HP AdvanceStack 208, AdvanceStack 224 Installation And Reference Manual

Installationand
Reference Guide

HPJ3175A
HPJ3177A

HPAdvanceStack
Switch 208/224

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HP Customer Support Services

How to get the latest software/agent firmware

You can download from the World Wide Web, HP FTP Library Service, CompuServe,
and HP BBS a compressed file (j3178xx.exe) containing the latest version of the HP
Switch 208/224 Management Module software and proprietary MIB. After you down­load the file, extract the file by typing
For example, j317801 [Enter].

World Wid e Web

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

Select the “Support” section.
From this web site, you can also download information on the HP networking prod-

ucts. If you have a growing network, download the Designing HP AdvanceStack
Workgroup Networks Guide or call 1-80 0-752-0900 in the U.S. to receive a copy through
the mail.

filename

and pressing [Enter].

HP FTP L ibrary Service

1. FTP to Internet IP Address — ftp ftp.hp.com.

2. Log in as anonymous and press [Return] at the password pro m pt.

3. Enter bin to set the transfer type.

4. Enter cd /pub/networking/software.

5. Enter get

CompuServe

1. Login to CompuServe.

2. Go to the “hp” service.

3. Select “HP Systems, Disks, Tapes, etc.”

4. Select “Networking Products” library.

5. Download

HP BBS

Set your modem to no parity, e ight bits, 1 st op bit, set speed u p to 14 400 bps, and with
your telecomm unicati on progr am (e.g. , Win dows Termi nal) dial [phone] in the
U.S. to get the latest software for your HP networking product. For other countries,
see http://www.hp.com/cposupport/eschome.html.

filename

filename

to transfer the file to your computer, then quit.

and then quit.

✂

(over for more services)

Obtai n the latest consol e code ( j317 8xx. exe) from:

HP FTP Library: ftp ftp-boi.external.hp.com
World Wide Web: http ://w w w .hp.com/go/networ k_city
HP BBS: [phone]

(over)

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HP FIRST Fax Retrieval Service

HP FIRST is an automated fax retr ieval ser vice th at is avail able 24 hours a day, seven
days a week. HP FIRST provides information on the following topics:

■ Product information

■ Troubleshooting instructions

■ Technical review s and articles

■ Configuration information

To access HP FIRST, dial one of the following phone numbers:

Location Phone Number

U.S. and Canad a Only Dial 1 (80 0) 333-1 917 with your fa x mac hine o r to uch -tone phon e

and press 1.
Outside the U.S. and Canada Dial 1 [phone] from your fax machine and press 9.
To re c eiv e a li st of c ur re nt l y a va i lab l e docu me nt s , e nt er do cu me nt n um ber 1 99 41. Th e inf o rm ati o n

you requested will be sent to you by return fax. For other countries, see http://www.hp.com/
cposupport/eschome.html.

Additional HP Support Services

In addition to the above services, you can purchase various HP telephone support
services which provide you expert HP technical assistance:

■ Network Phone-In Support provides you support at an hourly rate. In the U.S.,

call 1-800-790- 5544. In other countries, please contact your local HP Response
Center to see if this service is available in your country.

■ HP SupportPack Comprehensive Network Support provides complete prob-

lem resolution for medium to large interconnected local and wide area
networks. Contact your HP Authorized Reseller or the nearest HP Sales and
Support Office for more information.

HP offers other hardware support services. Please contact your resel ler for more
information.

✂

CompuServ e: Go hpsys

Lib 7.
Download j3178xx.exe

Network Phone-In
Support (hourly):

1-800-790-5544

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HP AdvanceStack Switch 208/224

Installation and Reference Guide

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© Copyright 1997 Hewlett-Packard Company
All Rights Reserved.

This document contains information which is protected by
copyright. Reproduction, adaptation, or translation without
prior permis sion is prohibit ed, except as all ow ed under the
copyright laws.

Publ ication Number

5966-5225
Edition 1
March 1997

Applicable Products

HP J3175A Ad vanceStack Switch 208T
HP J3177A Ad vanceStack Switch 224T

Disclaimer

The information contained in this document is subject to
change wi th out 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 liabl e for er rors con tained herein or for inc ide n t al or
conseq uential damages in con nection with the furnis hing,
perfor mance, o r use of this materi al.

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

Warran ty

A copy of the specifi c warranty t erms appli cable to yo ur
Hewlett-Packard products and repl acement parts can be
obtained from your HP Sal es and Service Office or
authoriz ed deal er .

Hewlett-Packard Company
8000 Foothills Boulevard, m/s 5552
Rosevil le, California 95747-5552
http://www.hp.com/go/network_city

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Contents

1 Installing the Switch 208/224

Included P a rts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Installation Steps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1- 2

1. Prepare the Installatio n S ite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

2. Install Any Optional Modules . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

3. Verify the Switch’s Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6

4. Mount the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

5. Connect the Switch to a Power Source . . . . . . . . . . . . . . . . . . . . . . 1-12

6. Connect the Network Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Sample Network Topologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

As a Segment Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

As a Desktop Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

Connecting to a Backbone Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17

Cable Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

Where to Go From Here . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

2 Switch 208/224 Description

Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2- 1

Front of the Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Network Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2- 2

LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Management Slot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2- 4

Back of the Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Power Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Redundant Power Supply (RPS) Connector . . . . . . . . . . . . . . . . . . . . . 2- 5

Expansion Slot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Switch Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Address Tabl e Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Simultaneous Network Communic ations . . . . . . . . . . . . . . . . . . . . . . . 2-7

iii

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3 Troubleshooting

Solu tions to Common Problem s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

LED Error Indication s . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3- 3

Diagnostic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3- 4

Testing the Switc h . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Testing Twisted-Pair Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Testing End-to-End Network Communications . . . . . . . . . . . . . . . . . . 3-5

Testing Switch-to-Device Network Communications . . . . . . . . . . . . . 3-5

Resetting the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3- 6

HP Customer Support Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

A Cables and Connectors

Twisted-Pair Cable/Connector Pin-Outs . . . . . . . . . . . . . . . . . . . . . . . A-1

Twisted-Pair Cable for Switch (MDI-X) to

Computer (MDI) Network Connection . . . . . . . . . . . . . . . . . . . . . . . . A-2

Twisted-Pair Cable for Switch (MDI-X) to

Hub or Switch (MDI-X) Network Connection . . . . . . . . . . . . . . . . . . . A-3

Twisted-Pair Cable Pin Assignments . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Fiber-Optic Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

B Specificati ons

C Safety and Regulatory Statements

Mounting Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

Power Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2

Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3

Safety Information (Japanese) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C- 8

Regulatory Statem ents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-9

Declaration of Conformity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-10

Index

iv

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Installing the Switch 208/224

The HP AdvanceStack Switch 208T and 224T are low-latency, hi gh -speed
switches that you can use to buil d high-performance switched workgr o u p
networks.

The two switch models are:

HP J3175A AdvanceStack Switch 208T

1

Install ing the S witch 208/2 24

HP J3177A AdvanceStack Switch 224T

Throughout this manual, these switches will be abbreviated as the Switch 208T
and Switch 224T, or, when common characteristi cs are being describe d, as
the Switch 208/224.

The Switch 208T and 224T have ei ght and twenty-four 10Bas e-T ports, res pec­tively, and two 100Ba se-T ports: one fixed RJ-45 port and one transce iver slot
for installing an HP 100Base-TX or 100Base-FX Transceiver Module.

With these switches you can build a switch ed n etwork infrastructure by
connecting hubs or other switches, or you can connect computers, printers,
and servers to these switches to provide dedicated bandwidth to those
devices.

This chapter shows you how to ins t all your Switch 208T or 224T.

1-1

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Insta lli n g th e S w it ch 20 8/ 22 4

Includ ed Parts

Included Parts

The Switch 2 08T and 224T have the follow ing components s hipped with them :

■ HP AdvanceStack Switch 208/224 Insta llation and Reference Guide

(5964-5225), this manual

■ Warranty booklet

Install ing the S witch 208/2 24

■ Accessory kit (5063-8570)

• two mounting brackets

• two ca b le ties

• four 10 mm M3 thread-formin g screws to attach the mounting
brackets to the switch

• four 5/8-inch number 12-24 screws to attach the switch to a rack

■ Power cord, one of the following:

Australi a/New Zealand/China (8120-6810)
Denmark (8120-6814)
Europe (8120-6811)
Japan (8120-6798)
Switzerland (8120-6815)
United Kin gdom (8120-6809)
United States/Canada (8120-6812)

Installation Steps

Follow these easy s teps to install your switch . The rest of this chapter provides
details on these steps.

1. Prepare the installation site

2. In st all any o p t ional mo dules

3. Verify that the switch passes self test

4. Mount the switch

5. Connect power to the switch

6. Connect the network cables

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Instal ling the Switch 208/224

Installation Steps

1. Prepare the Installat ion Sit e

■ Cabling Infrastructure - Ensure that the cabling infrastructure meet s

the necessary network spe cifications:

• For the 10Base-T ports, use category 3, 4, or 5, four-pair, 100 ohm UTP
(unshielded twisted-pair) cables. Cable lengths can be up to 100
meters for category 3 or 4, and 150 meters for categor y 5. For
connecting these ports to end nodes, use “straight-through” cable; for
connecting to hubs or other switches, use “crossover” cable. See
appendix A, “Cables and Connectors” for more informati on

• For the fixed 100Base-TX po rt and 100B ase -TX transce ivers th at you
install in th e t rans ceiver slot, use category 5, 100-ohm UTP cables.
Cable lengths can be up to 100 meters.

For connecting these ports to end nodes, use “straight-through” cable;
for connecting to hubs and switches, use “crossover” cable.

• For 100Base-FX transceivers that you install in th e transceiver slot,
use 1300 nm multi-mode fiber-optic cables that are fitted with SC
connectors, and confor m to ISO/IEC 793-2 type B1 and ITU-T G.652
standards. Cable lengths can be up to 1 kilometer.

■ Installation Precautions -

• Before instal ling the switch, pl an it s locati on an d or ienta tion rel ativ e
to other devices and equipment. In the front of the switch, leave at
least 3 inches (7.6 cm) of space for the twis ted -p air and fiber-optic
cabling. In the back, leave at least 1 1/2 inches (3. 8 cm) of space for
the power cord.

Install ing the S witch 208/2 24

• Caution: Ensure that the switch does not overload the power
circuits, wiring, and over-current protection. To determine the possi­bility of overloading the supply circuits, add together the ampere
ratings of all devices installed on the same circuit as the switch and
compare the total with the rating limit for the circuit. The maximum
ampere ratings are usual ly print ed on t he device s near the A C power
connectors.

• Caution: Ensu re t ha t t h e po w e r source circuits a re prope rl y
grounded. See the Safety Statements at the end of this manual.

• Do not install the switch in an environme nt where the operating
ambient temperature might exceed 55°C (131°F).

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

1-3

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Insta lli n g th e S w it ch 20 8/ 22 4

Installation Steps

2. Install Any Optional Mo du les

Install optional modules into the Management Slot, Expansion Slot, or trans­ceiver slot b y following the instr uctions in the manuals that accompany these
products.

Each of the slot co vers can be removed wi th either a fl at-bl aded or Torx T-10
screwdriver. Retain the slot covers for future use.

Install ing the S witch 208/2 24

Caution To avoid damage to circuitry in the switch and any modules, always unplug

the power from the switch before installing a module into the Expansion Slot,
Management Slot, or tr an sceiver slot, and when remo ving any modules.

If you do not install an optional module, make sure that the cover plate is st ill
attached over the slot for safe operation and proper switch cooling.

Installing Modules

Front of Switch

Management Slot

HP J3178A AdvanceStack Sw itch 208/224 Management Modul e

1-4

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Instal ling the Switch 208/224

Expansion Slot

supported expansion module

Installation Steps

Install ing the S witch 208/2 24

Back of Switch

Note An expansion slot module uses the switch port 1 circuitry to communicate

with the other switch ports. Therefore, installing an expansion module
disables port 1 as reflected by the LED on the front of the switch.

Installing Transceivers

Blue color bar with “100 T” in it ,
and “B”, or la ter, mo del num ber
identi fi es a correct t ransceiver
for the Switch 208T and 224T

Install either of these HP 100Base-T transceiver modules into the transceiver
slot:

- HP J3192B 100Base-TX Twisted-Pair Transceiver Module

- HP J3193B 100Base-FX Fiber-Optic Transceiver Module

Cautions Make sure yo u install only t he “B” model or later versions of these

100Base-T transceiver modules into the Switch 208/224.
Do not install any 100VG transceiver modules in this slot.

1-5

p

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Insta lli n g th e S w it ch 20 8/ 22 4

Installation Steps

3. Verify the Switch’s Oper at ion

After you have installed any modules, but before mounting the switch in its
network location, you should first verify that it is working properly by plugging
it into a power source and verifying that it passes its self test.

1. Connect the po wer cord supplied with the switch t o the power conn ector
on the back of the switch, and then into a properly grounded electrical
outlet.

Install ing the S witch 208/2 24

Connect power cord to

ower connector.

Note The Switch 208/2 24 does no t have a power switch . It is powered on whe n the

power cord is connected to the switch and to a power source.
If your installation requires a different power cord than the one supplied with

the switch, 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 switch.

2. Check the LEDs on the switch’s front panel (and on the Switch Manage-

ment Module, if one is installed in the switch). The LED behavior is
described on the next page.

switch LEDs

1-6

Switch Management Module LEDs

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Instal ling the Switch 208/224

Installation Steps

When the switch is powered on, it performs its diagnostic self test. With
the Switch Management Module installed, the self test takes appro x i­mately 15 seconds to complete. Without the Switch Management Module,
the test completes in approximately 4 seconds.

LED Behavior:

During the self test:

• Initially, all LEDs are on.

• With a Management Module installed, the switch port LEDs al l go off

after approximately 10 seconds, and the Management Module Self
Test and Fault LEDs stay on for an additional 5 to 7 seconds.

When the self test completes successfully:

• The Power LED and, if an RPS is connected, the RPS LED remain on.

The “100” LED for port A also stays on.

• The Fault LED on the switch, and the Self Test and Fault LEDs on the

Management Module go off.

• The port LEDs go into their normal operational mode, if they are

connected to active network devices.

If the LED di splay is differ en t than what is d escribed above , especially if
any Fault LEDs stay on for more than 30 seconds or flash, the self test has
not completed correctly. Refer to chapter 3, “Troubleshooting” for diag­nostic help.

Install ing the S witch 208/2 24

1-7

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Insta lli n g th e S w it ch 20 8/ 22 4

Installation Steps

4. Mount the Sw itch

After the modules are inserted and you have verified that the switch passes
self test, you are ready to mount the switch in a stable location. The Switch
208/224 can be mounted in three ways:

■ in a rack or cabinet

■ on a wall

■ on a horizontal surface

Install ing the S witch 208/2 24

Mounting the Switch in a Rack or Cabinet

The Switch 208/224 is designed to be mounted in any EIA-standard 19-inch
telco equipment rack. To order a rack for your switch, call HP at 1-800-538­8787 to order product number HP 46298D.

For safe operation, please read the mounting precautions in

appendix C, “Safety and Regulatory” before mounting a switch.

1. Use a #1 Phillips (cross-head) or Pozidriv screwdriver and attach the
mounting brackets to the switch with the included 10-mm M3 thread­forming screws .

10 mm
M3
scre ws

1-8

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Instal ling the Switch 208/224

Installation Steps

2. Partia lly inst all a scre w (5/8-in ch number 12-2 4) into the top hole of a pair
of holes that are 0.5 in ch es apart in each rack/cabi ne t uprigh t as shown
in the illustration below. Tighten each screw enough to support the weight
of the switch, approximately two turns. Ensure that the screws are at the
same level in each u p right.

Insert a screw into
the top hole of a
close (0.5-inch)

3. Place the switc h i n the ra ck and lower it so the notches i n the botto m of
the bracket sli de onto the screws . Tighten thes e screws- be c are ful n ot to
overtighten.

Install ing the S witch 208/2 24

1-9

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Insta lli n g th e S w it ch 20 8/ 22 4

Installation Steps

4. Install the o ther nu mber 12-24 s crew in to the uppe r hole in eac h bracket .
Tighten these screws-be careful not to overtight e n.

Install ing the S witch 208/2 24

install
additional
screw

1-10

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Instal ling the Switch 208/224

Installation Steps

Mounting the Switch on a Wall

You can mount the switch on a wall as shown in the illustration below. Note
that the switch should be mounted only to a wall or wood surface that is at
least 1/2-inch plywood or its equivalent.

1. Using a Phil lips (cross- head) or Pozi driv screw driver w ith the 1 0-mm M3
thread-forming screws included in the accessory kit, attach the mounting
brackets to the switch as shown in the illustration below.

2. Attach the switch to the wall or wood surface with 5/8-i nch number 12
wood screws (not included}.

Install ing the S witch 208/2 24

Mounting the Switch on a Horizontal Surface

Place the switch on a table or oth er horizontal surface. Use a sturdy surface
in an uncluttered area. You may want to secure the networ ki n g cab les and
switch power cord to the table leg or other part of t he surface structure to
help prevent people from trip p in g over the cords.

Caution Make sure the air flow is not restricted around the sides and back of the switch,

and around the HP J2692A Redundant Power Supply, if used.

1-11

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Insta lli n g th e S w it ch 20 8/ 22 4

Installation Steps

5. Connect the Swi tch to a Powe r Sour ce

1. (Optional.) This product supports use of the HP J2962A Redundant
Power Supply (RPS), which can help ensure continuous switch operation
in the event of a power failure. If you have this HP RPS, connect the RPS
to the switch now and connect the RPS to an appropriate AC power
source.

Install ing the S witch 208/2 24

Caution When installed, the RPS is used in place of the standard power cord, so make

sure you disconnect the stan da rd po wer cor d from the switch b efo re you
connect the RPS. Using both the standard power cord and the RPS at the same

time could damage the switch’s components.

Back of Switch

Back of RPS

For information on how to install and connect the HP RPS, refer to the
documentation supplied with the RPS.

2. If you are no t using an RPS, plu g the included power cord into the switch' s
power cord receptacle and into an AC power source as shown below.

3. Re-check the LEDs during self test. Initially, all LEDs are on. After the
four-second self test (or 15 second self test with Management Module),
only the Power and p o r t A “100” LEDs (and o pt io n ally the RPS LED) are
on. See “LED Behavior” on page 7.

1-12

power receptacle
on the back of the switch

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Instal ling the Switch 208/224

Installation Steps

6. Connect the Network Cables

Using RJ-45 Connectors (10 Mbit/s and 100 Mbit/s ports)

To conne ct:

Push the RJ-45 plug into the RJ-45 jack

until the tab on the plug clicks into place.

When power is on for the switch and the
connected device, the Port LED should
light to confirm a powered-on device

(for example, an end node) is at the other

end of the cable.

To disconnect:

Press the small tab on the plug and
pull the plug out of the jack.

Caution:

Do not connect a 10 Mbit/s network
into either of the 100 Mbit /s ports.

Unshielded twisted-pair cable:
Category 3, 4, or 5 for 10 Mbit/s ports
Category 5 only f or 100 Mbit/s por ts

Cat 3, 4 maximum distance: 100 meters
Cat 5 maximum dist ance: 150 meter s fo r 10 BT

100 meters for 100BT

RJ-45 plug

Install ing the S witch 208/2 24

100Base-T Xcvr Slot

An optional 100Base-T transceiver module can be installed in the switc h’s
transceiver (Xcvr) slot to provide additional connectivity choices, including:

HP 100Base- FX Fiber-Optic Transceiver Modul e

(HP J3193B)

Maximum Dist ance: 1 kil om eter
HP 100Base-TX Tw isted-Pair Tr ansceiver Modul

(HP J3192B)
Category 5 maxi m um distance: 100 met er s

See the documentation accomp an yin g th e optional transceiver modules for
cabling configurations for those modules.

e

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Insta lli n g th e S w it ch 20 8/ 22 4

Installation Steps

If the Port LED does not go on when the network cable is connected to the
port, use this table to solve the problem:

Condition Diagnost ic Tip

Port LED is still off when
a cable is
connected

Install ing the S witch 208/2 24

Try the f ollowing:

• For the indicat ed port, verify that bot h ends of the cabl ing,
switch and connected device, are snug.

• Verify the conne cted device and swi tch are both powered
on and operating correctly.

• Verify that you have used the correct cable type for the
connecti on. For t wis ted-p air cab le c onne ctions , in ge ner­al, for connecting to an end node, use “straight-through”
cable; f or connectin g to hubs or other switches, use
“crossover” cabl e.

• Verify t hat you have not connected a 10 Mbit /s network
cable into one of the 100 Mbit/s ports.

• Verify t hat if you are con necting the ca ble to port 1, the
switch does n ot have an optional expansion module in­stalled in the expansion slot in the back of t he sw itch.
When an exp ansion modu le i s inst alle d, it uses the port 1
circui try to communicate with the rest of the network
through th e switch and the port 1 RJ-45 connecto r is thus
disable d.

• Use a different port or a different cable.

If you ha ve installed t he Switch Man agement Modul e, you can us e
the console inter face or HP AdvanceStack Assi stant netw ork
management software to determine the state of the port and re­enable the port if necessary.

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Instal ling the Switch 208/224

Sample Network Topo logies

Sample Network Topologies

This section shows you a few sample network topologies in which the Switch
208/224 is impl emented. See the document Designing HP AdvanceStack
Workgroup Netw orks, which can be found on the HP network products World
Wide Web site, http: //www.hp.com/go/network_city, and on the CD-ROM
supplied with the Swit ch Management Module. You may also be able to obtai n
a printed copy of this document from your HP-authorized LAN dealer.

As a Segment Switch

Install ing the S witch 208/2 24

100 Base-FX
fiber- optic
cable to

twisted-pair
“straigh t- through ”
cables

Server

categ or y 5 twisted-p air “straigh t- through ” cable

Switch 208T

twisted-pair “crossover” cabl es

Ethernet
Hubs

PCs,
printers
, and
local

In general, t he Switch 208T is designe d to be used as a segment switch. That
it, with its lar ge ad dress table (8000 MAC address es) an d hig h perfo rmance,
it is ideal for interconnecting network segments -- simply connect the network
hubs that form those segments to the Switch.

In the illustration above, two Ethernet hubs with PCs, printers, and local
servers attached, are bo t h connected to a Switch 208T . The devices attached
to the two hubs can now communicate with each other through the switch.
They can als o all communicate with the ser ver that is c onnected to the s witch
through its 100Base-TX port. Connecting the server to the 100 Mbit/s port
allows a large number of users to access the server without causi ng networ k
congestion.

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Insta lli n g th e S w it ch 20 8/ 22 4

Sample Net wo rk Topologies

The switch, in turn, is connected to a network backbone through fiber-optic
cabling connected to a 100Base-FX transcei ver installed in the switch . Now,
all the device s in th is netw ork can access other network res o urces that are
connected elsewhere on the network backbone.

As a Desktop Switch

Install ing the S witch 208/2 24

twisted-pair

“straight­through” cables

Server

Switch 224T

PCs and peripherals

Switch 224T is designed to be used as a desktop switch to which end nodes,
printers and other peripherals, and servers are directly connected. Although,
since it has the same large 8000 address table and high pe rfor mance as the
Switch 208T, it also can be used as a segment switch. Or, you could , of course,
connect a combination of end nodes and hubs to the Switch 224T ports.

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Instal ling the Switch 208/224

Sample Network Topo logies

FDDI Campus
Backbone

Connecting to a Backbone Switch

100Base-FX
cable

Install ing the S witch 208/2 24

Switch 224T

Switch 2000

100Base -FX
cable

Switch 208T

The simpler segment and desktop networks shown in the previous two
examples can easi ly b e combine d and ex panded . For ex ample, you co uld us e
an HP Switch 2000 to interconnect each of your smaller switched workgroups
to form a larger switched n etwork . All the devices in this network can
communicate with each other . With an FDDI Module, for example, in the
Switch 2000, the entire switched topology could be connected to a campus
backbone, as shown in the illustration above.

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Insta lli n g th e S w it ch 20 8/ 22 4

Cable Management

Cable Management

The Switch 208/224 has been designed to help you with the problem of
managing your network cables. On both sides of the front of each switch are
two holes that ac cept a ca ble ti e to tie-w rap you r cables . Simply slide th e end
of the cable tie into the top or bottom hole until it appears out the other hole
as shown in the illustration below. Then use the cable tie to bundle the

Install ing the S witch 208/2 24

network cables together

1-18

Where to Go From Here

Your switch is now correctly installed and is able to send and receive data
between end nodes, servers, and printers.

The Switch 208/224 are plug-and-communicate network devices requiring no
configuration. If you wish to manage the switch from an SNMP-base d network
management station, you will need to install an HP Swi t ch 208/224 Manage­ment Module i n the s witch. If the management is over an I P n etwork, yo u will
also need to configure the IP addr ess on the switch; see the HP Switch 208/
224 Management Module Installation and Reference Guide for information
on how to use the switch console inter f ace or HP Advan ceStack Assistant to
configure the IP address. For Novell Netware (IPX) networks, no configura­tion is neces sary to m anage the switch- -the net work addre ss is au tomatical ly
generated.

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Switc h 208 /224 Description

The HP AdvanceStack Switch 208T and 224T are high-speed, multiport
switches that can be used to build switched networks with both Ethernet/
IEEE 802.3 a nd 100Base-T devices, i ncluding computers, servers , and printers,
as well as other network infrastructure devices: hubs, bridges, other switches,
and routers.

This chapter describes your HP AdvanceStack Switch 208T and 224T
including:

2

Swit c h 208/ 224 Descr ipt io n

■ Features

■ Front and back of the switches

■ Switch operation

Features

The features of the Switch 208T and 224T include:

■ All ports are enabl ed -- just connect th e network cables to act ive network

devices and your switched network is operational.

■ Network addresses are autom atically learned and st ored in the sw itch es

8000-addres s for warding tab le.

■ All network ports (fixed and transceiver) operate in half-duplex mode at

the speed in d icated on the switch labeling, either 10 Mbit/s or 100 Mbit/s.

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Switch 208/224 Description

Front of the Switches

Front of the Switches

LED indicating
Port 1 is disable d

LEDs for
10 Mbit/s ports

Power
LED

Fault
LED

4 LEDs for
expansion module

RPS
LED

LEDs for
100 Mbit/s po rts

HP J3175A

Switch 208T

HP J3177A

Swit c h 208/ 224 Descr ipt io n

Switch 224T

slot for
Switch Management Module

100 Mbit/s ports:

- one fixed RJ-45

- one

10 Mbit/s RJ-45ports

Networ k Ports

■ 8 or 24 10 Mbit/s RJ-45 Ethernet/IEEE 802.3 ports

■ one fixed 100 Mbit /s RJ-45 100Base-T X port

■ one 100 Mbit/s transceiver slot for inst alling HP 100Base-TX or 100Base-

FX transceivers

All the tw isted-pair ports are wired as MDI-X. Therefore, to c onnect end nodes

or other MDI-type devices to these ports, use “straight-through” twisted-pair
cable; to connect hubs, switches, or other MDI-X-type devices to these ports,
use “crossover” twisted-pair cable. See appendix A, “Cables and Connectors”
for descript io n s of these cab les.

The cabling to the transceiver port depends on the type of transceiver
installed. For more information, refer to the manual that came with the
transceiver .

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Switch 208/224 Des cription

Front of the Switches

LEDs

LED State Meaning

Powe r (g reen) Off The switch is not receiving power.

On The switch is receiving power.

Fault On The switch has failed its self-test after be ing powered on or reset.

Flashing
Slowly*

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

RPS Off This switch is not r eceiving pow er from the HP J2962A Redundant Power Sup ply

On This switch is receiving power from the connected RPS.
Flashing

Slowly*

Expansion Slot
Module LEDs (4)

(port 1 disabled)

Off The por t 1 RJ -45 c onne ct or is av aila bl e to b e u sed fo r conn ecti ng a ne twor k dev ic e

100 Mbit/s Ports
A or B Off No active network cable is connected to the port. For port B, could indicate that

On Indica tes th at an opt ional modul e is inst all ed in the expa nsion slot in th e back of the

An incorrect transceiver has been installed in the transcei ver slot, or a connected
RPS has a fai lure. The correspond ing LED (transceiver port or RPS) wil l also flash.

(RPS).

An erro r h as occurr ed on th e RPS co nnec te d t o the swi tc h. See t he docum entat io n
provided with the RPS for troubleshooting.

The behavi or of th ese fou r LEDs de pends on the module i nserted i nto t he Expansi on
Slot. See the module manual for a descriptio n of these LED s.

switch. Any expansion modules insta lled into the switch use the port 1 circuitry to
communicate with the networ k through the switch. Therefore, when a module is
install ed, the port 1 RJ-45 connect or is c an not be us ed to conn ect a networ k device .

to the switch.

there is no tra nsceiver inst alled. Could al so indi cate t hat the port has been disable d
through the switch console or HP AdvanceStack Assistant (port configuration
changes require a Switch Management Module to be install ed).

Swit c h 208/ 224 Descr ipt io n

On During t he first 3 seconds after an active network cable is connected or after a

Flickering Indicates activity on the port.
Flashing

Slowly*
100 On The port is operating in 100 Mbit/s mode.
Fdx On The port is operating in full-duplex mode.

Off The port is operating is half-duplex m ode, or is not operating.

switch reset, indicates t he port is enabled and receiving a link beat signal . Aft er 3
seconds, On continuously indicates a saturate d network segment on the port.

This condition will only occur on the 100 M bit/s port B (the tr ansceive r port), if an
incorrect transceiver is insta lled in the slot.

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Switch 208/224 Description

Front of the Switches

LED State Meaning

10 Mbit/s Por ts
Port Number Off The port is not receiving the link beat signal from the attached node or the port is

disabl ed.
On The port i s enabled and link beat is detected from the attached node.
Flickering Indicates activity on the port.

* The slow fla sh behavior is a regular pulse once every 1.6 seconds, appr oximately.

Management Slot

The Management Slot in the front of the switch allows you to install an HP
Switch 208/224 Manageme nt Module. When installed, the Switch Management
Module adds these features to your switch:

Management Module Features

Swit c h 208/ 224 Descr ipt io n

■ Access to the s witch cons ole from which yo u can configu re, monitor, and

troubleshoot the switch

■ Access to the switch from SNMP network management programs, such

as HP AdvanceStack Assistant, for controlling the switch using an
advanced, graphics-based interface

■ Configurable full-duplex port operation

■ Configurable support for the Spanning Tree Protocol for switched

networks

■ Configurable MAC Address Table aging

For more informati on on the HP Switch 208/2 24 Management Module, co ntact
your HP-author ized LAN resell er, or you can find out about HP s w itch es and
their accessories, and other HP networking products by visiting the World
Wide Web site http://www.hp.com/go/network_city .

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Switch 208/224 Des cription

Back of the Switches

Back of the Sw it ch es

Power Connectors

The switch d oes not have a power switch; it is powered on when i t is connected
to either an active AC power sou rce, using the AC power connector , or an
active HP RPS, using the RPS power connector. Using the AC power
connector, the switch automatically adjusts to any voltage between 100-127
and 200-240 volts and either 50 or 60 Hz. There are no voltage rang e settings
required.

Swit c h 208/ 224 Descr ipt io n

RPS power connector

AC power connector

Redunda nt P ower Supply (RP S) Connecto r

The RPS connector allows you to connect this switch to the HP J2962A
Redundant Power Supply. A single RPS shares the load with up to 4 switches.
The RPS has redundant power supplies to keep the switch up and running; it

is used in place of the switch’ s sta n da rd power cab le ( NOT in add ition to it).

Expansio n Slot

The Expansion Slot is used to add connectivity/functionality through modules
such as the HP J3138A AdvanceStack Internet Router Module to the switch.
Other modules may be available. Contact your HP-authorized dealer or
reseller for more infor matio n.

Expansion slot modules have a color ed ex tractor han dl es that match a co lo r
bar on the switch. Befor e in ser ting a module, verify that the color matches.

Expansion Slot

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Switch 208/224 Description

Switch Ope ration

Switch Operation

Address Table Operation

Address Learning. As devices are connected to the switch ports, either
directly or through hubs or other switches that are connect to the switch, the
MAC addresses of those devices are learned automatically and stored in the

Switch 208/224’ s 8000-entry address table. The switch also iden tifies the
number of the port on which each address is learned so it knows the network
location of each device.

Forwarding, Filtering, Flooding. When the switch receives a packet, it
determines the destination address, looks for the address in the address table.
Based on the port locati on of that address, the swit ch then determines whether
to forward, filter-out, or flood the packet.

■ forward - if the destination address is on a different port than the one on

which the packet was recei ved, the packet is forwar ded to the destination

Swit c h 208/ 224 Descr ipt io n

port and on to the destination device.

■ filter out - if the destination address is on the same port as the one on

which the packet was received, the packet is filtered out. The switch
thereby isolates local traffic so the rest of the networ k connected to t he
switch does not lose bandwidth dealing with unnecessary traffic.

■ flood - whenever a new destination address is found in a packet, the

destination address will not yet be in the switch’s address table and the
Switch 208/224 cannot know whether to forward or filter out the packet.
In this case, it sends the packet to all the ports. This is referred to as
“flooding”. When the destination device receives the packet, it replies, and
the switch learns the new address from the reply packet . Then, all future
packets destined for that ad d ress are forwarded or filtered out approp ri ­ately.

Netw ork Moves and Changes. When devices are moved in the network,
and become connecte d to a di fferent switch p ort, the Switch 208/224 au tomat­ically recogn izes the change an d updates the add ress table w ith the new port
location of th e dev ice. Comm unicati on wit h the device is automati cally ma in­tained, without any address table manipulation being required.

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Switch 208/224 Des cription

Simultan eous Network Communications

In addition to tr affic isolation benef its provided by the Swit ch 208/224 address
table operatio n, the switch also enhanc es netw ork performance because it
can conduct multiple, simultaneous network connections. In the case of the
Switch 224T, with its 26 ports, it can have u p to 13 separ ate network connec­tions going simultan eously. Instead of sharing the network bandwid th , as in
connections to a hub, each connection has its own 10 Mbit/s or 100 Mbit/s
bandwidth to use.

Switch Ope ration

Swit c h 208/ 224 Descr ipt io n

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Troubleshooting

This chapter describes how to troubleshoot your Switch 208/224. Note that if
you have a Switch 208/224 Management Module, you can troubleshoot your
switch using software. See the HP AdvanceStack Swi tch 208/224 Ma nage -
ment Module Installation and Reference Guide for more information.

This chapter desc ri b es the fo llowing:

■ solutions to common problems

■ LED error indications

■ diagnostic tests

■ resetting the switch

■ HP Customer Support Services

3

Solutions to Common Problems

Most problems are caused by the follow in g situations:

■ Incorrect switch-to-switch or switch-to-hub connections. If you

have connected your switch to another switch or a hub by using twisted­pair cabl e from an RJ-45 MDI-X connector on your swit ch to the same t ype
of connector on the other switch or hub, you must use a crossover cable.
If you have used a straight-through cable, the connection will not work.
The LED for the port you are using will not come on when you connect
the cable.

Use crossover twisted-pair cable for switch-to-switch or switch-to-hub
connections, and straight-through cable for switch-to-end node connec-

tions. See appendix A, “Cables and Connectors” for pinouts and correct
cable wiring for crossover and straight-through twisted-pair cables.

■ Faulty ca ble or cabl e is loose. Look for loose or obviously faulty

connections. If they appear to be OK, try a different cab le.

■ Non-standard cables. Non-stan da rd and mis wi red cables may cause

numerous network collisions, and can seriously impair network perfor­mance. Use a new correctly-w ired cable or compare your cab le to th e

Troubleshooting

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Troubleshooting

Solutions to Common Problems

cable in appendix A, “Cables and Connectors” for pinouts and correct
cable wiring. A category 5 cable tester is a recommen d ed tool for every
100Base-T network installation.

■ Imprope r Netw or k Topo log i es . It is important to make sure you h ave

a valid network topology. Common topology faults include excessive
cable length and excessive repeater delays between nodes. If you have
network problems after recent changes to the network, change back to
the previous topology. If you no longer experience the problems, the new
topology is probably at fault. Refer to the guide entitled Designing HP
AdvanceStack Workgroup Networ ks for topology configuration guide­lines. This guide is included on the HP AdvanceStack Products CD-ROM
that comes with the HP Switch 208/224 Management Module. The guide
can also be found online at the HP World Wide Web site,
http://www.hp.com/go/network_city.

Troubleshoot ing

In addition, you should make sure that your network topology contains
no data path loops. Between any two end nodes, there should be only one
active cabling path at any time. Data path loops will cause broadcast
storms that will severely impact your network performance. If you wish
to build redundant paths between important nodes in your network to
provide some fault tolerance, you should install a Switch 208/224 Manage­ment Module and enable Spanning Tree Protocol support on the switch.
This ensures that only one of the redundant paths is active at any time,
thus avoiding data path loops.

■ Switch 208/224- S pe cific Connectivi ty S itu ations:

For the Switch 208T and 224T, there are a few specific network connec­tion situations you must avoid:

• Wr ong transceiver t ype -- You have installed an HP 100VG trans­ceiver into t he tr ansceiv er s lot. The slot is spe cifical ly desi gned to be
used with the HP 100Base-T transce ivers. Make sure that you install

only “B” model or later 100Base-T transceivers in this slot, for
example HP J3192B.

• Wrong network speed connected -- You have connected a
10 Mbit/s cable to one o f the 10 0 Mbit /s ports . On the Swi tch 208 /224,
the 100 Mbit/s ports cannot operate at 10 Mbit/s.

• Expansion Module installed -- When you install an optional expan­sion module in the back of the switch, it uses the port 1 circuitry to
communicate to the rest of the network through the switch. In this
case, the port 1 RJ-45 connector (and only that connector) becomes
disabled, as shown by the port 1 disabled LED on the front of the
switch .

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LED Error Indications

LED Error Indications

LED patterns indicating prob lems Diagnost ic Tips

Power Fault RPS Port
OFF * * * Check th e po wer cord a nd p ower sou rc e. I f they ar e OK , the swi tc h

may have to be replaced. Contact your HP-authorized LAN dealer
or HP representat ive for assistanc e.

ON OFF * OFF when

cable fi rst
connected

Link bea t ha s no t be en dete cte d on t he p ort. Chec k th at the cabl i ng
on the indicated port is con nected properly. Faul ty or improperly
wired cables are c om m on; try a different cable.

Troubleshooting

For the 100 Mbit/s ports, verify th at you are usi ng category 5, or
better, UTP or the appropriate fiber -optic cable. Also, the you have
not connected a 10 Mbit/s device to the port.

If you hav e a Management Mo dule in the switch, use HP
AdvanceStack Assistant or the switch console to determine the
state of the port:

- Determine if the port was disabled. Re-enable if desired.

ON Flashi ng * Flashing This coul d only occur w ith the port LED for the 10 0 Mbit/s tran sceiver

port, and only whe n a 100 VG tr ans ceiver modul e has been ins ta lled
in the sl ot. Only 100Base-TX and 100Base-FX transceivers shoul d
be installed in t he transcei ver slot .

ON Flashi ng Flashing * The Redundant Power Supply (RPS) has experienced a fa ult and is

now using its backup power capabilities. See the documentation
provided with the RPS for troubleshooting.

OFF * OFF and

you are
using an
RPS

ON Flashi ng * Variable A fault ha s been detect ed during self test in a switch comp onent that

* The swi tch is not rec eiving powe r from the Redund ant Power Suppl y

(RPS). If you have an RPS con nected, ch eck the status of the RPS
and check th e cable an d power conn ectio ns on both the switch and
the RPS.

controls netwo rk communications through multiple swi tch ports .
Try powe r cyclin g the switch. If the error persists, the switc h m a y
have to be r eplace d. Contact your HP-aut hor ized L AN deal er or HP
repres entative for assistance.

Troubleshoot ing

ON ON for a

pro­longed
period

* This LED is not important for the diagnosis.

The flashing beh avior is a re gular puls e once every 1. 6 seconds, approxima tely.

* Variable, al l

may be ON

A switch hardware failure was detected during self -test. Se lf-test
does not complete so the LEDs will stay on longer tha n 60 seconds.

Power cycle the switch. If this condition persists, the switch may
have to be r eplace d. Contact your HP-aut hor ized L AN deal er or HP
repres entative for assistance.

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Troubleshooting

Diagnostic Tests

Diagnostic Tes ts

When a Management Module is installed, the HP Advanc eStack Assistant an d
switch console soft ware pr ov id e tests, indicators, and an event log th at can
be used to monitor the switch and its network connections. See chapter 7,

“Troubleshooting”, in the HP AdvanceStack Switch 208/224 M anage men t
Module Installation and Reference Guide for more informatio n.

Testing the Switch

If you believe that the switch is not operating correctly, you can reset the
switch to test its circuitr y. To reset a switch, either:

Troubleshoot ing

■ Remove and reinsert the power cord fo r the switch.

■ Press the Reset button on the optional Switch Management Module (if

inst alled).

Testing Twisted-Pair C abling

If you think the cable should work but still isn’t working, it may not be
compatible with the IEEE 802.3 Type 10Base-T or 100Base-T standards. The
twisted-pair cables attached to the Switch 208/224 must be compatible with
these standar ds.To veri fy that your ca ble i s compatible with these sta ndards ,
use a qualified cable test device.

HP also offers a wire testing service. Contact your HP-authorized LAN dealer
or your local HP sales office for more information.

Note Make sure that you are using the correct cabling type for each connection.

The switch UTP ports are all wired as MDI-X. For connecting end nodes and
other MDI-type devices, use “straight-through” cable. For connecting hubs,
other swit ches, and other MDI-X devi ces, use “crossover” cable. See appendix
A, “Cables and Connectors” for the pinouts for these cables.

Also, mak e sur e that you h ave n ot inadver tentl y c onnected a 10 Mbit/ s devic e
to one of the 100 Mbit/s ports, or a 100 Mbit/s device to one of the 10 Mbit/s
ports.

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Testing End-to-End Network Communications

Both the switch and the cabling can be tested by running an end-to-end
communications test -- a test that sends known data from one network device
to another through the switch. For example, if you have two PCs on the

network that have HP LAN adapte rs, yo u can use the “Lin k Test” o ption fr om
the adapter’s tes t p rogram (for example, HPLANSet) to verify th at the entire
communication path between the two PCs is functioning correctly. See your
LAN adapter documentation for more information on running the Link Test.

Note Link Test can be performed from end node to end node through the switch

even if th e switch does not h ave a S witch M anagem ent Module ins tal led. Bu t,
with the module, the switch itself cannot respond to any network connectivity
tests (link test, Ping test, or IPX Ping test).

Troubleshooting

Diagnostic Tests

Testing Swit ch-t o-Device Network Communicatio ns

If you have a Switch Management Module installed in the switch, you can
perform the following communication tests to verify that the network is
operating correctly between the switch and any connected device that can
respond correctly to th e communication test.

■ Link Test -- a physical layer test that sends I EEE 802.2 test packets to any

device identified by its MAC address

■ Ping Test -- a network layer test used on IP networks that sends test

packets to any device id en tified by its IP address

■ IPX Ping Test -- a network layer test used on IPX networks that sends test

packets to any device id en tified by its IPX address

These tests can be performed through the switch console interface from a
terminal connected to the Switch Management Module. See the

HP AdvanceStack Switch 208/224 Management Module Installation and
Reference Gui de for more information.

These tests can also be performed from an SNMP network management
station running a program that can manage the switch, for example, HP
AdvanceStack Ass istant.

Troubleshooting

3-5

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Troubleshooting

HP Customer Support Services

Resetting the Swi tch

You can reset the switch by unplugging and plugging back in the power cord;
each switch does n o t h ave a reset button. By reinserting the po w er cord, the
switch performs th e power-on self-tes t. No configuration is changed.

HP Customer Support Services

If you are still having trouble with your switch, Hewlett-Packard offers support
24 hours a day, seven days a week through the use of automated electronic
services including:

■ the World Wide Web

Troubleshooting

■ HP BBS

■ HP FTP Library Service on the Internet

■ CompuServe

■ HP Network Phone-In Support (NPS)

■ HP FIRST FAX Retrieval Service

See the perforated card at the beginning of this manual for information on
how to use these services to get technical support.

Your HP-authorized network reseller can also provide you with assistance,
both with services that they offer and with services offered by HP.

3-6

YUMABOOK.BK : a_cables.fm5 Page 1 Thursday, February 20, 1997 9:35 AM

Cables and Connec tors

This append ix lists cables that h ave been tested and verified for use w ith the
HP Switch 208/224. It also includes minimum pin-out in fo rmation so, if you
wish to use an unlisted cable, you can verify th at th e cab les 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.

A

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

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

Twisted-Pair Cable/Connector Pin-Outs

The RJ-45 ports (10 Mbit/s and 100 Mbit /s, both fixed and transceiver ) on the
Switch 208/224 are wi red as MDI-X ports. The type of twisted -p air cable you

connect to these ports (either “straight through” or “crossover”) depends on
the type of device at the other end of the cable .

The basic rule is, when connecting same-typ e p orts tog eth er (for example
MDI-X-to-MDI-X), use crossover cable; when connecting opposite-type ports
together (for example MDI-X-to-MDI), use straight-through cable.

These additional rules apply:

■ All twisted-pair wires used must be twisted through the entire length of

the cable. The wiring sequen ce must conform to AT&T 258A (not USOC).
See “Twisted- Pair Cable Pin Assignments” later in this appendi x for a
listing of the signals used on each pin.

Cables and Connectors

■ For connections to the 10 Mbit/s ports, you can use Category 3, 4, or 5

unshielded twisted-pair cable, as supported by the IEEE 802.3 Type
10Base - T st a nd a rd .

■ For connections t o the 100 Mbit/s po rts, use Category 5 only, as supported

by the IEEE 802.3u Type 100Base-TX standard.

A-1

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Cables and Connectors

Twisted-Pair Cabl e/Connect or Pin-Outs

Twisted-Pair Cable for Switch (MDI-X) to
Computer (MDI) Network Connection

To connect PCs or other MDI network devices to these ports, use a “straight­through” cable.

Connector “A” Connector “B”

Straight-through cable

white/orange
orange/white

white/green
green/white

Note Pins 1 and 2 on connector “A” must be wired as a twisted pair to pins 1 and 2

on connector “B”.
Pins 3 and 6 on connector “A” must be wired as a twisted pair to pins 3 and 6
on connector “B”.

Pins 4, 5, 7, a nd 8 are not used in t his appli cation, alth ough th ey may be w ired
in the cable.

.

Cables and Connectors

A-2

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Cables and Connectors

Twisted-Pair Cable/Connector Pin-Outs

Twisted-Pair Cable for Switch (MDI-X) to
Hub or Switch (M DI-X ) N etwork Connection

To connect hubs or switches or other MDI-X network devices to these ports,

use a “crossover” cable.

Connector “A”

Crossover cable

white/orange
orange/whit e

white/green
green/white

Connector “B”

Note Pins 1 and 2 on connector “A” must be wired as a twisted pair to pins 3 and 6

on connector “B”..
Pins 3 and 6 on connector “A” must be wired as a twisted pair to pins 1 and 2
on connector “B”.

Pins 4, 5, 7, a nd 8 are not used in t his appli cation, alth ough th ey may be w ired
in the cable.

.

Cables and Connectors

A-3

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Cables and Connectors

Fiber- Optic Cables

Twisted-Pa ir Cabl e P i n A s s i gnments

Twisted-Pair Straight- Thr ough C able

Switch End (MDI-X) Computer, Transceiver, or

Other MDI Port End

Signal Pins Pins Signal

(receive +)
(receive -)
(transmit +)
(transmit -

1
2
3
6

1
2
3
6

(transmit +)
(transmit -)
(receive +)
(receive -)

Twisted-Pair Cross-Over Cable

Switch End (MDI-X) Hub or Swi tch P ort , or Ot he r

MDI-X Port End

Signal Pins Pins Signal

(receive +)
(receive -)
(transmit +)
(transmit -)

1
2
3
6

6
3
2
1

(transmit -)
(transmit +)
(receive -)
(receive +)

Fiber-Optic Cables

Fiber-optic cables connected to an HP fiber-optic tra nsceiver installe d in the

switch’s transceiver slot must be 1300 nm wavelength, multimode cable
conforming to the ISO/IEC 793-2 type B1, and ITU-T G.652 standards. To
connect to the HP 100Base-FX Fiber -Op tic Transceiver Module, the cables
must have SC-type connecto rs.

Cables and Connectors

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B

Specifications

Physical

Electrical

The HP Switch 208T and 224T automat ically adjust to any voltage between
100-127 and 200-240 volts and either 50 or 60 Hz.)

Width: 44.2 cm (17.4 in)
Depth: 29.8 cm (11.7 in)
Height: 6.6 cm
Weight:

Switch 208T
Switch 224T

4.4 kg (9.71 lb)

4.5 kg (9.95 lb)

Specifications

AC voltage: 100-127 volts 2 00-240 vol ts
Maximum current: 1.4 A 0.8 A
Frequency range: 50/60 Hz 50/60 Hz

Environmental

Operating Non-Operating

Temperature: +0

Relative hu m idity :
(non-condensing)

Maxi m um altitu de : 4.6 km (1 5, 000 ft) 4.6 km (15,000 ft )

°C to +55°C

(32

°F to 131°F)

15% to 95%at 40

-40
(-40

°C (104°F) 15% to 90%

at 65

°C to 70°C

°F to 158°F)

°C (149°F)

B-1

YUMABOOK.BK : b_specs.fm5 Page 2 Thursday, February 20, 1997 9:35 AM

Specifications

Connectors

■ The 10 Mbit/s RJ -45 twisted- pair ports are co mpatible with the IEEE 802.3

Type 10Base-T stan d a rd.

■ The 100 Mbit/s RJ-45 twis ted-pair port is compatible with the IEEE 802. 3u

standard.

Specifications

Electromagnetic

Verifi e d to :

FCC part 15 Class A
CISPR22 / EN55022 Class A
VCCI Class 1

Immunity

EN50082-1

See the Declaration of Confo rmity for additional information at the end of

appendix C, “Safety and Regulatory Statements”.

Safety

Complies with

IEC 950: (1991)+A1,A2/.EN60950 I(1992)+A1,A2
UL1950
CSA 950
NOM-019-SCFI-1994

Acoustic Noise

Geraeuschemiss ion LwA=53 dB am fikti ven Arbeitsplatz nach DIN 45635 T.19

B-2

YUMABOOK.BK : c_safety.fm5 Page 1 Thursday, February 20, 1997 9:35 AM

Safety and Regulatory S tatem ents

This chapter covers the following topics:

■ mounting precautions

■ power precautions

■ safety and regulatory statements

C

■ Declaration of Conformi ty

Mounting Precautions

When you put a switch into a rack, follow these mounting precautions:

■ The rack or cabinet should be adequately secured to prevent it from

becoming uns table and/or fallin g o ver. The fir st sw itch (or single s witch)
should be mounted in a position toward the bottom of the rack for stability
and to make it easier to stack the other switches on top.

■ Before mounting a switch, plan its location and orientation relative to

other devices and equipment. Also consider the cabling that will be
attached to the switch an d the ports that will be used. Verify that the re is
room for the grouped cables to trail out from the side of the switch. Allow
at least 7.6 cm (3 inches) in the front of the switch. In the back of the
switch, allow at least 3.8 cm (1 1/2 inches) of space for t he power cor d .

■ Ensure that the switch does not overload the power circuits, wiring, and

over-current protection. To determine the possibility of overloading the
supply circuit s, add together the amperag e ratings from all your switch es
(and other equipmen t ) installed on the same circu its and compare the
total with the rating limits for the supply circuits.

Safety and Regulatory

Statements

■ Make sure that the power source circuits are properly grounded, then use

the supplied power co rd to connect the switch to the circuit. See the Safety
Statements in this chapter.

■ Do not install the switc h in an envir onment wher e the oper ating ambient

temperature might exceed 55°C (131°F).

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

C-1

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Safety and Regulatory Statements

Power Precautions

Power Precautions

Follow these precautions when unplugging and plugging in power to the
switch as well as adding or removing modules.

Caution Before installing an optional module into the Expansion Slot, Management

Slot, or transceiver slot, unplug the switch. Damage to the switch or module
could occur if you attempt to install the module without unplugging the switch.
If you do not install an optional module, veri f y th at the cover plates are
covering the sl ot. A cover plate is re quired not only for safe o peration, but als o
to ensure proper switch cooling.

Statements

Safety and Regulatory

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

the switch, 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 switch.

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

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

When install ing the swi tch, not e that the AC ou tlet must be ins talled near the
equipment and should be easily accessible.

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Safety an d Regulator y Statement s

Safety Information

Documentat ion referenc e symbol. If the product is marked wit h this

!

WARNING A WARNING in the m anual denot es a hazard t hat can cause injur y

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

symbol, refe r to the p roduct d ocume ntati on to g et m ore inf ormati on
about the product.

or death.

equipment.
Do not proceed beyond a WARNIN G or CAUTION noti ce until you

have understood th e hazardous conditions and have taken appro­priate steps.

Safety Information

Safety and Regulatory

Statements

Grounding

These are saf ety class I products and have protective earthing ter minals. 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 protectio n has been im p aired, 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 part s 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.

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Safety and Regulatory Statements

Infor mations concernant la sécuri té

Informations concernant la sécurité

Symbole de r éfére nce à la docu ment atio n. S i le pr oduit es t mar qué de

!

WARNING Dans la documenta tion, un WARNI N G indique un danger susceptible

CAUTION Un texte de mi se en gar de intit ulé CAUTION i ndique un da nger sus cep-

ce symbol e, r eportez- vous à la documen tation du pr oduit afin d'obt enir
des infor m ations plus détail lées.

d'entraîner des domm ages corporels ou la mo rt.

tible de causer des dommages à l'équipement.
Ne continuez pas au-delà d'une rubrique WARNI N G ou CAUTION

avant d' avo ir bi en compr is l es c ond iti ons présen tan t u n da nge r et pr i s
les mesures appropriées.

Cet appareil est un produit de classe I et possède une borne de mise à la terre.

Statements

Safety and Regulatory

La source d'alimentation principale doit être munie d'une prise de terre de
sécurité in stallée aux bornes du câblage d 'entrée, sur le cordon d'al imentation
ou le cordon de raccordement fourni avec le produit. Lorsque cette protection
semble avoir été endomm agée, débrancher le cord o n 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 desser vie 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 surtensi ons t ra nsito ires 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'utili sateur. Tout dépannag e, r églage, entretien ou r ép aration devra être
confié exclusivement à un personnel qualifié.

Cet appareil ne comporte pas de commutateur principal ; la mise sous tension
est effectuée par branche ment du cord o n d'alimentation.

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Safety an d Regulator y Statement s

Hinweise zur Sicherheit

Hinweise zur Sicherhei t

Symbol für Dokumentationsverwei s. Wenn das Produkt mit diesem

!

WARNING Symbol f ü r Dokumentationsverweis. Wenn das Produkt m it die sem

Symbol mar kiert i st, sch lagen S ie bitt e in de r Produkt dokument ation
nach, um mehr Inform ationen über das Produkt zu erhalten.

Symbol mar kiert i st, sch lagen S ie bitt e in de r Produkt dokument ation
nach, um mehr Inform ationen über das Produkt zu erhalten.

CAUTION Symbol für Dokumentationsverweis. Wenn das Produkt mit diesem

Symbol mar kiert i st, sch lagen S ie bitt e in de r Produkt dokument ation
nach, um mehr Inform ationen über das Produkt zu erhalten.

Fahren Si e nach dem Hinweis WARNING oder CAUTION erst fort,
nachdem Sie den Gefahrenzustan d 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 Stromvertei-

lungssystem beli efert wird, müssen Sie sich v ergewissern, daß d ie 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 Netzwerk es Vorsicht walten lassen.

Safety and Regulatory

Statements

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 eingeschal tet.

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Safety and Regulatory Statements

Considerazioni sulla sicurezza

Considerazioni sulla sicurezza

Simbolo di riferiment o alla docume ntazione . Se il prodott o è contras-

!

WARNING La dicitur a WARNINGd enot a un pe ricol o che può cau sare le si oni o

CAUTION La dicituraCAUTION denota un pericolo che può danneggi are le

segnato da questo s imbolo, far e rifer imento alla documentazi one sul
prodotto per ul terior i informazioni su di esso.

morte.

attrezzature.
Non procedere oltre un avviso di WARNI N G o di CAUTIONprima di

aver compr eso le con dizi oni di ri schio e a ver pr ovveduto al le misur e
del caso.

Questo prodotto è omologato nella classe di sicurezza I ed ha un terminale

Statements

Safety and Regulatory

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
danneggiame nt o della protezione, di sinserite il cavo d'alimentazione fin o a
quando il collegaento 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 fr a lo ro;

■ i cavi LAN possono occas ionalmente andare soggetti a per icolose tensioni

transitorie (ad esempio, provocate da lampi o disturbi nella griglia
d'alimenta zion e d ella 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.

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Safety an d Regulator y Statement s

Consideraciones sobre seguridad

Consideraciones sobre seguridad

!

WARNING Una WARNING en la documentación señala un riesgo que podría

CAUTION Una CAUTION en la documentación señala un riesg o que podría

Este aparato se enmarca dentro de la clase I de segurida d y se encuentr a
protegido por una borna de puesta a tierra. Es preciso que exista una puesta

a tierra continua desde la to ma de alimentaci ón eléctr ica hast a las bornas de
los cables de entr ada del aparato , el ca ble de al imentació n o el ju ego de cable
de alimentación suministrado. Si existe la probabilidad de que la protección
a tierra haya s ufrido desperfectos, desen chufar el cable de alimentaci ón hasta
haberse subsanado el problema.

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

■ Si la LAN abarca un área cuyo suministro eléctrico provi ene de más de

una red de distribución de electricidad, cerciorarse de que las puestas a
tierra estén conectadas entre sí de modo seguro.

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.

resultar en lesiones o la muerte.

resultar en averías al equipo.
No prose guir después de un sí mbolo de WARNING o CAUTI ON hasta

no haber entendido las condi ciones peligrosas y h aber tomado las
medidas apropiadas.

Safety and Regulatory

Statements

■ Es posible que los cables de la LAN se vean sometido s de vez en cuando

a voltajes momentán eos que entrañ en pelig ro (rayo s o alteraci ones en la
red de energía eléc trica). 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.

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Safety and Regulatory Statements

Safety Information (Japanese)

Safety Information (Japanese)

Statements

Safety and Regulatory

C-8

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Safety an d Regulator y Statement s

Regulat ory State m ents

Regulatory Statements

FCC Class A Statement (for U.S.A. Only):

This equipment has been tested and found to comply with the limits for a Class
A digital device, pursuant to Part 15 of the FCC Rules. Thes e limits are
designed to provide r easonable protection again st harmful interferenc e when
the equipment is oper ated in a commercial environment. This equipment
generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordan ce wi th the ins t ruction manual, may cause harmful
interference to radio communications. Operation of this equip ment in a
residenti al area m ay cause h armful inte rference i n which c ase the user will be
required to correct the interference at his own expense.

Safety and Regulatory

Statements

VCCI Class 1 (For Japan Only) when using unshielded cables

European Comm unity

This equipment complies with ISO/IEC Guide 22 and EN55022 Class A with
unshielded cables and EN55022 Note

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.

Canada

This product complies with Class A Canadian EMC requirements.

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Safety and Regulatory Statements

Declaration of Conformity

Declaration of Conformity

The following Declaration of Confor mity for the HP AdvanceStack Switch
208T and 224T complies with I SO/IEC Guide 22 an d EN 45014. The d eclaration
identifies the product, the manufacturer’s name and address, and the appli­cable specifications that are recogn ized in the European community.

Statements

Safety and Regulatory

C-10

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Index

Numerics

10 Mb it/s por t s

location on sw itch … 2-2
100 LED… 2-3
100Base-FX transceiver port

cables used with … 1-3
100Base-T ports

LEDs for … 2-3

location on sw itch … 2-2
100Base-T transceivers… 1-5
100Base-TX ports

cables used with … 1-3
10Base-T ports

LEDs for … 2-4

location on sw itch … 2-2

A

A or B port LED … 2-3
address learning… 2-6
address table

automa tic address learning… 2-6

filter in g ou t traffic … 2-6

flooding traffic … 2-6

forwarding traffic … 2-6

moves and ch anges … 2-6

operation … 2-6

B

back of swit ch

description … 2-5

expansion slot… 2-5

power connector … 2-5
backbone switch

topology with … 1-17
bandwidth, how sw itch enhances… 2-7

C

cabinet

mounting the switch in … 1-8
cable management … 1-18

cables

category 3, 4, 5… A-1
connecting cables to sw itch ports… 1-13
crossover cable pinout… A-4
fiber-optic… A-4
infrastructure requirements… 1-3
managing … 2-5
straight-through cable pinout… A-4
twisted-pair connector pin-outs … A-1

crossover cable

pin-out … A-4

D

description

back of switches … 2-5
front of switches … 2-2
switch… 2-1

desk top swi t c h

sample topol ogy… 1-16

diagnosti c tests… 3-4

end-to-end connectivity… 3-5
testing the switch only … 3-4
testing twisted-pair cabling … 3-4

Index

E

expansion modules

effect on switch port 1… 1-5, 3-2
installation… 1-5

Expansion Slot

allowed modules… 2-5
LEDs for … 2-3

F

Fault LED … 1-7, 2-3, 3-3
Fdx LED … 2-3
features

Switch 208/224 … 2-1

Switch Mana gement Module… 2-4
fiber-optic cables… A-4
filtering out traffic… 2-6

Index – 1

YUMABOOK.BK : YUMABOOK.IX Page 2 Thursday, February 20, 1997 9:35 AM

Index

flashing LED

error indications … 3-3
flooding traffic … 2-6
forwarding traffic … 2-6
front of switch

description … 2-2

H

horizontal surface

mounting switch on … 1-11
HP Redundant Power Supply (RPS)

connecti ng to switch… 1-12

connector… 2-5

LED … 2-3

precautions when using… 1-12

I

included parts… 1-2
installing

optional modules … 1-4

Switch 208/224 … 1-1

transceivers … 1-5
IPX ping test … 3-5

L

LEDs

10 Mb it/s por t s … 2-4

100 … 2-3

100 Mbit/s ports… 2-3

A or B… 2-3

descrip tions of … 2-3

error indications … 3-3

Expansion Slot… 2-3

Fault… 2-3

Fdx … 2-3

port 1 disabled … 1-5, 2-3, 3-2

Power … 2-3

RPS … 2-3
link test … 3-5

M

Management Modu le, Switch

diagnostics with… 3-4
features… 2-4
installing … 1-4

Management Slot

about … 2-4
MDI-X to MDI network cable … A-2
MDI-X to MDI-X network cable… A-3
mounting precautions… C-1
mounting the switch

in a rack … 1-8

on a horizonta l surface… 1-11

on a wall … 1-11
moves and changes

effect on address table… 2-6

N

network ports

connecting to… 1-13

LEDs for … 2-3

types of … 2-2

P

ping test… 3-5
port 1 disabl ed LED… 1-5, 2-3, 3-2
ports

connecting to… 1-13

LEDs for … 2-3

types of … 2-2
power

connecting switch to… 1-12

precautio ns… C-2

using RPS … 1-12
power connector … 2-5
Power LED … 1-7, 2-3, 3-3
precautions

mounting … C-1

power … C-2

2 – Index

YUMABOOK.BK : YUMABOOK.IX Page 3 Thursday, February 20, 1997 9:35 AM

R

rack

mounting the switch in … 1-8
precautions when using … C-1

resetting the switch … 3-6

trouble shooting procedure … 3-4

RPS (Redundant Power Supply)

connecti ng to switch… 1-12
LED … 2-3

S

safety information… C-1
segment sw itch

sample topology … 1-15
slow flas h rate definit ion… 2-4
specifications… B-1
straight-through cable

pin-out… A-4
switch

description … 2-1

featur es… 2-1

featur es added with Switch Ma nagement

Module… 2-4
mounting in a rack or cabinet… 1-8
mounting on horizontal su rface … 1-11
mounting on wal l… 1-11
operation … 2-6
specifications… B-1

Switch Management Module

diagnost ics with… 3-4
featur es… 2-4
installing… 1-4

switch oper ation

description … 2-6
verifying after in s ta l l a ti o n … 1-6

transceivers

installation… 1-5
supported ty pes… 1-5
when wrong type is used … 3-2

troublesh ooting … 3-1

common network pr oblems … 3-1
diagnosti c tests… 3-4
effects of improper topology … 3-2
effects of non-standard cables … 3-1
switch-specific connectivity situations… 3-2
testing the switch… 3-4
testing the twist ed-pair cab les… 3-4

twisted-pair cable

crossover cable pin-out… A-4
pin-outs … A-1, A-4
straight-through cable pin-out … A-4
switch-to-computer connect ion … A-2
switch-t o-switch or hub connection… A-3
testing… 3-4

twisted-pai r port LEDs

10 Mbit/s … 2-4
100 Mb it /s … 2-3

W

wall

mounting switch on… 1-11

Index

T

testin g

end-to-end communications … 3-5
switch-to-device communications … 3-5
twisted-pair cabling… 3-4

topologies

effect s of improper topology… 3-2
samples of … 1-15

Index – 3

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YUMABOOK.BK : yumabkcv.fm5 Page 2 Thursday, February 20, 1997 9:35 AM

Technical informatio n in this
document is subject to change
without notice.

© Copyright 1997
Hewlett-Packard Company
Printed in U.S .A. 3/97

Manual Part Number
5966-5225

*5966-5225*