HP J3137A Installation and operating manual

Installation and
Reference Guide
HP J3137A
HP AdvanceStack 100VG Hub-7E

HP AdvanceStack 100VG Hub-7E
Installation and Reference Guide

©Copyright Hewlett-Packard Company 1996.
All Rights Reserved. Disclaimer
Reproduction, adaptation, or translation without
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The information contained in this document is
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HEWLETT-PACKARD COMPANY MAKES NO
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the use or reliability of its software on
equipment that is not furnished by
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Warranty
See the warranty statement and the registration
form included with the product.
A copy of the specific warranty terms applicable
to your Hewlett-Packard product and
replacement parts can be obtained from your
HP Sales and Service Office or authorized dealer.
Publication Number
J3137-90001
Edition 1
February 1996
Applicable Product
HP J3137A
Trademark Credits
MS-DOS®and Microsoft®are U.S. registered
trademarks of Microsoft Corporation.
Ethernet is a registered trademark of Xerox
Corporation.
Hewlett-Packard Companh
8000 Foothills Boulevard - Mailstop 5551
Roseville, California 95747-5551
http://www.hp.com/go/network_city

Contents
HP AdvanceStack 100VG Hub-7E . . . . . . . . . . . . . . . . . . . . 1
At A Glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Installation Summary . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1. Verify Included Parts . . . . . . . . . . . . . . . . . . . . . . . 2
2. Verify that the Hub Works . . . . . . . . . . . . . . . . . . . . . 3
3. Mount the Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
4. Complete Network Connections to the Hub . . . . . . . . . . . 6
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Customer Support Services . . . . . . . . . . . . . . . . . . . . . . . 13
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Safety and Regulatory Statements . . . . . . . . . . . . . . . . . . . 15
Recommended Cables . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Console connector and cable pin-outs . . . . . . . . . . . . . . . . . 20
Twisted-Pair Cable/Connector Pin-Outs . . . . . . . . . . . . . . . . 21
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
iii

HP AdvanceStack 100VG Hub-7E
At A Glance
The HP J3137A AdvanceStack 100VG Hub-7E is a high-speed multiport
repeater. With this hub, you can connect computers and other devices to-
gether in an unshielded twisted-pair cable network. This hub can be used to
upgrade your 10 Mbit/s Ethernet/IEEE 802.3 network that uses unshielded
twisted-pair cables to a 100 Mbit/s network.
Throughout this manual, this hub will be called the Hub-7E. The following
illustration shows the Hub-7E.
Features
Network Connections Six RJ-45 (twisted-pair) ports to connect to end nodes or other devices.
An Uplink port to cascade to another 100VG hub such as the following hubs:
HP J2413A AdvanceStack 100VG Hub-7M
HP J2410A AdvanceStack 100VG Hub-15
HP J2415A AdvanceStack 100VG Hub-14
Ethernet and Token Ring Support Support for both Ethernet and Token Ring framing. If you have 100VG LAN
adapters with 100VG Token Ring drivers, you can select the Token Ring position.
Remote Management An RS-232 port to connect an ASCII console for monitoring and troubleshooting
the hub and network.
Modular, Easy-to-Use Design LEDs showing power, activity, cascade, fault, and port status provide quick,
easy-to-read hub status information and troubleshooting assistance.
A small footprint that allows you to install the hub in a variety of ways, including
on a desk, under a desk, or on a wall.
Standards-Based Compatibility Compatible with the IEEE 802.12 standard.
Frame switch
Hub status LEDs Twisted-pair
ports
twisted-pair port LEDs
Uplink port for
hub to hub
connections
At A Glance
1

Installation Summary
The basic hardware installation procedure for the Hub-7E is as follows:
1. Verify included parts
2. Verify that the hub works
3. Mount the hub
4. Complete network connections to the hub
1. Verify Included Parts
Each Hub-7E has the following components shipped with it:
HP AdvanceStack 100VG Hub-7E Installation and Reference
Guide—this manual (J3133-90001)
An AC power cord, one of the following:
Australia/New Zealand (8120-1369)
Denmark (8120-2956)
Europe (8120-1689)
Japan (8120-4753)
Switzerland (8120-4753)
United Kingdom/Hong Kong (8120-1351)
U.S./Canada (8120-1378)
power supply (0950-3058)
serial cable (5182-4794)
HP 100VG AnyLAN Technology Guide
mounting hardware:
•two number 10 by half-inch pan head wood screws
•four 4-40 machine screws
•mounting bracket
Installation Summary
2

2. Verify that the Hub Works
Your hub uses power from an external DC power supply. To provide power
to the hub, follow these steps:
1. Plug the DC power supply into the hub’s Power connector.
Note If your installation requires a different power cord than the one supplied
with the hub, contact your HP-authorized LAN dealer or your local
HP sales office.
2. Plug the power cord into the power supply.
3. Plug the power cord into an AC power source. When installing the
Hub-7E, note that the AC outlet must be located near the equipment
and should be easily accessible.
Note The hub does not have a power switch; it is powered on when the power
cord is plugged in.
Power receptacle
on the back of the
hub.
DC Power cable from external
power supply
2. Verify that the Hub Works
3

4. Check the LEDs on the hub’s front panel.
When the hub is powered on, it performs a self-diagnostic test.
During the test, watch the LEDs on the front of the hub for the
following to occur:
At Power On All LEDs turn on.
During Self-Test Self-test requires about 3 seconds. While the hub is tested,
half of the LEDs are momentarily turned on and off. Then the
remaining LEDs are momentarily turned on and off.
After Self-Test All LEDs are off except:
Power LED is on,
Twisted-Pair ports reflect their normal operating state.
If the Fault LED stays on, the hub has failed its self-test. See page 7
for information about diagnosing your hub.
5. After the hub has passed its self-test, you are ready to mount the hub.
Before mounting the hub, unplug it.
3. Mount the Hub
The Hub-7E can be placed on a desk or mounted on any vertical or horizon-
tal surface, for example a wall or under a desk.
Equipment Required
To mount the hub on a wall or under a desk, you will need the mounting
hardware listed on page 2, and a Phillips screwdriver.
Mounting
Precautions Before mounting the hub, follow these mounting precautions:
Plan the hub’s location and orientation relative to other devices and
equipment. Also consider the cabling that will be attached to the hub
and ports that will be used. In the front of the hub, leave 3 inches
(7 cm) of space for twisted-pair cables. In the back of the hub, leave
3 inches (7 cm) of space for the AC power cord.
Ensure that the HP AdvanceStack hub(s) do not overload the power
circuits, wiring, and over-current protection. To determine the
possibility of overloading the supply circuits, add together the
amperage ratings from the nameplates of all your hubs (and other
equipment) installed on the same circuits and compare the total with
the rating limits for the supply circuits.
3. Mount the Hub
4

Do not install the HP AdvanceStack hub in an environment where
the operating ambient temperature might exceed 55°C (131°F).
Make sure the air flow around the sides of the hub is not restricted.
Mounting the Hub
Important A hub should be mounted only to a wall or wood surface that is at least
1/2-inch (12.7 mm) plywood or its equivalent.
The following illustration shows you how to mount the Hub-7E
under a table.
When you select the mounting location, make sure you allow enough room
to make the cable connections to the hub and to be able to access the cables
if they have to be moved.
When drilling into the table or other horizontal or vertical surface, you may
need to first pre-drill the surface with a 3/32-inch bit.
number 10 pan head
wood screw
table
number 10 pan head
wood screw
4-40 screws
mounting bracket
3. Mount the Hub
5

4. Complete Network Connections to the Hub
Reconnect the hub to the power source and then make the network
connections to the hub. With the hub mounted, you are now ready to
connect the hub to your network. Typical hub connections are:
Hub-to-device connections. Connecting to network devices such
as computers and printers.
Hub-to-hub connections. Connecting to another HP AdvanceStack
100VG Hub.
This section describes the different ways you can connect your hub to your
network.
Connecting Devices to the Hub
You can connect up to six devices to the downlink ports numbered 1 through
6 for each hub. To connect a device to the hub, push the RJ-45 plug into the
RJ-45 jack until the tab on the plug clicks into place.
If you have obtained 100VG Token Ring drivers for your 100VG LAN adapt-
ers in the network that the Hub-7E will be installed, move the switch to the
Token Ring position. You need to move the Frame Type switch before
connecting cables or training will fail.
If you have used all six downlink ports and need to add more users, see the
next page.
RJ-45 plug
Unbundled 4-pair unshielded twisted-pair
LAN cable
Maximum: 100 meters
to a computer, printer, or server
Installing the Hub
4. Complete Network Connections to the Hub
6

Connecting Additional Hubs (“Cascading”)
To add additional 100VG network ports, HP AdvanceStack 100VG hubs can
be “cascaded” together. To cascade HP 100VG hubs, connect a LAN down-
link port (ports 1 through 6) on the upper-level hub to the “Uplink” port on
the lower-level hub.
For a twisted-pair connection, use a standard four-pair unbundled
LAN port cable.
You can use any or all 100VG LAN downlink ports on the upper-level
hub to cascade to an uplink port on a 100VG lower-level hub. Down-
link ports on the Hub-7E are numbered 1 through 6.
Try to minimize the number of levels of cascaded hubs. We
recommend that you use no more than three levels of cascading (see
the 100VG AnyLAN Technology Guide for more information on
topology rules).
For more information on cable lengths, see the HP 100VG AnyLAN
Technology Guide.
In the following illustration, two hubs are connected together to add more
users to the existing 100VG network. This illustration also shows that an
example of two level cascading.
Upper-Level Hub
Uplink Port
Lower-Level Hub
Standard LAN Port (“Downlink”)
Unbundled 4-Pair LAN Cable
Maximum: 100 meters for Category 3
Level 1
Level 2
4. Complete Network Connections to the Hub
7

Troubleshooting
Most problem are caused by the following errors:
Incorrect position of the Frame Type switch. The Hub-7E is
Token Ring ready. The Hub-7E operates with 100VG LAN adapters
with 100VG Token Ring drivers running Token Ring frames. If you
do not have these drivers, keep the Frame Type switch in the Eth-
ernet position. Also note that the HP J2410A AdvanceStack 100VG
Hub-15 does not support Token Ring and cannot be connected to the
Hub-7E in Token Ring mode.
Wrong type of cable. Use only Category 3, 4, or 5 four-pair, un-
shielded twisted-pair cable rated at 100 ohms. If your cable contains
four twisted pairs and supports the IEEE 802.3 Type 10Base-T stand-
ards, it will generally work. You can verify the cable is compatible
with these standards by using the HP J3263A Cable Test Set. (The
older HP 28687A Wire Test Instrument can also be used.) HP also
offers a wire testing service. Contact your HP-authorized LAN
dealer or your local HP sales office for more information.
Bad cable. Try a different cable.
Bundled cable. Bundled cables are not supported. Use unbundled
cables only.
Exceeding the maximum allowable cable lengths. Use up to 100
meters between two nodes for Category 3 and 4 and use up to 200
meters for Category 5.
If the above problems do not exist, try the following:
Try resetting the hub by removing the power cord and re-inserting
the power cord. (Alternatively, you can reset the hub by using the
reset command in the ASCII console as described on page 11.)
Use the troubleshooting table on the next page to check the LEDs.
You may not have a valid topology. A common topology fault is
excessive cable length. If you have trouble after recent changes to a
network, switch back to the previous topology. If you no longer
have any trouble, the new topology is probably at fault. Refer to the
100VG AnyLAN Technology Guide included with this hub, for
topology and configuration guidelines.
Troubleshooting
8

Troubleshooting with the LEDs
If you have followed the above criteria, use the LEDs to troubleshoot your
hub:
LED patterns indicating problems Diagnostic Tips
Power Activity Cascade Fault LAN Port
Port Uplink Port
OFF * * * * * Verify that the AC power cord is plugged into an
active power source and to the hub. Make sure
these connections are snug. Try power cycling the
hub by unplugging and plugging the hub back in.
If the Power LED is still not on, verify the AC source
works by plugging another device into the outlet.
Or try plugging the hub into a different outlet. If this
condition persists, the hub, AC power supply, or
AC power cord has failed. Call your HP-authorized
LAN dealer or HP representative for assistance.
ON * * * OFF OFF Check cabling on the indicated port all the way out
to the device attached to that port. Faulty wiring or
a bad connection could exist somewhere in that
connection.
The end node or hub attached to the port is off.
ON * * ON * * The hub has failed its self-test. Power-cycle the
hub. If this condition persists, the hub has failed.
Call your HP-authorized LAN dealer or
HP representative for assistance.
ON * * * * OFF or
Flashing
when the
port is in
use
Check cabling on the indicated port.
Check the port status in the ASCII console to
determine whether:
- link training failed because of a
cabling or configuration error.
- the port on the upper hub was disabled.
- The Uplink cable was disconnected.
The Uplink port will flash if someone removes a
cable connected to this port. Reconnect the cable.
ON * * * Flashing * Link training has failed on the indicated port most
likely because of a faulty or improperly wired
cable. Check cabling on the port and check the
port status in the ASCII console.
* This LED is not important for diagnosis.
Troubleshooting
9

Diagnosing the Hub through the ASCII Console
The ASCII console provides tests and indicators that can be used to monitor
the hub and its network connections. For more details about these tests and
indicators.
Each hub contains a 9-pin serial (RS-232-C) port that is used to connect the
PC. The hub can be controlled from a PC running an ASCII terminal such as
the Windows Terminal program.
To connect a PC directly to the RS-232 port, proceed as follows:
1. Attach the console cable supplied with the hub to the RS-232 port on
the back of the hub.
2. Attach the other end of the serial cable to an available 9-pin serial
port on the personal computer.
If only a 25-pin serial port is available, use a 9-pin-to-25-pin port
adapter (not supplied).
PC running
Windows Terminal
Serial cable included with
the hub
Troubleshooting
10

3. Set the baud rate of your modem to 9600 or 19,200 bps. Press [Return]
several times at your terminal emulator program. The following
screen appears:
The console is easy to use; just type in one of the commands such as
reset, status, or help. (As a shortcut, you can enter only the first two
letters of the command, e.g., re for reset or st for status.) The status
command provides information to help you troubleshoot your net-
work. After you type status, the following information is displayed:
The counters can provide indications of unusual network activity.
The table on the next page explains the frame counters.
100VG 7 port hub
ROM Version A.01.00
HELP - Show this message.
RESET - Reset the hub.
RESET n - Reset port n. (n = 1-6, UPLINK, ALL, or COUNTERS)
STATUS - Show hub status.
=>status
Frame Count port 1 port 2 port 3 port 4 port 5 port 6 Uplink
Readable 0 0 0 0 0 0 0
Errored 0 0 0 0 0 0 0
IPM 0 0 0 0 0 0 0
Oversized 0 0 0 0 0 0 0
Broadcast 0 0 0 0 0 0 0
Multicast 0 0 0 0 0 0 0
Null addr 0 0 0 0 0 0 0
High Pri 0 0 0 0 0 0 0
Link Active No No No No No No No
In Training No No No No No No
Repeater No No No No No No
PromiscuousNo No No No No No
Address 000000- 000000- 000000- 000000- 000000- 000000-
000000 000000 00000 000000 000000 000000
Framing type: Ethernet
Time since reset: 0 days 0:06:45
Troubleshooting
11

Counter Definition
Readable The count of valid frames received by the port. A valid frame is defined as a data frame which is
not counted by any of the error counters.
Errored The count of frames received with any of the following errors: FCS, bad symbol, symbol balance,
undersize, or bad end-of-packet marker.
IPM The count of frames received with an invalid packet marker.
Oversized The total number of frames received that were larger than the maximum valid frame size for the
VG network frame type (Ethernet or Token Ring).
Broadcast Broadcast frames are frames that all devices in a network must receive.
Multicast Multicast frames are received by a group of devices.
Null Address Frames received by this port that have an address with all zeros. Such frames may be needed
during the 802.12 port training process to verify link operability.
High-Priority The count of high priority frames received on the port. The count includes both valid and invalid
high priority frames as well as high priority training frames, but does not include normal priority
frames that were priority promoted.
Link Active Specifies if the link has trained successfully.
In Training Specifies if this port has trained successfully. This counter does not apply to the Uplink port.
Repeater Specifies if this port is connected to a hub. This counter does not apply to the Uplink port.
Promiscuous Specifies if this port has trained in promiscuous mode. This counter does not apply to the Uplink
port.
Address Specifies the address of the connected device.
Troubleshooting
12

Customer Support Services
Hewlett-Packard offers a range of customer support services including the
World Wide Web, fax, and Network Phone-In Support.
World Wide Web
http://www.hp.com/go/network_city
Do you have questions about designing your expanding network? From this
web site, you can also download the Designing HP AdvanceStack
Workgroup Networks Guide which addresses capacity planning or dial
1-800-752-0900 to receive a copy by mail.
HP FIRST Fax Retrieval Service
HP FIRST is an automated fax retrieval service that is available 24 hours a
day, seven days a week. HP FIRST provides information on the following
topics:
Product information
Troubleshooting instructions
Technical reviews and articles
Configuration information
To access HP FIRST, dial one of the following phone numbers:
Location Phone Number
U.S. and Canada Only Dial 1 [phone] with
your fax machine or touch-
tone phone and press 1.
Outside the U.S. and
Canada Dial 1 [phone] from your fax machine and
press 9.
To receive a list of currently available documents, enter document number
19941. The information you requested will be sent to you by return fax.
HP Network Phone-In Support (NPS)
Call your HP Authorized Dealer or the nearest HP Sales and Support Office.
In addition, the HP Network Phone-In Support (NPS) service provides
expert technical assistance for U.S. customers through an NPS contract or at
an hourly rate (1-800-790-5544) Monday through Friday, 5 am to 6 pm, PST.
Customer Support Services
13

Specifications
Physical
Width: 21.6 cm (8.4 in) Height: 4.8 cm (1.9 in)
Depth: 19.0 cm (7.5 in) Weight: 1.4 kg (3.0 lb)
Electrical
AC voltage: 100–250 volts
Maximum current: 0.7 A max
Frequency range: 50/60 Hz
Environmental
Operating Non-Operating
Temperature: 0°C to 55°C
(32°F to 131°F) -40°C to 70°C (-40°F to 158°F)
Relative humidity:
(non-condensing) 15% to 95% at 40°C (104°F) 95% at 65°C (149°F)
Maximum altitude: 4.6 km (15,000 ft) 4.6 km (15,000 ft)
Connectors
The RJ-45 twisted-pair ports are compatible with the IEEE 802.12
100VG-AnyLAN standard.
The RS-232-C console port conforms to V.22 bis.
Safety
Complies with:
IEC 950: (1991)+A1,A2/.EN60950 I(1992)+A1,A2
UL1950
CSA 950
NOM-019-SCFI-1993
NOM-001-SCFI-1993
(Specifications continued on next page)
Specifications
14