Nortel Networks Switch 60 12T User Manual

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  
 
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 http://  
libra2.corpwest.baynetworks.com/cgi-bin/ndCGI.exe/DocView/.  
Voluntary Control Council for Interference (VCCI) Statement  
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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.  
iv  
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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  
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Nortel Networks NA Inc. Software License Agreement  
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206378-A  
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Contents  
Preface  
Before You Begin ............................................................................................................. xv  
Hard-Copy Technical Manuals .........................................................................................xvi  
How to Get Help ..............................................................................................................xvi  
Port Partitioning ...........................................................................................1-5  
MDI/MDI-X Button .............................................................................................1-6  
Rear Panel ...............................................................................................................1-6  
Hardware and Environmental Requirements ..................................................................1-6  
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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Cable Types and MDI/MDI-X Modes ........................................................................3-3  
Connecting the Hub Through the MDI Port ..............................................................3-5  
Applying Power to the Hub .............................................................................................3-5  
Verifying Port Status .................................................................................................3-6  
Troubleshooting  
Diagnosing Hub Indicators .......................................................................................4-2  
Appendix A  
Technical Specifications  
Port Assignments .......................................................................................................... B-1  
MDI/MDI-X Ports .............................................................................................. B-1  
RJ-45 Pin Assignments .................................................................................... B-1  
Cable Assignments ........................................................................................................ B-2  
Index  
x
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Figures  
Figure 1-3. BayStack 60-12T/60-24T Rear Panel ......................................................1-6  
Figure 2-2. Example of an Expanded Mixed Network ................................................2-3  
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.  
Table 3-2.  
Table 3-3.  
Cables and MDI/MDI-X Modes for the BayStack 60-12T  
Cables and MDI/MDI-X Modes for the BayStack 60-24T  
Port Status LED Descriptions ..................................................................3-6  
LED Indicators .........................................................................................4-2  
Product Specifications ........................................................................... A-1  
RJ-45 Pin Descriptions ........................................................................... B-2  
Table 4-1.  
Table A-1.  
Table B-1.  
206378-A  
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xiv  
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Preface  
Congratulations on your purchase of a BayStack60-12T/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  
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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  
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  
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)  
800-2LANWAN (800-252-6926)  
33-4-92-96-69-68  
Santa Clara, CA  
Valbonne, France  
Sydney, Australia  
Tokyo, Japan  
61-2-9927-8800  
81-3-5402-7041  
xvi  
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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  
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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. Traffic 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 segment when required, the overall load on the  
network is significantly reduced.  
Front Panel  
The BayStack 60-12T/60-24T 10/100 Ethernet Hub includes front panel LEDs  
and ports for connecting to other devices.  
Figure 1-1 and Figure 1-2 show the front panels of the BayStack 60-12T 10/100  
Ethernet Hub and BayStack 60-24T 10/100 Ethernet Hub, respectively. Table 1-1  
on page 4 provides further details about the LEDs.  
1-2  
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Introduction  
MDI/MDI-X  
Button  
10/100 Link/Activity and  
Partition LEDs  
60-12T Hub  
MDIX/MDI  
1
2
3
4
5
6
7
8
9
10  
11  
12  
1
3
3
4
5
6
7
8
9
10  
11  
12  
Utlization %  
10M  
10/100 Link/Activity  
Collision  
1
3
5
10  
20  
40>  
Power On  
100M  
Partition  
Power  
LED  
Collision and  
Utilization LEDs  
10BASE-T/100BASE-TX Ports  
9239EA  
Figure 1-1.  
BayStack 60-12T Front Panel  
MDI/MDI-X  
Button  
10/100 Link/Activity and  
Partition LEDs  
1
2
5
7
9
11  
13  
15  
17  
19  
21  
23  
60-24T Hub  
1
3
5
7
9
11  
13  
15  
17  
19  
21  
23  
MDIX/MDI  
10/100 Link/Activity  
Partition  
Utlization %  
10M  
10/100 Link/Activity  
Partition  
Collision  
1
3
5
10  
20  
40>  
Power On  
100M  
1
4
6
8
10  
12  
14  
16  
18  
20  
22  
24  
2
4
6
8
10  
12  
14  
16  
18  
20  
22  
24  
Power  
LED  
Collision and  
Utilization LEDs  
10BASE-T/100BASE-TX Ports  
9246EA  
Figure 1-2.  
BayStack 60-24T Front Panel  
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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 describes the LEDs.  
Table 1-1.  
LED Descriptions  
LED  
Color  
Activity  
Indication  
Power  
Green  
On  
Power is supplied to the hub.  
Utilization %  
10 Mb/s  
Green  
Green  
On  
On  
Data transmission is occurring on a 10 Mb/s network  
segment at the indicated rate.  
100 Mb/s  
Data transmission is occurring on a 100 Mb/s network  
segment at the indicated rate.  
Collision  
10 Mb/s  
Yellow  
Yellow  
On  
On  
Data collision is occurring on a 10 Mb/s network segment.  
100 Mb/s  
Data collision is occurring on a 100 Mb/s network  
segment.  
10/100  
Link/Activity  
Yellow  
On  
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.  
Blinking  
On  
Green  
Yellow  
Blinking  
On  
Data is being received to a 100 Mb/s segment.  
Partitioning has occurred at a port.  
Partition  
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  
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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 receives a valid 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.  
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 crossover 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  
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 Types and MDI/MDI-X Modes” on page 3-3 for details regarding  
which cable or mode to use for specific devices.  
206378-A  
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Installation and Reference for the BayStack 60-12T/60-24T 10/100 Ethernet Hubs  
MDI/MDI-X Button  
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 Types 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.  
9259EA  
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)  
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.  
1-6  
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  
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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  
PCs  
Power  
Users  
Key  
10 Mb/s  
100 Mb/s  
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  
 
     
Typical Applications  
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.  
Power  
users  
Printers  
208-24T Hub  
208-24T Hub  
Key  
10 Mb/s  
100 Mb/s  
PCs  
Power  
user  
Servers  
9334EA  
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.  
206378-A  
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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.”  
208-24T Hub  
Set  
to MDI  
208-24T Hub  
9336EA  
Figure 2-3.  
Daisy-Chained Hubs  
Bridging  
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  
 
       
Chapter 3  
Installation  
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 “Hardware and Environmental  
Requirements” on page 1-6.  
Package Contents  
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  
206378-A  
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
2
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60-24T Hub  
60-12T Hub  
60-12T Hub  
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9
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rtition  
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/1  
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Partition  
9241EA  
Figure 3-1.  
Rack Mounted Hubs  
To mount hubs in a standard EIA 19” equipment rack:  
1. Gather the brackets and screws included in the package that shipped  
with your hub.  
2. Attach one bracket to each of the front sides of the hub using a cross-head  
screwdriver.  
3. Align the front bracket holes with corresponding holes in the rack.  
3-2  
206378-A  
 
         
Installation  
4. Insert the screws into the front of the bracket, through the rack, so that  
the screws extend past the rack.  
5. Tighten the screws.  
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  
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.  
Table 3-1 and Table 3-2 show which cable types and MDI/MDI-X modes to use  
for various devices when connecting from the BayStack 60-12T 10/100 Ethernet  
Hub or BayStack 60-24T 10/100 Ethernet Hub, respectively.  
Table 3-1.  
Hub Port  
Cables and MDI/MDI-X Modes for the BayStack 60-12T 10/100 Ethernet  
Hub  
Connecting Device  
Mode  
Cable Type  
1 through 12  
1 through 12  
1
PC, server  
MDI-X (normal)  
MDI-X (normal)  
MDI (uplink)  
Straight-through  
Crossover  
Hub, router, switch  
Hub, router, switch  
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  
1 through 24  
1
PC, server  
MDI-X (normal)  
MDI-X (normal)  
MDI (uplink)  
Straight-through  
Crossover  
Hub, router, switch  
Hub, router, switch  
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:  
1. Make sure the devices you want to connect to contain 10BASE-T or  
100BASE-T network interface cards.  
2. Obtain one straight through shielded or unshielded twisted pair cable  
(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. Connect one RJ-45 connector of the cable to the network interface card  
of your device.  
4. Connect the other RJ-45 connector of the cable to any available MDI-X,  
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.  
5. Be sure the tab on each RJ-45 connector clicks securely into position.  
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.  
3-4  
206378-A  
 
       
Installation  
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:  
1. Insert an RJ-45 connector of a straight-through twisted pair Ethernet  
cable into port 1 of your hub.  
You can configure port 1 to uplink or normal mode using the MDI/MDI-X  
button.  
2. Set the MDI/MDI-X button next to port 1 to MDI, or uplink.  
3. Insert the other RJ-45 connector in to any MDI-X port on another device.  
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  
To apply power to your hubs:  
1. Plug the power cord into the power socket in the rear of the hub.  
2. Plug the other end of the power cord into a standard power outlet.  
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.  
3. Check the Power LED on the front panel.  
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.  
206378-A  
3-5  
 
         
Installation and Reference for the BayStack 60-12T/60-24T 10/100 Ethernet Hubs  
Verifying Port Status  
You can check the status of each cable connection by viewing the port status  
indicators shown in Figure 3-2 and described in Table 3-3.  
1
2
5
7
9
1
1
13  
15  
17  
19  
21  
23  
60-24T Hub  
1
3
5
7
9
1
1
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15  
17  
19  
21  
23  
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/1 Link/Activity  
rtition  
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10  
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Collision  
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P
a
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16  
18  
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24  
60-12T Hub  
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Collision  
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Partition  
23  
60-24T Hu  
1
3
5
7
9
11  
13  
15  
17  
19  
21  
23  
10/100 Link/Activity  
Partition  
10/100 Link/Activity  
Partition  
1
4
6
8
10  
12  
14  
16  
18  
20  
22  
24  
24  
60-12T Hu  
12  
1
3
3
4
5
6
7
8
9
10  
11  
12  
10/100 Link/Activity  
Partition  
9247EA  
Figure 3-2.  
Port Status LEDs  
Table 3-3 describes the light and color indications of port status LEDs.  
Table 3-3.  
LED  
Port Status LED Descriptions  
State  
Indication  
Power  
On (green)  
The hub is receiving power.  
Collision  
Activity  
Flashing (yellow)  
Flashing (green)  
On (yellow)  
A packet collision occurred in the 10/100 Mb/s domain.  
The port is receiving 10/100 Mb/s traffic.  
Partition  
Link 10/100M  
The port has been partitioned from the network.  
On (green)  
The port has established a valid 100 Mb/s network connection.  
The port has established a valid 10 Mb/s network connection.  
On (yellow)  
3-6  
206378-A  
 
         
Chapter 4  
Troubleshooting  
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 valid 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.  
Follow these steps if the Link indicator fails to light when you connect a device to  
the hub:  
1. Verify that the twisted-pair cable is properly attached to the connected  
device and the hub.  
2. Verify that the media connector, or RJ-45 connector, snaps securely into  
place when attached.  
3. Verify that your cable is functioning properly. Try attaching the cable to  
another port on another attached device that appears to be functioning  
properly.  
4. Check the length of each twisted-pair cable.  
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.  
5. Verify that the attached workstation has a functioning adapter card.  
Try the card in another workstation that is successfully connecting to the  
network.  
206378-A  
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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 describes common problems and possible solutions.  
Table 4-1.  
Symptom  
LED Indicators  
Cause  
Solution  
The Link 10/100 Mb/s A network interface, such as  
indicator does not an adapter card on the  
light up after making a attached device, a network  
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.  
connection.  
cable, or the hub port is  
defective.  
The Power indicator  
does not light up  
(green) after powering defective.  
on.  
A power outlet, power cord, or  
internal power supply is  
Check the power outlet by plugging in another,  
properly functioning, device.  
Check the power cord by plugging it into  
another, properly functioning, device.  
If you still do not have power, contact Customer  
Support, as explained in “How to Get Help” on  
page xvi for assistance.  
The hub powers off  
after running for a  
time.  
Loose connections, or power  
surges or losses may have  
occurred.  
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.  
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.  
Item  
Product Specifications  
Description  
Standards Conformance  
Access Method  
IEEE 802.3 Ethernet, IEEE 802.3u Fast Ethernet  
CSMA/CD, 10 Mb/s, or 100 Mb/s  
Communication Rate  
Media Supported  
10/100 Mb/s on RJ-45 ports  
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  
Weight  
482.6 x 204 x 44 mm (19 x 8 x 1.72 inches)  
2.1 kg (4.6 lb)  
Input Power  
Full range power input:  
100 to 240 V AC  
50 to 60 Hz  
Power Consumption  
Heat Dissipation  
2.0 A max. @ 100-240 V AC  
92.1 BTU/hr max. @ 100-240 V AC  
0°C to 40°C (32°F to 104°F)  
Operating Temperature  
Operating Humidity  
80% maximum humidity, noncondensing  
206378-A  
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Installation and Reference for the BayStack 60-12T/60-24T 10/100 Ethernet Hubs  
Table A-1.  
Item  
Product Specifications (continued)  
Description  
Certification  
Emissions  
CE Mark  
FCC Class A,  
VCCI Class A,  
CISPR Class A,  
BCIQ, AZ/NZS Class A  
IEC 1000-4-2/3/4/6  
Immunity  
Safety  
CSA/NRTL, TUV/GS, NOM, UL  
Internal Switching Specifications  
Network Bridging Function  
Switching Method  
Filtering, forwarding, and learning  
Store-and-forward  
8K entries  
Address Table  
Queue Buffer  
512K bytes  
Filtering Rate  
Line speed  
Forwarding Rate  
Line speed  
A-2  
206378-A  
 
 
Appendix B  
Cable and Connector Information  
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  
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 shows the pin assignments in the RJ-45 connector.  
1
8
87654321  
Pin Assignments  
RJ-45 male  
connector  
9242EA  
Figure B-1.  
RJ-45 Pin Assignments  
206378-A  
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.  
Pin Number  
RJ-45 Pin Descriptions  
Assignment (Station Ports Assignment (Daisy-Chain Port,  
1 through 12 or 24)  
other Devices)  
1
Input Receive Data +  
Input Receive Data -  
Output Transmit Data +  
Output Transmit Data -  
Not used  
Output Transmit Data +  
Output Transmit Data -  
Input Receive Data +  
Input Receive Data -  
Not used  
2
3
6
4, 5, 7, 8  
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 shows schematics for straight-through and crossover twisted-pair  
cables.  
Straight-Through  
(Hub) (Adapter)  
Crossover  
(Hub)  
IRD+  
IRD-  
(Hub)  
IRD+  
1
2
IRD+  
IRD-  
1
2
3
6
OTD+  
OTD-  
IRD+  
IRD-  
1
2
1
2
3
6
IRD-  
3 OTD+  
OTD-  
3 OTD+  
6 OTD-  
OTD+  
OTD-  
9243EA  
6
Figure B-2.  
Cable Schematics  
B-2  
206378-A  
 
           
Index  
A
F
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  
BayStack 60-24T 10/100 Ethernet Hub, 1-3  
autopartitioning, 1-5  
I
autosense capability, overview, 1-2  
B
bridging, 2-4  
L
C
LEDs  
description, 1-4  
cable schematics, B-2  
port status descriptions, 3-6  
port status overview, 3-6  
M
compliance certifications, A-2  
MDI port, 3-5  
connections  
MDI/MDI-X button, 1-6  
power cord, 1-6, 3-5  
with an MDI port, 3-5  
modes  
MDI/MDI-X, 1-5  
normal, 1-5  
uplink, 1-6  
customer support, xvi  
D
N
daisy-chain connection, 2-4  
normal mode, 1-5  
E
environmental requirements, 1-6  
206378-A  
Index-1  
 
 
P
ports  
RJ-45, B-1  
uplink, 1-5  
power, applying to hub, 3-5  
product support, xvi  
R
RJ-45 ports  
connecting, 3-4  
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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