45 port for 10BASE-T or 100BASE-TX media attachment
(which is automatically detected by the switch), and one 100 Mbps fiber optic
port for 100BASE-FX media attachment via an SC or ST type connector.
Either of these ports can be connected to a subnetwork, or directly to a server or
key workstation, as well as set for full or half-duplex operation. Moreover, the

fiber optic port can be used to significantly extend your network’s diameter.

Note: The ES3002-TF-SC provides an SC-type fiber connector.

The ES3002-TF-ST provides an ST-type fiber connector.

In addition to partitioning an overloaded network, this switch provides
connection between networks based on twisted-pair and fiber optic cabling, and
can also be configured to operate in either full-duplex or half-duplex data
transfer mode to support the interconnection requirements of high-speed
devices.

This switch performs “on-the-fly” cut-through switching, which passes a packet
to the other port according to the destination address scanned from the packet
header. This technique reduces the latency of packet transmission to 20
microseconds or less. Compared to approximately 800 microseconds for a
bridge or 1800 microseconds for a router, both of which have to store the entire
packet before it can be forwarded, Accton’s SwitcHubs deliver a quantum
improvement in your network's performance.

As a device functioning on the media access control (MAC) layer, the Fast
SwitcHub is protocol independent. Full compliance with IEEE802.3 and
IEEE802.3u standards makes it transparent to upper-level protocols such as
TCP/IP, NetWare, DECnet and XNS. Accton's Smart Extender can link high­speed 100BASE-TX or conventional 10BASE-T networks to the newer

1-2 Introduction

Fast SwitcHub-2se User’s Guide

generation of 100BASE-FX devices; or can be used to significantly extend a
100BASE-TX or 10BASE-T network with an intermediate fiber optic link (i.e.,
by chaining two or more switches). Moreover, by breaking your network into
smaller and more manageable segments, each linked to the larger network with
a switch, the maximum distance for communications between end-nodes is
unlimited.

Switching Methods

Traditional bridges and routers use a switching method called store-and­forward in which the entire frame must be received before the bridge can

perform a table look-up for the destination node and forward the packet to the
corresponding port. As a result, each packet is delayed by approximately 800
microseconds. It may be necessary to use store-and-forward when a lot of data
errors are occurring over the network, or when connecting to very slow devices.

Compared to this “safe” mode of operation, cut-through reduces the packet
transmission delay to around 20 microseconds by picking the destination
address out of the header as soon as its received, and directing the frame to the
appropriate port long before the full packet has been received. The remaining
technique, employed to improve data reliability, is called fragment-free cut-
through. It uses a more conservative approach to cut-through that waits until
the collision window has elapsed (i.e., the first full 64 bytes has been received)
before processing the packet. This prevents runts from being passed along,
effectively cleaning up the data stream.

Although cut-though switching is recommended as the fastest method for most
applications, the other methods mentioned above are also supported by the Fast
SwitcHub-2se to guarantee flawless performance. To ensure that you can
manage any kind of network load, the Smart Extender uses adaptive cut-
through switching based on Accton’s smart algorithm. This method
dynamically changes the way it handles data passing through the switch based

Introduction 1-3

Fast SwitcHub-2se User’s Guide

on the current error rate. These switching alternatives start at standard cut­through for a clean data environment, change to fragment-free cut-through for a
moderate error rate, and then progress to store-and-forward for a highly
contentious environment. By using this method, the Fast SwitcHub-2se
delivers the best networking performance under any environment.

Features of the Fast SwitcHub-2se

• Conforms to the IEEE 802.3 and IEEE 802.3u specifications, as well as

10BASE-T, 100BASE-TX and 100BASE-FX standards

• Provides one independent RJ-45 10BASE-T / 100BASE-TX Ethernet station

port, where each logical port consists of 1 MDI port (for connection to hubs

or switches) and 1 MDI-X port (for connection to workstations or servers),

eliminating the need for crossover cables

• Provides one independent 100BASE-FX port with Rx/Tx jacks

(SC or ST type connectors can be used, depending on the model you purchase)

• Both ports support full-duplex and half-duplex operation

• Total bandwidth of up to 200 Mbps (when full-duplex mode is used)

• RJ-45 port auto-senses transmission speed (10/100 Mbps)

• Uses adaptive cut-through switching (which dynamically changes among

standard cut-through, fragment free cut-through, and store-and-forward

depending on the error rate)

• Uses back pressure to eliminate frame loss by “blocking” traffic from end

stations or segments connected directly to the switch when its buffers fill

• Minimum latency of packet transmission (leading edge to leading edge) less

than 20 microseconds when using cut-through switching

• Uses “on the fly” cut-through technique to transport packets

1-4 Introduction

Fast SwitcHub-2se User’s Guide

• Transparent bridging function supported

• Address learning function to build the routing information database

• Operates at maximum packet filtering and forwarding rate

• Supports multimode fiber optic backbone of up to 2 kilometers for a

dedicated link (i.e., a full-duplex connection) or 412 meters for a shared

collision domain (i.e., a half-duplex connection)

• Provides frame filtering and forwarding functions for each port, which are

capable of filtering and forwarding 100% of all Ethernet packets at line speed

• Provides a 160 Kbyte buffer per port

• Routing table contains 4K entries per port to store node MAC addresses

• Uses fast hashing scheme to retrieve information from routing table when

making routing decisions

• An indicator panel for configuring the system or monitoring the overall

condition of the switch, including utilization, forwarding and collision rates

Introduction 1-5

Chapter 2: Setup and Configuration

This chapter provides information on pre-installation requirements, establishing
network connections, and configuring the system.

Pre-Installation Requirements

Before you start making network connections to the SwitcHub, make sure you
can provide the right operating environment, including power requirements,
and proximity to other network devices that are to be connected. Verify the
following installation requirements:

• Power requirements: 100 to 240 VAC at 50 to 60 Hz. The switch’s power

supply automatically detects the input voltage level.

• The SwitcHub should be located in a cool dry place, with at least 10 cm. of

space at the front and back for ventilation.

• Check if network cables and connectors needed for installation are available.

• Find a suitable location at the center of the devices you want to link, and

near a power outlet.

Connecting the Switch System

The SwitcHub has one RJ-45 Ethernet port, and one fiber optic port (with SC or ST
type connectors). Use twisted-pair cable to connect the RJ-45 MDI-X port to a
server/workstation, or to connect the RJ-45 MDI port to another compatible switch
or hub; and use 50/125
SC or ST type connectors (depending on the SwitcHub model y ou purchased) to
connect any compatible network dev ice to the Rx/Tx jacks. The SwitcHub can be
used to connect 100BASE-TX or 10BASE-T networks to a fiber optic backbone; or
can be used to significantly extend a 100BASE-TX or 10BASE-T network with an
intermediate fiber optic link (i.e., by chaining sev eral switches).

mm or 62.5/125 mm guage multimode fiber optic cable with

Setup and Configuration 2-1

Fast SwitcHub-2se User’s Guide

Making RJ-45 Connections

1. Prepare a straight-through twisted-pair cable with RJ-45 plugs at both ends.

2. If you are making a connection to a server or workstation (i.e., a dedicated

connection to an end-node device), be sure that it has a properly installed

100BASE-TX or 10BASE-T network interface card. Attach one end of the

cable to the

port of the device’s network interface card. As a general rule, the length of

twisted-pair cable forming a direct link between any two network devices

should not exceed 100 meters.

Note: Category 5 twisted-pair cable (100W) must be used for 100Mbps connections.
Although Category 3, 4 or 5 cable can be used for 10Mbps connections, we highly
recommend that you also use Category 5 cable for these connections to avoid any
unnecessary expense or confusion if you subsequently upgrade to Fast Ethernet.

If you are connecting to a network interconnection device, attach one end of
the cable to the

MDI-X station port on the other device (or vice versa). When cascading to

devices other than this switch, please refer to the accompanying
documentation for restrictions on stack size. Also note that because the
switch breaks up the path for connected devices into separate collision
domains, you should not include the switch or connected cabling in your
calculations for cascade length involving other devices.

Note: In contrast to repeater hubs, a cascade of sw it ches breaks up the collision
domain. The number of switches that can be cascaded is therefore theoretically
unlimited. However, in practice, the length of a cascade may be limited by the time­out requirements of the particular applications running over the network.

MDI-X station port on the switch and the other end to the RJ-45

MDI crossover port on the switch and the other end to an

3. Set the communication mode via the Configure button to full-duplex or

half-duplex mode to match the connected device. (Refer to

Communication Mode in Chapter 3.)

Do not plug a phone jack connector into the RJ-45 port. This may damage the

I

switch. Instead, use only twisted-pair cables with RJ-45 connectors that conform
to FCC standards.

2-2 Setup and Configuration

Setting the

Fast SwitcHub-2se User’s Guide

Making Fiber Optic Connections

1. Prepare a pair of fiber-optic cables with SC or ST type connectors at both ends.

SC-Type Connector ST-Type Connector

2. If you are making a connection to a server or workstation, be sure it that has

a properly installed 100BASE-FX network interface card. Connect the Rx/Tx

jacks on the target device to the Tx/Rx jacks on the switch.

Distance Limit and Power Loss in Fiber Optics - When using fiber optic cabling ,

the maximum leng th between two switches can be up to 2 k ilometers.

However, you mu st consider power loss w hen calculating the actual leng th of

cable that can be used with your system. You can calculate pow er loss with the

following formula:

(p dB - i dB)

m =

c dB/km

Variable Description

m cable length (kilometers)
p dB power budget
i dB intervening devices

(e.g., patch cables and splices)

c dB/km loss per kilometer of cable

Note: To determine the power loss incurred by intervening dev ices and specific cable

type, inquire with the manufacturer. The power budget depends on the gauge of cable

as shown below.

Gauge of Fiber Cable Power Budget

50/125 mm

62.5/125 mm

9.2 dB
13 dB

Setup and Configuration 2-3