Part No. 206378-A
June 1999
4401 Great America Parkway
Santa Clara, CA 95054
Installation and Reference for the BayStack 60-12T/60-24T 10/100 Ethernet Hubs
Copyright © 1999 Nortel Networks
All rights reserved. Printed in the USA. June 1999.
The information in this document is subject to change without notice. The statements, configurations, technical data,
and recommendations in this document are believed to be accurate and reliable, but are presented without express or
implied warranty. Users must tak e full responsibility for their applications of an y products specified in this document.
The information in this document is proprietary to Nortel Networks NA Inc.
The software described in this document is furnished under a license agreement and may only be used in accordance
with the terms of that license. A summary of the Software License is included in this document.
Trademarks
Nortel Networks and BayStack are trademarks of Nortel Networks corporation.
All other trademarks and registered trademarks are the property of their respective owners.
Restricted Rights Legend
Use, duplication, or disclosure by the United States Government is subject to restrictions as set forth in subparagraph
(c)(1)(ii) of the Rights in Technical Data and Computer Software clause at DFARS 252.227-7013.
Notwithstanding any other license agreement that may pertain to, or accompany the delivery of, this computer
software, the rights of the United States Government regarding its use, reproduction, and disclosure are as set forth in
the Commercial Computer Software-Restricted Rights clause at FAR 52.227-19.
Statement of Conditions
In the interest of improving internal design, operational function, and/or reliability , Nortel Netw orks NA Inc. reserves
the right to make changes to the products described in this document without notice.
Nortel Networks NA Inc. does not assume any liability that may occur due to the use or application of the product(s)
or circuit layout(s) described herein.
Portions of the code in this software product are Copyright © 1988, Regents of the University of California. All rights
reserved. Redistribution and use in source and binary forms of such portions are permitted, provided that the above
copyright notice and this paragraph are duplicated in all such forms and that any documentation, advertising materials,
and other materials related to such distribution and use acknowledge that such portions of the software were de veloped
by the University of California, Berkele y. The name of the Univ ersity may not be used to endorse or promote products
derived from such portions of the software without specific prior written permission.
SUCH PORTIONS OF THE SOFTWARE ARE PROVIDED “AS IS” AND WITHOUT ANY EXPRESS OR
IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
In addition, the program and information contained herein are licensed only pursuant to a license agreement that
contains restrictions on use and disclosure (that may incorporate by reference certain limitations and notices imposed
by third parties).
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206378-A
Federal Communications Commission (FCC) Compliance Notice: Radio
Frequency Notice
Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to
Part 15 of the FCC rules. These limits are designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This equipment generates, uses, and can radiate radio
frequency energy. If it is not installed and used in accordance with the instruction manual, it may cause harmful
interference to radio communications. Operation of this equipment in a residential area is likely to cause harmful
interference, in which case users will be required to take whatever measures may be necessary to correct the
interference at their own expense.
EN 55 022 Statement
This is to certify that the Nortel Networks BayStack 60-12T and BayStack 60-24T 10/100 Ethernet Hubs are shielded
against the generation of radio interference in accordance with the application of Council Directive 89/336/EEC,
Article 4a. Conformity is declared by the application of EN 55 022 Class A (CISPR 22).
Warning: This is a Class A product. In a domestic environment, this product may cause radio interference, in which
case, the user may be required to take appropriate measures.
EC Declaration of Conformity
This product conforms (or these products conform) to the provisions of Council Directive 89/336/EEC and 73/23/
EEC. The Declaration of Conformity is available on the Nortel Networks World Wide Web site at
libra2.corpwest.baynetworks.com/cgi-bin/ndCGI.exe/DocView/
.
http://
Voluntary Control Council for Interference (VCCI) Statement
206378-A
iii
Voluntary Control Council for Interference (VCCI) Statement
This is a Class A product based on the standard of the Voluntary Control Council for Interference by Information
Technology Equipment (VCCI). If this equipment is used in a domestic environment, radio disturbance may arise.
When such trouble occurs, the user may be required to take corrective actions.
Electromagnetic Interference (EMI) Statement
Canadian Department of Communications Radio Interference Regulations
This digital apparatus (BayStack 60-12T and BayStack 60-24T 10/100 Ethernet Hubs) do not exceed the Class A
limits for radio-noise emissions from digital apparatus as set out in the Radio Interference Regulations of the
Canadian Department of Communications.
Règlement sur le brouillage radioélectrique du ministère des
Communications
Cet appareil numérique (BayStack 60-12T and BayStack 60-24T 10/100 Ethernet Hubs) respecte les limites de bruits
radioélectriques visant les appareils numériques de classe A prescrites dans le Règlement sur le brouillage
radioélectrique du ministère des Communications du Canada.
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206378-A
Wichtige Sicherheitshinweise
1. Bitte lesen Sie diese Hinweise sorgfaltig durch.
2. Heben Sie diese Anleitung fur den spateren Gebrauch auf.
3. Vor jedem Reinigen ist das Gerat vom Stromnetz zu trennen. Verwenden Sie keine Flussigoder Aerosolreiniger.
Am besten eignet sich ein angefeuchtetes Tuch zur Reinigung.
4. Die Netzanschlu Bsteckdose soll nahe dem Gerat angebracht und leicht zuganglich sein.
5. Das Gerat ist vor Feuchtigkeit zu schutzen.
6. Bei der Aufstellung des Gerates ist auf sicheren Stand zu achten. Ein Kippen oder Fallenkonnte Beschadigungen
hervorrufen.
7. Die Beluftungsoffnungen dienen der Luftzirkulation, die das Gerat vor Uberhitzung schutzt. Sorgen Sie dafur,
daB diese Offnungen nicht abgedeckt werden.
8. Beachten Sie beim AnschluB an das Stromnetz die AnschluBwerte.
9. Verlegen Sie die NetzanschluBleitung so, daB niemand daruber fallen kann. Es sollte auchnichts auf der Leitung
abgestellt werden.
10. Alle Hinweise und Warnungen, die sich am Gerat befinden, sind zu beachten.
11. Wird das Gerat uber einen langeren Zeitraum nicht benutzt, sollten Sie es vom Stromnetztrennen. Somit wird im
Falle einer Uberspannung eine Beschadigung vermieden.
12. Durch die Luftungsoffnungen durfen niemals Gegenstande oder Flussigkeiten in das Gerat gelangen. Dies konnte
einen Brand bzw. elektrischen Schlag auslosen.
13. Offnen sie niemals das Gerat. Das Gerat darf aus Grunden der elektrischen Sicherheit nur von authorisiertem
Servicepersonal geoffnet werden.
14. Wenn folgende Situationen auftreten ist das Gerat vom Stromnetz zu trennen und von einer qualifizierten
Servicestelle zu uberprufen:
(a) Netzkabel oder Netzstecker sind beschadigt.
(b) Flussigkeit ist in das Gerat eingedrungen.
(c) Das Gerat war Feuchtigkeit ausgesetzt.
(d) Wenn das Gerat nicht der Bedienungsanleitung entsprechend funktioniert oder Sie mit Hilfedieser Anleitung
keine Verbesserung erzielen.
(e) Das Gerat ist gefallen und/oder das Gehause ist beschadigt.
(f) Wenn das Gerat deutliche Anzeichen eines Defektes aufweist.
7. Zum NetzanschluB dieses Gerates ist eine geprufte Leitung zu verwenden. Fur einen Nennstrom bis 6A und
einem Gerategewicht groBer 3kg ist eine Leitung nicht leichter als H05VV-F, 3G, 0.75mm 2 einzusetzen.
Der arbeitsplatzbezogene Schalldruckpegel nach DIN 45 635 Teil 1000 betragt 70dB(A) oder weniger.
206378-A
v
Nortel Networks NA Inc. Software License Agreement
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206378-A
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206378-A
vii
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206378-A
Contents
Preface
Before You Begin ............................................................................................................. xv
Hard-Copy Technical Manuals .........................................................................................xvi
How to Get Help ..............................................................................................................xvi
Chapter 1
Introduction
Product Features ............................................................................................................1-1
Product Description ........................................................................................................1-2
Autosense Capability ...............................................................................................1-2
Front Panel ...............................................................................................................1-2
LEDs .................................................................................................................. 1-4
Port Functions ...................................................................................................1-5
Port Partitioning ...........................................................................................1-5
MDI/MDI-X Modes .......................................................................................1-5
MDI/MDI-X Button .............................................................................................1-6
Rear Panel ...............................................................................................................1-6
Hardware and Environmental Requirements ..................................................................1-6
Chapter 2
Typical Applications
Mixed 10 Mb/s and 100 Mb/s Environment ....................................................................2-1
Basic Mixed Network ................................................................................................2-2
Expanded Mixed Network ........................................................................................2-3
Bridging .................................................................................................................... 2-4
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ix
Chapter 3
Installation
Package Contents ..........................................................................................................3-1
Installing the Hub ............................................................................................................3-2
Mounting the Hub in a Standard 19” Equipment Rack .............................................3-2
Connecting the Hub To Other Devices ...........................................................................3-3
Cable Types and MDI/MDI-X Modes ........................................................................3-3
Connecting the Hub Through a RJ-45 Port ..............................................................3-4
Connecting the Hub Through the MDI Port ..............................................................3-5
Applying Power to the Hub .............................................................................................3-5
Verifying Port Status .................................................................................................3-6
Chapter 4
Troubleshooting
Verifying System Operations ....................................................................................4-1
Diagnosing Hub Indicators .......................................................................................4-2
Appendix A
Technical Specifications
Appendix B
Cable and Connector Information
Port Assignments .......................................................................................................... B-1
RJ-45 Ports .............................................................................................................B-1
MDI/MDI-X Ports .............................................................................................. B-1
RJ-45 Pin Assignments .................................................................................... B-1
Cable Assignments ........................................................................................................ B-2
Index
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Figures
Figure 1-1. BayStack 60-12T Front Panel ..................................................................1-3
Figure 1-2. BayStack 60-24T Front Panel ..................................................................1-3
Figure 1-3. BayStack 60-12T/60-24T Rear Panel ......................................................1-6
Figure 2-1. Example of a Basic Mixed Network .........................................................2-2
Figure 2-2. Example of an Expanded Mixed Network ................................................2-3
Figure 2-3. Daisy-Chained Hubs ................................................................................2-4
Figure 3-1. Rack Mounted Hubs ................................................................................3-2
Figure 3-2. Port Status LEDs .....................................................................................3-6
Figure B-1. RJ-45 Pin Assignments ........................................................................... B-1
Figure B-2. Cable Schematics ................................................................................... B-2
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xii
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Tables
Table 1-1. LED Descriptions .....................................................................................1-4
Table 3-1. Cables and MDI/MDI-X Modes for the BayStack 60-12T
10/100 Ethernet Hub ................................................................................3-3
Table 3-2. Cables and MDI/MDI-X Modes for the BayStack 60-24T
10/100 Ethernet Hub ................................................................................3-3
Table 3-3. Port Status LED Descriptions ..................................................................3-6
Table 4-1. LED Indicators .........................................................................................4-2
Table A-1. Product Specifications ........................................................................... A-1
Table B-1. RJ-45 Pin Descriptions ........................................................................... B-2
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xiv
206378-A
Preface
Congratulations on your purchase of a BayStack™ 60-12T/60-24T 10/100
Ethernet Hub. The BayStack 60-12T/60-24T 10/100 Ethernet Hubs enable you to
migrate easily from Ethernet to Fast Ethernet. You can migrate to Fast Ethernet
while maintaining much of your existing Ethernet network and equipment.
In this guide, the BayStack 60-12T and BayStack 60-24T 10/100 Ethernet Hub
are referred to collectively as the BayStack 60-12T/60-24T 10/100 Ethernet Hub,
or just as the “hubs.” Each model is referred to specifically when features and
functions are unique to that particular model.
Before You Begin
This guide is intended for users with the following background:
• Familiarity with network hardware and cable requirements
• Experience in installing rack-mounted network hardware
• Working knowledge of Ethernet (10 Mb/s, or 10BASE-T) and Fast Ethernet
(100 Mb/s, or 100BASE-T) operations
206378-A
xv
Installation and Reference for the BayStack 60-12T/60-24T 10/100 Ethernet Hubs
Hard-Copy Technical Manuals
You can print selected technical manuals and release notes free, directly from the
Internet. Go to
support.baynetworks.com/library/tpubs/
. Find the product for
which you need documentation. Then locate the specific category and model or
version for your hardware or software product. Using Adobe Acrobat Reader , you
can open the manuals and release notes, search for the sections you need, and print
them on most standard printers. You can download Acrobat Reader free from the
Adobe Systems Web site,
www.adobe.com
.
You can purchase selected documentation sets, CDs, and technical publications
through the collateral catalog. The catalog is located on the World Wide Web at
support.baynetworks.com/catalog.html
and is divided into sections arranged
alphabetically:
• The “CD ROMs” section lists available CDs.
• The “Guides/Books” section lists books on technical topics.
• The “Technical Manuals” section lists available printed documentation sets.
How to Get Help
xvi
If you purchased a service contract for your Nortel Networks product from a
distributor or authorized reseller, contact the technical support staff for that
distributor or reseller for assistance.
If you purchased a Nortel Networks service program, contact one of the following
Nortel Networks Technical Solutions Centers:
Technical Solutions Center Telephone Number
Billerica, MA 800-2LANWAN (800-252-6926)
Santa Clara, CA 800-2LANWAN (800-252-6926)
Valbonne, France 33-4-92-96-69-68
Sydney, Australia 61-2-9927-8800
Tokyo, Japan 81-3-5402-7041
206378-A
Chapter 1
Introduction
The BayStack 60-12T/60-24T 10/100 Ethernet Hubs provide 12 or 24 RJ-45 ports
for 10 Mb/s or 100 Mb/s Ethernet/Fast Ethernet connections. Ten or 100 Mb/s
traffic is determined by the autosensing capability of the RJ-45 ports in the
BayStack 60-12T/60-24T 10/100 Ethernet Hubs.
Design features of the BayStack 60-12T/60-24T 10/100 Ethernet Hubs provide a
user friendly interface, simplifying installation and network troubleshooting.
Product Features
The BayStack 60-12T/60-24T 10/100 Ethernet Hub provides the following
features:
• 12/24 autosensing 10/100 Mb/s Ethernet ports with internal switching/
bridging hardware
• One MDI/MDI-X port, selected by a push button
• Support for IEEE 802.3 10BASE-T and IEEE 802.3u 100BASE-TX standards
• Transparent bridging between 10 Mb/s and 100 Mb/s segments through an
internal switch module
• Support for autopartitioning and reconnection features to facilitate faulty
segment isolation
• Polarity autodetection and autocorrection for 10 Mb/s segment UTP/STP
ports
• Automatic jabber handling functions
• Extensive front panel LEDs provide all information at a glance
• Plug-and-play connection
206378-A
1-1
Installation and Reference for the BayStack 60-12T/60-24T 10/100 Ethernet Hubs
• Up to 2 units can be daisy-chained (Class II Repeater)
• Separates network traffic into two network collision domains (10Mb/s,
100Mb/s)
• Store-and-forward packet transmission methods
Product Description
Package contents of the BayStack 60-12T/60-24T 10/100 Ethernet Hub include
materials for rack mounting and connecting the hubs, such as a rack mount kit and
an AC power cord. Standard Ethernet UTP or STP cables are not provided.
Autosense Capability
BayStack 60-12T/60-24T 10/100 Ethernet Hub ports automatically sense the
10 Mb/s or 100 Mb/s transmission speed of attached devices. Each port
automatically sends traffic through the route with the highest available
transmission speed, depending on the capability of the connected device. T raff ic is
forwarded to the 10 or 100 Mb/s segment on the hub, again depending on the
incoming speed of the traffic. By confining traffic to its respective segments and
only forwarding traffic to the other se gment when required, the ov erall load on the
network is significantly reduced.
Front Panel
1-2
The BayStack 60-12T/60-24T 10/100 Ethernet Hub includes front panel LEDs
and ports for connecting to other devices.
Figure 1-1
Ethernet Hub and BayStack 60-24T 10/100 Ethernet Hub, respectively. Table 1-1
on page 4
and Figure 1-2 show the front panels of the BayStack 60-12T 10/100
provides further details about the LEDs.
206378-A
A
Introduction
MDI/MDI-X
Button
MDIX/MDI
123456 789101112
10BASE-T/100BASE-TX Ports
Power On
Power
LED
Utlization %
10M
35
10 20 40>
1
Collision
100M
Collision and
Utilization LEDs
Figure 1-1. BayStack 60-12T Front Panel
MDI/MDI-X
Button
1257911
MDIX/MDI
2 4 6 8 10 12
10BASE-T/100BASE-TX Ports
Power On
Power
LED
Utlization %
10M
1
Collision
35
10 20 40>
100M
Collision and
Utilization LEDs
13 15 17 19 21 23
14 16 18 20 22 24
10/100 Link/Activity and
Partition LEDs
1334567
9101112
8
10/100 Link/Activity and
Partition LEDs
135791113
1 4 6 8 10 12 14 16 18 20 22 24
15 17 19 21 23
10/100 Link/Activity
Partition
10/100 Link/Activity
Partition
10/100 Link/Activity
Partition
60-12T Hub
9239EA
60-24T Hub
9246E
Figure 1-2. BayStack 60-24T Front Panel
206378-A
1-3
Installation and Reference for the BayStack 60-12T/60-24T 10/100 Ethernet Hubs
LEDs
This section describes the LEDs on the front panel of the
BayStack 60-12T/60-24T 10/100 Ethernet Hub. Table 1-1
Table 1-1. LED Descriptions
LED Color Activity Indication
Power Green On Power is supplied to the hub.
Utilization %
10 Mb/s
Green
On
Data transmission is occurring on a 10 Mb/s network
segment at the indicated rate.
describes the LEDs.
100 Mb/s
Collision
10 Mb/s
100 Mb/s
10/100
Link/Activity
Partition Yellow On Partitioning has occurred at a port.
Green
Yellow
Yellow
Yellow
Green
On
On
On
On
Blinking
On
Blinking
Data transmission is occurring on a 100 Mb/s network
segment at the indicated rate.
Data collision is occurring on a 10 Mb/s network segment.
Data collision is occurring on a 100 Mb/s network
segment.
The port is connected to a 10 Mb/s segment.
Data is being received to a 10 Mb/s segment.
The port is connected to a 100 Mb/s segment.
Data is being received to a 100 Mb/s segment.
The Link/Activity LEDs display whether a 10 Mb/s port
(yellow) or a 100 Mb/s port (green) is partitioned when the
yellow partition LED is lit for a specific port.
1-4
206378-A
Introduction
Port Functions
This section describes port partitioning and MDI/MDI-X modes. Partitioning is an
automatic function of BayStack 60-12T/60-24T 10/100 Ethernet Hub ports.
Certain ports can be configured to MDI/MDI-X mode with the MDI/MDI-X
button.
Port Partitioning
A port is automatically disabled by the hub when a serious error occurs, such as
continuous collisions on a single packet. This process is known as
autopartitioning. A partitioned port indicates an overloaded network or a
malfunctioning device on the network. When the port receiv es a v alid packet from
the connected device, or is able to transmit a packet from the port, it automatically
releases the port so that it becomes active again.
• Partitioning occurs at a 100 Mb/s port when there are 61 consecutive
collisions.
• Partitioning occurs at a 10 Mb/s port when there are 32 consecutive collisions,
or when one collision lasting as long as 575.2us has occurred.
206378-A
MDI/MDI-X Modes
Adapter cards in computers and workstations usually contain media-dependent
interface (MDI) ports, also called uplink ports. Most hub ports are configured as
media-dependent interfaces with built-in crossov er ports, called MDI-X or normal
ports. By default, all BayStack 60-12T/60-24T 10/100 Ethernet Hub ports are set
to MDI-X, or normal, mode. You can connect your hub to computers and
workstations in MDI-X mode using a standard straight-through cable.
You need a crossover cable to connect your hub to other hubs, switches and
routers if you are using a hub port in normal, MDI-X, mode. You can use a
straight-through cable to connect to these devices if you configure a port on your
hub to the uplink mode.
You can configure port 1 on the BayStack 60-12T/60-24T 10/100 Ethernet Hub
from normal to uplink mode with the MDI/MDI-X button.
Refer to “
Cable T ypes and MDI/MDI-X Modes” on page 3-3 for details regarding
which cable or mode to use for specific devices.
1-5
Installation and Reference for the BayStack 60-12T/60-24T 10/100 Ethernet Hubs
MDI/MDI-X Button
The MDI/MDI-X button sets port 1 on the BayStack 60-12T/60-24T 10/100
Ethernet Hub from a normal (MDI-X) port to an uplink (MDI) port. Set the MDI/
MDI-X button to uplink (MDI) mode to connect your BayStack 60-12T/60-24T
10/100 Ethernet Hub to another Ethernet hub or switch using a standard
straight-through Ethernet cable.
Refer to “
Cable T ypes and MDI/MDI-X Modes” on page 3-3 for details regarding
using straight-through or crossover cables to connect your BayStack 60-12T/
60-24T 10/100 Ethernet Hub to various network devices.
Rear Panel
The rear panel (Figure 1-3) of the BayStack 60-12T/60-24T 10/100 Ethernet Hub
includes a standard AC power cord receptacle.
Figure 1-3. BayStack 60-12T/60-24T Rear Panel
Hardware and Environmental Requirements
The following environmental and hardware specifications are required for proper
installation and function of your hub:
• Power - 100 to 240 V AC (+/- 10 %), 50 to 60 Hz (+/- 3 Hz)
9259EA
1-6
• The hub should be located in a cool, dry place, with at least 10 cm (4 inches)
of space in front and behind the hub for ventilation.
• Do not place the hub in direct sunlight. Keep the hub away from heat sources
or areas with high amounts of electromagnetic interference.
• If you intend to mount the hub in a rack, make sure you have adequate
mounting screws, brackets, bolts, nuts, and appropriate tools.
• Be sure you have all necessary network cables and connectors.
206378-A
Chapter 2
Typical Applications
The BayStack 60-12T/60-24T 10/100 Ethernet Hubs provide flexibility in
configuring your network. You can use the hubs in a standalone configuration, or
in multiple hub configurations to utilize your existing Ethernet and Fast Ethernet
equipment. You can stack the hubs on top of each other on a flat surface, or mount
them in standard 19” equipment racks. In addition to attaching your hub to
workstations or printers, you can extend your current local area network (LAN) by
connecting a BayStack 60-12T/60-24T 10/100 Ethernet Hub to a collapsed
backbone device such as a switch or a router.
This chapter discusses various environments where you can use the BayStack
60-12T/60-24T 10/100 Ethernet Hub, such as environments which have a mixed
network of 10 Mb/s and 100 Mb/s devices.
Mixed 10 Mb/s and 100 Mb/s Environment
The BayStack 60-12T/60-24T 10/100 Ethernet Hub runs at both 10 Mb/s and
100 Mb/s simultaneously. Devices running at 10 Mb/s and devices running at
100 Mb/s are located on separate network segments within one BayStack 60-12T/
60-24T 10/100 Ethernet Hub. These two segments communicate with the internal
switching hardware, which is built in to the hub.
206378-A
2-1
Installation and Reference for the BayStack 60-12T/60-24T 10/100 Ethernet Hubs
Basic Mixed Network
Figure 2-1 shows a basic use of the BayStack 60-12T/60-24T 10/100 Ethernet
Hub in a simple mixed environment network. The hub connects various
workstations to each other. Workstations can be operating at 10 Mb/s and/or
100 Mb/s.
208-24T Hub
Key
PCs
10 Mb/s
100 Mb/s
Power
Users
9333EA
Figure 2-1. Example of a Basic Mixed Network
The example shows a BayStack 60-24T 10/100 Ethernet Hub. However, you can
use a BayStack 60-12T 10/100 Ethernet Hub instead, depending on the number of
devices you need to connect.
2-2
206378-A
Expanded Mixed Network
Figure 2-2 shows an expanded mixed network using two BayStack 60-24T 10/100
Ethernet Hubs connected to each other and to several devices. The devices use
10 Mb/s and 100 Mb/s speeds.
Printers
Key
10 Mb/s
100 Mb/s
Servers
Typical Applications
Power
users
208-24T Hub
208-24T Hub
PCs Power
user
9334EA
206378-A
Figure 2-2. Example of an Expanded Mixed Network
The example shows two BayStack 60-24T 10/100 Ethernet Hubs. However, you
can use two BayStack 60-12T 10/100 Ethernet Hubs instead, or one 12-port hub
and one 24-port hub, depending on the number of devices you need to connect.
2-3
Installation and Reference for the BayStack 60-12T/60-24T 10/100 Ethernet Hubs
Figure 2-3 shows the specific ports used to connect two hubs, as in the expanded
network in Figure 2-2
. Port 1 on the top hub is set to MDI (uplink) with the MDI/
MDI-X button. A UTP/STP Ethernet cable connects port 1 of the top hub to
another non-MDI port on the second hub. This type of connection is known as
“daisy-chaining.”
Bridging
Set
to MDI
208-24T Hub
208-24T Hub
9336EA
Figure 2-3. Daisy-Chained Hubs
The internal switching hardware of the hub bridges the two collision domains, the
10 Mb/s and 100 Mb/s segments. The switching hardware handles the bridging,
which allows 10 Mb/s and 100 Mb/s segments to talk to each other.
2-4
206378-A
You can stack the BayStack 60-12T/60-24T 10/100 Ethernet Hubs on a flat
surface, or mount them in a standard 19” equipment rack. This chapter explains
how to mount or stack your hubs, how to connect and power up the hub, and how
to troubleshoot hub operations. Before installing the hub, be sure your
environment meets the requirements defined in “
Requirements” on page 1-6.
Package Contents
Chapter 3
Installation
Hardware and Environmental
206378-A
The contents of your product package should contain the following items:
• One of the following BayStack 60 Series Hubs:
— BayStack 60-12T 10/100 Ethernet Hub (12 port 10/100 Mb/s hub)
— BayStack 60-24T 10/100 Ethernet Hub (24 port 10/100 Mb/s hub)
• One mounting kit, including brackets and screws, for mounting the hub in a
standard 19” equipment rack
• Appropriate power cord
3-1
Installation and Reference for the BayStack 60-12T/60-24T 10/100 Ethernet Hubs
Installing the Hub
You can stack hubs on a flat surface or you can mount the hubs in a standard
19” equipment rack.
Mounting the Hub in a Standard 19” Equipment Rack
You can mount BayStack 60-12T/60-24T 10/100 Ethernet Hubs in a rack, such as
in a wiring closet or network center.
Figure 3-1
shows three hubs mounted in a standard rack.
1
Power On
10M
Utlization %
Collision
1
3
100M
5
10
20
40>
Power On
10M
Utlization %
Collision
1
3
100M
5
10
20
40>
Power On
10M
Utlization %
Collision
1
3
100M
5
10
20
40>
2
5
MDIX/MDI
2
4
6
MDIX/MDI
1
2
3
MDIX/MDI
1
2
3
Figure 3-1. Rack Mounted Hubs
7
8
45
4
9
11
13
15
17
19
21
23
1
3
10
12
14
16
18
6
7
8
9
5
6
7
8
910
5
7
9
11
13
15
17
60-24T Hub
19
21
23
20
22
1
24
4
6
8
10
11
12
1
3
3
11
12
1
3
3
10/100 Link/Activity
Partition
10
12
10/100 Link/Activity
14
16
18
20
Partition
22
24
4
5
4
5
60-12T Hub
6
7
8
9
10
11
12
10/100 Link/Activity
Partition
60-12T Hub
6
7
8
9
10
11
12
10/100 Link/Activity
Partition
9241EA
3-2
To mount hubs in a standard EIA 19” equipment rack:
Gather the brackets and screws included in the package that shipped
1.
with your hub.
Attach one bracket to each of the front sides of the hub using a cross-head
2.
screwdriver.
Align the front bracket holes with corresponding holes in the rack.
3.
206378-A
y
y
Insert the screws into the front of the bracket, through the rack, so that
4.
the screws extend past the rack.
Tighten the screws.
5.
Connecting the Hub To Other Devices
You can connect hubs to other network devices through the dual-speed MDI/
MDI-X RJ-45 port on the front of the hub.
Cable Types and MDI/MDI-X Modes
You can use standard straight through Ethernet cables to connect your hub to PCs,
printers, or servers. If you want to connect your BayStack 60-12T/60-24T 10/100
Ethernet Hub to routers, switches, and other hubs you must use a crossover cable
unless you set the MDI/MDI-X button to uplink. You can only configure port 1
with the MDI/MDI-X button.
Installation
Table 3-1
for various devices when connecting from the
Hub
Table 3-1. Cables and MDI/MDI-X Modes for the
and Table 3-2 show which cable types and MDI/MDI-X modes to use
Stack 60-12T 10/100 Ethernet
Ba
or
Stack 60-24T 10/100 Ethernet Hub
Ba
, respectively.
BayStack 60-12T 10/100 Ethernet
Hub
Hub Port Connecting Device Mode Cable Type
1 through 12 PC, server MDI-X (normal) Straight-through
1 through 12 Hub, router, switch MDI-X (normal) Crossover
1 Hub, router, switch MDI (uplink) Straight-through
Table 3-2. Cables and MDI/MDI-X Modes for the
BayStack 60-24T 10/100 Ethernet
Hub
Hub Port Connecting Device Mode Cable Type
1 through 24 PC, server MDI-X (normal) Straight-through
1 through 24 Hub, router, switch MDI-X (normal) Crossover
1 Hub, router, switch MDI (uplink) Straight-through
206378-A
3-3
Installation and Reference for the BayStack 60-12T/60-24T 10/100 Ethernet Hubs
Connecting the Hub Through a RJ-45 Port
You can connect a BayStack 60-12T/60-24T 10/100 Ethernet Hub to any device
that has a standard RJ-45 network interface port. To connect simple devices such
as workstations or servers, or more complex devices such as bridges or routers to
the hub, use a standard RJ-45 port.
To connect the hub to another device through a RJ-45 Port:
Make sure the devices you want to connect to contain 10BASE-T or
1.
100BASE-T network interface cards.
Obtain one straight through shielded or unshielded twisted pair cable
2.
(STP or UTP) with RJ-45 connectors at each end for each device.
• Use 100 Ohm Category 3, 4, or 5 cable for 10 Mb/s Ethernet connections.
• Use 100 Ohm Category 5 cable for 100 Mb/s Ethernet connections.
Category 5 cable is recommended for all connections to avoid confusion
between cables, and to provide for easy future migration of all devices to
Fast Ethernet.
• Each cable must be 100 meters long or less.
3-4
Connect one RJ-45 connector of the cable to the network interface card
3.
of your device.
Connect the other RJ-45 connector of the cable to any available MDI-X,
4.
or normal, port on the hub.
By default, all ports on the BayStack 60-12T/60-24T 10/100 Ethernet Hub
except port 1 are MDI-X. The RJ-45 ports support both 10 Mb/s and
100 Mb/s Ethernet connections.
Be sure the tab on each RJ-45 connector clicks securely into position.
5.
Warning: Do not connect a phone jack connector to a RJ-45 port. You may
damage the hub. Use only twisted pair Ethernet cables with RJ-45 connectors
that comply with FCC standards.
206378-A
Connecting the Hub Through the MDI Port
You can connect BayStack 60-12T/60-24T 10/100 Ethernet Hubs to other
compatible hubs or switches through port 1 on the front panel of the hub, setting
the MDI/MDI-X button to uplink.
To connect to another device through the MDI port:
Insert an RJ-45 connector of a straight-through twisted pair Ethernet
1.
cable into port 1 of your hub.
You can configure port 1 to uplink or normal mode using the MDI/MDI-X
button.
Set the MDI/MDI-X button next to port 1 to MDI, or uplink.
2.
Insert the other RJ-45 connector in to any MDI-X port on another device.
3.
You can also connect this RJ-45 connector to a MDI port on another device set
up as a daisy-chain configuration.
Applying Power to the Hub
Installation
206378-A
To apply power to your hubs:
Plug the power cord into the power socket in the rear of the hub.
1.
Plug the other end of the power cord into a standard power outlet.
2.
The hub will automatically select the setting that matches the connected input
voltage. No additional adjustments are necessary when you connect the hub to
any input voltage, as long as the voltage range is within the range marked on
the rear panel.
Check the Power LED on the front panel.
3.
The Power LED should be on. The hub will perform a self-diagnostic test
during the power on process.
Note: The hub supports a “hot remove” feature which permits you to connect
or disconnect cables without powering off the hub. Operation of devices
attached to the hub is not disrupted.
3-5
Installation and Reference for the BayStack 60-12T/60-24T 10/100 Ethernet Hubs
60-24T Hu
135791113
10/100 Link/Activity
Partition
10/100 Link/Activity
Partition
15 17 19 21 23
1 4 6 8 10 12 14 16 18 20 22 24
24
23
60-12T Hu
1334567
10/100 Link/Activity
Partition
8
9101112
12
Verifying Port Status
You can check the status of each cable connection by viewing the port status
indicators shown in Figure 3-2
13 15 17 19 21 23
1257911
MDIX/MDI
Utlization %
10M
35
10 20 40>
1
Collision
Power On
100M
2 4 6 8 10 12
MDIX/MDI
12345 6 78 9101112
Utlization %
10M
35
10 20 40>
1
Collision
Power On
100M
14 16 18 20 22 24
135791113
1 4 6 8 10 12 14 16 18 20 22 24
and described in Table 3-3.
60-24T Hub
15 17 19 21 23
10/100 Link/Activity
Partition
10/100 Link/Activity
Partition
60-12T Hub
1334567
9101112
8
10/100 Link/Activity
Partition
Table 3-3. Port Status LED Descriptions
LED State Indication
Power On (green) The hub is receiving power.
Collision Flashing (yellow) A packet collision occurred in the 10/100 Mb/s domain.
Activity Flashing (green) The port is receiving 10/100 Mb/s traffic.
Partition On (yellow) The port has been partitioned from the network.
Link 10/100M On (green) The port has established a valid 100 Mb/s network connection.
3-6
9247EA
Figure 3-2. Port Status LEDs
Table 3-3 describes the light and color indications of port status LEDs.
On (yellow) The port has established a valid 10 Mb/s network connection.
206378-A
This chapter provides common testing methods, possible reasons for problems,
and possible steps to take to solve the problems.
Verifying System Operations
You can verify that all attached devices have v alid connections. The hub monitors
the link status for each port. If a device is properly connected to the hub and if the
device is transmitting a link signal, the Link indicator will light up for the
corresponding port.
Chapter 4
Troubleshooting
206378-A
Follow these steps if the Link indicator fails to light when you connect a de vice to
the hub:
Verify that the twisted-pair cable is properly attached to the connected
1.
device and the hub.
Verify that the media connector, or RJ-45 connector, snaps securely into
2.
place when attached.
Verify that your cable is functioning properly. Try attaching the cable to
3.
another port on another attached device that appears to be functioning
properly.
Check the length of each twisted-pair cable.
4.
• Each cable should be no longer than 100 meters, or 328 feet, long.
• If you are using two cascaded Fast Ethernet hubs be sure the cable
between the two hubs is no longer than 5 meters, or 16 feet, long.
Verify that the attached workstation has a functioning adapter card.
5.
Try the card in another workstation that is successfully connecting to the
network.
4-1
Installation and Reference for the BayStack 60-12T/60-24T 10/100 Ethernet Hubs
Diagnosing Hub Indicators
You can easily monitor the hub through LED indicators on the front panel.
Table 4-1
Table 4-1. LED Indicators
Symptom Cause Solution
describes common problems and possible solutions.
The Link 10/100 Mb/s
indicator does not
light up after making a
connection.
The Powe r indicator
does not light up
(green) after powering
on.
The hub powers off
after running for a
time.
A network interface, such as
an adapter card on the
attached device, a network
cable, or the hub port is
defective.
A power outlet, power cord, or
internal power supply is
defective.
Loose connections, or power
surges or losses may have
occurred.
• Verify that the hub and attached device are
powered on.
• Be sure the cable is securely plugged into the
hub and the device.
• Verify the proper cable length is being used.
• Check the adapter or cable connections for
defects. Replace defective parts.
• Check the power outlet by plugging in another,
properly functioning, device.
• Check the power cord b y plugging it into
another, properly functioning, device.
• If you still do not have power, contact Customer
Support, as explained in “
page xvi for assistance.
• Check for loose power connections. Verify all
connections are seated securely.
• Determine if power surges or losses occurred at
the power outlet.
• Verify that the fan on the back of the hub is
unobstructed and running.
How to Get Help” on
4-2
206378-A
Appendix A
Technical Specifications
Table A-1 provides technical information regarding product specifications, port
and cable assignments, and EMI certification.
Table A-1. Product Specifications
Item Description
Standards Conformance IEEE 802.3 Ethernet, IEEE 802.3u Fast Ethernet
Access Method CSMA/CD, 10 Mb/s, or 100 Mb/s
Communication Rate 10/100 Mb/s on RJ-45 ports
Media Supported 10 BASE-T - 100 Ohm Category 3, 4, 5 twisted pair
100 BASE-TX - 100 Ohm Category 5 twisted pair
Ports • 12/24 10/100 Autosensing RJ-45 Ethernet ports
• Port 1 can be set to normal (MDI -X) or uplink (MDI) mode
LED indicators Port status, port link, port partition, collision, activity, 10/100 Mb/s
traffic, and power.
Dimensions 482.6 x 204 x 44 mm (19 x 8 x 1.72 inches)
Weight 2.1 kg (4.6 lb)
Input Pow er Full range power input:
100 to 240 V AC
50 to 60 Hz
Power Consumption 2.0 A max. @ 100-240 V AC
Heat Dissipation 92.1 BTU/hr max. @ 100-240 V AC
°
Operating Temperature 0
Operating Humidity 80% maximum humidity, noncondensing
C to 40°C (32°F to 104°F)
206378-A
A-1
Installation and Reference for the BayStack 60-12T/60-24T 10/100 Ethernet Hubs
Table A-1. Product Specifications (continued)
Item Description
Certification
Emissions
Immunity
Safety
Internal Switching Specifications
Network Bridging Function Filtering, forwarding, and learning
Switching Method Store-and-forward
Address Table 8K entries
Queue Buffer 512K bytes
Filtering Rate Line speed
Forwarding Rate Line speed
CE Mark
FCC Class A,
VCCI Class A,
CISPR Class A,
BCIQ, AZ/NZS Class A
IEC 1000-4-2/3/4/6
CSA/NRTL, TUV/GS, NOM, UL
A-2
206378-A
Port Assignments
RJ-45 Ports
This section describes MDI/MDI-X modes and their associated ports, and
provides details regarding RJ-45 port pin assignments.
MDI/MDI-X Ports
Appendix B
Cable and Connector Information
206378-A
You can attach the RJ-45 MDI-X ports on the hub to any device, such as routers,
servers, or workstations, that uses a standard network interface.
You can daisy-chain RJ-45 MDI ports on the hub to a port on similar networking
devices, such as switches or other hubs.
RJ-45 Pin Assignments
Figure B-1
Pin Assignments
Figure B-1. RJ-45 Pin Assignments
shows the pin assignments in the RJ-45 connector.
1 8
87654321
RJ-45 male
connector
9242EA
B-1
Installation and Reference for the BayStack 60-12T/60-24T 10/100 Ethernet Hubs
Table B-1 describes the pin assignments.
Table B-1. RJ-45 Pin Descriptions
Pin Number
1 Input Receive Data + Output Transmit Data +
2 Input Receive Data - Output Transmit Data 3 Output Transmit Data + Input Receive Data +
6 Output Transmit Data - Input Receive Data -
4, 5, 7, 8 Not used Not used
Cable Assignments
You can use unshielded twisted-pair (UTP) or shielded twisted-pair (STP) cable to
connect to RJ-45 ports.
Use the following cable categories, depending on the type of Ethernet
transmissions on your device.
• 10 BASE-T - 100 Ohm Category 3, 4, 5 twisted pair
• 100 BASE-TX - 100 Ohm Category 5 twisted pair
Figure B-2
cables.
shows schematics for straight-through and crossover twisted-pair
Assignment (Station Ports
1 through 12 or 24)
Assignment (Daisy-Chain Port,
other Devices)
B-2
Straight-Through
(Hub) (Adapter)
1
2
3
6
IRD+
IRD-
OTD+
OTD-
1
2
3
6
OTD+
OTDIRD+
IRD-
(Hub) (Hub)
1
2
3
OTD+
6
Figure B-2. Cable Schematics
IRD+
IRD-
OTD-
Crossover
1
2
3
6
IRD+
IRDOTD+
OTD-
9243EA
206378-A
A
applications
10 or 100 Mb/s only environments, 2-1
basic mixed network, 2-2
expanded mixed network, 2-3
mixed 10 and 100 Mb/s environments, 2-1
autopartitioning, 1-5
autosense capability, overview, 1-2
B
bridging, 2-4
C
cable length, between hubs, 4-1
cable schematics, B-2
cable types
for 10 Mb/s Ethernet connections, 3-4
for 100 Mb/s Ethernet connections, 3-4
using with MDI/MDI-X modes, 3-3
compliance certifications, A-2
connections
daisy-chaining, 2-4
power cord, 1-6, 3-5
with an MDI port, 3-5
customer support, xvi
Index
F
front panel
BayStack 60-12T 10/100 Ethernet Hub, 1-2
BayStack 60-24T 10/100 Ethernet Hub, 1-3
I
installation
connecting to other devices, 3-3
mounting the hub in a standard equipment rack, 3-2
L
LEDs
description, 1-4
diagnosing indicators, 4-2
indicators, 4-2
port status descriptions, 3-6
port status overview, 3-6
M
MDI port, 3-5
MDI/MDI-X button, 1-6
modes
MDI/MDI-X, 1-5
normal, 1-5
uplink, 1-6
D
daisy-chain connection, 2-4
E
environmental requirements, 1-6
206378-A
N
normal mode, 1-5
Index-1
P
port partitioning, 1-5
port status LED descriptions, 3-6
ports
normal, 1-5
RJ-45, B-1
uplink, 1-5
power, applying to hub, 3-5
product support, xvi
publications
hard copy, xvi
R
rear panel, 1-6
RJ-45 ports
connecting, 3-4
MDI/MDI-X, B-1
pin
assignments, B-1
descriptions, B-2
S
straight-through cable, 1-5
support, Nortel Networks, xvi
T
technical publications, xvi
technical support, xvi
U
uplink mode, 1-6
V
verifying system operations, 4-1
Index-2
206378-A
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