HP J2415A Installation And Reference Manual

Installation and
Reference Guide

HP J2415A

HP AdvanceStack 100VG Hub-14

HP AdvanceStack 100VG Hub-14

Installation and Reference Guide

©

Copyright Hewlett-Packard Company 1996.

All Rights Reserved.

Warranty

Reproduction, adaptation, or translation without
prior written permission is prohibited, except as
allowed under the copyright laws.

Publication Number

J2415-90021
Edition 1
January 1996

Applicable Product

HP J2415A

Trademark Credits

MS-DOS® and Microsoft® are U.S. registered
trademarks of Microsoft Corporation.
Ethernet is a registered trademark of Xerox
Corporation.

The information contained in this document is
subject to change without notice.

HEWLETT-PACKARD COMPANY MAKES NO
WARRANTY OF ANY KIND WITH REGARD TO
THIS MATERIAL, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A
PARTICULAR PURPOSE. Hewlett-Packard shall
not be liable for errors contained herein or for
incidental or consequential damages in
connection with the furnishing, performance, or
use of this material.

Hewlett-Packard assumes no responsibility for
the use or reliability of its software on
equipment that is not furnished by Hewlett­Packard.

For warranty information, see the warranty
booklet 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.

8000 Foothills Boulevard MS 5551
Roseville, California 95747-5551
http://www.hp.com/go/network_city

HP AdvanceStack 100VG Hub-14

At A Glance

The HP J2415A AdvanceStack 100VG Hub-14 is a high-speed multiport
repeater. With this hub, you can connect computers and other devices
together on any 100VG IEEE 802.12 network. The hub can be used to
upgrade your 10 Mbit/second Ethernet/IEEE 802.3 network that uses
unshielded twisted-pair cables to a 100 Mbit/second network. Throughout
this manual, this hub will be called the Hub-14.

HP J2415A AdvanceStack 100VG Hub-14

iii

Front Panel

Hub Status

LEDs

Transceiver Slots for either:

Redundant Uplinks or

One Uplink, One Downlink

RS-232 Console Port

Distributed Management Chain

Extension Ports

LAN Port LEDs

12 RJ-45 LAN (Downlink) Ports

Cable Management

Bar

Back Panel

Power Connector

iv

100VG Hub Expansion Slot

Redundant Power
Supply Connector

Features

Network Connections

Distributed Management

Modular, Easy-to-Use Design

Twelve twisted-pair ports for 100VG network connections to 100VG devices
such as LAN adapters, switches, and hubs.

Two transceiver slots to cascade to another 100VG hub for redundant uplink
capability. Each slot can accept optional 100VG transceivers such as the:

HP J3028A 100VG Twisted-Pair Transceiver Module
HP J3027A 100VG Fiber-Optic Multimode ST Transceiver Module

(Other transceivers may now be available; contact your HP reseller for more
information.) These slots can be configured as two redundant uplink
connections or one uplink and one downlink port. With the second slot, you can
create a fiber-optic backbone by inserting a fiber module and making a
connection to another HP 100VG hub that has a fiber module.

An RS-232 port to connect a management control console for a single hub or a
chain of hubs. The Windows based HP Stack Manager software is supplied with
each hub. Use HP Stack Manager to configure, monitor, and diagnose the hub
or entire stack of hubs.

Extension ports (RJ-45) for “chaining” HP AdvanceStack hubs together to allow
centralized management of physically distributed hubs. You can chain up to 16
hubs together and manage all of them from one management station.

A 100VG Expansion Slot in the back of the hub for adding optional functionality
such as:

-SNMP and bridging capabilities between a 100VG LAN and a 10 Mbit/s
Ethernet/IEEE 802.3 LAN.

- SNMP and remote access server capability for users to dial in and dial out of
the LAN

- SNMP and router capability

Reliable Operation

Built-in Security

Standards-Based Compatibility

LEDs that provide quick, easy-to-read, hub status and troubleshooting
information.

A power supply that automatically adjusts to the voltage range of the AC power
being supplied to the hub (100-127 volts or 200-240 volts).

Easy-to-use mounting hardware that allows you to quickly mount the hub in any
EIA-standard 19-inch telco rack, on a wall, or on a table.

A self-test to check the operation of the hub.
Statistical counters for monitoring network activity and operation.
A power connector for the optional HP J2962A Redundant Power Supply (RPS).

With the rack-mountable RPS, your hub can receive redundant power for
increased reliability.

Per port security configurable with the included software (HP Stack Manager).
The hub is compatible with the IEEE 802.12 standard. With the optional

HP J2414B 100VG/ET SNMP/Bridge Module, this hub operates with the
Ethernet/IEEE 802.3 LANs.

v

HP Customer Support Services

Obtain the latest agent firmware (j2414b.exe, stkmgr.exe,
j2415a.exe) from:

HP FTP Library: ftp ftp-boi.external.hp.com
World Wide Web: http://www.hp.com/go/network_city
HP BBS [phone]
CompuServe go hpsys

lib 7
download j2414b.exe

How to get the latest software/agent firmware

You can download any of the following:

HP AdvanceStack SNMP firmware: j2414b.exe
HP Stack Manager stkmgr.exe
HP Hub-14 firmware j2415a.exe

from the HP BBS, HP FTP Library Service, CompuServe, and the World Wide
Web. After you download the file, extract the file by typing filename /x. For
example j2414b.exe /x

HP BBS

Set your modem to N-8-1, set speed up to 14400 bps, and with your
telecommunication program (e.g., Windows Terminal) dial [phone] to
get the latest software for your HP networking product.

HP FTP Library Service

1) FTP to Internet IP Address ftp ftp-boi.external.hp.com

2) Log in as anonymous and press [Return] at the password prompt.

3) Enter bin to set the transfer type.

4) Enter cd /pub/networking/software

5) Enter get

filename

to transfer the file to your computer and quit.

CompuServe

1) Login to CompuServe.

2) Enter go hpsys

3) Enter lib 7

4) Enter download

World Wide Web

http://www.hp.com/go/network_city
Select the “Support” section, then “Software Downloads and Patches”.

Download the file you need and extract it by typing:
Do you have questions about designing your expanding network? From this

web site, you can also download the Designing HP AdvanceStack Networks
Guide which addresses capacity planning, or dial 1-800-752-0900 to receive a
copy through the mail.

filename

and then quit.

✁

filename

/x

Contents

1 Installing the HP AdvanceStack Hub

HP 100VG Network Installation Checklist . . . . . . . . . . . . . . . 1-2

Hub-14 Installation Summary . . . . . . . . . . . . . . . . . . . . . 1-3

Included Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Optional Accessories . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

1. Install Optional Accessories . . . . . . . . . . . . . . . . . . . 1-5

2. Verify That the Hub Works . . . . . . . . . . . . . . . . . . . . . 1-6

3. Mount the Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Mounting a Hub in a Rack or Cabinet . . . . . . . . . . . . . . . 1-9

Mounting the Hub on a Wall . . . . . . . . . . . . . . . . . . . . 1-13

4. Complete the Hub Network Connections . . . . . . . . . . . . . 1-14

Connecting End Nodes . . . . . . . . . . . . . . . . . . . . . . . . 1-14

Connecting Additional Hubs (“Cascading”) . . . . . . . . . . . . 1-17

Connecting an Ethernet/IEEE 802.3 LAN . . . . . . . . . . . . . 1-19

Managing the Hub Cables . . . . . . . . . . . . . . . . . . . . . . 1-20

5. Connect a Management Console (Optional) . . . . . . . . . . . 1-21

Using a Direct Serial Connection . . . . . . . . . . . . . . . . . . 1-22

Using a Modem Connection . . . . . . . . . . . . . . . . . . . . . 1-23

Using a Data Switching Device . . . . . . . . . . . . . . . . . . . 1-25

2 Installing and Using HP Stack Manager

Software Description . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Computer Requirements . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Installing and Starting HP Stack Manager . . . . . . . . . . . . . . . 2-4

Using Windows . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Using Online Help . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

vii

Contents

HP Stack Manager Basic Features . . . . . . . . . . . . . . . . . . . 2-5

PC-to-Hub Communications Settings . . . . . . . . . . . . . . . 2-6

Automatic Chain Display . . . . . . . . . . . . . . . . . . . . . . 2-7

Hub Panel Graphic . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Redundant Uplink Connections . . . . . . . . . . . . . . . . . . . 2-7

LAN Traffic Statistics . . . . . . . . . . . . . . . . . . . . . . . . 2-8

100VG LAN Port Status . . . . . . . . . . . . . . . . . . . . . . . 2-8

100VG LAN Port Settings . . . . . . . . . . . . . . . . . . . . . . 2-8

Hub Identification . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Device Configuration . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Network Counters . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Security Features . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Intruder Log . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Hub Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

HP Stack Manager Advanced Features . . . . . . . . . . . . . . . . 2-16

3 Troubleshooting

LED Error Indications . . . . . . . . . . . . . . . . . . . . . . . 3-2

Troubleshooting Checklist . . . . . . . . . . . . . . . . . . . . . . . 3-4

Unusual Network Activity . . . . . . . . . . . . . . . . . . . . . . . 3-6

End-to-End Network Tests . . . . . . . . . . . . . . . . . . . . . . . 3-7

Customer Support Services . . . . . . . . . . . . . . . . . . . . . . . 3-8

Hewlett-Packard FTP Library Service . . . . . . . . . . . . . . . 3-9

CompuServe . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

HP FIRST Fax Retrieval Service . . . . . . . . . . . . . . . . . . . 3-11

HP Network Phone-In Support (NPS) . . . . . . . . . . . . . . . 3-11

Replacement Instructions . . . . . . . . . . . . . . . . . . . . . . 3-12

viii

4 Hub Reference

Hub Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Front of the Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2

Back of the Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

100VG-AnyLAN Technology . . . . . . . . . . . . . . . . . . . . . 4-7

Cascading Hubs . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

Hub Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

Out-of-Band Management . . . . . . . . . . . . . . . . . . . . . . 4-8

In-Band Management . . . . . . . . . . . . . . . . . . . . . . . . . 4-10

Security Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

Optional Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12

HP 100VG/ET SNMP/Bridge Module . . . . . . . . . . . . . . . . 4-12

HP Dial-A-LAN Bundles . . . . . . . . . . . . . . . . . . . . . . . 4-13

Contents

HP Router 210 Bundle . . . . . . . . . . . . . . . . . . . . . . . . 4-14

Firmware Enhancements . . . . . . . . . . . . . . . . . . . . . . . . 4-15

A Cables and Connectors

Recommended Cables . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Twisted-Pair Cable/Connector Pin-Outs . . . . . . . . . . . . . . . . A-4

Twisted-Pair Cable for 100VG LAN Ports . . . . . . . . . . . . . . A-4

Twisted-Pair Cable for the Distributed Management Chain . . . A-5

RS-232 Console Port Connector and Cable Pin-Outs . . . . . . . A-6

Pin-Out for Hub’s RS-232 Port Connector . . . . . . . . . . . . . A-6

RS-232-C “Null Modem”Cable (supplied with the hub)

(for PC with 9-Pin Male Connector) . . . . . . . . . . . . . . . . A-7

3-Wire Cable for Direct Console Connection . . . . . . . . . . . . A-7

RS-232-C Modem Cable . . . . . . . . . . . . . . . . . . . . . . . A-8

ix

Contents

B Specifications

Safety and Regulatory Statements

Index

x

1

HP 100VG Network Installation Checklist
Hub-14 Installation Summary

1. Install Optional Accessories

2. Verify That the Hub Works

3. Mount the Hub

4. Complete the Hub Network Connections

5. Connect a Management Console (Optional)

Installing the HP AdvanceStack Hub

Installing the

HP AdvanceStack Hub

Installing the HP AdvanceStack Hub

HP 100VG Network Installation Checklist

Use the following checklist to install, or upgrade to an HP 100VG network:

Verify that the cabling infrastructure meets 100VG network
specifications.

• If the existing cabling topology meets the IEEE 802.3 Type 10Base-T

(twisted-pair) cable specifications, then it will work for your 100VG
network.

• Be sure that all four pairs of your twisted-pair LAN port cables are

available for use by the 100VG network. (For more information on
cables, refer to the 100VG-AnyLAN Technology Guide, and to
appendix A, “Cables and Connectors”.)

Obtain the required 100VG network hardware components, for example:

• HP 100VG LAN Adapter card. A card is needed for each end node

on the 100VG network. Available HP 100VG LAN adapter cards
include:

– HP J2573A 10/100VG Selectable ISA LAN Adapter
– HP J2577A 10/100VG Selectable EISA LAN Adapter
– HP J2585A 10/100VG Selectable PCI LAN Adapter
– HP J2585B 10/100VG DeskDirect PCI LAN Adapter

1-2

• 100VG hub(s). The number of hubs needed depends on the number

of HP 100VG end nodes to be networked and the number of ports per
hub. (For example, the HP AdvanceStack 100VG Hub-14 provides 12
twisted-pair ports.)

• Optional modules for your HP AdvanceStack 100VG hub.

Optional modules provide additional functionality and features (such
as bridging capabilities between a 100VG LAN and a 10 Mbit/s
Ethernet/IEEE 802.3 LAN).

Install your HP 100VG network hardware using the installation
instructions supplied with the hardware. (To install the
HP AdvanceStack 100VG Hub-14 and optional accessories, continue with
chapter 1 of this guide.)

Connect all network cabling.

Verify that the network operates properly using any available network
test or application that allows you to test the communications between
end nodes or devices.

Installing the

HP AdvanceStack Hub

Installing the HP AdvanceStack Hub

Hub-14 Installation Summary

The remainder of this chapter describes the installation procedures for the
Hub-14. A summary of the procedures is provided below:

1. If required, install any optional accessories.

2. Verify that the hub works correctly.

3. Mount the hub in a rack, on a wall, or on a tabletop.

4. Connect the hub to the network. This includes:

• LAN downlink port connections to network end nodes, such as

computers or other supported devices

• Cascade connections to other 100VG hubs

• Connections to other networks, such as a 10 Mbit/s Ethernet/IEEE

802.3 network (requires an HP 100VG SNMP/Bridge Module)

5. If appropriate, connect a management console (Windows-based PC) to

the hub or chain of hubs (only one hub in a chain needs to have a console
connected). Run HP Stack Manager or HP Interconnect Manager on the
management console to configure and manage the hub (refer to chapter
2, “Installing and Using HP Stack Manager,” for more information).

1-3

Installing the

HP AdvanceStack Hub

Installing the HP AdvanceStack Hub

Included Parts

HP Stack Manager Software Kit
Serial cable for attaching a management console PC to the Distributed

Management port (5182-4794)

Mounting Kit (5063-4251):

– two mounting brackets
– two cable ties
– four 3/8-inch M4 machine screws
– four 5/8-inch number 12-24 screws

Power Cord (one of the following):

– Australia (8120-1369)
– Denmark (8120-2956)
– Europe (8120-1689)
– Japan (8120-4753)
– Switzerland (8120-2104)
– United Kingdom (8120-1351)
– United States/Canada (8120-1378)

This manual

HP 100VG AnyLAN Technology Guide

Warranty booklet

Optional Accessories

Optional accessories for the Hub-14 include the following items (consult
your HP-authorized dealer for the most recent list of available accessories):

100VG Expansion Slot modules:

• SNMP and 10Base-T Bridging: HP J2414B 100VG/ET

SNMP/Bridge Module. Provides a bridge for connecting a 10 Mbit/s
Ethernet/IEEE 802.3 LAN to your 100VG LAN in your Hub-14.

• Router: HP J3159A AdvanceStack Router 210 Bundle. Provides both

SNMP and routing capabilities for your network.

• Remote Access Servers: HP J3157A AdvanceStack Dial-A-LAN

2A/Plus Bundle and HP J3158A AdvanceStack Dial-A-LAN 4A Bundle.
These remote access servers serve remote PCs, Macintoshes, and
UNIX workstations by allowing users to dial in or dial out of the hub.

1-4

Installing the

HP AdvanceStack Hub

Installing the HP AdvanceStack Hub

Transceiver Slots: The two slots in the front of the hub accept the

following transceivers:

• HP J3027A 100VG Fiber-Optic Multimode ST Transceiver Module

• HP J3030A 100VG Twisted-Pair Transceiver Module

1. Install Optional Accessories

You will typically install optional modules (as described on the previous
page) into the hub before mounting the hub in a rack or other location,
especially if access to the hub’s accessory slots will be impaired.

To install any of these optional accessories, refer to the documentation
supplied with the accessory products. Never try to separate the two boards
that are connected together to form the HP 100VG SNMP/Bridge Module. If
you want remote access server or router capability, you need to order those
capabilities as separate products and install them into another 100VG hub.
Contact your HP-authorized dealer or reseller for information.

Warning Before installing a module into the 100VG expansion slot, unplug

the hub. Electrical shock or other injury can result if you
attempt to install the module without unplugging the hub.

If you do not install an optional module, verify that the cover
plates are covering the 100VG Expansion Slot and the two
transceiver slots on the front of the hub. Cover plates are required

not only for safety, but also to ensure proper hub cooling.

HP J2414B 100VG/ET SNMP/Bridge Module

1-5

Installing the HP AdvanceStack Hub

2. Verify That the Hub Works

Before mounting the hub, verify that the hub operates correctly by following
these three steps:

Installing the

HP AdvanceStack Hub

Caution If your installation requires a different power cord than the one

Note The hub does not have a power switch; it is powered on when the power

1. Plug the power cord into the hub’s power cord receptacle and into

an AC power source.

power receptacle
on the back of the

hub

supplied with the hub, be sure to use a power cord displaying the
mark of the safety agency that defines the regulations for power
cords in your country. The mark is your assurance that the power
cord can be used safely with the hub.

cord is plugged in. The hub’s power supply automatically adjusts to any AC
power source between 100-127 volts and 200-240 volts. There are no voltage
range settings to configure.

1-6

Installing the

HP AdvanceStack Hub

Installing the HP AdvanceStack Hub

2. Check the LEDs on the hub’s front panel.

When the hub is powered on, it performs a diagnostic self-test. Observe
the front panel LEDs during the self-test to verify that the hub is
operating properly. As shown below, the LED indications will differ
depending on the optional accessory modules installed.

• Hub without any optional modules installed:

At Power On All LEDs turn on.

During Self-Test

After Self-Test All LEDs are off except:

Self-test requires about 3 seconds. All LEDs are on.
After the hub is tested, half of the LEDs are momentarily
turned on and off. Then the remaining LEDs are momentarily
turned on and off.

Power

LED is on,

RPS LED is

on if a Redundant Power Supply is connected.

• Hub with a module installed into the 100VG Expansion Slot:

At Power On All LEDs turn on.

During Self-Test

After Self-Test

The hub and module self-tests require about 20 seconds
total. After the hub is tested, half of the LEDs are
momentarily turned on and off. Then the remaining LEDs are
momentarily turned on and off.

During the module self-test, all LEDs are on except:

Exp Slot

All LEDs are off except:

Power
Exp Slot
RPS LED
10 Mbit/s Port

flashing. This LED flashes if a transceiver is installed but not
connected or not terminated. *

LED blinks during module self-test.

LED is on,

LED is on,

is on if a Redundant Power Supply is connected

LED on the SNMP module may be on, off, or

If the LEDs do not provide the proper indications, refer to chapter 3,
“Troubleshooting”.

3. Turn off the hub by unplugging the power cord.

The state of the module LEDs depends on the particular

*

module installed.

1-7

Installing the

Installing the HP AdvanceStack Hub

3. Mount the Hub

The Hub-14 can be mounted in three ways:

in a rack or cabinet
on a wall
on a table

HP AdvanceStack Hub

Mounting
Precautions:

The hardware for mounting the hub is included in the hub mounting kit
(5063-4251) packed with the hub. If you are mounting the hub to a wall,
however, you will also need four 5/8-inch number 12 wood screws, which are
not included in the mounting kit.

To mount a hub in a rack or on a wall, you will need a Phillips (cross-head)
number 1 screwdriver.

To install the hub on a table or other horizontal surface, no special tools are
necessary. Be certain to pick a sturdy table in an isolated area. You may want
to secure the hub’s cables to the leg of the table to prevent people from
tripping over them.

Before mounting a hub, plan its location and orientation relative to other
devices and equipment. Also consider the cabling that will be attached to
the hub and the ports that will be used. If you will be using the cable
management bar, verify that there is room for the grouped cables to trail
out from the side of the hub.
of the hub. In the back of the hub, allow at least 1 1/2 inches (3.8 cm) of
space for the 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.

Allow at least 3 inches (7.6 cm) in the front

Make sure that the power source circuits are properly grounded, then use
the supplied power cord to connect the HP AdvanceStack hub to the
circuit. See the Safety Statements at the end of this manual.

Do not install the Hub-14 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.

1-8

Installing the

HP AdvanceStack Hub

Installing the HP AdvanceStack Hub

Mounting a Hub in a Rack or Cabinet

The Hub-14 is designed to be mounted in any EIA-standard 19-inch telco
equipment rack.

Warning The rack or cabinet should be adequately secured to prevent it

from becoming unstable and/or falling over.

1. Using a Phillips (cross-head) screwdriver, attach the mounting brackets

to the hub with the 10-mm M4 screws included in the Accessory Kit. The
top of each bracket should align with the top of the hub. Be careful not
to overtighten the screws.

Align top of bracket
with top of hub

10-mm M4
screws

Note that several different rack mount positions are possible by using the
different holes in the bracket and the hub. The illustration shows the
recommended position for rack mounting to provide the best weight
distribution for the hub.

1-9

Installing the HP AdvanceStack Hub

Important
Note

Installing the

HP AdvanceStack Hub

Steps 2 through 4 below apply to mounting a single hub or the first of
multiple hubs that will be stacked in a rack. The mounting brackets are
designed to make it easy to install this first hub—if it is installed correctly,
the installation of subsequent hubs is simplified. To make the process

easy, it is important to get the first hub located correctly. This is
done by selecting the correct holes in the rack’s uprights.

This first hub (or single hub) should be mounted in a position toward the
bottom of the rack for stability and to make it easier to stack the other hubs
on top.

2. As shown below, partially install a screw (5/8-inch number 12-24) in each

rack upright. Ensure that the screws in each upright are at the same
level.

If you are stacking multiple hubs in a single rack and want them to fit
tightly, the selection of the first screw holes is important. In an
EIA-standard 19-inch telco rack, the screw hole pattern is
repetitive—pairs of holes are separated by 0.5-inch or 0.625-inch. Insert
these first screws in the upper hole of a close (0.5-inch) pair, as shown in
the illustration.

Insert a screw into the top hole
of a close (0.5-inch) pair—like
one of these—one in each of
the rack uprights.

One upright of an EIA
19-inch telco rack

1-10

3. Place the hub in the rack and lower it so the notches in the bottom of the

Installing the

HP AdvanceStack Hub

bracket slide onto the screws. Tighten these screws—be careful not to
overtighten.

Upper hole in the bracket

Lower notch in the bracket

4. Install the other two number 12-24 screws into the upper hole in each

bracket. Tighten these screws—be careful not to overtighten.

Installing the HP AdvanceStack Hub

Install additional screw

1-11

Installing the HP AdvanceStack Hub

Notice that for the first hub you mounted, you used the bottom notch and
the top hole in the bracket. For the next hub above, you use the bottom hole
and the top notch, as shown in the illustration below. Continue to alternate

“notch and hole, hole and notch” for all hubs to be installed.

Installing the

HP AdvanceStack Hub

1-12

Installing the

HP AdvanceStack Hub

Installing the HP AdvanceStack Hub

Mounting the Hub on a Wall

Important A hub should be mounted only to a wall or wood surface that is at

least 1/2-inch plywood or its equivalent.

1. Using a Phillips (cross-head) screwdriver, attach the mounting brackets

to the hub in one of the positions shown in the illustrations below. Use
the 10-mm M4 screws included in the accessory kit.

2. Attach the hub to the wall or wood surface with 5/8-inch number 12

wood screws (not included).

10-mm M4 screws

Bracket mounting position for flat
mounting on a wall.

10-mm M4 screws

Bracket mounting position for
bookshelf-style mounting on a wall.

Plug the power cord into the hub’s
power receptacle before mounting the
hub. There may not be enough room to
do so after the hub is mounted.

1-13

Installing the HP AdvanceStack Hub

4. Complete the Hub Network Connections

Reconnect the hub to the power source and then make the network
connections to the hub.

Installing the

HP AdvanceStack Hub

Making network connections consists of the following procedures:

connecting to network end nodes, such as personal computers

connecting to another 100VG hub (“cascading”)
connecting to a Ethernet/IEEE 802.3 (10 Mbit/s) network (optional)
managing your cables

Connecting End Nodes

End node connections on the Hub-14 consists of ports numbered 1 through
12B. For the RJ-45 ports, the cable used to connect to each LAN port must
contain four twisted-pairs (8 wires total) and must be wired “straight
through”. Refer to appendix A for wiring diagrams.

To connect to a LAN port, push the RJ-45 plug on the cable into the RJ-45

jack until the tab on the plug clicks into place.

To disconnect an RJ-45 plug, press the small tab on the plug and pull the

plug out of the RJ-45 jack.

Note If you have purchased an optional transceiver and installed it into port 12B

to be used as a downlink port, downlink port 12A is not available for a cable
connection; cables connected to this port will not transfer any data.

1-14

RJ-45 plug

unshielded twisted-pair cable

Installing the HP AdvanceStack Hub

Note A 100VG LAN complies with the IEEE 802.12 standard and supports

category 3, 4, and 5 four-pair, 100 ohm UTP (unshielded twisted-pair) cables.
Category 3 UTP cable is standard, voice-grade, telephone cable. For more
detailed information on supported LAN cables, refer to the included 100VG
AnyLAN Technology Guide and appendix A.

If you presently have a twisted-pair cable network that complies with
Ethernet/IEEE 802.3 Type 10Base-T specifications, generally you can use the
same cables on your 100VG network. Note, though that the 100VG network
technology uses all 4 pairs of the UTP cable, while 10Base-T uses only 2
pairs. Make sure that all 4 pairs are wired correctly. See the included
100VG AnyLAN Technology Guide and appendix A.

To connect end nodes, you can use unbundled or bundled cables. An

“unbundled cable” refers to one that contains only four twisted pairs and is
used to connect a single end node or device. A “bundled cable” refers to a
cable that contains 25 or more twisted-pairs in one sheath and is used to
provide a convenient method of connecting multiple end nodes.

HP AdvanceStack Hub

Installing the

End nodes connected
through a bundled cable
using cross-connect
blocks

End nodes connected directly to the
hub LAN ports using unbundled LAN
cables.

bundled cable

1-15

Installing the

Installing the HP AdvanceStack Hub

Using Unbundled (4-pair only) Cables

You can used unbundled cables to connect to devices that operate in either
private mode or promiscuous mode. A private mode device (such as a
typical end node) receives only those packets intended for it. A
promiscuous mode device (such as a LAN analyzer or cascaded hub)
receives all packets. A hub port that detects a promiscuous device assumes
that an unbundled cable is being used.

HP AdvanceStack Hub

Caution Some special wiring concerns exist with promiscuous devices such as a

Using Bundled (25-pair) Cable

If you are presently using bundled twisted-pair cable (25 or more
twisted-pairs) from a cross-connect block, wiring closet, or other
intermediary connection, you will need to attach RJ-45 connectors to the
appropriate sets of 4-pair wires in the cable for connection to the HP 100VG
hub. For the LAN port RJ-45 connector pinouts and wiring diagrams, refer
to appendix A.

cascaded hub, a switch, or a LAN analyzer.
When connecting any promiscuous device with bundled cable, you should

select the “Some Bundled” hub cabling feature in HP Stack Manager. This is
to prevent signal interference (crosstalk), which can result in unreliable
network operation.

If no promiscuous devices are connected with bundled cables, selecting
“None Bundled” will provide the best performance. Note that the cable must
be unbundled through the entire path—from the hub to the device.

If you have a promiscuous device and select “none bundled”, the use of
a bundled cable with a promiscuous device will cause signal interference.

Individual wire pairs may exhibit significant near-end crosstalk which can
interfere with network operation. Verification of your cable system may be
necessary if a port does not train properly.

Because each LAN port uses four pairs, a bundled cable containing 25
twisted pairs can connect up to six 100VG LAN ports. Select “Some
Bundled” in HP Stack Manager for a port using bundled cable.

1-16

Installing the HP AdvanceStack Hub

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
downlink port on the upper-level hub to the “Uplink A” port on the
lower-level hub. You can either use one cable or you can add a second cable
to act as a redundant link. For a one or two cable setup, follow these rules:

The type of cable you select depends on the optional transceiver you
install in the upper-level hub. For a twisted-pair connection, use a
standard four-pair LAN port cable. For a fiber connection, see the quick
reference card that is shipped with the hub.

Caution. When connecting a promiscuous end node or cascaded hub,
use an “unbundled” cable. Use of a bundled cable with a promiscuous
device (such as a cascaded hub) will cause signal interference and result
in unreliable operation.

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.

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).

HP AdvanceStack Hub

Installing the

Upper-Level Hub

Unbundled 4-Pair LAN Cable

Lower-Level Hub

Do not exceed the cable lengths specified for your LAN cable (typically
up to 100 meters for category 3 UTP cables). For more information on
cable lengths, see the HP 100VG AnyLAN Technology Guide.

Cascading Hubs With One Link

Level 1

Standard LAN Port (“Downlink”)

Level 2

Uplink A

1-17

Installing the HP AdvanceStack Hub

Cascading Hubs using Redundancy

You can building redundancy into your cascading hubs by connecting a
second cable from the lower-level hub to the upper-level hub. The following
illustration shows how to add the second cable:

Installing the

Upper-Level Hub

HP AdvanceStack Hub

Unbundled 4-Pair LAN Cable

Lower-Level Hub

Follow these steps to set up a redundant connection:

1. Connect the second cable following the bundling and cabling
specifications on the previous page.

2. Enable Redundant Links by using either:

• the included HP Stack Manager (described in chapter 2),

• the optional HP Interconnect Manager programs,

• the ASCII console (if you have installed an HP J2414B 100VG/ET

SNMP/Bridge Module)

If your backup link is ever interrupted, the downlink LED will blink slowly
on the upper-level hub. When using the above software programs, turn off
Redundant Links and then turn Redundant Links back on. The blinking LED
should stop blinking.

1-18

Installing the

HP AdvanceStack Hub

Installing the HP AdvanceStack Hub

Connecting an Ethernet/IEEE 802.3 LAN

A Hub-14 can be connected to an Ethernet or IEEE 802.3 10 Mbit/s network.
To connect to an Ethernet/IEEE 802.3 LAN, the hub must contain the
following accessory products:

HP J2414B 100VG/ET SNMP/Bridge Module installed in the 100VG

Expansion Slot in the back of the hub, and

One of the following Ethernet/IEEE 802.3 Transceiver modules installed

in the “AUI/Xcvr Slot” on the module:

• HP J2606A Fiber-Optic Transceiver for 10Base-FL

• HP J2607A Twisted-Pair Transceiver for 10Base-T

• HP J2608A ThinLAN Transceiver for 10Base2

• HP J2609A AUI Port for external transceivers

Refer to the installation instructions supplied with these products for
installation and network connection instructions.

The HP J2414B SNMP/Bridge Module installed in the hub’s expansion slot
provides the bridge functionality between the 100 Mbit/s and 10 Mbit/s
networks.

The transceiver module provides the physical interface its respective
Ethernet/IEEE 802.3 network medium.

1-19

cable management bar

Installing the

HP AdvanceStack Hub

Installing the HP AdvanceStack Hub

Managing the Hub Cables

The HP AdvanceStack hubs have been designed to help you manage your
network cables. On the right side of each hub is a built-in cable management
bar.

The bars have slots in them that you can use for tie-wrapping the network
cables.

Additionally, included in the hub’s accessory kit are some specialized
tie-wraps that allow you to wrap the cables and then attach the bundle to the
cable management bar, as shown in the illustration below.

specialized tie-wrap

In some instances, all the cables will not fit inside the post on the cable
management bar. The specialized tie-wrap can be used to bundle the extra
cables and hang them on the outside of the post.

1-20

Installing the

HP AdvanceStack Hub

Installing the HP AdvanceStack Hub

5. Connect a Management Console

(Optional)

HP AdvanceStack 100VG hubs can be configured and managed through an
out-of-band connection to a Windows-based PC that is running HP Stack
Manager software. The HP Stack Manager software is supplied with each
hub and is described in chapter 2, “Installing and Using HP Stack Manager”.

When running HP Stack Manager, the PC serves as a management console
for configuring and managing a single HP AdvanceStack hub, or multiple
hubs connected on a Distributed Management Chain (up to 16 hubs).

Note For a Distributed Management Chain that connects both HP AdvanceStack

10Base-T and 100VG hubs, the features accessible by HP Stack Manager are
hub dependent. For HP Stack Manager features that apply to a particular
hub, refer to the installation and reference manual for that hub. For
example, refer to chapter 2 of this manual for HP Stack Manager features
that apply to the Hub-14.

There are several ways that the PC (running HP Stack Manager) can access
an HP AdvanceStack 100VG hub:

through a direct serial port connection
through a modem connection
through a data switching device

1-21

Installing the HP AdvanceStack Hub

Using a Direct Serial Connection

Each hub contains a 9-pin serial (RS-232-C) port that is used to connect the
management console PC. When connected, the PC (running HP Stack
Manager) can access the hub directly, or can access other hubs through the
Distributed Management Chain. The “chained” connections are
independent of any network connections between hubs.

Installing the

To connect a PC directly to the RS-232 port, proceed as follows:

HP AdvanceStack Hub

1. Attach the console cable supplied with the hub to the RS-232 port on the
front of the hub. 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).

Serial cable (5182-4794) for
connecting a PC to the
console port

Distributed Management
Chain cables: standard
4-pair, unshielded
twisted-pair cable

The chain can extend up to
185 meters, end-to-end, and
can include up to 16 hubs.

The RS-232 console port is
connected to one of the hubs in the
chain.

When you run HP Stack Manager,
all hubs in the chain are
automatically discovered and
displayed. You can then use
HP Stack Manager to configure,
monitor, and diagnose any
HP AdvanceStack hub (100VG or
10Base-T) in the chain.

2. Define the RS-232 port’s data communication settings using the
“Communications” function in the “Settings” menu of HP Stack Manager.

3. From the main screen click on [Connect] to establish the communications
with the hub (or chain of hubs). Once the connection is established, the
hub (or chain of hubs) will be displayed on the HP Stack Manager’s main
screen.

1-22

Installing the HP AdvanceStack Hub

Using a Modem Connection

You will need two modems, one connected to the hub (the “remote” modem)
and the other to the PC (the “local” modem). Full modem support requires

an HP J2414B 100VG/ET SNMP/Bridge Module installed in the hub.

The modems that have been tested for use with the HP AdvanceStack hubs
are listed in the modem configuration screens in HP Stack Manager. You just
have to select the modem you are using from the list and HP Stack Manager
automatically provides the correct initialization string.

Use the following illustration to set up your modem connection:

RJ-11 telephone cable

“straight-through”

modem cable

HP AdvanceStack Hub

Installing the

Hub-14

External

“remote” modem

“straight-through”

modem cable

RJ-11 telephone cable

External “local” modem (You
can also use an internal
modem.)

PC running Stack Manager

Note To connect the Distributed Management serial port to a modem,

it is necessary to use a “straight-through” modem cable (not
included). The null modem cable (supplied with the hub) can be
used only for direct connection to a PC.

1-23

Installing the HP AdvanceStack Hub

After you have connected the hardware together, you need to set up
HP Stack Manager. The basic steps to connect the hub to HP Stack Manager
with a modem link are:

1. Connect the “remote” modem that will be used on the hub to your PC’s
serial port.

Installing the

HP AdvanceStack Hub

2. Configure the “remote” modem by using the Remote Modem
initialization screen from the Settings menu in HP Stack Manager. This
configures the remote modem for correct operation with HP Stack
Manager.

3. Connect the “remote” modem to the RS-232 port on the back of the hub
using a standard “straight-through” modem cable. (For pinouts and
recommended cables, see appendix A, “Cables and Connectors”.) The

cable included with the hub will not work for connecting a modem
to the hub.

4. Connect the “local” modem to the serial port on your PC or install it in
the PC if it is an internal modem.

5. Configure the “local” modem by using the “Local Modem” initialization
screen in HP Stack Manager.

6. From the Communications screen under the Settings menu, click on
the Modem button.

7. Set the Baud Rate and enter the phone number of the remote modem.

8. From the main screen click on the [Connect] button to establish the
communication connection between the two modems. Once the
connection is established, the hub or stack of hubs will be displayed on
the HP Stack Manager’s main screen.

See the HP Stack Manager online help for more specific instructions.

1-24

Installing the

HP AdvanceStack Hub

Installing the HP AdvanceStack Hub

Using a Data Switching Device

In some installations, the management console PC may access the hub
through a data switching device (such as a Data Switch, Data Terminal, PBX
switch, or X.25 PAD). The hub will be connected directly to one port of the
data switch, while the management console may be connected directly or
through a modem link to another port of the data switch.

HP Stack Manager provides a simple terminal capability that allows
command strings to be sent to the data switch for configuration. To access
this feature, proceed as follows:

1. Use the “Communications” screen under the “Settings” pull-down menu
to set up either your direct or modem link communication settings. (If
you need to configure modems, refer to “Using a Modem Connection”
described previously.)

2. Select the “Add Terminal Support” under the “Settings” pull-down menu.
This will add several new buttons to the HP Stack Manager main screen
that allow you to connect and logon to the hub, [Open Terminal] and
[Close Terminal].

When needed, pressing [Open Terminal] will provide a simple terminal
capability for sending text strings to the data switching device.

See the HP Stack Manager online help for button definitions and more
specific instructions.

1-25

2

Software Description
Computer Requirements
Installing and Starting HP Stack Manager
HP Stack Manager Basic Features
HP Stack Manager Advanced Features

Installing and Using HP Stack Manager

Installing and Using HP Stack Manager

This chapter describes how to install and use the HP Stack Manager
software and lists the program’s basic and extended features.

Software Description

HP Stack Manager is a software application that serves as the console
interface for the hub. It enables you to configure, monitor, and diagnose your
hub.

HP Stack Manager runs on a Windows-based PC that is connected to a hub
through a direct serial link or a remote modem link. If multiple hubs are
connected on a Distributed Management Chain (using the Extension ports
on each hub), HP Stack Manager can configure and manage any hub on the
chain through a single serial or modem link. For information on PC-to-hub
connections, refer to chapter 1.

HP Stack Manager

Note HP Stack Manager provides basic management functions for all

HP AdvanceStack hubs, both 100VG and 10Base-T. In addition, when the
hubs are equipped with the appropriate modules, HP Stack Manager can
provide extended features depending on the type of hub and the module
installed. For a description of the extended features available with the
Hub-14, refer to “HP Stack Manager Advanced Features” later in this chapter.

2-2

HP Stack Manager

Installing and Using HP Stack Manager

Computer Requirements

The HP Stack Manager software runs on IBM-compatible personal
computers with the following minimum configuration:

Microsoft Windows version 3.1 (or later) and systems that support

Windows 3.1 applications

80386 (or higher) processor
4 Mbytes of RAM
3 Mbytes of available hard disk space
a 3-1/2 inch 1.44 Mbyte floppy disk drive
an available RS-232 (serial) port or internal modem
a VGA monitor

You will also need the following equipment to connect the PC to the hub:

For a direct connection:

• a serial cable (included with hub) to connect a Windows-based PC

directly to the hub

For a remote connection:

• two modems

• standard modem cables for PC-to-modem and modem-to-hub (or

modem-to-switching device) connections. The serial cable
included with the hub will not work as a modem cable.

For chaining multiple hubs together on a Distributed Management Chain:

• Unshielded twisted-pair cables with RJ-45 connectors (standard LAN

cables may be used).

Note See appendix A, “Cables and Connectors” for details on appropriate cables.

For information on connecting the PC (or modem) to the hub, refer to
chapter 1.

2-3

Installing and Using HP Stack Manager

Installing and Starting HP Stack Manager

To install the HP Stack Manager software, follow the directions on the disk
and the prompts on the screen.

Using Windows

The HP Stack Manager software uses the standard features of the Microsoft
Windows user interface. If you are unfamiliar with using Windows, consult
your Windows documentation for more details on using a mouse, menus,
icons, buttons, online help, and other Windows features.

Using Online Help

HP Stack Manager

Specific information about the HP Stack Manager software is included in the
online help that accompanies the software. For step-by-step instructions on
how to use the HP Stack Manager, refer to the online help system.

To access the HP Stack Manager online help, either select Help from the
menu bar, or click the help button ([Help] or [?]) on each of the screens where
help is available.

2-4

HP Stack Manager

Installing and Using HP Stack Manager

HP Stack Manager Basic Features

This section describes the general capabilities of HP Stack Manager for the
Hub-14. For specific procedures on using various Stack Manager functions,
refer to the online help system.

The basic HP Stack Manager features available for each Hub-14 include:

PC-to-hub communications settings
Automatic chain display
Hub front panel graphic display
Redundant uplink feature for configuration and status
LAN traffic statistics
100VG LAN port status
100VG LAN port settings
Hub identification
Counters
Device configuration
Security
Intruder log
Hub reset

A description of each basic feature follows.

Note When using HP Stack Manager, menu items or functions that are not

available for your hub will not be selectable—either they will not be
displayed, or they will be displayed in light gray. For a description of
extended hub management features for HP AdvanceStack 100VG hubs, refer
to “HP Stack Manager Advanced Features” later in this chapter.

2-5

HP Stack Manager

Installing and Using HP Stack Manager

PC-to-Hub Communications Settings

Use the Settings pull-down menu to configure the PC-to-hub
communications settings.

Direct Serial Communications

You can configure the PC-to-hub serial communication parameters by
selecting Communications... in the Settings menu.

The communications settings can be stored in an individual file for each
serial connection. See the HP Stack Manager online help for more
information.

Configuring Modems

If you are using a modem link, you can also set up the modems through the
Settings menu. Select Remote Modem... to configure and initialize the
modem that attaches to the hub, and then select Local Modem... to
configure the modem that stays attached to the PC running HP Stack
Manager.

Configuring Data Switching Devices

If you will be using HP Stack Manager through a data switching device (such
as a data switch, data terminal controller, PBX switch, or X.25 PAD), you
may need to configure the switching device. Use the terminal support
selection in the Settings menu.

Connecting and Disconnecting

The [Connect] button on HP Stack Manager’s main screen causes the program
to establish a connection to the hub (or chain of hubs) using the current
PC-to-hub communication settings. The [Disconnect] button terminates the
communication connection between HP Stack Manager and the hub (or
chain of hubs).

2-6

HP Stack Manager

Installing and Using HP Stack Manager

Automatic Chain Display

Once the connection is established between HP Stack Manager and the hub,
information about the hub is displayed in the Device Chain List on the main
screen. If the hub is connected to a Distributed Management Chain, the
Device Chain List shows all detected hubs on the chain. The information
displayed for each detected hub includes the hub model and its MAC
address. You can select and access any of the chained hubs and, if you so
desire, monitor their and/or change their configuration. You can reorder the
displayed sequence of the hubs in the list by clicking on a hub and
“dragging” it to its new location.

To see the product number of the module installed in the expansion slot of
the hub, select the hub and press the [Shift] key and double click the mouse.

Hub Panel Graphic

The Hub Panel Graphic display is a graphical representation of the front of
the hub. This display is accessed when you “double-click” on a hub listed in
the Device Chain List, or when you click on the hub and then click on the
[Access] button.

You can use the Hub Panel Graphic to perform configuration tasks and get
hub and port status information. A toolbar near the top of the graphic
contains push-button icons that you can click on to perform various
functions. A message bar at the bottom of the graphic will identify the icons
as you pass the mouse cursor over them. For more information on the use
of the graphic, refer to the online help by pressing [?] (question mark icon) in
the toolbar.

Redundant Uplink Connections

If you click on an uplink port and then click on the Port Settings icon, you
can set up redundant links. Select the Redundant Uplink checkbox to
specify if you want the second uplink port to take over if the current uplink
fails. The second uplink connection is the uplink connection that is not
actually being used as the uplink port. For example, if you select Uplink A
to be the active port, Uplink B will become the active port if Uplink A fails.
Note that the redundant uplink feature is not available from the HP J2410A
100VG Hub-15; that hub has only one uplink port.

Remember that only one uplink connection will transmit and receive traffic
at any given time.

2-7

Installing and Using HP Stack Manager

LAN Traffic Statistics

The Hub Panel Graphic provides two bar graphs that indicate current
network activity of the hub:

The LAN Activity % graph identifies the proportion of total LAN

bandwidth seen by the hub within a sampling time interval.

The High Priority % graph indicates the proportion of hub LAN packets

that are high priority packets within a sampling time interval.

100VG LAN Port Status

In the Hub Panel Graphic, the color and symbol for each port indicate its
status. See the HP Stack Manager online help for definitions of the port
status colors and symbols.

HP Stack Manager

Note The packet-priority setting for a port depends on the network access

100VG LAN Port Settings

For a particular 100VG LAN port, you can view current settings or change
settings through the Ports Settings window. The Ports Settings window is
displayed through the Hub Panel Graphic. First, select a port by clicking on
a LAN port symbol. Then click on the Ports Setting icon in the toolbar.

In the Ports Settings window, you can configure each 100VG LAN port as
follows:

enable or disable a port
specify training type: any device, private, or cascade
allow high-priority packets, or force the demotion of high-priority

packets to normal-priority packets

requirements of the attached device. For more information, refer to the
included HP 100VG-AnyLAN Technology Guide.

2-8

HP Stack Manager

Installing and Using HP Stack Manager

If you select an Uplink connection and then click on Port Settings, several
options are added to the Port Settings dialog. Ignore these options unless
you are interested in using the second uplink connection in a redundant
uplink configuration (described on page 2-7). With a second cable
connected you can choose which connection is the active uplink port. By
default, Uplink A is the active port. After you have selected the active port,
turn on Redundant Uplinks by clicking on the Redundant Uplinks check box
under Device Configuration in HP Stack Manager.

If you are not using the Redundant Uplink feature but would like to use the
second uplink connection as a downlink port, select 12B from this dialog.
Note that if you use port 12B as a downlink port, port 12A will no longer be
active and data will not be transferred through the cable connected to this
port.

Hub Identification

If you click on the ID icon in the toolbar of the Hub Panel Graphic, you will
display the Identify window. The Identify window lists general information
about the currently selected hub.

From this screen you can also modify some of the descriptive information
about the hub. This allows you to uniquely identify the hub, for example to
describes its location or usage.

2-9

Installing and Using HP Stack Manager

Device Configuration

Allows you to specify three selections:

whether cabling is bundled (default is “some bundled”). If any ports on
the hub are connected to a 25-pair bundle, ensure that the hub port
cabling is set to “some bundled”.

the type of frames transmitting through the hub (Ethernet or Token Ring)

how addresses should be displayed (Ethernet or Token Ring)

(Because the HP J2414B 100VG/ET SNMP/Bridge Module does not support
Token Ring, Token Ring cannot be selected if this module is installed in the
hub.)

Network Counters

LAN port counter values are useful when diagnosing problem conditions.

HP Stack Manager

If you click on the Counters icon in the Hub Panel Graphic toolbar, the
Counters window is displayed. In the Counters window, a summary table
lists several counter values for the LAN ports. You can view other groups of
counters using the “Counter Group” selection list.

Counters provided are listed on the next page.

2-10

HP Stack Manager

Installing and Using HP Stack Manager

Counter Definition
Readable frames received 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.
Readable octets received The count, in octets, of valid frames received by the port.
Unreadable octets received The sum of all octets in the null addressed frames (during

training) and the following faulty frames that have been

received by the hub: IPM Frames Received, Oversize

Frames Received, Data Rate Mismatches, and Data Error

Frames Received.
Data error frames received The count of frames received with any of the following

errors: FCS, bad symbol, symbol balance, undersize, or

bad end-of-packet marker.
Broadcast packets received Broadcast frames are frames that all devices in a

network must receive
Multicast packets received Multicast frames, like broadcast frames, must be

processed by more systems/devices than a simple

“unicast” frame.
Frames with IPMs (Invalid Packet Markers) received The count of frames received with an invalid packet

marker.
Oversized frames received 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).
Transitions into training The number of times the port has entered the training

state.
High-priority frames received 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.
High-priority octets received The count in octets of all high priority frames received on

the port.
Normal-priority frames received The count of normal priority frames received on the port.

The count includes both valid and invalid normal priority

frames as well as normal priority training frames.
Normal-priority octets received The count in octets of all normal priority frames received

on the port.
Null Addressed frames received Frames received by this port that have an address with all

zeros. Such frames are valid during the 802.12 port

training process.

2-11

HP Stack Manager

Installing and Using HP Stack Manager

Security Features

The Hub-14 has built-in per-port security. After you have set up security by
clicking on the Security icon, security violations are reported in the Intruder
Log.

You can specify three levels of security on a single port or all ports on the
hub. You can set the hub to learn a port’s authorized MAC address
automatically by either continuous learning or acquiring the first address
heard. Alternatively, you can assign an address directly.

The method used to learn the authorized MAC address should be chosen
based on the level of data security required on a port. For continuous or
first heard methods, the port learns the device’s address from the source
address field in the training packet.

Continuous Method-provides minimum port security. The “continuous”
method allows the hub to continuously update the authorized MAC address
configured for a port. Each new device connected to the port becomes the
new authorized device. This security method is useful for dynamic
workgroups that experience frequent changes to end-user configuration and
require minimal data security protection.

First-Heard Method-provides medium port security. The “first heard”
method automatically assigns the first address detected on the port as the
authorized MAC address. This method is useful to quickly identify and
authorize end users. Under this method, the port will retrain automatically if an
intruder is detected on the port and will not permit an unauthorized end-node to
ever complete training.

Assign an Address-provides the highest security. You can assign an
authorized MAC address by entering it manually at the hub console interface
or at the network management station. Assigning a specific address provides
the maximum control of the port’s authorized MAC address. The security
that you have configured for that port is implemented as soon as the address
is assigned. Again, the port will retrain automatically if an intruder is
detected on the port, and end-nodes other than the authorized one will not
be permitted to complete training.

2-12

HP Stack Manager

Installing and Using HP Stack Manager

Interoperability with Pre-Standard IEEE 802.12 100VG Devices

The IEEE 802.12 standard specifies that null address training should not be
successful. To be interoperable with pre-standard devices which may
depend on null address training, HP Stack Manager, HP Interconnect
Manager, and the ASCII console have added an option. In HP Stack
Manager’s Port Security Configuration dialog box, the option is called
“Prevent Training with Null Address”. The default is to allow null address
device training. If you change this option to disallow null address training,
be aware that some pre-standard devices (e.g., pre-standard LAN adapters),
may need to be upgraded (for example, a new driver may need to be
installed).

Once the port has been assigned or has learned an authorized address, only
that address will be allowed to pass training at the port. Any other address
(including null) will fail training. This is true regardless of how the Null
Address option is selected. However, if you have updated the device (e.g.,
LAN adapter) to be compatible with the IEEE 802.12 standard, then you can
use any of the security options.

After you have selected how the MAC address is to be authorized, you need
to specify the type of training allowed:

Private mode is when an end node or a port on the hub receives only
packets specifically addressed to it. Private mode is recommended for
typical end node to end node communications such as file server to client
communications. Private mode provides security against promiscuous
listening.

Cascade mode allows repeaters connected to the port to receive all traffic,
as they need to. Any other type of device that trains on the port will be
automatically restricted to Private mode listening.

Any Device allows any device such as a private end-node, switch, network
analyzer, or a repeater to train. This mode provides no security against
promiscuous listening.

Thorough training descriptions are described in the included
HP 100VG-AnyLAN Technology Guide. Because training and address
security are related, you can set up both types of security from the Port
Security Configuration dialog in HP Stack Manager.

Note that 100VG will not transmit unicast packets except to promiscuous
end-nodes or nodes with the matching address. Thus, private end-nodes are
prevented from eavesdropping.

2-13

HP Stack Manager

Installing and Using HP Stack Manager

Send Alarm

Any port may be configured to send an alarm (trap notification) to the
network management station when an unauthorized MAC address or
training capabilities violation is detected on the secured port. The
functionality of the Send Alarm feature depends on whether you have an
HP 100VG SNMP/Bridge Module installed in any 100VG hub in your
management chain.

Without an HP 100VG SNMP/Bridge Module Installed

If you do not have an HP 100VG SNMP/Bridge Module installed in the stack
of chained hubs, traps will not be received by a network management station.

With an HP 100VG SNMP/Bridge Module Installed

If an HP J2414B 100VG/ET SNMP/Bridge Module is installed in the stack of
chained hubs, you can specify an authorized managers list that specifies the
network addresses of the SNMP management stations authorized to manage
the hub and whether they should receive SNMP event alarms. You must
authorize at least one network management station to receive the trap
notifications by entering the IP or IPX address of the network management
station in the authorized managers list. Use the Authorized Managers
command from the hub’s console to configure these addresses.

This module will forward traps for all unmanaged hubs (e.g., Hub-14,
Hub-7M, or Hub-15.)

Intruder Log

You should check this screen periodically for security violations.
This command displays information on stations that try to access the hub

illegally. This screen displays the stations MAC addresses, the type of illegal
access such as invalid training, or invalid address, and the time the violation
occurred. The time of the violation is relative to the current PC date and
time. Selecting an entry for a given port and pressing “Clear Alarm” will
allow the hub to detect future security violations.

2-14

HP Stack Manager

Installing and Using HP Stack Manager

Hub Reset

You can reset the hub through the Hub Reset dialog box. The Hub Reset
dialog box is displayed when you click on the Hub Reset icon in the toolbar
of the hub panel graphic. Two reset options are available:

Power-on reset
Factory reset (only available if an HP 100VG SNMP/Bridge module is

installed in the hub)

The power-on reset option has the same effect as pressing the Reset button
on the front of the hub, or cycling power on the hub. The effects are the
following:

the start-up self-test is performed on the hub, which initializes and tests

the hub hardware

all the network counters are reset to zero
each network port to which an active end node or hub is attached

automatically retrains to re-establish the network connection

if installed, the bridging operation of the HP 100VG SNMP/Bridge module

is interrupted for the duration of the reset process

hub configuration information (such as ports enabled or disabled)

remains unchanged

The factory reset option is available in the HP Stack Manager Reset dialog
box for hubs with an HP 100VG SNMP/Bridge Module installed. If you are
concerned that the hub’s configuration may be incorrect and that it may be
causing the hub’s abnormal behavior, try this option

This option causes the hub to perform its power-on self-test with the same
effects as the power-on reset, and the factory default configuration is
restored (except any IP configuration, which is not changed).

Note When you perform a reset, the HP Stack Manager communication with that

hub will be interrupted until the reset completes.
If you reset the hub to which the PC is physically connected, the connection

between the PC running HP Stack Manager and the hub will be terminated;

2-15

Installing and Using HP Stack Manager

you will have to press the [Connect] button in the HP Stack Manager main
screen to re-establish the connection to access the hub or chain of hubs.

If you reset one of the other hubs in the chain (not the one to which the PC
is physically connected), the HP Stack Manager session will continue but
access to that hub will be lost until the reset process completes on that hub.

Occasionally, HP Stack Manager may not be able to automatically relocate
the hub and you will not be able to re-establish access to that hub even
though it may still be visible in the device chain list. In that case, press the
[Refresh] button on the Hp Stack Manager main screen and the entire list of
hubs will be quickly rediscovered and access will be restored.

HP Stack Manager Advanced Features

HP Stack Manager

Some additional management features are accessible through HP Stack
Manager when an optional HP J2414B 100VG/ET SNMP/Bridge Module is
installed in the hub. Advanced HP Stack Manager features include the
following:

Advanced embedded agent code that supports SNMP (Simple Network

Management Protocol) for remote management over the network.

Configuration of IP parameters to allow the hub to be managed from an

SNMP network management station on an Internet Protocol network.

Setting passwords to protect access to the hub through the RS-232

console port or SNMP-based network management stations.

Setting Authorized Managers (SNMP-based network management

stations) that can access the hub and will receive traps from the hub.

Performing Network Tests for troubleshooting network communication

problems.

Viewing 10:100 and 100:10 bridge counters for monitoring bridge module
operations. The display of selected bridge counters will be selectable
through the “Counter Group” selection list in the Counters window.

Performing a Factory Reset to reconfigure the hub to its original factory
configuration settings.

Enable or disable bridging and set bridge address aging time.

2-16

HP Stack Manager

Installing and Using HP Stack Manager

Automatic ability to communicate with other devices on a Novell
Netware (IPX) network.

Password protection for access to the hub through the RS-232 console
port or SNMP-based network management stations.

HP EASE (Embedded Advanced Sampling Environment) for trend
analysis of your network. (To use EASE, you need to buy the optional
EASE software.)

Full modem support.

2-17

3

LED Error Indications
Troubleshooting Checklist
Unusual Network Problems
End to End Network Tests
Diagnostic Tests

Troubleshooting

Troubleshooting

LED Error Indications

Most problems with the hub can be diagnosed using the LEDs.

LED patterns indicating problems

Power Fault Exp Slot Uplink A,

Uplink B

OFF * * * *

ON ON ON or

OFF, not

Flashing

ON ON Flashing

Slowly

ON ON Flashing

Rapidly

**

**

**

Diagnostic Tips

RPS

Check power cord and power source connections. If connections are
secure, then try a different outlet or try a different hub to see if the
power cord is the problem.

Disconnect power and reconnect power. If the Fault light is still on,
the hub failed self-test.
Did you set up the hub to support Token Ring framing and then insert a
100VG SNMP/Bridge Module? If so, remove the module and change
the frame type back to Ethernet through software. Then reinsert the
module. (The ASCII console will report this error on the screen if you
connect an ASCII terminal to this hub.) Verify this module is permitted
in the hub. If the problem persists, replace the hub by following the
replacement instructions at the end of this chapter.

The HP 100VG SNMP/Bridge Module failed its self-test because of a
hardware problem. Verify module installation and check the LED on
LAN adapter card in end node. If the condition persists, replace the
module.

The HP 100VG SNMP/Bridge Module failed its self-test because of a
firmware problem. Verify module installation and check LED on LAN
adapter card in end node. If the condition persists, replace the
module.

ON Flashing * * Flashing

Troubleshooting

ON

ON

* * OFF or

Flashing

when the

port is in

use.

ON OFF

* * The hub firmware is corrupted or the download of new hub firmware

3-2

The Redundant Power Supply (RPS) may no longer be providing
power. See the documentation provided with the RPS for
troubleshooting.

* Check cabling on the indicated port.

Check the port status in HP Stack Manager 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.

was not completed. You can obtain hub firmware from the sources
listed on page 3-8. If the first download was not successful, attempt to
download the firmware again. Always verify that the module in the
100VG Expansion Slot has been removed before downloading the
firmware to the hub.

Troubleshooting

LED patterns indicating problems

Power Fault LAN

Ports

ON * OFF or

Flashing

for a

port in

use

ON * * Flashing

ON * Flashing

Rapidly

Security Module

Rapidly

Flashing

Rapidly

LEDs

**

Link training has failed on the indicated port most likely because of
a faulty or improperly wired cable.

Check cabling on the indicated port.

Check the port status in HP Stack Manager to determine whether
link training failed due to a cabling or a capabilities configuration
error.

An SNMP violation has occurred on a managed hub because an

*

unauthorized network management station tried to access the hub.
Use HP Stack Manager, HP Interconnect Manager, or the ASCII
console to view the Intruder Log and check the type of violation
that occurred.

When you are finished viewing the log, you can stop this Security
LED from flashing by clearing the violation if the intrusion has
stopped. If the Security LED continues to flash and the network
management station then check the authorized managers list to
see if other network management stations need to be added.

A security violation has occurred on a secure port on a managed

*

or unmanged hub because of an address or training capabilities
violation. With HP Stack Manager, HP Interconnect Manager, or
the ASCII console, view the Intrusion Log.

Diagnostic Tips

Troubleshooting

ON Flashing * * Flashing

*This LED is not important or may be in an unknown state.
The slow flash rate is approximately once each 1.5 seconds, the rapid flash rate is approximately twice per
second.

For information on other LED indicators on the hub, refer to chapter 4, “Hub
Reference”.

When you are finished viewing the log, you can stop this Security
LED from flashing by clearing the violation if the intrusion has
stopped. If the Security LED continues to flash, then verify the
training capabilities on the hub port are what you want and if so
you may want to disable the port using the ASCII console, HP Stack
Manager, or HP Interconnect Manager.

The transceiver does not sense link beat on the connected node.
See the module manual for troubleshooting information.

3-3

Troubleshooting

Troubleshooting Checklist

Most problem are caused by the following errors:

Incorrect installation. Incorrectly installing the hub (including any
optional modules) can result in improper operation. If one or all of these
components appear to not be functioning, re-check the installation
procedure in chapter 1 and, if necessary, re-install the component
correctly.

Wrong type of cable. Use only Category 3, 4, or 5 four-pair, unshielded
twisted-pair cable rated at 100 ohms. If your cable contains four twisted
pairs and supports the IEEE 802.3 Type 10Base-T standards, 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.

Troubleshooting

Bad cable. Try a different cable.

Bundled or unbundled cable. Verify you have followed selected the

correct type by reading page 1-16.

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.

Distributed Management Chain is incorrectly wired. If you can’t
see chained hubs in HP Stack Manager, verify your hubs are chained like
the illustration on page 1-22. Verify your cables comply with the
specifications in appendix A.

Incorrect topology. You may not have a valid topology. 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.

If the above problems do not exist, try the following:

Reset the hub. Remove the power cord and re-insert the power cord.
(Alternatively, you can reset the hub by using the power-on reset
command in HP Stack Manager, HP Interconnect Manager, or the ASCII
console). You can factory reset the hub (if an HP 100VG SNMP/Bridge
Module is installed in the hub), as described on page 2-15.

3-4

Troubleshooting

Verify LAN link communications. Use HP Stack Manager’s software
to check the Link Training status for each LAN port. These tests are

available only on hubs that have an HP 100VG SNMP/Bridge Module
installed.

To test the hub’s ports and the attached network links, choose one of the
following ways to run a test between the hub and an addressable device
connected at the remote end of each of the cables you wish to test:

• Select Link Test from HP Stack Manager’s Network Test dialog box.

This causes the hub to send IEEE 802.2 Test command packets to a
specified network device. The device must be able to send an IEEE

802.2 Test response packet upon receipt of a Test command packet.
You specify the remote device by its 12-digit hexadecimal MAC
address.

• Select Ping Test from HP Stack Manager’s Network Test dialog box.

This is a network layer test that you can run on TCP/IP networks.
The hub sends IP Echo Request packets to a specified network
device. This works with devices that have an IP address and are able
to respond to an ICMP Echo Request packet. You specify the remote
device by its IP address. Note that to perform this test the hub must
have an IP address.

• Select IPX Test from HP Stack Manager’s Network Test dialog box.

This is a network layer test that you can run on Novell NetWare IPX
networks. The hub sends IPX test packets to a specified network
device. This works with devices that have an IPX address and are
able to respond to an IPX test packet. You specify the remote device
by its IPX address.

If the test passes, the hub’s port, the network link, and the remote device are
all working properly.

If the test fails, you can test the hub using the “Hub Reset” procedures
described on the previous page. You should also verify that the remote
device is powered on and functioning properly, and that the cable is good.

If the hub passes its tests, but the network test (link test, Ping test, or IPX
test) fails, the problem is in the cabling, the remote device, or possibly the
output circuitry of the hub’s port.

See the HP Stack Manager online help for more information on how to
execute these tests.

Troubleshooting

3-5

Troubleshooting

Unusual Network Activity

Network activity that exceeds accepted norms may indicate a hub or
network problem. Most of the time, the unusual network activity can be
removed by making sure that your network cabling and network topology
adhere to the standards and requirements described in the HP 100VG
AnyLAN Technology Guide.

Use HP Stack Manager to view the status of the LAN ports and to retrieve
counter values. The counters can provide indications of unusual network
activity. The following table indicates some typical error symptoms and the
most likely causes of those symptoms:

Symptom Cause

Troubleshooting

High value for the

Data Error Frame

counter in HP Stack

Manager counters

screen

High value for the

Priority Promotions

counter in HP Stack

Manager counters

screen

You may be using a bundled cable on a promiscuous port in a
network that is transmitting many group-addressed packets.
Make sure that promiscuous ports, for example the Uplink
port in a hub-to-hub connection, are always connected using
unbundled cable. Note that this cabling error may result in
high Data Error Frame counts on other ports than just the
promiscuous port.

There may be excessive high-priority traffic on the network.
Make sure that only those end nodes that are authorized to
run in high-priority mode are configured to do so.
High-priority mode is set by configuring the LAN adapter
driver appropriately. You can limit which nodes are allowed
to send high-priority traffic in the Port Settings screen in
HP Stack Manager—set the port configuration to “Normal
Priority Only”.

When using the bridge functionality of the HP J2414B 100VG/ET
SNMP/Bridge module, see the troubleshooting chapter in the HP J2414B
100VG/ET SNMP/Bridge Module Installation and Reference Guide.

3-6

Troubleshooting

End-to-End Network Tests

If your PC LAN adapters (or end nodes) support network communication
tests, you can perform these tests through the HP 100VG hub to help isolate
network problems. Refer to your LAN adapter documentation for more
information on available network communication tests.

Communication tests through the hub can be performed between two 100VG
LAN end nodes equipped with 100VG LAN adapters. If the HP 100VG hub
contains a bridge module, you can perform communications tests between
an Ethernet/IEEE 802.3 LAN end node and a 100VG LAN end node.

Troubleshooting

3-7

Troubleshooting

Customer Support Services

Hewlett-Packard offers support 24 hours a day, seven days a week through
the use of automated electronic services including:

Hewlett-Packard BBS and World Wide Web

Hewlett-Packard FTP Library Service on the Internet

CompuServe

HP FIRST FAX Retrieval Service

Through the HP BBS, World Wide Web, CompuServe, and the HP FTP
Library Service, the following software is available:

HP Stack Manager (stkmgr.exe),

SNMP firmware, HP 100VG SNMP/Bridge Module (j2414b.exe)

Troubleshooting

Hub-14 firmware (j2415a.exe)

After you download the file(s) from one of these sources, you type
/x. For example, icmupdt /x . If you can’t find the j2415a.exe software, call
your HP-authorized dealer.

HP BBS and World Wide Web

The HP BBS phone number is [phone]. Set your modem
communication settings to:

parity = N (none)

data bits = 8

stop bits = 1

baud rates = 300, 1200, 2400, 4800, 9600, or 14400

From the BBS, you can download files and learn about HP networking
products. After you download the file, extract the file (e.g., icmupdt /x)

The URL address for the World Wide Web is:

http://www.hp.com/go/network_city

filename

From this web site, you can download files and learn about HP networking
products. After you download the file, extract the file (e.g., icmupdt /x)

3-8

Hewlett-Packard FTP Library Service

To access the HP FTP Library, follow these steps:

1. Enter the command:

ftp ftp-boi.external.hp.com

The ftp> prompt appears.

2. At the ftp > prompt, enter:

anonymous

3. At the password prompt, enter your internet e-mail address.

4. Change directories:

cd /pub/networking/software

5. At the ftp > prompt, set the transfer type to binary:

Troubleshooting

bin

6. List the contents of the directory:

dir

7. Retrieve the file by entering:

get

filename

8. Quit the FTP session by entering:

quit

9. Extract the file (e.g., j2414b /x)

(e.g., get j2414b.exe)

Troubleshooting

3-9

Troubleshooting

CompuServe

CompuServe is an electronic information and communication service run by
an independent company. The service is typically accessed with a computer
and modem and uses standard voice telephone lines for transmitting and
receiving data. CompuServe is available 24 hours-a-day, seven days per
week. The participants pay a monthly fee for this service. To get the latest
agent firmware from CompuServe, follow these steps:

1. Login to CompuServe.

2. Type: go hpsys

3. Type: lib 7

4. Type: download

5. Log off CompuServe.

6. Extract the file (e.g., icmupdt /x)

filename

(e.g., download icmupdt.exe)

3-10

Troubleshooting

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.A. customers through an NPS contract or
at an hourly rate (1-800-790-5544) Monday through Friday, 5 am to 6 pm.

Troubleshooting

3-11

Troubleshooting

Replacement Instructions

The faulty hub should be returned to Hewlett-Packard in the following
configuration (as depicted by the illustrations on this page):

the expansion slot on the back is empty and the cover plate is installed

the modular slots on the front are empty and their cover plates are
installed

See the module manual for instructions on how to remove modules from the
hub safely. See the 100VG transceiver manual for instructions on how to
remove the 100VG transceivers.

Caution The modules can be damaged easily by small amounts of static electricity.

Observe these precautions when removing and installing the modules:

When handling the module, first touch a grounded metal surface, or wear
an antistatic wrist strap that is attached to grounded metal.

To prevent generating static electricity, minimize your movement around
the work area, or work in an antistatic work area.

Troubleshooting

Handle the module carefully at all times. Avoid flexing it or touching its
components.

Once the hub has no optional modules in it and the cover plates are
installed, it is ready to be returned.

Place the hub back into its original packaging or into the box in which the
replacement hub was shipped and return it to your HP-authorized LAN
dealer, or contact your HP representative for assistance.

3-12

4

Front of the Hub
Back of the Hub
Cascading Hubs
Chained Hub Operation
Serial Port Communications
Hub Management
Security Features
Optional Modules
Firmware Enhancements

Hub Reference

Hub Reference

Hub Operation

Front of the Hub

Hub Status and Port LEDs

The hub status and LAN port LEDs indicate whether or not the hub is
functioning properly.

LED State Meaning

Power (green) On The hub is receiving power.

Off The hub is not receiving power.

Fault (orange) Off Self tests have not detected any faults on the hub.

On The hub or Expansion Slot module has failed its self-test after the hub has been

powered on or reset.

Flashing

Slowly*

Console (green) Off The hub is not being accessed by HP Stack Manager or if an SNMP module is

On This hub is currently being accessed by HP Stack Manager or the ASCII console.

Exp Slot (green) On An optional module is properly installed in the hub’s back panel slot.

Off An optional module is not installed.

Flashing

Slowly*

Uplink A,
Uplink B (green)

Hub Reference

Off The Uplink port is disabled.
On The Uplink port is connected and has successfully trained with an upper-level

Flashing

Slowly*

Flashing
Every 10

seconds*

If the bridge module is installed, this LED indicates a problem with the 10Base-T
connection or part of the module itself. Otherwise, this LED should only occur in
tandem with the RPS LED indicating an RPS failure.

installed, the ASCII console.

The module is performing its self-test (after hub power on or a reset). If the rate
of flashing increases and the flashing continues for more than approximately 30
seconds, refer to chapter 3, “Troubleshooting”.

hub.
There is a problem with the cable or the permissions on the upper-level hub.

The backup link of the primary link will flash every 10 seconds to indicate an end
node is detected on the other end and that the cable is working.

Continued on the next page

4-2

Hub Status and Port LEDs (continued)

LED State Meaning

Security (orange) Off No security violation detected (the normal state).

Hub Reference

Flashing

Rapidly

RPS (green) Off This hub is not receiving power from the HP J2962A Redundant Power Supply

On This hub is receiving power from the connected RPS.

Flashing

Slowly*

Activity (green) Off No network traffic is present on the hub.

Flashing ON while a packet is being transmitted on any port. Normally, the LED appears to

Cascade (green) Off No cascading of hubs has been detected.

On This hub is cascaded with another hub either through the Uplink port or through

LAN Port LEDs
(green)

These indications
apply only if hub
self-tests
complete
successfully.

Off The port is disabled.

On The port is enabled and has trained successfully with an attached device.

Flashing

Slowly*

A security violation has occurred on a port. The corresponding port is flashing at
the same time for the port violation. Otherwise an SNMP intrusion has occurred
on the SNMP/Bridge module. This intrusion may have occurred before the last
hub reset. This LED will persist until it is cleared in software.

(RPS).

An error has occurred on the RPS connected to the hub. See the documentation
provided with the RPS for troubleshooting.

flicker. In heavy traffic, it may appear to be on all the time.

one or more of the LAN “downlink” ports.

There is a port fault. The port is enabled but a training (or connection) fault has
been detected.

Hub Reference

* The slow flash rate is approximately once each 1.5 seconds, the rapid flash rate is approximately twice per
second.

4-3

Hub Reference

Reset Button

The Reset button resets the hub and performs the power-on self-test. It is
recessed to prevent accidental resets. For a description of the effect of this
reset, see page 2-15.

Distributed Management Chain Extension Ports

The Extension ports are used for chaining multiple hubs together on a
special bus called the Distributed Management Chain. This chain is
independent of any LAN connections, and allows you to manage multiple
hubs from a single management station. Chained hubs can be adjacently
located or physically distributed. The chain can extend up to a total
distance of 185 meters and can connect up to 16 AdvanceStack hubs.

For chaining, standard unshielded twisted-pair cables with RJ-45 connectors
are used. Refer to appendix A for detailed cable information.

Access to hubs on a Distributed Management Chain is accomplished in two
ways:

Out-of-Band Management: From a Windows-based PC (running
HP Stack Manager) connected to an RS-232 Console Port on one of the
hubs in the chain.

In-Band Management: From a network management station running a
supported network management utility. For in-band management, an
Expansion Slot module that supports SNMP (Simple Network
Management Protocol) must be installed in at least one of the HP 100VG
hubs in the chain. For more information, refer to the Hub Management
section later in this chapter.

RS-232 Console Port

A hub’s Distributed Management console port is a standard RS-232 serial link
used to connect a Windows-based PC running HP Stack Manager. The
connection can be a direct serial connection, a remote connection using a
modem link, or a connection through a data switching device.

If the hub is connected to other hubs on a Distributed Management Chain,
the console port PC (running HP Stack Manager) can access any hub on the
chain.

Hub Reference

4-4

Hub Reference

RJ-45 100VG LAN Ports

The Hub-14 has 12 twisted-pair LAN ports to connect network devices, such
as end node PCs, servers or other hubs. The LAN ports consist of built-in
(8-pin) jacks for use with twisted-pair cables. Each LAN port requires four
twisted-pair wires (8 wires total). Each LAN cable can be unbundled or
bundled as described on page 1-16.

The hub can operate in a “store-and-forward” mode when transmitting
broadcast and multicast packets to minimize crosstalk on bundled cable
(cable with 25 or more twisted-pairs). Store-and-forwarding allows
group-addressed packets to be transmitted to all ports by storing the packet
as the end node transmits it, and then re transmitting the packet once
reception from the end node is complete. This prevents the simultaneous
transmission and receptions of packet signals on bundled cable that can
cause crosstalk interference.

If you presently have a four-pair, twisted-pair cable network that complies
with the Ethernet/IEEE 802.3 standard, you can use the same cables on a
100VG network.

For more information on supported LAN port cables, see the
HP 100VG-AnyLAN Technology Guide and refer to appendix A.

100VG Modular Slots

The Hub-14 has two modular LAN ports to connect to other 100VG hubs or
end nodes. Each modular port accepts an optional transceiver such as the
HP J3028A 100VG Twisted-Pair Transceiver Module or HP J3030A 100VG
Fiber-Optic Multimode ST Transceiver Module. (Other transceivers may be
available. Contact your HP-authorized dealer for more information.) You
can use these ports as uplink ports or use port 12B as a downlink port. (Be
sure to read the section titled Optional Downlink Port (12B) on the next
page for more information.)

Redundant Uplink Slots By default, these slots are for cascading hubs
together on a 100VG network. In these slots you can install the optional
100VG transceivers listed above.

Redundant means that one uplink is a backup of the other. If one link were
to fail, the other link will take over. Only one of the uplink connections will
be active and transfer data at any given time. An Uplink port on a
lower-level hub connects to any of the LAN downlink ports on an upper-level
hub using appropriate cable for a 100VG connection. For additional LAN
cable information, refer to appendix A.

Hub Reference

4-5

Hub Reference

The Uplink port is a special promiscuous LAN port. As a promiscuous port,
it sends and receives all packets to and from the upper-level hub. It is a
special port because it can transmit multiple packets to the upper-level hub
(for example, to accommodate the multiple end nodes that may be
connected to the lower-level hub).

Note The Uplink port can only be used to connect to an upper-level hub or switch

and requires an unbundled LAN cable. The use of the Uplink port to connect
to an end node or similar device is not supported.

Optional Downlink Port (12B) This port can be used to create a
fiber-optic backbone to another Hub-14 by installing fiber-optic transceivers
into both hubs. If you do not want to use redundant uplinks and would
rather use the modular port as a flexible media downlink port, you can
connect a cable to the port labeled “Uplink B or 12B”. Before or after you
connect the cable to this port, use HP Stack Manager or HP Interconnect
Manager to specify that this port is to be used as a downlink port rather than
an uplink connection (default).

Cable Management Bar

A cable management bar helps you manage the routing of your cables. For
more information, refer to chapter 1, “Installing the HP AdvanceStack Hub”.

Hub Reference

4-6

Hub Reference

Back of the Hub

100VG Expansion Slot

The 100VG Expansion Slot is used to add any of the following modules:

HP J2414B 100VG/ET SNMP/Bridge Module

HP J3157A AdvanceStack 100VG Dial-A-LAN 2A/Plus Bundle

HP J3158A AdvanceStack 100VG Dial-A-LAN 4A Bundle

HP J3159A AdvanceStack 100VG Router 210 Bundle

For more information on these module, refer to the “Optional Modules”
section of this chapter.

Power Connector

The hub does not have a power switch; it is powered on when the power
cord in plugged into the power connector. The hub’s power supply
automatically adjusts to any ac power source between 90 and 240 volts.
There are no voltage range settings required.

Redundant Power Supply (RPS) Connector

The RPS connector allows you to connect this hub to the HP J2962A
Redundant Power Supply. When an HP RPS is connected, the Hub-14
receives uninterrupted power.

100VG-AnyLAN Technology

The HP AdvanceStack 100VG hubs are intelligent multiport repeaters. Their
design is based on the IEEE 802.12 100VG-AnyLAN standard. Data packets
coming into the hub from any of its ports are automatically regenerated and
transmitted to one or more LAN ports depending on the packet destination
or the port’s operating mode. The hub regenerates the data without
interpreting the contents, so it can be used with any upper-level protocol.
Because of frame-type compatibility, the hub can easily connect to an
existing Ethernet/IEEE 802.3 (10 Mbit/second) network when the
appropriate bridge and transceiver modules are installed.

For information on link training, repeater operation, demand priority
protocol, refer to the 100VG-AnyLAN Technology Guide included with this
hub.

Hub Reference

4-7

Hub Reference

Cascading Hubs

The Hub-14 has 12 downlink ports, any of which can be used to cascade to a
lower-level hub. Lower-level hubs contain uplink ports that must be used to
cascade up to an upper-level hub. In a network of cascaded hubs, the
uppermost hub (whose Uplink port is not used) is referred to as the level 1,
or “root”, hub.

Note Although you should minimize the levels of cascading, up to five levels of

cascaded hubs are supported. Three levels of cascaded hubs are
recommended.

A hub’s Uplink port is a special LAN port and may only be used for
cascading. Because the Uplink port operates in promiscuous mode, it sees
all traffic on a 100VG LAN.

For more information on 100VG LAN topologies, refer to the
HP 100VG-AnyLAN Technology Guide.

Hub Management

Out-of-Band Management

Out-of-band management refers to the ability to manage an
HP AdvanceStack hub, or chain of hubs, from a Windows-based PC running
HP Stack Manager or from an ASCII console. For hubs on a Distributed
Management Chain, the PC can be connected to the RS-232 console port of
any hub in the chain.

HP Stack Manager is a Windows program that serves as the console
interface for HP AdvanceStack hubs. It is the management program supplied
with your hub. With this program you can configure, monitor, and diagnose
your hub (or chain of hubs).

Both HP AdvanceStack 100VG and 10Base-T hubs on the same Distributed
Management Chain can be managed from a single HP Stack Manager

Hub Reference

console. However, HP Stack Manager features that can be used are device
dependent. Refer to chapter 2, “Installing and Using HP Stack Manager”, for
more details about the use of HP Stack Manager with 100VG hubs.

4-8

Hub Reference

Chained Hub Operation

HP AdvanceStack hubs (both 100VG and 10Base-T hubs) can be connected
together with standard unshielded twisted-pair cable through their
Extension ports (RJ-45) creating a Distributed Management Chain. The
chain can support up to 16 hubs and can extend up to 185 meters
(end-to-end) so multiple wiring closets can be managed from a single
location (for example, a single PC running HP Stack Manager). Note that

this is not a network connection, it is only a management connection
between the hubs. For information on the cables used on a Distributed

Management Chain, refer to appendix A.
HP AdvanceStack hubs use a Distributed Management Protocol to pass

command and data communications over the Distributed Management
Chain.

Hub Reference

4-9

Hub Reference

Serial Port Communications

The RS-232 serial port is used by a management console PC to communicate
with the hub, or to other hubs connected on a Distributed Management
Chain. For information on serial port configuration, refer to chapter 2,
“Installing and Using HP Stack Manager”, and to the online help system of
HP Stack Manager.

Note the following:

The port supports multiple baud rates: 300, 1200, 2400, and 9600 (default)
baud. When a connection is made, automatic sensing of the baud rate is
performed. (Higher rates are supported when an HP SNMP
Bridge/Module is installed.)

The port provides full V.22bis modem line control when connected to a
modem link for remote access to the hub (or chain of hubs).

In-Band Management

In-band management refers to the ability to manage an HP AdvanceStack
hub, or chain of hubs, from a network management station that is running a
supported network management utility such as HP Interconnect Manager.
The management station must be connected to the same network as the
hub.

If you have installed an HP J2414B 100VG/ET SNMP/Bridge Module, the hub
can be managed over the network and will allow management of any 100VG
hub connected to it through the Distributed Management Chain. The
HP SNMP/Bridge Module is required for a Telnet session to the ASCII
console.

Hub Reference

4-10

Hub Reference

Security Features

For ports operating in private mode, the hub provides inherent network data
security. A private mode port will only receive packets intended for the
attached device.

In cascade mode, only private end-nodes or cascaded repeaters (hubs) are
permitted to pass training. This mode should be used to permit promiscuous
access for just other hub connections while keeping other connections
private.

An any device mode allows all devices including promiscuous ones, to train.
Any device that requests to be promiscuous on this port will receive all
traffic. All other devices will be private. Ports configured for any device
mode operation can be identified using HP Stack Manager, HP Interconnect
Manager, or the ASCII console.

Security can be configured from HP Stack Manager, HP Interconnect
Manager, and the ASCII console. In addition to private, cascade, and any
device modes, you can specify three levels of address security on a single
port or all ports on the hub. When a security violation occurs, you can
specify whether an alarm is sent to the network management station. See
chapter 2 for details.

Devices are not allowed to pass training until their configuration matches
the port’s permission. (The hubs will see a security violation occur if a
device attempts training that is not permitted.)

If the port has address security configured, any attempt by the end-node to
transmit a packet with a source address other than its own will result in the
end-node being forced to re-train to be re-authenticated. Intrusion attempts
will be reflected in the port LED, and can be viewed in the Intrusion log via
HP Stack Manager (or also HP Interconnect Manager or the ASCII console
for a managed hub).

For SNMP-level security such as authorized managers and password
protection, you need to add the HP J2414B 100VG/ET SNMP/Bridge Module
as described on the next page.

Hub Reference

4-11

Hub Reference

Optional Modules

The following modules are described in this section:

HP 100VG SNMP/Bridge Module

HP Dial-A-LAN Bundles

HP Router 210 Bundle

Other modules may be available. Contact your HP-authorized dealer for
more information.

HP 100VG/ET SNMP/Bridge Module

The HP 100VG/ET SNMP/Bridge Module (HP J2414B) is an optional
component that can be added to an HP AdvanceStack 100VG hub to provide
the hub with a full 10:100 and 100:10 bridge capability. The modules supports
SNMP (Simple Network Management Protocol) and has extended
management features.

The SNMP/Bridge module is inserted into the 100VG Expansion Slot of the
hub. When the Expansion Slot cover is in place, the module will not be
visible. However, the Exp Slot LED on the front panel provides information
on the status of the module. For installation instructions, refer to the
documentation provided with the module.

Some additional management features are provided when the optional
HP J2414B 100VG SNMP/Bridge Module is installed in the hub. They are
described on page 2-16.

Hub Reference

4-12

Hub Reference

HP Dial-A-LAN Bundles

These optional products serve remote PCs, Macintoshes, and UNIX
workstations by allowing users to dial in to AdvanceStack hubs.

The two models are:

a two-port version: HP J3157A AdvanceStack Dial-A-LAN 2A Bundle

a four-port version: HP J3158A AdvanceStack Dial-A-LAN 4A Bundle

HP J23157A Dial-A-LAN 2A Bundle

The HP Dial-A-LAN 2A Bundle has two RJ-11 connectors and two built-in
V.34 modems. The V.34 modems support V.34, V.FC, V.32bis, V.32, V.22,
V.22bis, V.22A/B, V.23, V.21, Bell 212A, and Bell 103. They also support
compression and error correction as specified V.42, V.42bis, MNP 2-5, and
LAP-M.

HP J3158A Dial-A-LAN 4A

If you need more than two ports, the HP Dial-A-LAN 4A has four RS-232
ports for connecting up to four external modems. This module can also be
used in an ISDN environment with terminal adapters.

Both the 2-Port and 4-Port modules support these features:

Access speeds available to 115.2 Kbps. Throughput speeds available are
dependent on line quality, type of data transmitted, and the remote
node’s ability to function at this sustained rate.

Configurable through HP Stack Manager and from the Dial-A-LAN
Manager. Dial-A-LAN Manager can be run under OpenView
DOS/Windows and Windows.

PC and workstation dial-in access with PPP (default) and SLIP. IP, IPX,
NetBEUI, and LLC dial-in are also supported.

PPP compression available for dial-in and LAN-to-LAN connections.

DHCP support for dial-in client address assignment.

Hub Reference

4-13

Hub Reference

Macintosh dial-in access for with ARA 2.0. MacTCP supported for IP
connections.

Windows and DOS-based dial-out access through NASI and Int 14 for IPX
networks to remote BBS services. IP dialout supported with Telnet.

UNIX workstation dial-in access with SLIP or PPP for IP networks.

LAN-to-LAN routing for IP and IPX.

For more information about the HP Dial-A-LAN modules, see the
accompanying documentation or you can view the information on HP’s web
page: http://www.hp.com/go/network_city.

HP Router 210 Bundle

The HP J3159A AdvanceStack Router 210 Bundle is an optional module for
your 100VG hub. The router module includes two ports:

An external synchronous WAN port supporting RS-232/V.24/V.28, V.35,
X.21, or RS-422/RS-449/V.36 interfaces at speeds of 9.6 Kbit/s to 2.048
Mbit/s. This port allows HP Point-to-Point, PPP, V.25 bis (dial-up/ISDN),
SMDS, frame relay, and LAPB (X.25) connections to other routers, over
point-to-point or switched circuits

An internal Ethernet/802.3 LAN port, through which the router module
communicates with the hub

The router provides both bridging and routing capabilities and supports the
following routing services:

Internet Protocol (TCP/IP protocol suite)

DECnet Phase IV

Xerox XNS

Novell IPX

AppleTalk Phase 2

Transparent bridging with support for the Spanning Tree Protocol

The router module can be configured and managed in various ways:

Through the hub’s RS-232 Distributed Management port, connected
(locally, or through a modem) to a PC running the HP Stack Manager

Hub Reference

software supplied with the router module (HP Stack Manager runs the
router module’s VT-100 terminal interface)

Through any standard SNMP network management software, such as HP
Interconnect Manager in HP-UX

4-14

Hub Reference

Through Telnet access over the network

Additional features include:

“SmartBoot”, which allows another HP router or a BOOTP server on the
network to automatically configure the router module when it is first
booted after installation. This eliminates the need for expert personnel at
the site where the router module is installed

HP EASE (Embedded Advanced Sampling Environment)

The ability to download enhancements to the router module’s operating
system. The download is conducted through the hub’s RS-232 Distributed
Management port.

For more information about the HP Router 210 Module, see its
accompanying documentation or you can view the information on HP’s web
page: http://www.hp.com/go/network_city.

Firmware Enhancements

Hewlett-Packard continually improves its products. When firmware
enhancements are made to the HP AdvanceStack hubs, you will be able to
easily update them with the new code. The updated code can be loaded from
a PC attached to the hub’s RS-232 console port.

The update procedures are provided with the firmware enhancements.
See Customer Support Services in chapter 3 for information on how to

download the latest firmware.

Hub Reference

4-15

A

Recommended Cables
Twisted-Pair Cable/Connector Pin-Outs
RS-232 Console Port Connector and Cable Pinouts

Cables and Connectors

Note Incorrectly wired cabling is the most common cause of problems for LAN

Cables and Connectors

Cables and Connectors

This appendix lists cables that have been tested and verified for use with the
HP AdvanceStack 100VG hubs. It also includes minimum pin-out
information so, if you wish to use an unlisted cable, you can verify that the
cables used in your installation are correctly wired. Note that each pin-out
does not necessarily match the pin-out for the corresponding HP cable, but
cables manufactured to follow the minimum pin-out will function correctly.

communications. HP recommends that you work with a qualified LAN cable
installer for assistance with your cabling requirements.

These topics are discussed:

Recommended HP cables

Twisted-pair cable/connector pin-outs

Console connector and cable pin-outs

For cables to be connected to modules installed in the 100VG Xcvr Slots or
the 100VG Expansion Slots, see the documentation accompanying those
modules.

A-2

Recommended Cables

Cables and Connectors

Cables and Connectors

Cable Function Port Type on PC,

or Modem

Connecting devices and networks to the hub:
Connecting

twisted-pair LAN
ports

Connecting an
Ethernet/IEEE 802.3
LAN to ThinLAN
transceiver module

Connecting an
Ethernet/IEEE 802.3
transceiver to the
AUI port module *

* An AUI cable is not necessary with some transceivers such as the HP 28685B EtherTwist Transceiver, the HP 28641B ThinLAN
Transceiver, and the HP 28683A fiber-Optic Transceiver. These transceivers can be attached directly to the AUI connector on the
AUI port module.

Connecting a PC to the hub’s RS-232 console port:

Connecting a PC to
the hub’s RS-232 port

Connecting a
modem to the hub’s
RS-232 port

Chaining hubs together for distributed management
Distributed

Management Chain
Extension cables

— Unshielded

—

—

9-pin male RS-232-C 9-pin female

25-pin male RS-232-C 9-pin female

25-pin female RS-232-C 9-pin female

— Unshielded

Cable Type HP Product Number

92268A, B, C, D, or N (4-pair)

twisted-pair cable

IEEE Type 10Base2
Thin coaxial cable

AUI cable 92264D (1 meter)

to 9-pin female null
modem or
“crossover” cable

to 25-pin female null
modem or
“crossover” cable

to 25-pin male
standard modem or
“straight-through”
cable

twisted-pair cable

92214U (0.5 meter),
includes a BNC “T” connector and one 50-ohm
terminator

92254A through H (6–48 meters)
92254J (5 meters)

RS-232-C cable provided with the hub
(HP p/n 5182-4794)

HP 24542H

HP 24542M

92268A, B, C, D, or N (4-pair)

A-3

Cables and Connectors

Cables and Connectors

Twisted-Pair Cable/Connector Pin-Outs

Twisted-Pair Cable for 100VG LAN Ports

To connect PCs and other devices to the 100VG LAN ports, use a
“straight-through” 4-pair twisted-pair cable. The twisted-pair wires must be
twisted through the entire length of the cable.

The illustration below shows the RJ-45 pin connections, color code, and pair
configuration for an 100VG LAN cable (unbundled) that conforms to the
EIA/TIA 568B wiring standard for a straight-through cable.

Straight-through cable

white/brown

Pair 4

Pair 1

Pair 2

Pair 3

brown/white

blue/white

white/blue

white/orange

orange/white

white/green

green/white

Note Pins 1 and 2 must be wired to a twisted pair.

Pins 3 and 6 must be wired to a twisted pair.
Pins 4 and 5 must be wired to a twisted pair
Pins 7 and 8 must be wired to a twisted pair.

A-4

Cables and Connectors

Cables and Connectors

Twisted-Pair Cable for the Distributed Management
Chain

To chain hubs together on a Distributed Management Chain, use a
“straight-through” twisted-pair LAN cable. The twisted-pair wires must be
twisted through the entire length of the cable. The wiring sequence must
conform to AT&T 258A (not USOC). See “Twisted-Pair Cable Pin
Assignments” later in this chapter for a listing of the signals used on each pin.

Straight-through cable

blue/white

white/blue

Note Pins 4 and 5 must be wired to a twisted pair.

Pins 1 ,2, 3, 6, 7, and 8 are not used in this application, although they may be
wired in the cable.

The maximum total length of all the extension cables in a chain is 185
meters.

A-5

Cables and Connectors

Cables and Connectors

RS-232 Console Port Connector and Cable Pin-Outs

The hub’s console connector is wired as if it is a terminal (DTE), ready to be
connected to a modem (DCE). The HP AdvanceStack hubs include a null
modem cable that can be used to directly connect a PC to be used as the
console. To connect a modem to the hub, use a standard RS-232-C modem
cable.

This section provides pin assignment information for the cables you can use
on the hub’s RS-232 management console port.

Pin-Out for Hub’s RS-232 Port Connector

PIN US CCITT DIN

1DCD 109M5
2Rx 104D2
3Tx 103D1
4DTR 108S1
5GND 102­6 DSR 107 M1
7RTS 105S2
8CTS 106M2
9RI 125M3

A-6

RS-232-C “Null Modem”Cable

Cables and Connectors

(supplied with the hub)
(for PC with 9-Pin Male Connector)

Cables and Connectors

PC end

9-pin female

1 1 DCD
22Rx
33Tx
44DTR
5 5 GND
6 6 DSR
7 7 RTS
8 8 CTS
99RI

Hub end

9-pin female

3-Wire Cable for Direct Console Connection

PC end

9-pin female

22Rx
33Tx
55GND

Hub end

9-pin female

A-7

Cables and Connectors

RS-232-C Modem Cable

Cables and Connectors

Modem end
25-pin male

23
32Rx
47RTS
58CTS
66
75GND

8 1 CD OR DCD
20 4 DTR
22 9
23 DRS – typically on V.24 (European) modems

Hub end

9-pin male

Signal

Tx

DSR

RI

(not connec ted)

A-8

B

Specifications

Specifications

Physical

HP J2415A 100VG Hub-14

Width:

Depth:

Height:

Weight:

44.2 cm (17.4 in)

32.3 cm (12.7 in)

6.6 cm (2.6 in)

4.3 kg (9.5 lb)

Electrical

(The HP AdvanceStack 100VG Hub-14 automatically adjusts to any voltage between 100-127
and 200-240 volts and either 50 or 60 Hz.)

Specifications

ac voltage:

Maximum current:

Frequency range:

100-127 volts 200-240 volts

0.90 A max 0.60 A max
50/60 Hz 50/ 60 Hz

Environmental

Operating Non-Operating

Temperature:

Relative humidity:

(non-condensing)

Maximum altitude:

+0°C to +55°C
(32°F to 131°F)

15% to 95%
at 40°C (104°F)

4.6 km (15,000 ft) 4.6 km (15,000 ft)

-40°C to 70°C
(-40°F to 158°F)

90%
at 65°C (149°F)

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

B-2

Electromagnetic

Specifications

Emissions

FCC part 15 Class A
CISPR-22 Class A
EN 55022 Class A
VCCI Level I

Immunity

(See the Declaration of Conformity at the end of this guide.)
Complies with Canadian EMC Class A requirements.

Specifications

B-3

Safety and Regulatory Statements

Safety Information

Safety Symbols

Documentation reference symbol. If the product is marked with this symbol, refer to
the product documentation to get more information about the product.

Safety Information

WARNING

CAUTION

A WARNING in the manual denotes a hazard that can cause injury or death.

A CAUTION in the manual denotes a hazard that can damage equipment.

Do not proceed beyond a WARNING or CAUTION notice until you have understood
the hazardous conditions and have taken appropriate steps.

Grounding

These are safety class I products and have protective earthing terminals. There must be an
uninterruptible safety earth ground from the main power source to the product’s input wiring
terminals, power cord, or supplied power cord set. Whenever it is likely that the protection has
been impaired, disconnect the power cord until the ground has been restored.

For LAN cable grounding:

If your LAN covers an area served by more than one power distribution system, be sure

their safety grounds are securely interconnected.

LAN cables may occasionally be subject to hazardous transient voltages (such as lightning
or disturbances in the electrical utilities power grid). Handle exposed metal components of
the network with caution.

Servicing

There are no user-serviceable parts inside these products. Any servicing, adjustment,
maintenance, or repair must be performed only by service-trained personnel.

These products do not have a power switch; they are powered on when the power cord is
plugged in.

2 Safety Information