Accton Technology Switch 3012B User Manual

CheetaHub Power-3012B  
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Copyright © 1997 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.  
International Headquarters  
No. 1 Creation Road III,  
USA Headquarters  
1962 Zanker Road  
Science-based Industrial Park  
Hsinchu 300, Taiwan, R.O.C.  
Phone: 886-3-5770-270  
FAX: 886-3-5770-267  
BBS: 886-3-5770-654  
San Jose, CA 95112  
Phone: 408-452-8900  
FAX: 408-452-8988  
BBS: 408-452-8828  
FAST FAX: 408-452-8811  
Internet: [email protected]  
Accton and CheetaHub 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.  
EH3012B  
150611-101  
E0997-R03  
 
Package Contents  
Carefully unpack the contents of the package and verify them  
against the checklist given below.  
Package Checklist  
æ CheetaHub Power-3012B (Model No. EH3012B)  
Ethernet hub with 12 dual-speed RJ-45 ports and 1 MII port  
æ two brackets for rack mounting  
æ four rubber foot pads  
æ installation manual  
æ warranty registration card  
æ AC power cord  
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 CheetaHub Power-3012B contains 12 RJ-45 ports for 10  
Mbps or 100 Mbps Ethernet connection (detected by auto-  
sensing). This dual-speed hub contains two internal repeater  
buses – one for 10 Mbps traffic and another for 100 Mbps  
traffic. Traffic passing between attached devices that operate at  
the same speed is isolated within the appropriate repeater bus.  
An internal Ethernet switch, consisting of a 10 Mbps and a 100  
Mbps switching port, is used to link the repeater buses. Only  
if traffic has to be passed between a 10 Mbps and a 100 Mbps  
device, if the destination address is not found in the address  
table, or broadcast traffic is sent, will data be forwarded to the  
other internal repeater bus.  
This hub provides an ideal bridge between 10 Mbps and 100  
Mbps Ethernet networks, all for a price that’s comparable to a  
standard Ethernet or Fast Ethernet hub. Moreover, the smart  
design built into the display panel 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 hub as described below:  
1. Unpack the dual-speed CheetaHub.  
2. Find a location close to the network devices you need to  
connect, and within easy reach of an electrical outlet.  
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 size EIA 19-inch rack (using the mounting brackets  
supplied with the hub).  
These hubs are suitable for  
desktop or rack mounting  
Quick Installation  
iii  
 
CheetaHub Power-3012B User’s Guide  
4. Connect PCs or other network devices to the RJ-45 ports.  
Attach PCs or daisy-chain to  
another device via the RJ-45 ports  
Connect any devices that use standard network interface  
cards to the RJ-45 (MDI-X) station ports (e.g., a workstation,  
server, bridge or router). This hub uses auto-sensing to  
dynamically set the required transmission speed at 10 Mbps  
or 100 Mbps for the RJ-45 ports. To cascade to another hub  
or switch, run straight-through twisted-pair cable from the  
MDI port (10/100 Mbps) on this hub to any (MDI-X) station  
port on the other device (or vice versa). If necessary, you  
can also cascade to another hub or switch by running  
crossover cable between MDI-X ports on the two devices.  
Use the correct  
twisted-pair cable  
Use unshielded twisted-pair (UTP) or shielded twisted-pair  
(STP) cable for RJ-45 connections: 100W Category 3, 4 or 5  
cable for 10 Mbps connections or 100W Category 5 cable for  
100 Mbps connections. Also be sure that the length of any  
twisted-pair connection does not exceed 100 meters (328 feet).  
Cascade limitations  
When using the MDI port for 10 Mbps connections, note that  
up to 4 hubs can be cascaded. However, when using the MDI  
port for 100 Mbps connections or when using two MDI-X  
ports connected with crossover cable for 100 Mbps  
connections, only 2 hubs can be cascaded.  
Limit total network span  
When connecting devices to the dual-speed hub, note that the  
total network span must be limited to:  
Single Hub  
200 meters of twisted-pair cable  
Two-hub Chain 205 meters of twisted-pair cable (for Fast Ethernet links)  
For example, if two PCs are connected to a hub, each using  
100 meters (328 feet) of twisted-pair cable, then the total  
network span of 200 meters (656 feet) is within the allowed  
limits. However, if you cascade two Fast Ethernet hubs, and  
connect a PC to each hub, each using 100 meters of cable, as  
in the preceding example, then you can only use 5 meters (16  
feet) of twisted-pair cable to link the two hubs together. The  
only way to extend the cabling that connects the hubs is to  
reduce the length of cable used to connect the PCs to the hubs.  
iv  
Quick Installation  
 
CheetaHub Power-3012B User’s Guide  
5. Connect other media types using the D-type MII port.  
Attach to alternate media  
types via the Class I MII port  
You can also connect to other network devices using the  
media independent interface (MII) on the back panel. You  
can attach to 100BASE-TX (operating at 100 Mbps only),  
100BASE-T4 or 100BASE-FX media types by plugging the  
appropriate transceiver into the MII connector. This port can  
be used to connect the hub to a collapsed backbone, or for  
media conversion to a compatible network device. However,  
note that the MII Port is Class I, and therefore cannot be  
cascaded to another hub.  
Limits on total network  
span also apply to MII port  
When connecting a switch or router to the MII port with  
twisted-pair cable, the maximum network span is 200 meters  
or 656 feet (i.e., 100 meters for the downlink from the switch  
or router to the hub, and 100 meters from hub to workstation).  
However, by attaching fiber-optic cable to the MII port on  
the rear panel, the maximum network span can be extended  
to 260 meters or 853 feet (i.e., 160 meters for the fiber optic  
downlink from the hub to the switch or router, and 100  
meters from hub to workstation).  
6. These hubs can serve as a collapsed backbone for small  
networks, or can be connected to a network interconnection  
device via one of the RJ-45 ports or the MII port. (Refer to  
Chapter 3 for sample applications.)  
7. 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 installing this dual-speed  
CheetaHub, refer to Chapter 2 for a detailed description of  
installation procedures, Chapter 3 for sample configurations, or  
Appendix A for help in troubleshooting.  
Quick Installation  
v
 
About this Guide  
This guide is designed for the experienced network installer.  
It describes how to install and operate Accton’s dual-speed  
CheetaHub. 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 technology, followed by a  
description of this hub and a summary of its important features  
and specifications.  
Chapter 2  
Chapter 3  
- Installing the System  
Installing a dual-speed CheetaHub and making basic network  
connections.  
- Setting up Network Connections  
Shows sample network configurations for a local area network.  
Appendices - Troubleshooting, cable assignments, and product specifications.  
About this Guide  
vii  
 
Contents  
Chapter 1: Product Overview  
1-1  
Introduction to Fast Ethernet  
Accton’s Dual-Speed CheetaHub System  
Basic Features  
1-1  
1-1  
1-2  
Chapter 2: Installing the System  
2-1  
Pre-Installation Requirements  
Hardware Installation  
2-1  
2-2  
2-2  
2-3  
2-4  
2-4  
2-5  
2-6  
2-7  
2-8  
2-8  
2-8  
2-8  
2-9  
2-9  
2-10  
Stacking Hubs on a Flat Surface  
Mounting Hubs in a Rack  
Connecting the Hub System  
Making a Connection via an MDI-X Station Port  
Making a Connection via the Daisy-Chain Port  
Restrictions on Cascade Length  
Making a Connection via the MII Port  
Providing Power to the Hub  
Connecting to the Power Supply  
Diagnostic Tests  
Hot Remove  
Fuse  
Verifying Port Status  
Verifying System Operation  
Chapter 3: Configuring the Network  
3-1  
Stand-Alone Network  
Cascading Hubs with the Daisy-Chain Port  
Making an Uplink with Fiber Optic Cable  
3-1  
3-2  
3-4  
Appendix A: Troubleshooting  
A-1  
Diagnosing Hub Indicators  
System Diagnostics  
Installation  
A-1  
A-2  
A-2  
A-2  
A-3  
Configuration  
System Integrity  
Contents  
ix  
 
CheetaHub Power-3012B User’s Guide  
Appendix B: Port and Cable Assignments  
B-1  
RJ-45 Port  
MII Port  
B-1  
B-2  
Appendix C: Product Specifications  
C-1  
Repeater Criteria  
Network Criteria  
Internal Switching Criteria  
C-1  
C-1  
C-2  
Appendix D: Standards Compliance  
D-1  
EMI Warning  
D-1  
D-1  
D-2  
D-2  
D-3  
D-3  
D-4  
FCC Class B  
Voluntary Control Council for Interference (VCCI-B)  
EN55022 Declaration of Conformance  
Safety Compliance  
Underwriters Laboratories Compliance Statement  
Sicherheitshinweise  
Appendix E: Product Support Services  
E-1  
Product Registration  
Problem Report  
Hardware Repair Service  
Bulletin Board Service (BBS)  
Interactive Fast Fax (U.S.A. Office)  
Technical Support  
E-1  
E-1  
E-1  
E-2  
E-2  
E-3  
E-4  
E-4  
E-5  
E-6  
E-6  
Limited Warranty  
Customer Remedies  
Return Process  
Accton Offices  
Ordering Information  
Glossary  
Index  
x
Contents  
 
CheetaHub Power-3012B User’s Guide  
List of Figures  
Figure 2-1 Stacking Hubs on a Flat Surface  
Figure 2-2 Mounting Hubs in a Rack  
Figure 2-3 Hub Indicators  
2-2  
2-3  
2-9  
3-2  
Figure 3.1 Stand-Alone Configuration  
Figure 3.2 Multiple Hub Configuration Using Daisy-Chain Port 3-3  
Figure 3.3 Uplinked Hub Using Fiber Optic Cable  
Figure B-1 RJ-45 Connector (on the Hub Side)  
Figure B-2 MII Connector  
3-4  
B-1  
B-2  
List of Tables  
Table 2-1 Hub Indicators  
Table 3-1 Maximum Network Span with Stand-Alone Hub  
Table 3-2 Maximum Hub Cascade  
2-9  
3-1  
3-3  
Table 3-3 Maximum Network Span with Fiber Optic Uplink 3-4  
Table B-1 RJ-45 Pin Assignments  
Table B-2 MII Pin Assignments  
B-1  
B-2  
Contents  
xi  
 

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