HP 10BASE-T Reference guide

HP 10BASE-T Reference guide

HP AdvanceStack 10Base-T Hubs

Installation and Reference Guide

©Copyright Hewlett-Packard Company 1995.

All Rights Reserved.

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

Publication Number

5964-4601

Edition 2

October 1995

Printed in Singapore.

Applicable Products

HP J2600A

HP J2601B

HP J2602B

Trademark Credits

MS-DOS® and Microsoft® are U.S. registered trademarks of Microsoft Corporation.

Ethernet is a registered trademark of Xerox

Corporation.

Disclaimer

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 Hewlett-Packard.

Warranty

See the warranty card shrink-wrapped with this manual.

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

HP AdvanceStack 10Base-T Hubs

At A Glance

The HP AdvanceStack 10Base-T hubs are a family of multiport repeaters.

With these hubs, you can connect computers and other devices together in an unshielded twisted-pair cable network. These hubs are compliant with the IEEE 802.3 Type 10Base-T standard and support both 802.3 and Ethernet networks. There are three models in the HP AdvanceStack 10Base-T hub family:

Power

Reset

ThinLAN

Fault

AdvanceStack HP J2600A

Thin LAN Distributed Management

Extension RS-232

Exp Slot

Console

Security

AUI/Xcvr

AUI/Xcvr

Slot

Activity

Collision

In Out

12 11 10 9 8 7 6 5

HP AdvanceStack 10Base-T Hub-12 (HP J2600A)

4 3 2 1

10Base-T

Hub-12

HP AdvanceStack 10Base-T Hub-24 (HP J2601B)

HP AdvanceStack 10Base-T Hub-48 (HP J2602B)

iii

Features

Network Connections

Upgradeable Design

Distributed Management

12, 24, or 48 twisted-pair ports. The 12-port hub has built-in RJ-45 jacks.

The 24-port

and 48-port hubs have industry-standard 50-pin telco connectors that can be fitted with 50-pin/RJ-45 Adapters included with the hubs.

A ThinLAN port (BNC) for connection to a ThinLAN coaxial cable segment.

This port is used to connect hubs together and to connect the hubs to a common network backbone.

The AUI/Xcvr slot for installing one of the HP Transceiver Modules.:

- HP Fiber-Optic Transceiver Module (HP J2606A)—for 10Base-FL

- HP Twisted-Pair Transceiver Module (HP J2607A)—for 10Base-T

- HP ThinLAN Transceiver Module (HP J2608A)—for 10Base2

- HP AUI Port Module (HP J2609A)—to attach external transceivers

Ability to expand the hubs’ capabilities by adding to the Expansion Slot the following optional components:

- HP Ethernet SNMP Module

- HP AdvanceStack Dial-A-LAN 2A/Plus V.34

- HP AdvanceStack Dial-A-LAN 4A

- HP AdvanceStack Router 210 Module

RJ-45 extension ports for “chaining” the HP AdvanceStack hubs together, allowing access to all the hubs in the chain from one RS-232 out-of-band connection into the chain, or from a network management station. The out-of-band control is from a PC running HP Stack Manager or an ASCII terminal or PC emulating an ASCII terminal.

The RS-232 out-of-band management port for attaching a personal computer running the included Windows-based HP Stack Manager software or for controlling the hub from an ASCII terminal or a PC emulating an ASCII terminal.

If the hub has an HP Ethernet SNMP Module installed, this serial connection can also be made through a modem attached to the RS-232 port. The HP Stack

Manager software can also configure, monitor, and diagnose the hub or an entire stack of hubs.

(continued on next page)

iv

Features

(continued)

Modular, Easy-to-Use Design

Reliable Operation

Standards-Based Compatibility

LEDs showing power, activity, collisions, and port status provide quick, easy-to-read hub status information and troubleshooting assistance.

A small footprint that allows you to install the hub in a large variety of ways, including on a desk, under a desk, or on a wall.

Metal brackets (included with the hub) that can be easily attached to the hub for mounting it in a standard 19-inch telco rack or on a wall.

Automatic segmentation (also called auto-partitioning) of ports that are experiencing excessive collision problems. This improves network integrity and aids in fault isolation.

A power supply that automatically adjusts to the voltage range of the ac power being supplied to the hub (90-120 volts or 200-240 volts). No voltage range setting or fuse change is needed.

For the Hub-24 and Hub-48, a power connector for the HP J2962A Redundant

Power Supply (RPS) which will be available at the end of 1995. With the rack-mountable RPS, your hub will receive redundant DC power for increased reliability.

The ability to “hot swap” a hub. Removing a hub connected to other hubs through the built-in ThinLAN connector does not bring down the network; you can upgrade or replace hubs in a stack with the network up and running.

A self-test for fault identification when the hub is powered on or when it is reset. (The hub can be reset from the HP Stack Manager, from a network management station, or by pressing the Reset button.)

Compatible with the IEEE 802.3 Type 10Base-T standard to support both

802.3 and Ethernet networks. v

Front Panel

hub status LEDs and reset button twisted-pair port LEDs

ThinLAN network port

Optional AUI port module installed in AUI/Xcvr slot chain ports RS-232 console port

(for distributed management) twisted-pair ports cable management guide

Back Panel

power connector redundant power connector for the Hub-24 and Hub-48 cover plate over slot for

HP Ethernet SNMP Module vi

Perforate

Perforate

HP Customer Support Services

How to get the latest software/agent firmware

You can download any of the following:

HP AdvanceStack SNMP firmware:

HP Interconnect Manager:

HP Stack Manager asfw.exe

icmupdt.exe

stkmgr.exe

from the HP BBS, HP FTP Library Service, CompuServe, and the World Wide

Web. After you download the file, exact the file by typing

filename

/x

. For example asfw.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 (208) 344-1691 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) Type bin

to set the transfer type.

4) Type cd pub/networking/software

5) Type get filename

to transfer the file to your computer and quit.

CompuServe

1) Login to CompuServe.

2) Type go hpsys

3) Type lib 7

4) Type

download filename

and then quit.

World Wide Web

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

Select the Support section, then Downloads and Patches. Download the file you need and extract it by typing: filename /x

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.

Obtain the latest agent firmware (asfw.exe, icmupdt.exe, stkmgr.exe) from:

HP FTP Library:

World Wide Web: ftp ftp-boi.external.hp.com

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

HP BBS

CompuServe

(208) 344-1691 go hpsys lib 7 download asfw.exe

Perforate

Contents

1 Installing the HP AdvanceStack 10Base-T Hubs

Installation Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Included Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Installation Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

1. Install Add-in Modules (optional) . . . . . . . . . . . . . . . . . 1-3

2. Verify the Hub’s Operation . . . . . . . . . . . . . . . . . . . . . 1-4

3. Mount the Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Mounting the Hub in a Rack or Cabinet . . . . . . . . . . . . . 1-6

Mounting the Hub on a Wall . . . . . . . . . . . . . . . . . . . . 1-10

4. Complete the Network Connections to the Hub . . . . . . . . . 1-11

Connecting Computers and Other Devices . . . . . . . . . . . 1-11

Hub-to-Hub Network Connections . . . . . . . . . . . . . . . . 1-12

Hub-to-Network Backbone Connections . . . . . . . . . . . . 1-13

Network Port Connections . . . . . . . . . . . . . . . . . . . . 1-14

Cable Management . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

5. Connect the Hub to the Distributed Management Console

(optional)

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20

Using a Direct Serial Connection . . . . . . . . . . . . . . . . . 1-21

Using a Modem Connection with HP Stack Manager . . . . . . 1-22

Using the Distributed Management Chain . . . . . . . . . . . . 1-24 vii

viii

Contents

2 Installing and Using HP Stack Manager

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

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

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

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

Communications Settings . . . . . . . . . . . . . . . . . . . . . 2-6

Connect/Disconnect . . . . . . . . . . . . . . . . . . . . . . . . 2-6

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

Online Help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Port Status Display . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

LAN Traffic Statistics . . . . . . . . . . . . . . . . . . . . . . . 2-7

Hub Identification . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Port Enable/Disable . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Port Counters . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Redundant Power Supply (RPS) . . . . . . . . . . . . . . . . . 2-8

HP Stack Manager Advanced Features . . . . . . . . . . . . . . . . . 2-9

Higher-Speed Serial Access . . . . . . . . . . . . . . . . . . . . 2-9

Modem Access for HP Stack Manager . . . . . . . . . . . . . . 2-9

IP Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Password . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Authorized Managers . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Backup Link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Robust Port Control . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Network Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Factory Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Contents

3 Hub Reference

Front and Back Panel Descriptions . . . . . . . . . . . . . . . . . . . 3-2

Front of the hub . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Back of the Hub . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

How the Hubs Work . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Collision Detection . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Auto-Segmentation . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Link Beat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Managing Your Hub —HP Distributed Management . . . . . . . . . 3-8

Chaining the Hubs . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Out-of-Band Management . . . . . . . . . . . . . . . . . . . . . 3-9

In-Band (Network) Management . . . . . . . . . . . . . . . . . 3-9

Security Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Port Security . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Authorized Managers List . . . . . . . . . . . . . . . . . . . . . 3-11

Password Protection . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Optional Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

HP Ethernet SNMP Module . . . . . . . . . . . . . . . . . . . . 3-12

HP Transceiver Modules . . . . . . . . . . . . . . . . . . . . . . 3-14

HP Router Module . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

HP Dial-a-LAN Remote Access Server . . . . . . . . . . . . . . . . . 3-17

HP J2623A Dial-A-LAN 2A/Plus V.34 . . . . . . . . . . . . . . . 3-17

HP J2624A Dial-A-LAN 4A . . . . . . . . . . . . . . . . . . . . . 3-18

Firmware Enhancements . . . . . . . . . . . . . . . . . . . . . . . . 3-19 ix

x

Contents

4 Troubleshooting

Troubleshooting Approaches . . . . . . . . . . . . . . . . . . . . . . 4-2

Diagnosing with the LEDs . . . . . . . . . . . . . . . . . . . . . . . . 4-3

LED Pattern During Self-Test . . . . . . . . . . . . . . . . . . . 4-3

LED Error Indications . . . . . . . . . . . . . . . . . . . . . . . 4-4

Installation Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-6

Incorrect Installation . . . . . . . . . . . . . . . . . . . . . . . . 4-6

ASCII Console Connection Problems . . . . . . . . . . . . . . 4-6

Cabling Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Non-standard Cables . . . . . . . . . . . . . . . . . . . . . . . . 4-7

Topology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

Unusual Network Activity . . . . . . . . . . . . . . . . . . . . . . . . 4-8

IP Configuration Errors . . . . . . . . . . . . . . . . . . . . . . . . . 4-8

Diagnostic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9

Testing the Hub Only . . . . . . . . . . . . . . . . . . . . . . . . 4-9

Testing the Hub’s Ports and the Links . . . . . . . . . . . . . . 4-9

Testing Twisted-Pair Cabling . . . . . . . . . . . . . . . . . . . 4-10

Clearing a Password . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11

Customer Support Services . . . . . . . . . . . . . . . . . . . . . . . 4-12

Hewlett-Packard FTP Library Service . . . . . . . . . . . . . . 4-13

CompuServe . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14

HP FIRST Fax Retrieval Service . . . . . . . . . . . . . . . . . 4-15

HP Network Phone-In Support (NPS) . . . . . . . . . . . . . . 4-15

Contents

A Cables and Connectors

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

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

Twisted-Pair Cable for Hub-to-Computer Network Connection A-4

Twisted-Pair Cable for Hub-to-Hub Distributed Management

Chaining (not a network connection) . . . . . . . . . . . . . . A-5

Twisted-Pair “Crossover” Cable for Hub-to-Hub Network

Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-6

Twisted-Pair Cable Pin Assignments . . . . . . . . . . . . . . . A-7

ThinLAN Cable Requirements . . . . . . . . . . . . . . . . . . . . . . A-7

AUI Cable Minimum Pin-Out . . . . . . . . . . . . . . . . . . . . . . . A-8

Distributed Management RS-232 Connector and Cable Pin-Outs . . A-9

Pin-Out for Hub’s RS-232 Port Connector . . . . . . . . . . . . A-9

RS-232-C “Null Modem” Cable for Direct Console Connection

(supplied with the hub) . . . . . . . . . . . . . . . . . . . . . . A-10

RS-232-C Modem Cable . . . . . . . . . . . . . . . . . . . . . . A-10

B Specifications

C Network Addressing

Communication Between the Hub and Network Management Station C-2

IPX Addressing for Novell NetWare . . . . . . . . . . . . . . . . . . . C-3

IPX Addressing Notes: . . . . . . . . . . . . . . . . . . . . . . . C-3

IP Addresses for IP and Non-IP Networks . . . . . . . . . . . . . . . C-4

Using Assigned IP Addresses . . . . . . . . . . . . . . . . . . . C-4

Building Your Own IP Addressing Scheme . . . . . . . . . . . C-4

Using BOOTP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-6

The BOOTP Process . . . . . . . . . . . . . . . . . . . . . . . . C-6

BOOTP Table File Entries . . . . . . . . . . . . . . . . . . . . . C-6 xi

xii

Contents

D Backup Links

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-2

Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-3

Additional Notes . . . . . . . . . . . . . . . . . . . . . . . . . . D-3

Configuring a Backup Link . . . . . . . . . . . . . . . . . . . . . . . . D-4

Identifying the Backup Link . . . . . . . . . . . . . . . . . . . . . . . D-5

Indications of Backup Link

Activation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-6

Reactivating the Primary Link . . . . . . . . . . . . . . . . . . . . . . D-7

Example Topologies . . . . . . . . . . . . . . . . . . . . . . . . . . . D-8

Example 1: Hub-to-Hub . . . . . . . . . . . . . . . . . . . . . . D-8

Example 2: Backup Link Using Alternative Medium . . . . . . D-9

Safety and Regulatory Statements

Index

1

Installation Summary

Installation Steps

1. Install Add-in Modules

(optional)

2. Verify the Hub’s Operation

3. Mount the Hub

4. Complete the Network Connections to the Hub

5. Connect the Hub to the Distributed Management

Console

(optional)

Installing the HP AdvanceStack

10Base-T Hubs

1-2

Installing the HP AdvanceStack 10Base-T Hubs

Installation Summary

The basic hardware installation procedure for the HP AdvanceStack

10Base-T Hubs is as follows:

1. Install the Ethernet SNMP Module and/or one of the Transceiver

Modules (optional).

2. Verify the hub’s operation.

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

4. Connect the hub to a network or other hubs, and connect computer(s) and/or other device(s) to the hub’s ports.

5. Connect an out-of-band management console to the hub (optional).

Included Parts

Each of the three HP AdvanceStack 10Base-T hubs has the following components shipped with it:

HP Stack Manager Software Kit

HP AdvanceStack 10Base-T Hubs Installation and Reference

Guide

—this manual (5964-4601)

Product Registration Kit

Serial cable for attaching a PC to the out-of-band management port

(5182-4794)

50-pin/RJ-45 Adapters (J2605-61001)—2 supplied with the 24-port hub, 4 with the 48-port hub accessory kit(s)—accessories vary with hub model purchased:

• the 5063-4251 kit (shipped with all hub models):

– two mounting brackets

– two cable ties

– four 3/8-inch M4 machine screws

– four 5/8-inch number 12-24 screws

• the 5063-4252 kit (shipped with the 24-port and 48-port hubs):

– four telco hooks

– four telco hook screws

(continued on next page)

Installing the HP AdvanceStack 10Base-T Hubs

Power cord, one of the following:

Australia/New Zealand (8120-6175)

Denmark (8120-6178)

Europe (8120-6174)

Switzerland (8120-6179)

Japan (8120-6176)

United Kingdom (8120-6173)

United States/Canada (8120-6177)

Installation Steps

1. Install Add-in Modules (optional)

The HP AdvanceStack 10Base-T Hubs can be custom-configured by installing an optional Ethernet SNMP Module and/or an HP Transceiver

Module. If you intend to install any of these optional modules, refer to the documentation that was shipped with it.

It may be more convenient to install these optional modules before installing the hub in a rack or other location. Inspect your installation site and identify whether the hub’s module slots will be accessible.

1-3

Installing the HP AdvanceStack 10Base-T Hubs

2. Verify the Hub’s Operation

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-24.

C a u t i o n

N o t e

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

The hub does not have a power switch; it is powered on when the power cord is plugged in. The hub’s power supply automatically adjusts to any ac power source between 90 and 240 volts. You do not have to set the voltage range.

2.

Check the LEDs on the hub’s front panel.

When the hub is powered on, it performs a self-diagnostic test during which time all the LEDs are lit.

For a hub without an optional SNMP Module installed, the selftest takes approximately 3 seconds.

For a hub with an SNMP Module, the self-test takes up to 60 seconds. While the SNMP Module is being tested, the Activity,

Collision, and RPS LEDs are not lit (or flickering if there is network traffic on the hub) and the Exp Slot LED flashes slowly.

At the end of the self-test, a correctly operating hub keeps the Power

LED on, the Fault LED will be off, and, if an SNMP Module is installed, the Exp Slot LED will stay lit. If an RPS is connected, the

RPS LED stays on.

3.

Unplug the hub.

1-4

Installing the HP AdvanceStack 10Base-T Hubs

3. Mount the Hub

M o u n t i n g

P r e c a u t i o n s :

The HP AdvanceStack hubs can be mounted in three ways: in a rack or cabinet on a wall on a table

The hardware for mounting the hub is included in the Accessory 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 Accessory Kit.

To mount a hub in a rack or on a wall, you will need a Phillips

(cross-head) number 1 screwdriver.

To locate 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 ports that will be used. If you use the cable guide bar on the right side of the hub’s front, make room for the grouped cables to trail out from the right side of the hub.

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 ampere 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.

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 HP AdvanceStack hub in an environment where the operating ambient temperature might exceed 55

°

C (131

°

F).

Make sure the air flow around the sides of the hub is not restricted.

1-5

Installing the HP AdvanceStack 10Base-T Hubs

Mounting the Hub in a Rack or Cabinet

Note that the rack or cabinet should be adequately secured to prevent it from falling over.

align top of bracket with top of hub

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.

10-mm M4 screws

1-6

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 a rack mounting; it provides the most well balanced position for the hub.

Installing the HP AdvanceStack 10Base-T Hubs

I m p o r t a n t

N o t e

Steps 2 through 4 below apply to mounting a single hub or the first of multiple hubs in a rack. The mounting brackets are designed to make it easy to install this first hub, and once it is installed correctly, to easily install subsequent hubs by placing them on top, one at a time, and then securing them to the rack.

To make the process easy, it is important to get the first hub located correctly.

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 put 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 EIAstandard 19" 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 repeats with vertical pairs of the holes being close together.

Insert these first screws in the upper hole of one of these close pairs, as shown in the illustration.

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

One upright of an EIA

19-inch telco rack

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Installing the HP AdvanceStack 10Base-T Hubs

3. Place the hub in the rack and lower it so the notches in the bottom of the bracket slide onto the two 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. Be careful not to overtighten these screws.

Install additional screw

Continued on the next page.

Installing the HP AdvanceStack 10Base-T Hubs

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 show in the illustration below.

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

To assist you, a single hash mark is located by one notch/hole pair and a double hash mark is located by the other pair on the bracket.

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Installing the HP AdvanceStack 10Base-T Hubs

Mounting the Hub on a Wall

I m p o r t a n t

Bracket mounting position for flat mounting on a wall.

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 with 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 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.

10-mm M4 screws

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Installing the HP AdvanceStack 10Base-T Hubs

4. Complete the Network Connections

to the Hub

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

. (For the Hub-24 and Hub-48, see the documentation accompanying the Redundant Power Supply if you are using redundant power.) Typical hub connections are to: network devices such as computers, and printers a network backbone another HP AdvanceStack 10Base-T Hub, or other Ethernet hub

Some examples of connections that can be made to your hub are shown below. Specific details about connecting your network cabling to the hub’s ports are included later in this chapter.

Connecting Computers and Other Devices

Devices connected to the hub’s

50-pin telco connector through a cross-connect block

Devices connected directly to a

50-pin/RJ-45 adapter on the hub

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Installing the HP AdvanceStack 10Base-T Hubs

Hub-to-Hub Network Connections

The HP AdvanceStack 10Base-T Hubs can be connected together using any of the hub’s network ports.

It is strongly recommended that you use the built-in ThinLAN (BNC) port for connecting hubs together.

By using that port, up to 30 hubs can be connected together on a common

ThinLAN segment, and a computer at one end of that segment can communicate with a computer all the way at the other end of the segment. By using the built-in BNC port, the maximum the repeater hop-count increment through the entire segment is only two.

See the

Designing HP AdvanceStack Workgroup Networks

guide for information on valid network topologies.

ThinLAN Port to ThinLAN Port

ThinLAN coax connecting the hubs together

Twisted-Pair to Twisted-Pair Port – “Cascading”

twisted-pair cable with Tx and Rx pairs reversed*

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*In a twisted-pair cable connection between hubs, Tx and Rx pairs must be reversed. You can use the HP 92214W Crossover cable with inline adapter to reverse the pairs. See appendix A, “Cables and Connectors”, for more information.

ThinLAN coax backbone

Installing the HP AdvanceStack 10Base-T Hubs

Hub-to-Network Backbone Connections

A single HP AdvanceStack 10Base-T Hub or a stack of hubs can be connected to a network backbone. These examples show connection to ThinLAN and fiber-optic backbones.

Connecting to a ThinLAN Backbone

Connecting to a Fiber-Optic Backbone

fiber-optic cable

Reset

Power

ThinLAN

Fault

AdvanceStack HP J2600A

Thin LAN Distributed Management

Extension RS-232

Exp Slot

Console

Security

AUI/Xcvr

Activity

Collision

In Out

HP Fiber-Optic

Transceiver Module (HP J2606A)

12 11 10 9 8 7 6 5 4 3 2 1

10Base-T

Hub-12

Reset

Power

ThinLAN

Fault

AdvanceStack HP J2600A

Thin LAN

E t

Distributed Management i RS 232

Exp Slot

Console

Security

AUI/Xcvr

Activity

Collision

12 11 10 9 8 7 6 5 4 3 2 1

10Base-T

Hub-12

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Installing the HP AdvanceStack 10Base-T Hubs

Network Port Connections

The HP AdvanceStack 10Base-T Hubs have the following network ports: twisted-pair

ThinLAN (BNC)

AUI/Xcvr Slot

This section describes how to connect cables to these ports.

Twisted-pair Connections

Twisted-pair connections can be made through the 12-port hub’s built-in

RJ-45 jacks and the 24 and 48-port hubs’ 50-pin telco connectors, used either directly or with a 50-pin/RJ-45 Adapter (J2605-61001).

50-pin telco connector

Using the 50-pin/RJ-45 Adapter:

To install the 50-pin/RJ-45 Adapter

(J2605-61001) on the 24 and 48-port hubs’ telco connectors: slot in the hub

1. Insert the hook on the back of the adapter into the slot on the hub’s face. insert hook in slot press adapter onto telco connector secure adapter with thumb screw

2. Pivot the adapter and press it onto the telco connector.

3. Make sure the hook is in the hub’s slot, then secure the adapter to the hub using the thumb screw.

Do not overtighten the screw

.

Installing the HP AdvanceStack 10Base-T Hubs

Using RJ-45 Connectors:

Push the RJ-45 plug into the RJ-45 jack until the tab on the plug clicks into place.

B

12 11 10 9 8 7 6 5 4 3 2 1

B

10Base-T

Hub-24

12 10 8 6 4 2

11 9 7 5 3 1

RJ-45 plug unshielded twisted-pair cable

To disconnect an RJ-45 plug, press the small tab on the plug and, holding it up, pull the plug out of the jack.

Using Telco Connectors:

If you prefer to make your twisted-pair connections through a cross-connect block, wiring closet, or other intermediary connection, the HP J2601B (24-port) and HP J2602B

(48-port) hubs have industry-standard 50-pin telco connectors.

To use a telco connector:

1. Attach the mounting hook included in the Accessory Kit (5063-4252) to the threaded hole on the back of the telco plug. Be careful not to overtighten the screw holding the hook.

50-pin telco plug mounting hook

1/2-in 4-40 screw

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Installing the HP AdvanceStack 10Base-T Hubs

2. Insert the hook into the slot on the hub’s face.

insert hook in slot press telco plug onto connector secure plug with attached screw

3. Pivot the telco plug onto the 50-pin telco connector and press it into place.

4. Make sure the mounting hook is in the hub’s slot, then secure the telco plug to the hub by tightening the screw on the telco plug into the hole on the hub.

Be careful not to overtighten the screw.

To remove a telco connector, reverse this process.

If you are using a mixture of 50-pin/RJ-45 Adapters and right-angle

50-pin connectors on an HP AdvanceStack 10Base-T Hub, position the

Adapters to the left of the right-angle 50-pin connectors.

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Installing the HP AdvanceStack 10Base-T Hubs

ThinLAN Connections

To connect a ThinLAN cable to the hub’s ThinLAN port:

1. Attach a ThinLAN cable section to one side of a BNC “T” connector.

(Hewlett-Packard offers BNC “T” connectors with insulating covers.

Order product number HP 92227A.)

2. Attach another ThinLAN cable section

or

a 50-ohm terminator to the other side of the “T” connector.

3. Attach the “T” connector to the ThinLAN port.

OR

ThinLAN cable

50-ohm terminator

BNC “T” connector

ThinLAN cable

4. Cover the BNC connector with an insulating cover.

To remove a ThinLAN cable, reverse this process.

Each ThinLAN cable segment must be terminated using a 50-ohm terminator at each end. In the illustration above, a 50-ohm terminator would be placed on one side of the BNC “T” connector if that connector is at the end of the cable segment.

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Installing the HP AdvanceStack 10Base-T Hubs

AUI/Xcvr Slot

Optional transceiver modules can be installed in the hubs’ AUI/Xcvr slot to provide additional connectivity choices, including:

HP Fiber-Optic Transceiver Module (HP J2606A)—for 10Base-FL

HP Twisted-Pair Transceiver Module (HP J2607A)—for 10Base-T

HP ThinLAN Transceiver Module (HP J2608A)—for 10Base2

HP AUI Port Module (HP J2609A)—to attach external transceivers

See the documentation accompanying the optional transceiver modules for cabling configurations for those modules.

In order to use an external transceiver with an HP AdvanceStack

10Base-T Hub, the SQE Test and Loopback Test options, if present, must be disabled on the transceiver.

Transceivers that cannot disable these tests cannot be used with the HP AdvanceStack 10Base-T Hubs

.

An HP 28641A ThinMAU does not meet this requirement and cannot be used. Use an HP 28641B ThinLAN transceiver instead.

Similarly, an HP 30241A ThickMAU with a date code D-3017 or earlier cannot be used. (The date code is found on a small white sticker on the body of the device. Lower numbers indicate an earlier manufacturing date.) Instead, use an HP 30241A with date code F-3105 or later and follow the instructions included with the ThickMAU for disabling the

SQE Test.

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Installing the HP AdvanceStack 10Base-T Hubs

Cable Management

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

cable management bars

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 cable ties that allow you to wrap the cables and then attach the bundle to the cable management bar, as shown in the illustration below.

specialized cable tie

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

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Installing the HP AdvanceStack 10Base-T Hubs

5. Connect the Hub to the Distributed

Management Console

(optional)

The HP AdvanceStack hubs can be controlled in two ways: from a PC running the HP Stack Manager software that is supplied with the hubs from an ASCII terminal or PC running a terminal emulation (requires an HP Ethernet SNMP Module to be installed in the hub or in one of the hubs in the distributed management chain)

The PC serves as a console for an out-of-band management session that enables you to configure, monitor, and diagnose one hub or a stack of up to 16 hubs that are chained together. The HP Stack Manager software is described in chapter 2, “Installing and Using HP Stack Manager”.

With the HP Ethernet SNMP Module, the module’s console is also used to configure, monitor, and diagnose one hub or a stack of up to 16 hubs that are chained together. You can access the console through a terminal emulator on your PC or through a terminal.

There are three ways to access a hub: through a direct serial connection through a modem connection (available for HP Stack Manager or

ASCII terminal only if an HP J6203 Ethernet SNMP Module is installed in the hub to which the modem is connected) through the distributed management chain

Installing the HP AdvanceStack 10Base-T Hubs

Using a Direct Serial Connection

The out-of-band management port on the hub is a 9-pin serial (RS-232-C) port used to connect the hub to the personal computer or terminal.

Note that you must have an HP Ethernet SNMP Module installed in the hub to use the ASCII console.

To connect to the PC or terminal through the out-of-band management port:

1. Attach the console cable (5182-4794) supplied with the hub to the out-of-band management 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 or 25-pin serial port on the terminal. If only a

25-pin serial port is available, use a 9-pin-to-25-pin port adapter

(not supplied).

serial cable for connecting a PC or terminal to the console port

(p/n 5182-4794)

PC running

HP Stack Manager or a terminal emulator

2. For HP Stack Manager, define the out-of-band port’s data communication settings using the “Communications Settings” function in

HP Stack Manager. See the HP Stack Manager online help for more information.

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3. For a hub with an SNMP module and the RS-232 cable connected to a terminal, switch on the terminal’s power (or switch on the PC’s power and start the terminal emulation program). Configure the terminal for 8 bits per character, 1 stop bit, no parity, Xon/Xoff handshaking, and a baud rate of 38400, 19200, 9600, 4800, 2400, or 1200.

4. For a terminal, press return several times for the prompt, =>. The baud rate for communication between the hub and the terminal is set automatically when you press [Return] .

Using a Modem Connection with HP Stack

Manager

(To set up a modem connection with the ASCII console, see chapter 2 in the manual accompanying the Ethernet SNMP Module.)

This option requires that an HP Ethernet SNMP Module (HP J2603A or

B) be installed in the hub to which you are connecting the modem.

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

The modems that have been tested for use with the HP AdvanceStack hubs are all 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.

The basic steps to connect the hub to HP Stack Manager with a modem link are:

1. Connect the modem that will be used on the hub to your PC’s serial port and configure the modem by using the “Remote Modem” initialization screen from the “Settings” menu in HP Stack Manager.

2. Connect the remote modem to the RS-232 port on the front 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.

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Installing the HP AdvanceStack 10Base-T Hubs

3. Connect the “local modem” to the serial port on your PC or install it in the PC if it is an internal modem, and configure that modem by using the “Local Modem” initialization screen in HP Stack Manager.

4. From the “Communications” screen under the “Settings” menu, click on the Modem button and enter the phone number of the remote modem.

5. 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.

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Installing the HP AdvanceStack 10Base-T Hubs

Using the Distributed Management Chain

It is not necessary for each hub in a chain to be connected to the computer that is running HP Stack Manager or an ASCII terminal. When you have “chained” several hubs together through their Extension ports, only one of the chained hubs needs to have a connection to the computer. As described earlier, the connection can be either directly through a serial cable, or remotely through a modem link.

Once the HP Stack Manager program or the ASCII terminal is started and the connection is made to the stack, all the hubs in the chain are automatically discovered and displayed by the HP Stack Manager. On the ASCII console, the list of hubs is displayed by the CHainlist command. You are then able to use either interface program to configure, monitor, and diagnose other hubs in the chain.

The chain can extend up to

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

PC connected by a serial cable or modem link to one of the hubs in the chain twisted-pair cables forming the chain

Hubs are chained together by connecting them through the Extension ports on the front of the hub using standard “straight-through” 10Base-T twisted-pair cables.

This “chained” connection is independent of any network connections between hubs.

A maximum of 16 hubs can be chained together in a single chain. The maximum total length of the twisted-pair cable segments in the chain should not exceed 185 meters.

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

2-2

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.

The HP AdvanceStack hubs can be controlled from an ASCII terminal or terminal emulation program but this requires that the hub (or one of the hubs in the stack) have an HP Ethernet SNMP Module installed. See the

HP Ethernet SNMP Module manual for more information on using the

ASCII console.

Software Description

The HP Stack Manager is a Windows-based software application, included with each HP AdvanceStack hub, that serves as the console for the hubs. It is included with the hubs. It enables you to configure, monitor, and diagnose your hub from a PC connected to the hub through a direct serial link or a remote modem link. With the HP Stack Manager software, you can also configure and monitor any HP AdvanceStack hub that is “chained” to that hub via the Distributed Management Extension

(In/Out) ports.

(Connecting a hub to a console and “chaining” the hubs is described in chapter 1, “Installing the HP AdvanceStack 10Base-T Hubs”.)

HP Stack Manager provides basic management functions for all the

HP AdvanceStack hubs. If a hub has an HP Ethernet SNMP Module installed, the advanced features, described later in this chapter, are available for that hub.

For extended management capabilities, HP Interconnect Manager is an

SNMP-compliant network management program that can manage HP

AdvanceStack hubs from any network management station on the network.

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)

80386 (or higher) processor

4 Mbytes of RAM

2 Mbytes of available hard disk space a 3-1/2" 1.44 Mbyte floppy disk drive an available RS-232 (serial) port or modem a VGA monitor

You will also need the following equipment to connect the PC to the hub: a serial cable (included with hub) to connect the PC directly to the hub, or two modems (if connecting through a modem link) and a standard modem cable to connect the modem to the hub. The cable included with the hub will not work as a modem cable.

See appendix A, “Cables and Connectors” for details on appropriate cables. Connecting the hub and the PC (or modem) is described in detail in chapter 1, “Installing the HP AdvanceStack 10Base-T Hubs”.

10Base-T twisted-pair cables (if you have multiple hubs that you are chaining together).

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Installing and Using HP Stack Manager

Installing and Starting

HP Stack Manager

To install the HP Stack Manager software:

1. With Windows running, insert the floppy diskette into your computer’s diskette drive.

2. Select the

Run

option from the Program Manager

File

menu.

3. Type the following into the command line entry field:

[drive] :\setup

where [drive] is the letter designating your diskette drive. For example, “b:\setup”.

The HP Stack Manager installation program will start.

4. Select the directory where you want to store your HP Stack Manager files by accepting the default directory that is displayed for you or typing over the default entry with the name of the directory you desire.

The installation program will install the software in the specified directory and create an HP Stack Manager program group and icon in Windows Program Manager.

5. To start the HP Stack Manager, open the HP Stack Manager group in the Program Manager and double-click the HP Stack Manager icon.

The Main window of the HP Stack Manager is displayed.

Installing and Using HP Stack Manager

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

Specific information about the HP Stack Manager software is included in the online help that accompanies the software. This chapter describes the general capabilities of the HP Stack Manager 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 on each of the screens where help is available.

HP Stack Manager Basic Features

The HP Stack Manager’s basic features are available on each of the three

AdvanceStack 10Base-T Hubs. They include:

Communications settings

Connect/disconnect

Automatic chain display

Online help

Port status display

LAN traffic statistics

Hub identification

Port counters

(continued on next page)

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Installing and Using HP Stack Manager

Port enable/disable

Reset

Redundant Power Supply (RPS) status (for the Hub-24 and Hub-48)

There is also an extended set of features available only to hubs that have an HP J2603A or B Ethernet SNMP Module installed. These are described later in this chapter under “Advanced Features”. Features not available to your hub will be “grayed out” on the HP Stack Manager menus and/or any associated buttons will not be displayed.

A description of each basic feature follows. For specific information about how to use a feature, consult the online help system.

Communications Settings

This function is accessed through the “Settings” menu on the HP Stack

Manager main screen. Use this function to define the settings for the serial communication between the hub and the PC running HP Stack

Manager.

If the hub to which the serial connection is being made does not have the HP Ethernet SNMP Module installed, this connection can be only a direct connection at 9600 baud. If the hub has the module installed, the connection can be direct or through a modem and at a wide range of baud rates. These expanded connection capabilities are described later under “HP Stack Manager Advanced Features”. The communications settings can be stored in an individual file for each serial connection.

See the HP Stack Manager online help for more information.

Connect/Disconnect

These functions are accessed through the “Connect” and “Disconnect” buttons on the HP Stack Manager main screen. Use this function to establish a connection to the hub from the PC as defined by the current communications settings.

Installing and Using HP Stack Manager

Automatic Chain Display

The Chain Display window displays a list of HP AdvanceStack hubs that

HP Stack Manager detects in the chain to which you have connected.

Information about each hub is shown including the hub model and its station address. From this window you can access any of the hubs in the chain and, if you so desire, monitor it and/or change its configuration.

Online Help

HP Stack Manager provides an online help system that has step-by-step instructions for using the program’s features. The help system can be accessed from the main menu, or from a Help button on each of the function screens.

Port Status Display

The Port Status display is a graphical representation of the front of the hub. This display is accessed when you “double-click” on the hub listed in the Chain Display window, or when you click on the hub and then click on the Access button. In the display, the colors and symbols for each port indicate its status. You can select the port you wish to monitor or control by clicking on the symbol for that port.

LAN Traffic Statistics

The graphical hub display includes two bar graphs that indicate network activity and collision levels that the hub is experiencing.

Hub Identification

The Identify function displays general information about the currently selected hub. Access this information by clicking on the ID icon.

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Installing and Using HP Stack Manager

Port Enable/Disable

This function turns the port selected on the Port Status display on or off.

Port Counters

The Port Counters function displays summary tables of several counters that are useful in diagnosing problem conditions on the hub’s ports.

Counter values are displayed for each of the hub’s network ports. See the HP Stack Manager online help for counter descriptions.

Reset

The Reset function performs the start-up self-test on the hub. The process resets and tests the hub hardware, and changes the port counter values to zero. The hub’s configuration information remains unchanged.

This function temporarily (approximately 3 seconds) interrupts the hub’s repeater operation, but this will normally not have an effect on the network connections or operation. (This option has the same effect as pressing the Reset button on the front of the hub or cycling power on the hub.)

When you perform a reset, your HP Stack Manager session with that hub will be terminated. If you reset the hub to which the serial connection

(direct cable or modem link) is made, the connection between the PC running HP Stack Manager and the hub will be terminated; you will have to reestablish the connection to access the hub or stack of hubs. If you reset one of the other hubs in the chain (not the one connected to the serial connection), the HP Stack Manager session will continue but access to that hub will be lost. You will have to click on the Refresh button so that HP Stack Manager can “rediscover” that hub before you can access that hub again.

Redundant Power Supply (RPS)

For the Hub-24 and Hub-48, the status of the Redundant Power Supply is shown in the lower right corner of HP Stack Manager. The Redundant

Power Supply is either connected, disconnected, or has an internal error.

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Installing and Using HP Stack Manager

HP Stack Manager

Advanced Features

In addition to the basic features described earlier in this chapter, the following HP Stack Manager advanced features are available on hubs that have an HP J2603A or B Ethernet SNMP Module installed:

Higher-speed serial access

Modem access for HP Stack Manager

IP configuration

Password

Authorized managers

Backup link

Robust Capabilities

Network test

Factory default reset

A description of each extended feature follows below. For specific information about how to use a feature, consult the online Help system.

Higher-Speed Serial Access

When you install an HP Ethernet SNMP Module in your hub, additional baud rates that are higher than the default of 9600 can be used to connect the PC running HP Stack Manager to the hub. See the HP Stack

Manager online help for more information.

Modem Access for HP Stack Manager

When you install an HP Ethernet SNMP Module in your hub, the serial connection between the PC running HP Stack Manager and the hub can be through a modem connection. HP Stack Manager helps you automatically configure the two modems that will be attached to the hub and to your PC. See the HP Stack Manager online help for more information.

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IP Configuration

The IP Configuration window is used to define the parameters necessary for the hub to communicate with a network management station using the TCP/IP network protocol.

The hub’s default configuration causes the hub to retrieve this information automatically from an IP server using the Bootstrap

Protocol (BOOTP). The Novell NetWare IPX protocol is also enabled on the hub by default, so the hub can automatically communicate with a network management station using IPX/SNX.

If you are configuring your hub to communicate with a network management station using TCP/IP and you do not have a BOOTP server set up, use this screen to manually configure the hub’s IP address and other IP configuration parameters.

See appendix C, “Network Addressing”, for more information.

Password

The Password function is used to establish password protection for access to the hub from the serial port and from SNMP management stations. Once a password is configured, it is also used as the SNMP community name for network management access to the hub.

The password is stored on the hub that has the HP Ethernet SNMP

Module installed in it. For password protection on the serial connection to your hub or stack of hubs, you must connect the serial cable or modem to the hub that has the SNMP Module installed. If the serial connection is to one of the hubs in the stack that does not have the

SNMP Module installed, the password does not prevent access through that serial connection; although, network management access is still password protected. To provide optimal security, you should also install your hub(s) in a locked space.

It is possible to clear the password if you forget it. See “Clearing the

Password” in chapter 4, “Troubleshooting”.

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Installing and Using HP Stack Manager

Authorized Managers

The Authorized Managers window is used to specify the IP or IPX network addresses of SNMP management stations authorized to manage this hub and which of the stations should receive SNMP event alarms.

Backup Link

The Backup Link window is used to specify two of the hub’s network ports (AUI, ThinLAN, or twisted-pair) to be used in a backup

(redundant) connection to another hub. It enables you to connect a second physical link between hubs that will work if the first link fails.

The backup link is used only in the event of primary link failure, thus eliminating the possibility of loops in the network.

See appendix D, “Backup Links” for more information.

Robust Port Control

The Robust Port Control window allows you to invoke options to improve the hub’s ability to tolerate network problems resulting from excessive collisions. The configurable options are:

Intelligent Segmentation Recovery

Late Collision Monitoring

These features are described in chapter 3, “Hub Reference”, under

“Auto-Segmentation”. See the HP Stack Manager online help for information on how to invoke these features, and when it is appropriate to do so.

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Installing and Using HP Stack Manager

Network Tests

The Network Tests window enables you to perform Ping, IPX, and Link network tests. These tests are used to verify the connection between the hub and a specified network device. The devices tested must support the test(s) by being able to send the appropriate response packets.

HP AdvanceStack 10Base-T hubs support all of these tests.

The Ping test sends Internet Control Message Protocol (ICMP) Echo

Request (“ping”) packets to another node with the specified IP address and waits for Echo Response packets in return.

The IPX test sends IPX test packets to the specified IPX device and waits for an IPX test packet in return.

The Link test sends IEEE 802.2 Test command packets and waits for an

IEEE 802.2 Test response packet in return.

Factory Reset

When you install an HP Ethernet SNMP Module in your hub, the Reset function in HP Stack Manager offers an additional reset option, Factory

Reset. A factory reset resets the hub’s configuration, except the IP configuration, to the factory default values. The factory reset also causes the hub to perform its self-test, and then causes the results listed below: all network ports are enabled link beat is enabled for all the 10Base-T twisted-pair ports hub counters are reset to zero a configured password is deleted

the system name, system location, and system contact are deleted

Thinwatch is disabled the authorized managers list is cleared and the configuration is reset to "Allow management from any address” any backup link configuration is cleared; both ports are returned to the enabled state the Robust Port Control features are disabled the IP configuration is not changed any security configuration is cleared

3

Front and Back Panel Descriptions

How the Hubs Work

Managing Your Hub — HP Distributed Management

Optional Accessories

Firmware Enhancements

Hub Reference

Hub Reference

Front and Back Panel Descriptions

Front Panel

The 24-port hub is shown; the 12-port and 48-port hubs are essentially the same.

hub status LEDs and reset button twisted-pair port LEDs

ThinLAN network port

Optional AUI port module installed in AUI/Xcvr slot chain ports RS-232 console port

(for distributed management)

Back Panel

power connector twisted-pair ports cable management guide redundant power connector cover plate over slot for HP Ethernet SNMP Module

3-2

Hub Reference

Front of the hub

Status LEDs

The Status LEDs indicate whether the hub is functioning properly or not. For further details on error conditions indicated by the

Status LEDs, see chapter 4, “Troubleshooting”.

LED

Power (green)

ExpSlot (green)

Security (orange)

(functional only if an HP Ethernet

SNMP Module is installed in the hub)

State

On

Off

On

Off

Flashing slowly

Off

Flashing rapidly

Meaning

The hub is receiving power.

The hub is not receiving power.

An optional HP SNMP Module is properly installed in the hub’s back panel slot.

An SNMP Module is not installed.

The SNMP Module is being self-tested (after hub power on or a reset). If this state continues for more than 25 seconds, see chapter 4, “Troubleshooting”.

The normal state.

A security violation has occurred on one or more of the network ports, or an unauthorized network management station has attempted to access the hub.

If a port security violation has occurred, the corresponding port LED will flash at the same time and rate as the Security LED.

Activity (green)

Fault (orange)

Console (green)

RPS (green)

Network management authorization is performed through the Authorized Managers function of HP Stack Manager, and the port security configuration is performed through HP Interconnect Manager. See “Security Features” later in this chapter.

Flickering ON while a packet is being transmitted. Normally, the LED appears to flicker. In heavy traffic, it may appear on all the time.

Off

On

Flashing slowly

On

On

The normal state. Indicates that there are no fault conditions on the hub.

The hub has failed its self-test after being powered on or reset.

A port has been auto-segmented or the Redundant Power Supply has experienced a failure. The corresponding port or RPS LED will also be flashing slowly.

This hub is currently being accessed by HP Stack Manager, ASCII terminal, or Telnet.

This hub is receiving power from the connected HP J2962A Redundant Power

Supply or RPS (available at the end of 1995).

Off

Flashing

Slowly

This hub is not receiving power from the RPS.

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

Collision (orange)

Flickering This LED is on while a collision is detected on any of the attached cable segments. If collisions are infrequent (which is normal) the light may be imperceptible. In a network with heavy traffic, the LED will glow and flicker dimly, indicating collisions are occurring. If it appears on continuously (with no flicker), it is a possible indicator of a network fault. See chapter 4, “Troubleshooting”.

3-3

Hub Reference

Port LEDs (green)

There is an LED associated with each network port on the hub, twisted-pair, the AUI/Xcvr port, and the ThinLAN port.

Each port LED indicates the status of the port associated with it.

Port Type

Twisted-pair

ThinLAN

LED State

On

Meaning

Link beat is detected from the attached node.

Off The port is not receiving the link beat signal from the attached node.

Flashing

Slowly *

The port has been auto-segmented. The Fault LED will also be flashing at the same rate.

See “Auto-Segmentation” later in this chapter.

Flashing

Rapidly **

The port has experienced a security violation. The Security LED will also be flashing at the same rate. See “Security Features” later in this chapter.

On – The port is enabled and it is not auto-segmented.

Off

Flashing slowly *

EITHER:

– The port has been disabled through HP Stack Manager or a network management

station, OR,

– Thinwatch is disabled (the default setting) and the port is auto-segmented

because of an excessive collision condition. The default setting for Thinwatch is

“disabled”–Thinwatch can be enabled through HP Interconnect Manager or the

ASCII console interface with the HP Ethernet SNMP Module.

The port has been auto-segmented and Thinwatch is enabled. The Fault LED will also be flashing at the same rate. See “Auto-Segmentation” later in this chapter.

AUI / Xcvr

Flashing

Rapidly **

The port has experienced a security violation. The Security LED will also be flashing at the same rate. See “Security Features” later in this chapter.

On

Off

The AUI/Xcvr port is enabled and not segmented. (This LED will always be on under these conditions, even if this port is not being used.)

The port has been disabled through HP Stack Manager or a network management station.

Flashing slowly *

The port has been auto-segmented. The Fault LED will also be flashing at the same rate.

See “Auto-Segmentation” later in this chapter.

Flashing

Rapidly **

The port has experienced a security violation. The Security LED will also be flashing at the same rate. See “Security Features” later in this chapter.

* The slow flash rate is approximately once each 1.5 seconds.

** The rapid flash rate is approximately 3 times each second. This condition can exist only if an SNMP Module is installed in the hub.

Reset Button

The Reset button resets the hub and performs the power-on self-test. It is recessed to prevent accidental resets. Use a pen point or straightened paper clip to depress the button. For a description of the effect of this reset, see “Resetting the Hub” in chapter 4, “Troubleshooting”.

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Hub Reference

Back of the Hub

Expansion Slot

The Expansion Slot is used to add an HP Ethernet SNMP Module

(HP J2603A or B). See the “Optional Accessories” section later in this chapter for more information on the HP Ethernet SNMP Module.

Redundant Power Supply Connector

The back of the Hub-24 and Hub-48 has a Redundant Power Supply

(RPS) connector to add the HP J2962A Redundant Power Supply.

How the Hubs Work

The HP AdvanceStack 10Base-T Hubs are multiport repeaters that conform to the IEEE 802.3 repeater specification. Data signals coming into the hub from any of its ports are automatically regenerated and transmitted to all the other hub network ports. The hub regenerates the data without interpreting the contents, so it can be used in either IEEE

802.3 or Ethernet networks and with any upper-level protocol.

Collision Detection

The hub also performs collision detection. A collision occurs when two nodes try to transmit at the same time. When the hub detects this, it stops repeating the colliding transmissions and starts transmitting a jamming signal. The jamming signal tells the transmitting nodes that a collision has occurred. The colliding nodes then stop transmitting for a random amount of time before attempting to retransmit the data. Once the collision condition is removed, the hub stops transmitting the jamming signal and normal operation is resumed.

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3-6

Hub Reference

Auto-Segmentation

The Basic Feature

The hub will automatically segment (temporarily disable) a network port if a collision condition exists for an excessive duration (between

1024 and 2048 bit times) or occurs during each of 32 consecutive attempts to transmit. The hub monitors the segmented port and automatically re-enables the port when a minimum length packet can be successfully transmitted or received without a collision occurring.

Excessive collisions may be caused by faulty wiring. If a port’s transmit

(Tx +/-) wires have been shorted to the receive (Rx +/-) wires of any port, a collision will be detected when that port attempts to transmit. If a port’s receive (Rx +/-) wires are not connected properly, collisions may occur because the hub cannot detect the presence of network traffic on that port and may thus transmit at inappropriate times.

A port may occasionally also become segmented when network traffic is extremely heavy causing an abnormally high collision rate.

Intelligent Segmentation Recovery

(Available on hubs with the HP Ethernet SNMP Module)

Intelligent Segmentation Recovery makes it more difficult for a problem port to automatically re-enable itself to send traffic on the network. For a port configured with Intelligent Segmentation Recovery, once it has been disabled due to extended or excessive collisions, it will be automatically re-enabled only when it is able to

transmit

a minimum length packet without a collision condition occurring. This feature prevents a port from re-enabling itself when it just receives traffic from the attached node or when it receives reflected noise or crosstalk caused by faulty wiring.

The Intelligent Segmentation Recovery feature is enabled through the

“Robust” function in HP Stack Manager or the RObustness command in the ASCII console interface. The default setting is OFF.

Late Collision Monitoring

(Available on hubs with the HP Ethernet SNMP Module)

When this feature is enabled, the hub will automatically disable (turn off) a network port when persistent late collisions are detected on that port.

N o t e

Hub Reference

Late collisions occur when a node starts transmitting after another node has already transmitted at least 512 bits. They are usually caused when network topology rules (such as cable length limitations or hub hop counts) do not meet the IEEE 802.3 specifications. Late collisions may also be caused by faulty wiring that prevents a hub from being able to detect traffic on a network port.

Because failures due to late collisions are the result of critical network design errors or cabling errors, the hub will

not

automatically re-enable the port. You must manually re-enable the port (after the problem is resolved) either through the HP Stack Manager’s “Port” function or an

SNMP network management station.

Late Collision Monitoring is configurable for either single node connections—to isolate problem nodes, or multiple node connections

(cascaded ports or backbone connections)—to isolate parts of the network. The Late Collision Monitoring feature is enabled through the

“Robust” function in HP Stack Manager or the RObustness command in the ASCII console. The default setting is OFF.

Link Beat

Type 10Base-T devices use a signal called link beat (also called link test pulse). This signal informs the hub of the presence of a device connected to it over twisted-pair cable and of the integrity of the twisted-pair link between them. The hub will not transmit packets out of twisted-pair ports that do not sense the link beat signal.

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Hub Reference

Managing Your Hub —

HP Distributed Management

One of the key features of the HP AdvanceStack family of hubs is the ease with which a hub can be managed. There are two main management options:

Out-of-band management

from a PC running HP Stack Manager connected to the RS-232 console port of any of the hubs in the stack.

In-band management

from a network management station running

HP Interconnect Manager anywhere on the network that the hubs are in.

PC running HP Stack Manager connected to the hub stack or an

ASCII terminal emulator

Network management station on the LAN, running

HP Interconnect Manager (ICM)

HP Ethernet

SNMP Module

(required for ICM and the ASCII terminal) distributed management chain

Hub Reference

Chaining the Hubs

The HP AdvanceStack hubs can be easily connected together with standard unshielded twisted-pair cable through their Extension (In/Out) ports to form a distributed management chain. When hubs are “chained” together, any hub in the stack can be managed from a single PC running

HP Stack Manager, or, if one hub in the stack has the HP Ethernet SNMP

Module installed, the entire stack can be managed from an SNMP network management station or from an ASCII terminal or PC terminal emulator. The chain can extend up to 185 meters (end-to-end) so multiple wiring closets can be managed from a single location.

Note that this is not a network connection, it is only a management connection between the hubs.

Refer to chapter 1, “Installing the HP AdvanceStack 10Base-T Hubs” for information about chaining and network connections.

Out-of-Band Management

The basic management program included with your hub, HP Stack

Manager, is a Windows-based graphical user interface that serves as the console for the HP AdvanceStack hubs. With this program you can configure, monitor, and diagnose your hub or a chain of hubs. Refer to chapter 2, “Installing and Using HP Stack Manager”, for more details about out-of-band management.

Included with the HP J2603A or B Ethernet SNMP Module is an ASCII console interface that can also be used to configure, monitor, and diagnose your hub or a chain of hubs. The SNMP Module must have firmware agent A.03.00 or later. Refer to the

HP Ethernet SNMP Module

Installation and Reference Guide

for more information.

In-Band (Network) Management

When an HP Ethernet SNMP Module is installed in your

HP AdvanceStack 10Base-T Hub, the hub can be managed remotely by any network management product that complies with the Simple

Network Management Protocol (SNMP) standard.

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Hub Reference

MIB (Management Information Base) Support

The HP AdvanceStack 10Base-T Hub with an installed HP Ethernet SNMP

Module supports the following MIB standards: MIB-II (RFC 1213), IEEE

802.3 Repeater MIB (RFC 1516), and IEEE 802.3 MAU MIB (RFC 1515).

In addition, the hub implements HP MIB extensions that are available on request. Contact your HP-authorized LAN dealer or local HP sales office.

Using HP Network Management

HP offers an SNMP-compliant network management product that can manage your HP AdvanceStack hub (HP Interconnect Manager). This product uses a windowing interface to: manage multiple HP hubs and other HP network devices, including a “chain” of HP AdvanceStack hubs automatically generate a graphic display of the network map gather network traffic statistics enable and disable ports configure port security and other security features on the hub run tests of the hub test network links to other devices

Using Non-HP Network Management

To manage an HP AdvanceStack hub from a non-HP network management product, you must first obtain HP’s MIB extensions.

Contact your HP-authorized LAN dealer or local HP sales office for more information.

Security Features

If you have installed an HP Ethernet SNMP Module in your

HP AdvanceStack 10Base-T Hub, your hub has these security features: port security authorized managers list password protection

N o t e

Hub Reference

Port Security

This feature is configurable over the network from a network management station running HP Interconnect Manager, or out-of-band from an

ASCII terminal or terminal emulator.

The HP AdvanceStack 10Base-T Hub with HP Ethernet SNMP Module provides two main types of security on each of its network ports.

Intruder Prevention

for inbound data (from the end user to the hub)

Eavesdrop Prevention

for outbound data (from the hub to the end user)

Both of these types of security can be configured on each network port individually (the twisted-pair ports, the ThinLAN port, and the AUI/Xcvr port) and are enabled by comparing the source and destination address of each packet received or transmitted by the hub to each port’s

Authorized Station Address—the station address of the device that you configure to be authorized to communicate through that hub port.

See the HP Interconnect Manager documentation for more information on the Interconnect Manager control of this feature; see the HP Ethernet

SNMP Module documentation for description of the ASCII terminal

SEcure command.

Authorized Managers List

The HP AdvanceStack 10Base-T Hub with an HP Ethernet SNMP Module installed can be configured with a list of up to ten network management stations that are authorized to manage the hub. This list is configured through the “Authorized Managers” function in the HP Stack Manager program, the MAnagers command from an ASCII terminal, and through

HP Interconnect Manager. See chapter 2, “Installing and Using HP Stack

Manager”, for more information on the HP Stack Manager command; see the HP Ethernet SNMP Module manual for the MAnagers command; see the Security chapter in the HP Interconnect Manager documentation.

If an unauthorized management station attempts to access the hub

(especially to perform SNMP “set” commands), the Security LED on the hub’s front panel will flash.

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Hub Reference

Password Protection

The hub can be assigned a password to restrict access to the hub’s console interface and to the hub’s configuration from network management stations. The password also acts as the SNMP community name. The password is configured through the “Password” function in the HP Stack Manager program. See chapter 2, “Installing and Using HP

Stack Manager”, for more information; see the HP Ethernet SNMP

Module manual for the PAssword command.

Optional Modules

HP Ethernet SNMP Module

The HP Ethernet SNMP Module (HP J2603A or B) is an optional component that can be added to an HP AdvanceStack 10Base-T Hub to provide extended hub functions and management capabilities.

HP Ethernet SNMP Module

If the optional HP Ethernet SNMP Module is installed in the hub, you have these additional features:

Advanced embedded agent code enabling the hub to be managed remotely from a network management station that supports SNMP over IP (using the configured IP address) or Novell NetWare (IPX).

The agent code also provides HP EASE (Embedded Advanced

Sampling Environment) for enhanced network diagnostics from a network management station.

Hub Reference

Automatic sensing of the baud rate on the out-of-band management port, and support for higher port baud rates beyond the default 9600 baud.

Full V.22bis modem line control for remote out-of-band management access to the hub or stack of hubs.

Capability to manage up to 16 hubs in a chain, even if the other hubs do not have management modules.

Security features including port security, network management authorization, and hub access password protection. See “Security

Features” in this chapter for more information.

Support for a redundant backup link to another hub to enhance network fault tolerance.

An Intel i960 RISC processor, 1 megabyte RAM, 8 kilobytes EEPROM for configuration data, and 256 kilobytes flash EEPROM for additional processing power and future upgrade capabilities.

Updatable firmware that enables enhancements to be downloaded either from a computer attached to the out-of-band management port or over the network. (See “Firmware Enhancements” later in this chapter.)

With firmware version A.03.00 or later, the agent code provides an

ASCII terminal interface for configuring, monitoring, and troubleshooting the hub (a similar set of features to the

Windows-based HP Stack Manager interface.) To obtain the latest firmware, see the end of chapter 4, “Troubleshooting” for information on how to download the latest agent code.

3-13

Hub Reference

HP Transceiver Modules

The HP Transceiver Modules are optional modules that can be added to an HP AdvanceStack hub. They provide extended connectivity choices from the hub to Ethernet networks. You have a choice of using any of these modules:

HP J2606A Fiber-Optic

Transceiver Module for 10Base-FL

HP J2607A Twisted-Pair

Transceiver Module for 10Base-T

HP J2608A ThinLAN

Transceiver Module for 10Base2

HP J2609A AUI

Port Module for external transceivers

3-14

Hub Reference

HP Router Module

The HP J2628A Router 210 Module is an auxiliary module for the

HP AdvanceStack 10Base-T Hub. The Router 210 Module attaches to the

HP J2603B Ethernet SNMP Module and is then installed in the hub’s expansion slot.

SNMP module connector

(internal

LAN port)

Battery (maintains the configuration in

RAM when the hub is powered off)

Status LEDs

WAN port connector

Clear button

Reset button

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

3-15

3-16

Hub Reference

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 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

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.

Hub Reference

HP Dial-a-LAN Remote Access

Server

The two HP AdvanceStack Dial-A-LAN auxiliary modules are remote access servers for Ethernet networks. These products serve remote PCs,

Macintoshes, and UNIX workstations by allowing users to dial in to a 12,

24, or 48-port AdvanceStack hub.

The two models are: a two-port version: HP J2623A AdvanceStack Dial-A-LAN 2A/Plus

V.34

a four-port version: HP J2624A AdvanceStack Dial-A-LAN 4A

Each module requires an Ethernet SNMP Module (J2603B) for installation into the Expansion Slot of an HP AdvanceStack hub.

If you do not have a J2603B SNMP Module already, you can purchase the

Dial-A-LAN and SNMP modules together in either of the following bundles:

HP J2633A Dial-A-LAN 2A/Plus V.34 and HP Ethernet SNMP Module

HP J2634A Dial-A-LAN 4A with the HP Ethernet SNMP Module

HP J2623A Dial-A-LAN 2A/Plus V.34

The HP Dial-A-LAN 2A/Plus 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.

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Hub Reference

HP J2624A 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.

3-18

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

Access speeds available to 115 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), SLIP, and

CSLIP. IP, IPX, NetBEUI, and LLC dial-in are also supported.

PPP Stacker Compression available for dial-in and LAN-to-LAN connections.

DHCP support for dial-in client address assignment.

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

Windows support and DOS-based dial-out access through NASI and

Int 14 for IPX networks to remote BBS services. No file transfer capability is available in IP dial-out mode.

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.

Hub Reference

Firmware Enhancements

Hewlett-Packard continually tests and improves its products. When firmware enhancements are made to the HP AdvanceStack hubs that have an optional HP Ethernet SNMP Module installed, 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 out-of-band management port or downloaded over the network. See the end of chapter 4, “Troubleshooting” for information on how to download the latest agent code.

The update procedure is described in the file that comes with the latest

SNMP Module firmware for your HP AdvanceStack hub.

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4

Troubleshooting Approaches

Diagnosing with the LEDs

Installation Problems

Cabling Problems

Unusual Network Activity

IP Configuration Errors

Diagnostic Tests

Customer Support Services

Troubleshooting

4-2

Troubleshooting

This chapter describes how to diagnose and resolve operating problems with the HP AdvanceStack 10Base-T Hubs.

This chapter describes these topics: basic troubleshooting approaches diagnosing with the LEDs installation, cabling, and unusual network activity problems diagnostics tests

Additionally, certain diagnostic functions useful for troubleshooting are contained in the HP Stack Manager software. These functions are described in chapter 1, “Installing and Using HP Stack Manager” and in the software’s online help system. Some of these diagnostic functions are available only to hubs that have an HP Ethernet SNMP Module

(HP J2603A or B) installed.

Troubleshooting Approaches

There are three primary ways to diagnose hub problems:

By checking the LEDs on the front of the hub as described in

“Diagnosing with the LEDs” later in this chapter.

By visually inspecting the unit and all its connections as described in the “Installation Problems” and “Cabling Problems” sections later in this chapter.

By using the HP Stack Manager’s diagnostic functions described in chapter 2, “Installing and Using HP Stack Manager”, and in the software’s online help system.

Alternatively, if you don’t have a Windows-capable PC, you can use an ASCII terminal or PC running a terminal emulator to monitor hub status and run diagnostic tests. For this operation, the hub, or one of the hubs in the stack, must have an HP Ethernet SNMP Module installed. See the module’s documentation for more information on the ASCII terminal interface.

Troubleshooting

Diagnosing with the LEDs

Most problems with the hub can be diagnosed using the LEDs on its front panel. This section describes the normal LED pattern when the hub is being self-tested, and LED patterns that indicate error conditions on the hub.

LED Pattern During Self-Test

When the hub is first turned on and whenever it is reset, it performs a self-diagnostic test during which time all the LEDs should be lit. The

LED pattern varies during the self-test depending on whether the hub has an optional HP Ethernet SNMP Module installed.

For a hub without an SNMP Module, the self-test takes approximately 3 seconds during which time all the LEDs (except the

RPS LED) are lit.

For a hub with an SNMP Module, the 3-second hub test takes place first (all the LEDs are lit), followed by the SNMP Module self-test, which lasts approximately an additional 57 seconds. While the SNMP

Module is being tested, the Activity, Collision, and RPS LEDs are not lit (or are flickering if there is network traffic on the hub), and the

Exp Slot LED flashes slowly.

When the self-test completes, the LEDs then go into their normal operational state or indicate an error condition.

The tables on the following two pages list the hub’s LEDs, their possible states, and diagnostic tips to resolve any error conditions.

4-3

Troubleshooting

LED Error Indications

The tables on the next two pages describe LED patterns that indicate error conditions.

LED patterns indicating problems

Power Collision Fault Security RPS

OFF

ON

ON

*

*

Appears solidly

ON

*

OFF

*

*

OFF

*

*

*

*

Diagnostic Tips

Exp

Slot

*

*

*

Port

*

Check power cord and power source. If OK, replace hub.

OFF or flashing intermittently for a port in use.

Check cabling on indicated port.

Use HP Stack Manager or the ASCII console STatus command to determine the state of the port. For

HP Stack Manager, review the graphical image of your hub to determine whether:

– the port was disabled by the Port function. Reenable if desired. A disabled port is grayed-out with a black bar through it.

– For a twisted-pair port, link beat is not detected. In this condition, the link beat bar (below the port symbol on the graphic display) will be red. Be sure the cable is properly connected.

– For the ThinLAN port, Thinwatch is disabled (the default value) and the port is auto-segmented (the port symbol will be red).

*

Thinwatch improves diagnosis of a faulty ThinLAN port. Configure Thinwatch from HP Interconnect

Manager or from the ASCII terminal.

Very frequent collisions could indicate a network fault or improperly terminated cable.

A transceiver attached to the AUI port may not have the SQE test disabled.

*This LED is not important for the diagnosis.

4-4

Troubleshooting

LED patterns indicating problems Diagnostic Tips

Power Collision

ON

ON

OFF

ON

ON

ON

ON

*

*

*

*

*

*

*

Fault

Slow

Flash

Slow

Flash

*

*

*

ON

ON

Security

OFF

*

*

Rapid

Flash

Rapid

Flash

ON

ON

RPS Exp

Slot

Port

*

Slow

Flash

OFF

*

*

*

*

*

*

*

ON

ON

Slow

Flash

*

The port has been auto-segmented because of too many collisions. Check cable terminations, connections, SQE setting on any external transceivers, and status of attached network devices for causes of the excess collisions.

The redundant power supply (RPS) may no longer be providing redundant power. See the documentation provided with the RPS for troubleshooting.

*

Rapid

Flash

The hub is not receiving power from the redundant power supply (RPS) or the cable connection is loose.

If you have an RPS connected, check the cable connections.

A port security violation has occurred on a hub with an HP Ethernet SNMP Module. The port is disabled.

Port security parameters are configurable from

HP Interconnect Manager. See the documentation for that program for more information.

Not

Flashing

An unauthorized network management station has attempted to access a hub with an HP Ethernet

SNMP Module.

Slow

Flash

(for more than 60 sec.

after a reset or power on)

All ON

The HP Ethernet SNMP Module has failed self-test and/or its firmware code has become corrupted. This is frequently the result of a failure during downloading of new code. Repeat the download process.

If the hub self-test fails again, contact your

HP-authorized LAN dealer or HP representative for assistance.

Under this condition, the hub will continue its normal repeater function, but the console and control capabilities will be limited.

ON Variable; all may be ON

A hub hardware failure was detected during selftest. Self-test does not complete so the LEDs will stay on longer than 60 seconds.

Power cycle the hub. If this condition persists, the hub may have to be replaced. Contact your

HP-authorized LAN dealer or HP representative for assistance.

* This LED is not important for the diagnosis

4-5

4-6

Troubleshooting

Installation Problems

By carefully following the installation procedures described in chapter

1, “Installing the HP AdvanceStack 10Base-T Hubs”, you can avoid most problems caused by improper installation of the hub or one of its components.

Incorrect Installation

Incorrectly installing the hub, the HP Ethernet SNMP Module, or a transceiver module can result in one or all of these components malfunctioning or not functioning at all. If one or all of these components appear to not be functioning, re-check the installation procedure and, if necessary, re-install the component correctly.

If no power appears to be getting to the hub unit, check the power cord at both the back of the hub and the ac power outlet to be certain the cord is properly connected.

ASCII Console Connection Problems

The ASCII console was added to the HP J2603B Ethernet SNMP Module firmware versions A.03.00 or later. If your EEPROM is older, you do not have the ASCII console. See chapter 3, “Hub Reference” for information on how to update your HP J2603A or B Ethernet SNMP Module with the latest firmware.

You can determine your firmware version with HP Stack Manager or

HPInterconnect Manager. To determine your firmware version, follow these steps:

1. In HP Stack Manager, double click on a hub that has an SNMP Module.

2. Click on the Identify icon.

3. Scroll through the list until you see

SNMP Agent EEPROM Vers.

Troubleshooting

Cabling Problems

A high percentage of network problems are due to faulty cabling.

Cabling problems usually result in the failure of a hub to connect to a network, another hub, or the console.

Connections

All cables attached to the hub should be checked to see that they are properly connected. Proper network and out-of-band management connections are described in chapter 1, “Installing the HP AdvanceStack

10Base-T Hubs”.

Properly connecting cables to the transceiver modules is described in the documentation that accompanies those modules.

If the ThinLAN port is being used, be certain the ThinLAN cable segment attached to the port is properly terminated with a 50-ohm terminator at both ends, as described in chapter 1, “Installing the HP AdvanceStack

10Base-T Hubs”.

Non-standard Cables

Mis-wired cables may cause numerous network collisions, and can seriously impair network performance. Before connecting cables into your network, you should verify that they comply with the applicable standards. For a list of compatible cables and a description of the pinouts for each port on the hub (which can be used to confirm the compatibility of unlisted cables), see appendix A, “Cables and

Connectors”.

4-7

4-8

Troubleshooting

Topology

It is important to make sure you have a valid network topology.

Common topology faults include excessive cable length and excessive repeater delays between nodes. 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 guide entitled

Designing HP AdvanceStack Workgroup Networks

for topology configuration guidelines. Contact your HP-authorized LAN dealer or local HP sales office to get a copy of this guide.

Unusual Network Activity

Network activity that exceeds accepted norms often indicates a hardware problem with one or more of the network components, including, possibly, the hub. Unusual network activity is usually indicated by the LEDs on the front of the hub or measured with one of the diagnostic tools in the HP Stack Manager. Refer to “Diagnosing with

LEDs” earlier in this chapter for information on using LEDs to identify unusual network activity.

IP Configuration Errors

If you are using IP communications, make sure your IP configuration parameters are set properly. Use the HP Stack Manager’s IP

Configuration function. (This function is available only on hubs that have an installed HP Ethernet SNMP Module.) Incorrect IP configuration on the hub will prevent it from communicating with the network management station, and may cause other network problems.

In particular, make sure you provide the hub with a unique IP address, and that you use the correct subnet mask for your network. See appendix D, “Network Addressing”, for more information.

Troubleshooting

Diagnostic Tests

The HP Stack Manager software provides tests and indicators that can be used to monitor the hub and its network connections. See chapter 2,

“Installing and Using HP Stack Manager”, and the software’s online Help system for more details about these tests and indicators.

Testing the Hub Only

If you believe that the hub is not operating correctly, you can test the hub’s circuitry by resetting the hub through one of these procedures:

Press the Reset button.

Select the “Power-on Reset” option from HP Stack Manager’s Reset function or select type the REset command using the ASCII console.

Select the “Power-on Reset” option from the HP Interconnect

Manager interface.

Each of these procedures will cause the hub to complete its power-on self-test. If any error conditions exist in the hub, the LEDs should display the condition. See “Diagnosing with the LEDs” earlier in this chapter to interpret the LED display.

Testing the Hub’s Ports and the Links

These tests are available only on hubs that have an HP Ethernet SNMP

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 function.

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 station address.

Continued on the next page.

4-9

4-10

Troubleshooting

Select

Ping Test

from HP Stack Manager’s Network Test function or type the PIng command at the ASCII terminal. 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.

Select

IPX Test

from HP Stack Manager’s Network Test function.

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 you are testing the AUI port, this also tests the transceiver that is attached to the port.

If the test fails, you can test the hub using the “Testing the Hub Only” procedures 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.

Testing Twisted-Pair Cabling

The twisted-pair cable attached to the HP AdvanceStack 10Base-T Hub must be compatible with the IEEE 802.3 Type 10Base-T standard. To verify that your cable is compatible with this standard, you can use the

HP J2263A 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

Clearing a Password

There is a Password Clear button on the HP Ethernet SNMP Module that is accessed through a hole in the hub’s Expansion Slot cover plate. You can use this button to clear a forgotten password that was previously configured on the hub. The password is configured from either:

HP Stack Manager

HP Interconnect Manager, or

ASCII terminal interface

N o t e

Press the Password Clear button with a pen or other pointed object.

To clear the password

, press and hold the button for approximately five seconds.

As an indication that the password has been cleared, the Security LED on the front of the hub will come on and stay on until the button is released.

After the password has been cleared, access to the hub from the

HP Stack Manager and from SNMP management stations will no longer be password protected.

4-11

4-12

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

HP Interconnect Manager ( icmupdt.exe

), HP Stack Manager ( stkmgr.exe

) and SNMP firmware for your AdvanceStack hubs ( asfw.exe

) are available through the HP BBS, World Wide Web, CompuServe, and the

HP FTP Library Service. After you download the file(s) from one of these sources, you type filename /x

. For example, icmupdt /x

HP BBS and World Wide Web

The HP BBS phone number is (208) 344-1691. Set your modem communication settings to: parity = N data bits = 8 stop bits = 1 baud rates = 300, 1200, 2400, 4800, 9600, or 14400

The URL address for the World Wide Web is:

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

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

)

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

5. Change directories: cd pub/networking/software

6. Retrieve the file by entering: get filename ( e.g.

, get asfw.exe)

7. Quit the FTP session by entering: quit

8. Extract the file (e.g., asfw /x)

Troubleshooting

4-13

4-14

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 as well as an hourly connect charge 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 filename

(e.g., download icmupdt.exe

)

5. Log off CompuServe.

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

)

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 from your touch-tone telephone:

Location Phone Number

U.S. and Canada Only

Outside the U.S. and

Canada

(800) 333-1917 and press 1 for HP FIRST

(208) 344-4809 and press 9 for HP FIRST

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.

4-15

A

Recommended Cables

Twisted-Pair Cable/Connector Pin-Outs

ThinLAN Cable Requirements

AUI Cable Minimum Pin-Out

Distributed Management Connector/Cable Pin-Outs

Cables and Connectors

N o t e

Cables and Connectors

This appendix lists cables that have been tested and verified for use with the HP AdvanceStack 10Base-T 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.

Incorrectly wired cabling is the most common cause of problems for

LAN 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

ThinLAN cable requirements

AUI cable

Console connector and cable pin-outs

For information about the cable used for the Redundant Power Supply

(RPS), see the documentation accompanying the RPS.

A-2

Cables and Connectors

Recommended Cables

Cable Function Port Type on PC, or Modem

Network connections to the hub:

— Hub to end node connection

Hub to hub

“cascade” connection

Hub to hub ThinLAN backbone connection

Cable Type

Twisted-pair “straightthrough” cable

Twisted-pair

“crossover” cable

IEEE Type 10Base2

Thin coaxial cable

Transceiver connection to the

AUI Port Module *

— AUI cable

HP Product Number

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

92214R, S, or T (25-pair)

92214W (6-inch Crossover Cable)

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

92264D (1 meter)

92254A through H (6–48 meters)

92254J (5 meters)

* 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.

Console PC connection to the hub’s RS-232 port:

Connecting the PC directly to the hub’s

RS-232 port

9-pin male

25-pin male

RS-232-C 9-pin female to 9-pin female null modem or “crossover” cable

RS-232-C 9-pin female to 25-pin female null modem or “crossover” cable

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

25-pin female RS-232-C 9-pin female to 25-pin male standard modem or

“straight-through” cable

RS-232-C cable provided with the hub

(HP p/n 5182-4794)

HP 24542H

HP 24542M

Hub to hub connections for distributed management

Distributed management extension connections

— Twisted-pair “straightthrough” cable

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

A-3

Cables and Connectors

Twisted-Pair Cable/Connector

Pin-Outs

Twisted-Pair Cable for Hub-to-Computer

Network Connection

To connect PCs or other network devices to the hub, use a

“straight-through” 10Base-T 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

N o t e

white/orange orange/white white/green green/white

Pins 1 and 2

must

be wired to a twisted pair.

Pins 3 and 6

must

be wired to a twisted pair.

Pins 4, 5, 7, and 8 are not used in this application, although they may be wired in the cable.

A-4

Cables and Connectors

Twisted-Pair Cable for Hub-to-Hub Distributed

Management Chaining

(not a network connection)

To connect hubs to each other through the Extension (In/Out) Ports to form a distributed management chain, use a “straight-through” 10Base-T 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

N o t e

blue/white white/blue

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

Twisted-Pair “Crossover” Cable for

Hub-to-Hub Network Connection

For wiring between two hubs for data communications, the transmit and receive pairs must be reversed. The twisted-pair wires must be twisted through the entire length of the cable. See “Twisted-Pair Cable Pin

Assignments” later in this chapter for a listing of the signals used on each pin.

Crossover cable

N o t e

white/orange orange/white white/green green/white

Pins 1 and 2 on the hub 1 end

must

be wired through a twisted pair to pins 3 and 6 on the hub 2 end. Pins 3 and 6 on the hub 1 end

must

be wired through a twisted pair to pins 1 and 2 on the hub 2 end.

Pins 4, 5, 7, and 8 are not used in this application, although they may be wired in the cable.

Crossover cable straight-through in-line adapter

A short crossover cable (like the

HP 92214W) can be used to adapt a straight-through twisted-pair cable for

“cascading” hubs through the twistedpair ports.

hub straight-through cable hub

A-6

Twisted-Pair Cable Pin Assignments

Twisted-Pair Straight-Through Cable

Signal

(receive +)

(receive –)

(transmit +)

(transmit –)

Hub End

Pins

3

6

1

2

3

6

1

2

Pins

Computer or

Transceiver End

Signal

(transmit +)

(transmit –)

(receive +)

(receive –)

Twisted-Pair Crossover Cable

Signal

(receive +)

(receive –)

(transmit +)

(transmit –)

Hub 1-end

Pins

3

6

1

2

2

1

6

3

Pins

Hub 2-end

Signal

(transmit –)

(transmit +)

(receive –)

(receive +)

Cables and Connectors

ThinLAN Cable Requirements

The thin coaxial cables used with the HP AdvanceStack 10Base-T Hubs must comply with the IEEE 802.3 Type 10Base2 requirements. Some

RG-58 A/U or RG-58 C/U cables meet these requirements.

The maximum length of a single thin coaxial cable segment is 185 meters.

The minimum length (for example, to connect adjacent hubs in a rack) is 0.5 meter.

A-7

A-8

Cables and Connectors

AUI Cable Minimum Pin-Out

Transceiver end

15-pin female

6

9

10

12

13

4

5

2

3

Hub end

15-pin male

6

9

10

12

13

4

5

2

3

Signal

Control In circuit A

Data Out circuit A

Data In circuit Shield (common drain)

Data In circuit A

Voltage Common

Control In circuit B

Data Out circuit B

Data In circuit B

Voltage Plus

For this connection, you can use:

HP 92264D (1-meter thin AUI extension, pin 4 not connected)

HP 92254A through H (6-meter through 48-meter thick AUI cables)

HP 92254J (5-meter thin AUI cable, pin 4 not connected)

Some longer cables may have all 15 pins wired.

See the IEEE 802.3 standards document for definitions of the pins not shown here.

Cables and Connectors

Distributed Management

RS-232 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 10Base-T

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 Distributed Management RS-232 port.

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

5

6

7

8

9

PIN

1

2

3

4

GND

DSR

RTS

CTS

RI

US

DCD

Rx

Tx

DTR

102

107

105

106

125

CCITT

109

104

103

108

-

M1

S2

M2

M3

DIN

M5

D2

D1

S1

A-9

A-10

Cables and Connectors

RS-232-C “Null Modem” Cable for Direct Console Connection

(supplied with the hub)

PC end

9-pin female

2

3

5

Hub end

9-pin female

2

3

5

Rx

Tx

GND

RS-232-C Modem Cable

Modem end

25-pin male

2

3

4

5

6

7

8

20

22

23

Hub end

9-pin female Signal

3

2

7

Tx

Rx

RTS

8

6

CTS

DSR

5

1

4

9

GND

CD OR DCD

DTR

RI

DRS – typically on V.24 (European) modems

(not connected)

B

Specifications

B-2

Specifications

Physical

Width:

Depth:

Height:

Weight:

HP J2600A 12-Port Hub

HP J2601B 24-Port Hub

44.2 cm (17.4 in)

29.8 cm (11.7 in)

6.6 cm (2.6 in)

4.1 kg (9.0 lb)

HP J2602B 48-Port Hub

44.2 cm (17.4 in)

29.8 cm (11.7 in)

11.0 cm (4.3 in)

5.0 kg (11.0 lb)

Electrical

(The HP AdvanceStack hubs automatically adjust to any voltage between 100 and 240 volts and any frequency between 50 and 60 Hz.)

ac voltage:

Typical current:

Maximum current:

Frequency range:

100-127 volts

Voltage tolerance of +/- 10%

0.6 A (HP J2600A, J2601B)

0.8 A (HP J2602B)

1.0 A

50/60 Hz

200-240 volts

Voltage tolerance of +/- 10%

0.3 A (HP J2600A, J2601B)

0.4 A (HP J2602B)

0.6 A

50/60 Hz

The maximum current ratings represent the current that could be drawn with a fully loaded expansion slot and external MAU’s.

Environmental

Operating Non-Operatin

g

Temperature:

0

°

C to 55

°

C

(32

°

F to 131

°

F)

Relative humidity:

(non-condensing)

Maximum altitude:

15% to 95% at 40

°

C (104

°

F)

4.6 km (15,000 ft)

-40

°

C to 70

°

C

(-40

°

F to 158

°

F)

15% to 90% at 65

°

C (149

°

F)

4.6 km (15,000 ft)

Connectors

The 50-pin and RJ-45 twisted-pair ports are compatible with the

IEEE 802.3 Type 10Base-T standard.

The ThinLAN port is compatible with the IEEE 802.3 Type 10Base2 standard.

The RS-232-C console port conforms to V.22 bis. (Modem use requires HP J2603A or B Ethernet SNMP Module.)

Specifications

Electromagnetic

Emissions

FCC part 15 Class A

CISPR-22 Class A

EN 55022 Class A

VCCI Level I

Immunity

ESD IEC 801-2 (1991) (4 kV CD, 8 kV AD)

Radiated (Immunity)

Electrical Fast Transient

IEC 801-3 (1984) (3 V/m)

IEC 801-4 (1988) 0.5kV signal lines

1.0kV power lines

Safety

IEC 950: (1991)+A1,A2/.EN60950 I(1992)+A1,A2

UL1950

CSA 950

NOM-019-SCFI-1993

Accoustic Noise

Not applicable

SNMP Network Management Agent Support

(with HP J2603A or B Ethernet SNMP Module)

RFC 1213 – MIB-II

RFC 1516 – IEEE 802.3 Repeater MIB

RFC 1515 – IEEE 802.3 MAU MIB

HP Enterprise-Specific Extensions

Warranty

See the warranty card that is shrink-wrapped with this manual.

Datacomm Declarations

United Kingdom:

The HP J2600A, J2601B, and J2602B hubs are approved under Approval

Number NS/G/1234/J/100003 for indirect connection to public telecommunications systems within the United Kingdom.

B-3

C

Communications Between Hub and Network Management Station

IPX Addressing for Novell NetWare

IP Addressing for IP and non-IP Networks

Using BOOTP

Network Addressing

C-2

Network Addressing

Communication Between the Hub and Network Management Station

The HP AdvanceStack 10Base-T Hubs that have an HP Ethernet SNMP

Module (HP J2603A or B) installed in them can be managed over the network by HP network management products, for example HP

Interconnect Manager. These hubs can also be managed by any other network management products that comply with the Simple Network

Management Protocol (SNMP) standard and have standard SNMP

MIB-browser functionality.

The communication between the SNMP network management station and the hub takes place using the network layer protocols, IPX for

Novell networks, or IP for TCP/IP networks.

Which protocol you use depends on the protocol being used by the network management station. Additionally, if the network management station is on the other side of a router from your hub, the protocol you run on both the hub and the network management station depends on which protocol the router can handle.

The network layer communications require that the hub have a network layer address. This appendix provides some background information on

IPX and IP addressing.

Network Addressing

IPX Addressing for Novell NetWare

The Novell NetWare network operating system uses a proprietary protocol called Internetwork Packet Exchange (IPX). The IPX protocol firmware is always available on an HP AdvanceStack 10Base-T Hub; it becomes active when the hub gets an IPX address. The IPX address consists of a network number and a device identification. The address is automatically assigned to the hub as follows (no IPX configuration of the hub is necessary):

The network number is automatically assigned by a router or file server on the network that is running the IPX protocol.

The device identification is usually the hub’s station address (also known as the MAC address, Ethernet address, or physical address).

This address is a unique 12-digit hexadecimal number assigned to the hub at the factory.

IPX Addressing Notes:

Because the IPX address is assigned automatically, no IPX configuration is necessary; therefore no IPX configuration is provided on the hub console interface. By default, the hub is ready to be managed by an SNMP network management station that is configured for IPX communications.

If your hub is part of a network that is running IPX only, you do not need to perform the IP configuration.

C-3

C-4

Network Addressing

IP Addresses for IP and Non-IP

Networks

If you have chosen to manage your hub with an SNMP/IP network manager, your hub must be configured with an IP address. If your network will be connected with other networks that use IP addresses, you must use

assigned

IP addresses. Otherwise, you can build your own

IP addressing scheme (described on the next page).

Using Assigned IP Addresses

Hewlett-Packard strongly recommends that if you intend to expand, integrate, or connect your network to other networks, you use an assigned IP address (globally administered addresses). There is a formal process to assign unique IP addresses to networks worldwide.

Government Systems, Incorporated (GSI) is in charge of assigning IP addresses. You must fill out and submit an application form to GSI. You can get this form by either sending an electronic mail message to [email protected]

or by writing GSI at the following address:

Mailing Address

Telephone

Government Systems, Inc.

Attn: Network Information Center

14200 Park Meadow Drive, Suite 200

Chantilly, VA 22021 in U.S. only: worldwide:

FAX:

1-800-365-3642

1-703-802-4535

1-703-802-8376

Allow at least eight working days for GSI to process an IP address request.

Building Your Own IP Addressing Scheme

If your network is isolated and will not be connected to any other networks that use IP addressing, you can build your own IP addressing scheme (locally administered addresses). If you use your own addressing scheme, be aware that any connection to another IP network could cause communication problems on both networks. The IP addresses on the two networks must be compatible. Each address must be unique.

Network Addressing

The following documents have detailed descriptions on how to build your own IP addressing scheme:

HP Interconnect Manager Getting Started Guide

:

(OpenView/Windows: HP part number 5963-2619)

(OpenView/HP-UX: HP part number 5963-2687)

Internetworking With TCP/IP: Principles, Protocols, and

Architecture

Author: Douglas E. Comer

Publisher: Prentice-Hall, Inc.

Example Addressing Scheme

On the next page is an example of a class C addressing scheme. Class C addresses allow up to 254 devices to be configured. If you have 254 or fewer devices to be managed on your network, you can use the addressing scheme shown below. If you have more than 254 devices to configure, see the referenced documents and use a class B addressing scheme. Class B allows 65534 devices to be configured.

The IP address format is X.X.X.X, where each X is an integer between 1 and 255. The integers are separated by decimal points. For a given network with its own class C addressing scheme, the first three integers of each address must be the same. The fourth integer must be unique for each addressed device.

Do not use 0 or 255 as the value in the last position on the right. They are reserved integers.

For three hubs and an HP network management station on the network, the class C addresses might be: management station 192.1.1.1

first hub 192.1.1.10

second hub third hub

192.1.1.11

192.1.1.12

The IP Configuration function in the HP Stack Manager software enables you to specify IP addresses. See chapter 2, “Installing and Using

HP Stack Manager”, and the software’s online help system for details.

C-5

C-6

Network Addressing

Using BOOTP

BOOTP (Bootstrap Protocol) is used to download network configuration data from a server (the BOOTP server) to the hub. The configuration data the hub retrieves from the BOOTP server is: the IP address for the hub the subnet mask for the subnet on which the hub is installed the default router

If you have configured the hub’s IP parameters on a BOOTP server, you do not need to use the IP Configuration function in HP Stack Manager.

As shipped from the factory, the hub is configured to use BOOTP to retrieve the IP configuration information.

The BOOTP Process

When the hub is powered on, it broadcasts BOOTP requests that contain the hub’s station address. The BOOTP server receives the request and searches its BOOTP table file for an entry that matches the hub’s station address. If a match is found, the configuration data in the associated file entry is returned to the hub as a BOOTP reply. For most UNIX systems, the BOOTP table is contained in the

/etc/bootptab

file. The example below applies to the BOOTP table for UNIX systems.

BOOTP Table File Entries

An entry in the BOOTP table file

/etc/bootptab

for an HP AdvanceStack

10Base-T hub would be similar to the following: hphub24:\

:ht=ether:\

:ha=080009123456:\

:ip=190.40.101.22:\

:sm=255.255.255.0:\

:gw=190.40.101.1:\

:vm=rfc1048:

Network Addressing

Definitions of the table entry fields:

hphub24 is a user-defined symbolic name to help you find the correct section of the bootptab file. If you have multiple hubs that will be using BOOTP to get their IP configuration, you should use a unique symbolic name for each hub.

ht ha ip is the “hardware type” tag. For the HP AdvanceStack 10Base-T hubs, set this to

ether

(for Ethernet). This tag must precede the ha tag.

is the “hardware address” tag. Use the hub’s 12-digit station address.

sm is the IP address to be assigned to the hub. Enter the address in the dotteddecimal format as shown in the example on the previous page.

is the subnet mask of the subnet in which the hub is installed.

gw vm is the IP address of the default router (or gateway) that allows the hub to communicate with systems that are not on the local network segment. If there is no default router, do not include this tag.

is a required entry that specifies the BOOTP report format. For the HP

AdvanceStack 10Base-T hubs, you must set this parameter to

rfc1048

.

Notes for the bootptab file:

Blank lines and lines beginning with the pound sign (#) are ignored.

Make sure you include a colon (:) and a backslash (\) as a continuation indication at the end of each line except the last one.

The last line should end with just a colon (:).

Spaces are not allowed between the characters on a line.

Names, such as hphub24 must begin with a letter and can only contain letters, numbers, periods, or hyphens.

C-7

D

Description

Configuring a Backup Link

Identifying the Backup Link

Indications of Backup Link Activation

Reactivating the Primary Link

Example Topologies

Backup Links

N o t e

Backup Links

Description

The Backup Link function is available only for HP AdvanceStack

10Base-T Hubs in which an HP Ethernet SNMP Module (HP J2603A or

B) is installed.

In some network configurations a critical link exists, for example between two workgroups that regularly share or exchange data over the network. To maintain the integrity of such a critical link, the

HP AdvanceStack 10Base-T Hubs offer a backup link feature. A backup link is a separate cable run between two hubs that is automatically enabled if the connection designated as the primary link fails.

SNMP hub A

“monitoring hub”

802.2 test packets

“primary” link

802.2 response packets

“backup” link

(normally inactive)

SNMP hub B

“remote hub”

The hub on which the redundant link is configured (hub A in the illustration—the “Monitoring Hub”), is responsible for monitoring the link. It sends IEEE 802.2 Test packets to the hub at the other end of the link (hub B in the illustration—the “Remote Hub”) and looks for response packets from that hub. If the response packets fail to come back, the primary link is considered as having failed and the backup link, which had not been carrying any traffic, is enabled automatically. If the primary link does fail, it is automatically disabled until it can be repaired and re-enabled.

When the primary link is repaired, you must re-enable the primary port.

It is not re-enabled automatically. When the primary port is enabled, the backup port is automatically disabled and returned to backup mode. See

“Reactivating the Primary Link” later in this appendix.

D-2

Backup Links

Limitations

The hubs at both ends of the redundant link must have an

HP Ethernet SNMP Module installed.

Each hub can monitor a single backup link (only one backup link can be configured on each hub). But, the hub may be at the remote end of one backup link and at the monitoring end of a backup link to a different hub.

A given hub should be connected to the remote end of no more than two backup links. If it is functioning as the remote hub in more than two backup links, it may not be able to respond to the test packets fast enough when there is a high level of data traffic on the network segments.

This ability to respond may be improved by increasing the time between test packet transmissions on the monitoring hubs. For

all

the backup links in which the remote hub is involved, the time configured on the monitoring hubs for those links should be increased by one second for each additional backup link beyond two links. Add one to this count if the remote hub is also functioning as a primary (monitoring) hub in a different link.

Additional Notes

Any port on the hub can be used for either the primary link or the backup link.

Any combination of media types can be used. For example, a thin coax link from the ThinLAN port can act as a backup link to a twisted-pair link using one of the hub’s twisted-pair ports. A transceiver installed in the hub’s AUI/Xcvr slot, or externally attached to an AUI Port Module in the AUI/Xcvr slot, can provide a primary or backup link over any type medium (twisted-pair, coax, or fiber-optic cable). (See “Sample Topologies” later in this appendix.)

The primary link and the backup link cabling should be run over different paths (through different conduits, for example) to reduce the possibility that damage will occur to both cables simultaneously.

D-3

D-4

Backup Links

Configuring a Backup Link

Configure the Monitoring Hub Only.

All configuration of the backup link is performed from the HP Stack Manager program, and you perform the complete backup link configuration on the “monitoring” hub. On the “remote” hub, you only need to make sure the ports used in the primary and backup links are both enabled.

Use the HP Stack Manager’s Backup Function.

To configure this link, you use the Backup function in the HP Stack Manager. In the screen, you provide the following information: the port to be used for the backup link the port to be used for the primary link the station address of the hub at the remote end of the link how frequently (in seconds) test packets (used to check the status of the primary link) should be sent to the remote hub how many consecutive response failures will trigger activation of the backup link

(You can also use the equivalent ASCII console BAckup command.)

Follow this Configuration/Installation Sequence.

If a hub is installed in a network that includes two connections to another hub, and the backup link has not yet been configured, a loop in the network exists causing some network performance degradation. For this reason, it is better to configure the backup link on the hub before the hub is installed in the network. It is best to follow these steps:

1. Attach a PC running HP Stack Manager to the hub’s RS-232 port, or to the RS-232 port of any of the hubs in the chain containing the hub you want to configure, and start HP Stack Manager.

2. Access the hub you want to configure. (Remember that this hub must have an HP Ethernet SNMP Module installed.)

3. Use the Backup function to configure the backup link. (See the

Backup function description in chapter 2, “Installing and Using HP

Stack Manager”, or the software’s online help).

Backup Links

4. Complete the network cable connections between the monitoring hub and the remote hub. (For instructions, see “Port Connections” in chapter 1, “Installing the HP AdvanceStack 10Base-T Hubs”.)

5. Enable the primary port with the HP Stack Manager’s Port function.

This step is necessary because until you have completed step 3

(connecting the cables), the test packets cannot be successfully sent through the primary port. The primary port will therefore be disabled and the backup port will be activated. Once you enable the primary port, it assumes the active role.

6. On the remote hub, make sure that the ports connected to both the primary and backup links are enabled. On the monitoring hub, the status of the primary and backup ports is controlled by the hub’s firmware; you do not need to explicitly enable the monitoring hub’s ports.

Identifying the Backup Link

The ports designated as the primary and backup ports are identified in: the HP Stack Manager’s Backup function window.

HP Interconnect Manager. (See the that product’s documentation for more information.)

ASCII console interface by using the BAckup command

The primary port is identified by (pri), the backup port by (bkup).

D-5

D-6

Backup Links

Indications of Backup Link

Activation

When the primary link fails (“n” consecutive test packet responses were not received on the primary port from the other hub), the backup link is automatically enabled. The effect of this change is displayed on the monitoring hub’s LEDs and management interface. Activation of the backup link does not change the status of any of the ports on the remote hub.

On the hub’s LEDs, the primary port LED goes off, and the backup port

LED goes on.

On the HP Stack Manager’s front panel display for the hub, the status of the primary port changes from ON to OFF, and the backup port changes from OFF to ON.

On HP Interconnect Manager, you can automatically monitor the status of the backup link from the network management station. See your HP

Interconnect Manager documentation for more information.

On the ASCII terminal STatus command display, the primary port

(labeled pri) changes from ON to OFF, and the backup port (labeled bkup) changes from OFF to ON.

Backup Links

Reactivating the Primary Link

When the primary link is repaired, you can use any of the following methods to re-enable the primary port:

From HP Stack Manager click on the primary port on the Port Status display and use the Port function to enable that port.

From HP Stack Manager, use the Reset function to perform a

Power-on reset. This will restore the primary port’s active status.

From the ASCII terminal, use the POrt command to enable the primary port.

From the ASCII terminal, use the REset command to reset the hub.

This will restore the primary port’s active status.

Press the Reset button on the front of the hub, or cycle power on the hub. These processes will reset the hub and restore the primary port’s active status. These techniques are useful if you do not have access to HP Stack Manager (for example, because the hub is in a wiring closet and a console is not connected).

From an HP network management station, re-enable the primary port. See the network management product documentation for details on how to enable a port.

When the primary port is re-enabled, the backup port is automatically disabled and returned to backup mode.

D-7

D-8

Backup Links

Example Topologies

Following are two simple example topologies that may give you some ideas on how a backup link could be used in your network.

Example 1: Hub-to-Hub

In this example topology, the primary and backup links consist of twisted-pair cable segments between two HP AdvanceStack hubs.

Wiring Closet 1

Wiring Closet 2

To another network

Primary Link

Backup Link

Backup Links

Example 2: Backup Link Using Alternative

Medium

In this topology, the primary link consists of a twisted-pair cable between twisted-pair ports on two HP AdvanceStack hubs; the backup link is from AUI port to AUI port on the two hubs. Depending on the type of transceivers used, the backup link could use thin coax, fiber-optic cable, or even twisted-pair cable.

Note that any of the network ports on these hubs can function as a backup to any other port.

Wiring Closet 1

Wiring Closet 2

To another network

Backup Link

(twisted-pair, thin coax, or fiber-optic)

Primary Link

(twisted-pair cable

D-9

Safety and Regulatory Statements

2 Safety Information

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.

WARNING

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

CAUTION

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.

Informations concernant la sécurité

Symboles de sécurité

WARNING

Symbole de référence à la documentation. Si le produit est marqué de ce symbole, reportez-vous à la documentation du produit afin d’obtenir des informations plus détaillées.

Dans la documentation, un WARNING indique un danger susceptible d’entraîner des dommages corporels ou la mort.

CAUTION

Un texte de mise en garde intitulé CAUTION indique un danger susceptible de causer des dommages à l’équipement.

Ne continuez pas au-delà d’une rubrique WARNING ou CAUTION avant d’avoir bien compris les conditions présentant un danger et pris les mesures appropriées.

Cet appareil est un produit de classe I et possède une borne de mise à la terre. La source d’alimentation principale doit être munie d’une prise de terre de sécurité installée aux bornes du câblage d’entrée, sur le cordon d’alimentation ou le cordon de raccordement fourni avec le produit. Lorsque cette protection semble avoir été endommagée, débrancher le cordon d’alimentation jusqu’à ce que la mise à la terre ait été réparée.

Mise à la terre du câble de réseau local: si votre réseau local s’étend sur une zone desservie par plus d’un système de distribution de puissance, assurez-vous que les prises de terre de sécurité soient convenablement interconnectées.

Les câbles de réseaux locaux peuvent occasionnellement être soumis à des surtensions transitoires dangereuses (telles que la foudre ou des perturbations dans le réseau d’alimentation public). Manipulez les composants métalliques du réseau avec précautions.

Aucune pièce contenue à l’intérieur de ce produit ne peut être réparée par l’utilisateur. Tout dépannage, réglage, entretien ou réparation devra être confié exclusivement à un personnel qualifié.

Cet appareil ne comporte pas de commutateur principal ; la mise sous tension est effectuée par branchement du cordon d’alimentation.

Informations concernant la sécurité 3

Hinweise zur Sicherheit

Sicherheitssymbole

WARNING

Symbol für Dokumentationsverweis. Wenn das Produkt mit diesem Symbol markiert ist, schlagen Sie bitte in der Produktdokumentation nach, um mehr

Informationen über das Produkt zu erhalten.

Eine WARNING in der Dokumentation symbolisiert eine Gefahr, die

Verletzungen oder sogar Todesfälle verursachen kann.

CAUTION

CAUTION in der Dokumentation symbolisiert eine Gefahr, die das Gerät beschädigen kann.

Fahren Sie nach dem Hinweis WARNING oder CAUTION erst fort, nachdem

Sie den Gefahrenzustand verstanden und die entsprechenden Maßnahmen ergriffen haben.

Dies ist ein Gerät der Sicherheitsklasse I und verfügt über einen schützenden Erdungsterminal.

Der Betrieb des Geräts erfordert eine ununterbrochene Sicherheitserdung von der

Hauptstromquelle zu den Geräteingabeterminals, den Netzkabeln oder dem mit Strom belieferten Netzkabelsatz voraus. Sobald Grund zur Annahme besteht, daß der Schutz beeinträchtigt worden ist, das Netzkabel aus der Wandsteckdose herausziehen, bis die Erdung wiederhergestellt ist.

Für LAN-Kabelerdung:

Wenn Ihr LAN ein Gebiet umfaßt, das von mehr als einem Stromverteilungssystem beliefert wird, müssen Sie sich vergewissern, daß die Sicherheitserdungen fest untereinander verbunden sind.

LAN-Kabel können gelegentlich gefährlichen Übergangsspannungen ausgesetzt werden (beispielsweise durch Blitz oder Störungen in dem Starkstromnetz des

Elektrizitätswerks). Bei der Handhabung exponierter Metallbestandteile des

Netzwerkes Vorsicht walten lassen.

Dieses Gerät enthält innen keine durch den Benutzer zu wartenden Teile. Wartungs-,

Anpassungs-, Instandhaltungs- oder Reparaturarbeiten dürfen nur von geschultem

Bedienungspersonal durchgeführt werden.

Dieses Gerät hat keinen Netzschalter; es wird beim Anschließen des Netzkabels eingeschaltet.

Considerazioni sulla sicurezza

Simboli di sicurezza

Simbolo di riferimento alla documentazione. Se il prodotto è contrassegnato da questo simbolo, fare riferimento alla documentazione sul prodotto per ulteriori informazioni su di esso.

La dicitura WARNING denota un pericolo che può causare lesioni o morte.

WARNING

CAUTION

La dicitura CAUTION denota un pericolo che può danneggiare le attrezzature.

Non procedere oltre un avviso di WARNING o di CAUTION prima di aver compreso le condizioni di rischio e aver provveduto alle misure del caso.

Questo prodotto è omologato nella classe di sicurezza I ed ha un terminale protettivo di collegamento a terra. Dev’essere installato un collegamento a terra di sicurezza, non interrompibile che vada dalla fonte d’alimentazione principale ai terminali d’entrata, al cavo d’alimentazione oppure al set cavo d’alimentazione fornito con il prodotto. Ogniqualvolta vi sia probabilità di danneggiamento della protezione, disinserite il cavo d’alimentazione fino a quando il collegamento a terra non sia stato ripristinato.

Per la messa a terra dei cavi LAN: se la vostra LAN copre un’area servita da più di un sistema di distribuzione elettrica, accertatevi che i collegamenti a terra di sicurezza siano ben collegati fra loro; i cavi LAN possono occasionalmente andare soggetti a pericolose tensioni transitorie

(ad esempio, provocate da lampi o disturbi nella griglia d’alimentazione della società elettrica); siate cauti nel toccare parti esposte in metallo della rete.

Nessun componente di questo prodotto può essere riparato dall’utente. Qualsiasi lavoro di riparazione, messa a punto, manutenzione o assistenza va effettuato esclusivamente da personale specializzato.

Questo apparato non possiede un commutatore principale; si mette scotto tensione all’inserirsi il cavo d’alimentazione.

Considerazioni sulla sicurezza 5

Consideraciones sobre seguridad

Símbolos de seguridad

WARNING

Símbolo de referencia a la documentación. Si el producto va marcado con este símbolo, consultar la documentación del producto a fin de obtener mayor información sobre el producto.

Una WARNING en la documentación señala un riesgo que podría resultar en lesiones o la muerte.

CAUTION

Una CAUTION en la documentación señala un riesgo que podría resultar en averías al equipo.

No proseguir después de un símbolo de WARNING o CAUTION hasta no haber entendido las condiciones peligrosas y haber tomado las medidas apropiadas.

Este aparato se enmarca dentro de la clase I de seguridad y se encuentra protegido por una borna de puesta a tierra. Es preciso que exista una puesta a tierra continua desde la toma de alimentación eléctrica hasta las bornas de los cables de entrada del aparato, el cable de alimentación o el juego de cable de alimentación suministrado. Si existe la probabilidad de que la protección a tierra haya sufrido desperfectos, desenchufar el cable de alimentación hasta haberse subsanado el problema.

Puesta a tierra del cable de la red local (LAN):

Si la LAN abarca un área cuyo suministro eléctrico proviene de más de una red de distribución de electricidad, cerciorarse de que las puestas a tierra estén conectadas entre sí de modo seguro.

Es posible que los cables de la LAN se vean sometidos de vez en cuando a voltajes momentáneos que entrañen peligro (rayos o alteraciones en la red de energía eléctrica). Manejar con precaución los componentes de metal de la LAN que estén al descubierto.

Este aparato no contiene pieza alguna susceptible de reparación por parte del usuario. Todas las reparaciones, ajustes o servicio de mantenimiento debe realizarlos solamente el técnico.

Este producto no tiene interruptor de potencia; se activa cuando se enchufa el cable de alimentación.

6 Consideraciones sobre seguridad

Safety Information

Safety Information 7

Regulatory Statements

FCC Statement (For U.S.A. Only)

Federal Communications Commission Radio Frequency Interference

Statement

Warning:

This equipment generates, uses, and can radiate radio frequency energy. If it is not installed and used in accordance with the instruction manual, it may cause interference to radio communications. It has been tested and found to comply with the limits for a Class A computing device pursuant to Part 15 of FCC Rules, which are designed to provide reasonable protection against such interference when operated in a commercial environment. Operation of this equipment in a residential area is likely to cause interference, in which case the user at his own expense will be required to take whatever measures may be required to correct the interference.

If this equipment causes interference to radio reception (which can be determined by unplugging the power cord from the equipment) try these measures: Re-orient the receiving antenna.

Relocate the equipment with respect to the receiver. Plug the equipment and receiver into different branch circuits. Consult your dealer or an experienced technician for additional suggestions.

VCCI Class 1 (For Japan Only)

N o t e

This is a class A product. In a domestic environment, this product may cause radio interference, in which case the user may be required to take adequate measures.

8 Regulatory Statements

Declaration of Conformity

The following Declaration of Conformity for the HP AdvanceStack 10Base-T

Hubs complies with ISO/IEC Guide 22 and EN 45014. The declaration identifies the product, the manufacturer’s name and address, and the applicable specifications that are recognized in the European community.

Declaration of Conformity 9

Index

Index

Symbols

50-pin telco connectors 1-15

50-pin/RJ-45 adapter 1-14

A

accessory kits 1-2

Activity LED 3-3 advanced features of HP Stack Manager 2-9

AdvanceSlot

See

Expansion Slot

AppleTalk 3-16 approaches to troubleshooting 4-2

ASCII console interface in out-of-band management 3-9

AUI cable minimum pin-out A-8

AUI Port Module 1-iv

AUI/Xcvr port LED 3-4

AUI/Xcvr slot 1-iv, 1-18, 3-2 authorized managers 3-11 configuring in HP Stack Manager 2-11 auto-segmentation 3-6 basic operation 3-6 intelligent segmentation recovery 3-6 late collision monitoring 3-6 automatic display of the chained hubs 2-7

B

back panel description 3-2 backup link configuration process D-4 configuring in HP Stack Manager 2-11 description D-2 example topologies D-8 identification D-5 indications of activation D-6 limitations D-3 operational notes D-3 reactivating the primary link D-7 basic features of HP Stack Manager 2-5

BBS obtaining software from 4-12

BNC connector 1-17

BOOTP C-6 example BOOTP table entry C-6 bulletin board obtaining software from 4-12

Index-2

C

cable

See

also interface cable management 1-19 specialized cable tie 1-19 cable tie using 1-19 cables distributed management chain A-3

HP cables for console connection A-3 hub-to-hub cascading A-6 modem cable pin-out A-10 network connections A-3

RS-232 cable supplied with hub A-10

RS-232 console port A-3 twisted-pair connector pin-outs A-4 cables and connectors A-2 cabling problems 4-7 cascading hub to hub connection 1-12 twisted-pair cable connection A-6 chain automatic display of the hubs 2-7 cable pin-outs A-5 cables to build it A-3 connection procedures 1-24 chaining the hubs distributed management connections 3-9 out-of-band management access 1-24 clearing the password 4-11 collision detection 3-5

Collision LED 3-3 communications settings screen 2-6

CompuServe obtaining files from 4-14 computer requirements for HP Stack Manager 2-3 configuring a backup link D-4 connect/disconnect function 2-6 connections computers and other devices 1-11 distributed management 3-8 hub to hub networking 1-12 hub to network backbone 1-13 network 1-11 out-of-band management 1-20 connector specifications B-2 connectors A-2

Console LED 3-3

console port cables for connecting A-3

HP cables A-3 customer service types of 4-12

D

Declaration of Conformity C-9

DECnet 3-15 default settings of the hub 2-12 descriptions front and back hub panels 3-2

HP Stack Manager 2-2 diagnosing with the LEDs 4-3 diagnostic tests 4-9 testing the hub only 4-9 testing the ports and links 4-9 testing twisted-pair cabling 4-10 distributed management 3-8 chain cables A-3 chain description 3-9

E

electrical specifications B-2 electromagnetic specifications B-3 enabling/disabling network ports 2-8 enhancements, firmware 3-19 environmental specifications B-2

Ethernet SNMP Module

LED pattern during self-test of 4-3 part of hub installation 1-3 slot location 3-2

See

SNMP module

Ethernet SNMP Module, features bulleted list of features 3-12 factory reset option 2-12

HP Stack Manager advanced features 2-9 intelligent segmentation recovery 3-6 late collision monitoring 3-6

MIB support 3-10 modem access for console 1-22 security features 3-11

Examples backup link topologies D-8

BOOTP table entry C-6

IP addressing scheme C-5

Exp Slot LED 3-3

Expansion Slot 3-5

Index

F

factory reset option in HP Stack Manager 2-12

Fault LED 3-3 fax using to get HP product information 4-15 firmware enhancements 3-19 frame relay 3-15 front of the hub description 3-2 illustration 1-iii port LEDs 3-4 reset button 3-4 status LEDs 3-3 ftp obtaining files from HP 4-13

H

help, in HP Stack Manager 2-5, 2-7 hot swapping the hub 1-v

Hourly support calling for 4-15 how the hub works 3-5 auto-segmentation 3-6 collision detection 3-5 link beat 3-7

HP cables for console connection A-3

HP Dial-a-LAN remote access server about 3-17

HP Ethernet SNMP Module

See

Ethernet SNMP Module

HP FIRST FAX Retrieval Service using 4-15

HP FTP Library Service using 4-13

HP Router Module about 3-15

HP Stack Manager advanced features 2-9 authorized managers function 2-11 automatic chain display 2-7 backup link function 2-11 basic description 2-2 basic features 2-5 basic serial access speed 2-6 communications settings function 2-6 computer requirements 2-3

Index-3

Index connect/disconnect function 2-6 factory reset option 2-12 higher serial access speeds 2-9 hub identification information 2-7 installation procedures 2-4

IP configuration function 2-10

LAN traffic statistics 2-7 modem access 2-9 network test function 2-12 online help 2-5, 2-7 part of distributed management 3-9 password function 2-10 port counters 2-8 port enable/disable 2-8 port status display 2-7 reset function 2-8 robust port control 2-11

RPS function 2-8 hub identification, in HP Stack Manager 2-7 hub to hub network connections 1-12 cascading the hubs 1-12 using the ThinLAN port 1-12

I

in-band (network) management description 3-9 included parts 1-2 installation problems 4-6 installing HP Stack Manager 2-4 installing the hub mounting procedures 1-5 network connections 1-11 out-of-band management connections 1-20 rack or cabinet mounting 1-6 summary of steps 1-2 verifying hub operation 1-4 wall mounting 1-10 intelligent hub

See

managing the hub intelligent segmentation recovery 3-6 setting in HP Stack Manager 2-11 interface

See

also cable

RS-232/V.24/V.28 3-15

RS-422/RS-449/V.36 3-15

V.35 3-15

X.21 3-15

Internet obtaining latest drivers from 4-13

Index-4 obtaining software from 4-12

Internet protocol 3-15

IP address C-4 globally administered addresses C-4 locally administered addresses C-4

IP configuration errors in 4-8 from HP Stack Manager 2-10

IPX address C-3

IPX test 4-10

L

LAN traffic statistics, in HP Stack Manager 2-7

LAPB 3-15 late collision monitoring 3-6 setting in HP Stack Manager 2-11

LEDs

Activity 3-3

AUI/Xcvr port 3-4

Collision 3-3

Console 3-3 detailed description 3-3 diagnosing the hub status 4-3

Exp Slot 3-3

Fault 3-3 pattern during self-test 4-3 patterns showing error conditions 4-4 port 3-4

Power 3-3 rapid flash rate 3-4

RPS 3-3

Security 3-3 slow flash rate 3-4

ThinLAN port 3-4 twisted-pair ports 3-4 verifying hub operation 1-4 link beat description 3-7 link pulse

See

link beat link test 4-9 list

Ethernet SNMP Module features 3-12 included parts 1-2 transceiver modules 3-14

M

managing the hub 3-8 in-band (network) management 3-9

network management features 3-10 out-of-band management 3-9

MIB support 3-10, B-3 modem cable pin-out A-10 modem connection out-of-band management 1-22 specifying in HP Stack Manager 2-9 mounting the hub 1-5 precautions 1-5 rack or cabinet 1-6 wall mounting 1-10

N

network addressing

IP address C-4

IPX address C-3 network connections

50-pin telco connectors 1-15

50-pin/RJ-45 adapter 1-14 cable management 1-19 hub to computer connections 1-11 hub to hub connections 1-12 hub to network backbone 1-13 port connections 1-14

RJ-45 connectors 1-15

ThinLAN connector 1-17 network management communication with the hub C-2 description 3-9

HP management product 3-10 non-HP 3-10 network ports counter tables 2-8 enabling and disabling 2-8 network tests running from HP Stack Manager 2-12

Novell NetWare C-3

O

online help, in HP Stack Manager 2-5, 2-7 operation of the hub, basic description 3-5 optional modules 3-12

Ethernet SNMP Module 3-12 transceiver modules 3-14 out-of-band management chain cables A-3 chain connection 1-24 connecting to the hub 1-20 description 3-9 direct serial connection 1-21 modem connection 1-22

RS-232 port pin-out A-9 out-of-band management

RS-232 port 1-iv

P

partition

See

auto-segmentation parts list 1-2 password protection 3-12 clearing the password 4-11 setting in HP Stack Manager 2-10 physical specifications of hubs B-2

Ping test 4-10 point to point

See

WAN port LEDs 3-4

AUI/Xcvr 3-4

ThinLAN 3-4 twisted-pair 3-4 port security 3-11 port status display, in HP Stack Manager 2-7 ports

AUI Port Module 1-iv connection procedures 1-14 enabling and disabling 2-8 network counter display 2-8 status display in HP Stack Manager 2-7

ThinLAN 1-iv twisted-pair 1-iv power cord 1-3 caution statement 1-4

Power LED 3-3

PPP 3-15 precautions for mounting the hub 1-5 procedures configuring a backup link D-4 connecting a modem 1-22 direct serial connection 1-21 hub installation 1-2 installing HP Stack Manager 2-4 network connections to the hub 1-11 network port connections 1-14 rack or cabinet mounting 1-6 wall mounting the hub 1-10 pulse, link

See

link beat

Index

Index-5

Index

R

rack or cabinet mounting 1-6 recommended cables A-3

Redundant Power Supply (RPS) from HP Stack Manager 2-8 on the back panel 3-5

Redundant Power Supply (RPS) LED 3-3

Regulatory statements C-8 reset button 3-4 resetting the hub effect on HP Stack Manager 2-8 from HP Stack Manager 2-8 reset button 3-4 troubleshooting procedure 4-9

RJ-45 connectors 1-15 robust port control 2-11 router module about 3-15

RPS LED 3-3

RS-232 console port 1-iv

S

Safety information C-2 security authorized managers 3-11 overview of features 3-10 password protection 3-12 port security 3-11

Security LED 3-3 segmentation automatic segmentation of ports 3-6 intelligent segmentation recovery 3-6 late collision monitoring 3-6 self-test

LED pattern during 4-3 serial connection for out-of-band management 1-21 slot

AUI/Xcvr 1-iv, 3-2

Ethernet SNMP Module 3-2

SmartBoot 3-16

SMDS 3-15

SNMP Module 3-15

See

Ethernet SNMP Module specialized cable tie 1-19 specifications connectors B-2 datacomm declarations B-3

Index-6 electrical B-2 electromagnetic B-3 environmental B-2

MIB support B-3 physical B-2

SQE test disable on external transceivers 1-18

Stack Manager

See

HP Stack Manager

Station address use in IPX address C-3 status LEDs description 3-3 summary installation steps 1-2

T

technical support types of 4-12 testing ports and links 4-9 testing twisted-pair cabling 4-10

ThinLAN cable requirements A-7

ThinLAN connections 1-17

ThinLAN port 1-iv cable requirements A-7

ThinLAN port LED 3-4 topology faults 4-8 transceiver modules list of available transceivers 3-14 part of hub installation 1-3 transceivers, external

SQE test requirement 1-18 troubleshooting approaches 4-2 cabling problems 4-7 diagnosing with the LEDs 4-3 diagnostic tests 4-9 installation problems 4-6

IP configuration errors 4-8

IPX test 4-10

LED pattern during self-test 4-3

LED patterns showing errors 4-4 link test 4-9

Ping test 4-10 testing the hub 4-9 testing the ports and links 4-9 testing the twisted-pair cables 4-10 topology faults 4-8 unusual network activity 4-8

twisted-pair cable hub-to-computer connection A-4 hub-to-hub connection A-6 hub-to-hub management chain A-5 pin assignments A-7 pin-outs A-4 twisted-pair cabling testing 4-10 twisted-pair port LEDs 3-4 twisted-pair ports 1-iv

50-pin telco connectors 1-15

50-pin/RJ-45 adapter 1-14 connection procedures 1-14

RJ-45 connectors 1-15

U

unusual network activity 4-8

V

verifying hub operation 1-4

W

wall mounting the hub 1-10 warranty summary statement B-3

World Wide Web obtaining software from 4-12

WWW obtaining software from 4-12

X

X.25 3-15

XNS/IPX 3-15

Index

Index-7

© Copyright 1995

Hewlett-Packard Company

Printed in Singapore 10/95

Manual Part Number

5964-4601

*5964-4601*

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