Accton Technology Fast EtherHub 3500 Series User manual

Fast EtherHub 3500 System
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Installation and User’s Guide
Fast EtherHub 3500 System
Intelligent
Fast Ethernet Stackable Hub
with 12 100BASE-TX Ports;
including SNMP Management Support

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.
Before operating this product, please review the statements on electomagnetic emission interference and safety
compliance in Appendix D.
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No. 1 Creation Road III,
Science-based Industrial Park
Hsinchu 300, Taiwan, R.O.C.
Phone: [phone]
FAX: [phone]
BBS: 886-3-5770-654
Internet: [email protected]
86$+HDGTXDUWHUV
1962 Zanker Road
San Jose, CA 95112
Phone: [phone]
FAX: [phone]
BBS: 408-452-8828
FAST FAX: [phone]
Accton, EtherHub, SmartWatch, SmartExtender and AccView and 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.
EH3512I-TX
EH3512M-TX
E1296-R01
150136-101

Package Contents i
Package Contents
Carefully unpack the contents of the package and verify them
against the checklist given below. This checklist applies to all
the Fast EtherHub 3500 Series models unless otherwise specified.
Package Checklist
æFast EtherHub-12i
Intelligent Fast Ethernet Stackable Hub with 12 100BASE-TX Ports
(Model No. EH3512I-TX)
or Fast EtherHub-12mi SNMP
Intelligent Fast Ethernet Stackable Hub with 12 100BASE-TX Ports;
including SNMP Managment Support
(Model No. EH3512M-TX)
æTwo mounting brackets
æFour rubber foot pads
æOne AC power cord
æOne 20 cm FlexBus 3500 stack cable
æInstallation manual
æOwner 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.

Quick Installation iii
Quick Installation
Accton’s Fast EtherHub 3500 models each contain 12 Fast
Ethernet (100BASE-TX) RJ-45 ports, one MDI daisy-chain port,
and one slot for an optional connection using 100BASE-TX
(10BASE-T), 100BASE-T4 or 100BASE-FX.
The smart design built into the front display panel and
configure options provide 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 hub as described below:
1. Unpack the Fast EtherHub 3500 unit.
2. Find a location close to the network devices you need to
connect, and within easy reach of an electrical outlet.
These hubs are suitable for
desktop or rack mounting
3. Mount the hub on a desktop or any other flat surface. If you
are installing multiple hubs, you can stack them on top of
each other (after attaching the foot pads), or install them in a
standard EIA 19-inch rack.
Attach PCs to the station ports
4. Connect any devices that use a standard network interface
to the RJ-45 (MDI-X) station ports (e.g., a workstation,
server or router). Use 100WCategory 5 unshielded twisted-
pair (UTP) or 100Wshielded twisted-pair (STP) cable. Also
be sure that the length of any twisted-pair connection does
not exceed 100 meters. (Refer to Chapter 2 for a more
detailed description of calculating the maximum cable length
permitted between two end nodes.)
Attach each hub in the stack
with FlexBus 3500 stack cable
5. If you are stacking multiple hubs, connect the FlexBus 3500
stack cable between the “Out” and “In” backplane ports on
adjacent hubs. Run a simple chain starting at the Out port on
the top hub in the stack, and ending at the In port on the
bottom hub in the stack. No more than 6 hubs can be
connected via the backplane bus.

Fast EtherHub 3500 System User’s Guide
iv Quick Installation
Attach each hub to one of th
e
backplane segment
s
6. Connect each hub to one of the 3 Fast Ethernet segments
embedded in the backplane bus using either on-board
configuration (Chapter 4) or optional network management
software (e.g., AccView/Open). You can leave a hub isolated
from the backplane if required for your network environment
(e.g., to restrict network access for the attached user group).
However, you should be careful to structure your network
connections so that nodes which communicate frequently are
located in the same segment. (Factory default is Segment 1.)
Use the SmartExtender Module t
o
interconnect different segments i
n
the stac
k
7. Bridge the different backplane segments in the Fast Ethernet
3500 stack by running a connection from the optional
100BASE-TX extender module on this hub to any station
port on another hub in the stack that has been assigned to a
different segment. Remember that devices connected to the
switching port exist in a separate segment (and unless also
connected to the FlexBus management channel) cannot be
controlled by a management agent in the stack. When
connecting a hub to the expansion port, the maximum cable
length is 100 meters.
Or interconnect the stack’
s
segments by attaching the daisy-
chain port to a switch, or the
station ports to a router
8. If you do not have any available SmartExtender Modules,
the different segments in a Fast EtherHub 3500 stack can
also be combined into an interconnected network by running
a cable from the hubs’ daisy-chain ports (i.e., using port
12MDI on hubs attached to the different segments) to a
network interconnection device such a switch; or by running
a cable from the hubs’ station ports (i.e., using ports on hubs
attached to different segments) to a router.
Attach to the extended networ
k
via the daisy-chain por
t
9. You can also attach the overall stack to a network intercon-
nection device via the daisy-chain port (when connecting to
a switch) or via a station port (when connecting to a router).
Run straight-through twisted-pair cable from the hub to the
other device. When attaching to a switch, run cable from the
MDI daisy-chain port on this hub to any (MDI-X) station
port on the switch (or vice versa).
Note: When using the 12MDI daisy-chain port, remember that port
12X cannot be used.

Fast EtherHub 3500 System User’s Guide
Quick Installation v
Or attach to the extended
network via the SmartExtender
Module
The SmartExtender Module can
be used to attach to another
network device that uses a
different media type
10.If an optional SmartExtender Module is installed in the
expansion port, it can be used to make a bridged connection
from this hub to another network device using 100BASE-TX
(10BASE-T), 100BASE-T4 or 100BASE-FX media types.
When connecting a node to the expansion port, the maxi-
mum cable length is 100 meters for twisted-pair cable, and 2
kilometers for fiber. (Refer to Chapter 2 for a more detailed
description of calculating the maximum length permitted for
fiber optic cable.)
Attach the SmartExtender Module
to a hub, switch, bridge or router
You can use the extender module to bridge this hub to
another Ethernet or Fast Ethernet hub or stack; or to attach it
to a network interconnection device, such as a switch, bridge
or router. However, when using the expansion port to cascade
to other networking devices outside the stack, note that the
maximum cascade length should be limited to 7 devices.
Transmission speed is automatically
set for any connection made to the
SmartExtender Module
For integrating legacy networks, the 100BASE-TX extender
module provides for connection via either 100BASE-TX or
10BASE-T. All 100BASE entender modules use auto-sensing
to set the transmission speed at 10 or 100 Mbps. In other words,
this module can correctly set the transmission speed for the
attached device, even if it does not support auto-negotiation.
Transmission mode automatically
configured for the connected device
only if it supports auto-negotiation
Use half duplex for a
shared collision domain
The extender modules, except for 100BASE-T4, support both
half-duplex and full-duplex communications. However, for
this hub to correctly set the transmission mode, the attached
device must also support auto-negotiation. If auto-negotiation
fails, the transmission mode defaults to half duplex. If this
setting is not suitable, then the transmission mode must be
manually configured via on-board configuration (Chapter 4)
or optional network management software (e.g., AccView/Open).
To reactivate auto-negotiation, just unplug a connection from
the port on the hub and plug it in again. Remember that full-
duplex mode can only be used for a dedicated link, such as that
provided by the SmartExtender Module. When connecting to a
shared collision domain (i.e., another hub) set the transmission
mode for half duplex.

Fast EtherHub 3500 System User’s Guide
vi Quick Installation
Difference in connecting to the
extended network via the daisy-
chain port or SmartExtenter Module
The Fast EtherHub 3500 stack can be connected to a larger
network using any device such as a switch, bridge or router.
Depending on your network configuration, you may attain
better performance by making a direct connection from the
daisy-chain port (or a station port) on this hub to an
interconnection device. Making a connection from an
extender module may introduce slightly more delay.
Check your connections
11. Verify network communications by ensuring that -
• you have made all the necessary connections
• you can access any connected resources
• the hub’s indicators are functioning properly
If you encounter any problems in installing the Fast EtherHub
3500 system, refer to Chapter 2 for a detailed description of
installation procedures, or to Appendix A for help in
troubleshooting.

About this Guide vii
About this Guide
This guide is designed for the experienced network installer.
It describes how to install and operate Accton’s Fast EtherHub
3500 system. 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 - Product Overview
Brief description of Fast Ethernet, followed by a description of
this hub and a summary of its important features and
specifications.
Chapter 2 - Installing the System
Installing a Fast EtherHub 3500 and making basic network
connections. Also includes a description of significant
components on the hub including ports and indicators.
Chapter 3 - Setting up Network Connections
Shows sample network configurations for a local area network.
Chapter 4 - Configuring the System
Describes how to manage the system via the on-board
configuration program.
Chapter 5 - Hardware Reference
Detailed description of indicator panel and ports.
Appendices - Troubleshooting, cable assignments, and product specifications.

Contents
Contents ix
Chapter 1: Product Overview 1-1
Introduction to Fast Ethernet 1-1
Brief Description of the Fast EtherHub 3500 System 1-1
Distinguishing Factors of Fast EtherHub 3500 System 1-5
Basic Features of Fast EtherHub 3500 System 1-6
Data Switching with the SmartExtender Modules 1-9
Switching Technology 1-9
Configuration Options for the SmartExtender Modules 1-9
Switching Methods 1-10
Chapter 2: Installing the System 2-1
Pre-Installation Requirements 2-1
Hardware Installation 2-2
Stacking Hubs without a Rack 2-2
Mounting Hubs in a Rack 2-3
Connecting the Hub System 2-4
Making a Connection via an MDI-X Station Port 2-4
Connecting to the Stack’s Backplane 2-5
Making a Connection via the MDI Daisy-Chain Port 2-6
Connecting to a SmartExtender Module 2-6
Installing a Backup Power Supply 2-11
Powering on the Hub 2-12
Diagnostic Tests 2-12
Hot Remove 2-13
Configuring a Manageable Stack 2-14
Installing an SNMP Backup Agent 2-14
Verifying Port Status 2-15
Verifying System Operation 2-15

Fast EtherHub 3500 System User’s Guide
x Contents
Chapter 3: Setting up Network Connections 3-1
Special Architecture Used for the Fast EtherHub 3500 Stack 3-1
Multi-Segment Architecture 3-1
FlexBus Management Link 3-2
Hub ID Setting 3-2
Using Management Agents 3-2
Port Backup Function 3-4
Security Features 3-4
Sample Network Configurations 3-5
Attaching the Stack to One Segment 3-5
Attaching the Stack to Multiple Segments 3-6
Isolating Specific Hub Connections 3-7
Isolating Each Hub 3-8
Extending the Network with Alternate Connections 3-9
Linking the Stack to a Management Station 3-10
Interconnecting the Segments 3-11
Connecting Remote Stacks 3-12
Operating in the Novell NetWare IPX Environment 3-13
Operating in the TCP/IP Environment 3-14
Connecting to the Network Backbone 3-15
Chapter 4: Configuring the System 4-1
Making the Connections Required for System Configuration 4-1
Direct Connection 4-2
Network Connection 4-2
Local In-Band Telnet Connection 4-3
Local In-Band Network Connection 4-3
Remote Connection 4-4
Configuring the Fast EtherHub Site 4-4
Configuring the Remote Site 4-4
Remote Configuration Methods 4-4
Accessing the Configuration Management Program 4-5
Configuring Your System with the On-board Program 4-5
Using the Fast EtherHub 3500 System Configuration Program 4-7
System Configuration Program for the Fast EtherHub-12i 4-8
Configuring the SmartExtender Port 4-9

Fast EtherHub 3500 System User’s Guide
Contents xi
System Configuration Program for the 12mi and Stack 4-11
Exiting the Configuration Program 4-12
Restarting the Agent 4-13
Displaying System Information 4-14
Configuring the SNMP Agent 4-15
Configuring SNMP Communities 4-16
Configuring IP Trap Managers 4-17
Configuring IPX Trap Managers 4-18
Changing the Segment Configuration 4-19
Configuring Hub Parameters 4-21
Configuring Port Parameters 4-25
Defining Backup Ports 4-29
Port Intrusion Control 4-30
Downloading System Software via a TFTP Server 4-32
Xmodem Download 4-34
Changing User Passwords 4-35
Console Lockout 4-36
Segment Statistics 4-37
Hub Statistics 4-38
Port Statistics 4-39
Chapter 5: Hardware Reference 5-1
Indicator Panel 5-2
Power Indicator 5-2
SmartExtender Module Indicator 5-2
Interhub 5-3
SNMP 5-4
Segment Indicators 5-4
Management Agent Indicators 5-5
Hub ID Indicator 5-5
Serial 5-6
Terminator 5-7
Isolation 5-7
Utilization Indicators 5-7
Collision Indicators 5-8
Port Status Indicators 5-10
Diagnostic Test Indicators 5-11

Fast EtherHub 3500 System User’s Guide
xii Contents
Network Connections 5-13
Station Ports 5-13
Daisy-Chain Port 5-13
Serial Port 5-14
Rear Panel Components 5-15
Power Supply Modules 5-15
FlexBus Ports 5-16
In 5-16
Out 5-16
Appendix A: Troubleshooting A-1
Diagnosing Hub Indicators A-1
System Diagnostics A-2
Power and Cooling Problems A-2
Installation A-2
Physical Configuration A-4
System Integrity A-4
Appendix B: Pin Assignments B-1
RJ-45 Port B-1
DB9 Serial Port Pin Description B-2
Hub’s 9-Pin Serial Port to PC’s 9-Pin COM Port B-3
Hub’s 9-Pin Serial Port to PC’s 25-Pin DTE Port B-4
Hub’s 9-Pin Serial Port to Modem’s 25-Pin DCE Port B-5
Appendix C: Product Specifications C-1
Product Specifications C-1
Appendix D: Regulatory Standards D-1
EMI Warning D-1
FCC Class A Certification D-1
Voluntary Control Council for Interference (VCCI-1) D-2
EN55022 Declaration of Conformance D-3
CE Mark Declaration of Conformance D-3
Safety Compliance D-4

Fast EtherHub 3500 System User’s Guide
Contents xiii
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-3
Technical Support E-3
Limited Warranty E-4
Customer Remedies E-4
Return Process E-5
Accton Offices E-6
Ordering Information E-7
Glossary
Index

Fast EtherHub 3500 System User’s Guide
xiv Contents
List of Figures
Figure 2-1 Stacking Hubs without a Rack 2-2
Figure 2-2 Mounting Hubs Using a Mounting Rack 2-3
Figure 3-1 Attaching All Hubs in Stack to One Segment 3-5
Figure 3-2 Attaching Hubs in Stack to Three Segments 3-6
Figure 3-3 Linking Part of the Stacked Hubs to a Segment 3-7
Figure 3-4 Stacked Hubs Not Linked to a Segment 3-8
Figure 3-5 Linking Stacked Hubs to Unmanaged Hubs 3-9
Figure 3-6 Linking Stacked Hubs to an NMS 3-10
Figure 3-7 Linking Segments in a Stacked System 3-11
Figure 3-8 Connecting Remote Stacks 3-12
Figure 3-9 System Applied in Novell NetWare IPX Environment 3-13
Figure 3-10 System Applied in TCP/IP Environment 3-14
Figure 3-11 Connecting to the Network Backbone 3-15
Figure 4-1 Main Configuration Menu (12i only) 4-8
Figure 4-2 Configuration Menu for Extender Module (12i only) 4-9
Figure 4-3 Main Configuration Menu 4-11
Figure 4-4 Screen Messages for System Resart 4-13
Figure 4-5 System Information Menu 4-14
Figure 4-6 SNMP Configuration Menu 4-15
Figure 4-7 SNMP Communities Menu 4-16
Figure 4-8 IP Trap Managers Menu 4-17
Figure 4-9 IPX Trap Managers Menu 4-18
Figure 4-10 Segment Configuration Menu 4-19
Figure 4-11 Hub Configuration: Hub Selection Menu 4-21
Figure 4-12 Hub Configuration Menu 4-22
Figure 4-13 Hub ID Configuration Menu 4-24
Figure 4-14 Port Configuration: Port Selection Menu 4-25
Figure 4-15 Port Configuration Menu 4-26
Figure 4-16 SEM Port Configuration Menu 4-27
Figure 4-17 Port Backups Menu 4-29
Figure 4-18 Port Intrusion Control: Hub Selection Menu 4-30
Figure 4-19 Port Intrusion Control Menu 4-31
Figure 4-20 TFTP Download Menu 4-32
Figure 4-21 Xmodem Download Menu 4-34
Figure 4-22 User Passwords Menu 4-35
Figure 4-23 Console Lockout Menu 4-36
Figure 4-24 Segment Statistics Window 4-37

Fast EtherHub 3500 System User’s Guide
Contents xv
Figure 4-25 Hub Statistics: Hub Selection Menu 4-38
Figure 4-26 Hub Statistics Window 4-38
Figure 4-27 Port Statistics: Port Selection Menu 4-39
Figure 4-28 Port Statistics Menu 4-40
Figure 4-29 SEM Port Statistics Menu 4-42
Figure 5-1 Front Panel of EtherHub-12mi 5-1
Figure 5-2 Indicators for EtherHub-12mi 5-2
Figure 5-3 Rear Panel 5-15
Figure B-1 RJ-45 Connector (on the Hub Side) B-1
Figure B-2 DB9 Serial Port (on the Hub Side) B-2
List of Tables
Table 2.1 Calculating the Power Budget for Fiber Optics 2-8
Table 2.2 Power Budget for Common Guage Fiber Optics 2-9
Table 2.3 Diagnostic Test Functions 2-13
Table 2.4 Checking Key LED Indicators 2-15
Table 2.5 Maximum Cable Length 2-16
Table 4.1 Configuration Options in Main Menu (12i only) 4-9
Table 4.2 ConfigurationOptions for Extender Module (12i only) 4-10
Table 4.3 Main Configuration Menu 4-12
Table 4.4 System Information Menu 4-14
Table 4.5 SNMP Configuration Menu 4-15
Table 4.6 SNMP Communities Menu 4-16
Table 4.7 IP Trap Managers Menu 4-17
Table 4.8 IPX Trap Managers Menu 4-18
Table 4.9 Segment Configuration Menu 4-20
Table 4.10 Hub Configuration Menu 4-23
Table 4.11 Port Configuration Menu 4-26
Table 4.12 SEM Port Configuration Menu 4-28
Table 4.13 Port Backups Menu 4-30
Table 4.14 Port Intrusion Control Menu 4-31
Table 4.15 TFTP Download Menu 4-33
Table 4.16 Xmodem Download Menu 4-34
Table 4.17 User Passwords Menu 4-35
Table 4.18 Console Lockout Menu 4-36
Table 4.19 Segment Statistics Menu 4-37
Table 4.20 Hub Statistics Menu 4-39
Table 4.21 Port Statistics Menu 4-41

Fast EtherHub 3500 System User’s Guide
xvi Contents
Table 4.22 SEM Port Statistics Menu 4-42
Table 5.1 Power Indicator 5-2
Table 5.2 SmartExtender Module Indicator 5-2
Table 5.3 SmartExtender Module Indicators 5-3
Table 5.4 Interhub Indicator 5-3
Table 5.5 SNMP Indicator 5-4
Table 5.6 Management Agent Indicators 5-5
Table 5.7 Hub Indicators 5-6
Table 5.8 Serial Indicator 5-6
Table 5.10 Terminator Indicator 5-7
Table 5.11 Isolation Indicator 5-7
Table 5.12 Utilization Indicators 5-7
Table 5.13 Collision Indicators 5-8
Table 5.14 Partition/Disable Indicators 5-9
Table 5.15 Link/Traffic Indicators 5-10
Table 5.16 Diagnostic Indicators 5-11
Table 5.17 Diagnostic Results 5-12
Table B.1 RJ-45 Pin Assignments B-1
Table B.2 DB9 Port Pin Assignments B-2
Table B.3 Full-Pin Connection from
Hub’s 9-Pin Serial Port to PC’s 9-Pin COM Port B-3
Table B.4 Three-Pin Connection from
Hub’s 9-Pin Serial Port to PC’s 9-Pin COM Port B-3
Table B.5 Full-Pin Connection from
Hub’s 9-Pin Serial Port to PC’s 25-Pin DTE Port B-4
Table B.6 Three-Pin Connection from
Hub’s 9-Pin Serial Port to PC’s 25-Pin DTE Port B-4
Table B.7 Hub’s 9-Pin Serial Port to
Modem’s 25-Pin DCE Port Pin Assignments B-5
Table E.1 Parameters for SmartExtender Modules E-7
T

Product Overview 1-1
Chapter 1: Product Overview
Introduction to Fast Ethernet
Standard 10 Mbps Ethernet has served well for past generations
of 80286 and 80386 machines performing simple file transfers.
However, with the inevitable growth in corporate network size
and the introduction of fully-functional 32-bit PC architectures,
and operating systems running complex applications, 10 Mbps
Ethernet has become a serious bottleneck.
With the recent flood of choices for upgrading media
bandwidth, 100 Mbps Fast Ethernet has become the most
popular choice because of its low cost, compatibility with
existing Ethernet applications, and the fact that it can run on top
of an installed base of twisted-pair cabling.
Moreover, by using a dual-speed switch (10 or 100 Mbps),
Fast Ethernet can be easily integrated into an existing 10 Mbps
Ethernet environment with no need for protocol translation or
changes to network software. It also includes specifications for
a media-independent interface (MII), which permits a switched
connection to any of the 100BASE-T sublayers; i.e., 100BASE-
TX (10BASE-T), 100BASE-FX or 100BASE-T4.
Brief Description of the Fast EtherHub 3500 System
The EtherHub 3500 System is a powerful and innovative LAN
network enhancement and management product series. Each
component in the system supports a Fast Ethernet multi-segment
bus architecture that enhances traffic management and network
bandwidth utilization. This system offers the network manager
a wide range of flexible configuration options, allowing you to
increase your network’s bandwidth tenfold or more. In addition,
the entire installation can be monitored and controlled via SNMP
protocol through any network management station.

Fast EtherHub 3500 System User’s Guide
1-2 Product Overview
Moreover, the Fast EtherHub 3500 System provides advanced
network security features including “Intrusion Protection”
which ensures that only designated workstations are able to
transmit packets onto the network. Management access via the
out-of-band serial port or in-band via telnet is also password
protected.
The basic components of this network system include:
Full Connectivity
• Provides 12 RJ-45 (MDI-X) 100BASE-TX Fast Ethernet
(shielded) station ports for connecting devices to the network
using straight-through shielded or unshielded twisted-pair
cable (100WCat 5 UTP or 100WSTP)
• 1 RJ-45 (MDI) daisy-chain port for connection to a switching
hub, eliminating the need for crossover cables
• 1 slot for optional SmartExtender Modules which provide a
connection to 100BASE-TX (10BASE-T), 100BASE-T4 or
100BASE-FX via a switching port
• A multi-segment bus architecture that enhances traffic
management and network bandwidth utilization
• 2 FlexBus ports for connecting to other hubs in a Fast
EtherHub 3500 stack via FlexBus 3500 stack cable
• On-board management via the RS232 serial port connected
directly to a terminal, or to a local or remote computer (that
provides a standard RS232 port)
The specific components are the:
Fast EtherHub-12i
Intelligent Fast Ethernet Stackable Hub with 12 100BASE-TX Ports
The Fast EtherHub-12i conforms to the IEEE 802.3u repeater
specification. It also serves as an intelligent hub which collects
port statistics and records events for system administration. Basic
configuration is provided by the on-board configuration program.

Fast EtherHub 3500 System User’s Guide
Product Overview 1-3
This hub can be used in a stand-alone configuration to form a
simple Fast Ethernet LAN networking 2 to 12 computers using
the RJ-45 station ports. Further network expansion can be
achieved using the embedded tri-segment backplane, the MDI
daisy-chain port, or one of the optional SmartExtender Modules.
Moreover, when stacked with other intelligent hubs through the
FlexBus ports and connected to the Fast EtherHub-12mi SNMP
management device, it can be monitored and controlled through
in-band or out-of-band channels.
Fast EtherHub-12mi SNMP
Intelligent Fast Ethernet Stackable Hub with 12 100BASE-TX Ports;
including SNMP Managment Support
This model conforms to both the IEEE 802.3u repeater
specification and the Simple Network Management Protocol
(SNMP). It not only functions as a 12-port Fast Ethernet
repeater, but also provides an on-board SNMP-based network
management agent for monitoring and controlling various
network components. It can monitor up to 6 intelligent hubs
connected to the same stack (including itself) through the
FlexBus port connection. This Fast EtherHub provides SNMP
management for the connected stack via various Management
Information Bases (MIBs), including MIB II, repeater MIB, and
Accton’s private MIB.
SmartExtender Module -
• 100BASE-TX (EM3551-TX)
Provides two RJ-45 ports, both of which can be connected to
10BASE-T or 100BASE-TX media types. Transmission
speed is automatically set to 10 or 100 Mbps via auto-
sensing, and half or full duplex via auto-negotiation.
• 100BASE-T4 (EM3551-T4)
Provides two RJ-45 ports for 100BASE-T4 connection.
Transmission speed is automatically set to 10 or 100 Mbps