HP ProCurve 2124 User manual

hp procurve
switch 2124
installation guide
www.hp.com/go/hpprocurve

HP Procurve
Switch 2124
Installation Guide

Hewlett-Packard Company
8000 Foothills Boulevard, m/s 5552
Roseville, California 95747-5552
http://www.hp.com/go/hpprocurve
© Copyright 2001 Hewlett-Packard Company
All Rights Reserved.
This document contains information which is protected by
copyright. Reproduction, adaptation, or translation without
prior permission is prohibited, except as allowed under the
copyright laws.
Publication Number
J4868-90001
June 2001
Applicable Products
HP Procurve Switch 2124 (HP J4868A)
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 Customer Support/Warranty booklet included with
the product.
A copy of the specific warranty terms applicable to your
Hewlett-Packard products and replacement parts can be
obtained from your HP Sales and Service Office or
authorized dealer.
Safety
Before installing and operating this product, please read the
“Installation Precautions” in chapter 2, “Installing the Switch
2124”, and the safety statements in appendix C, “Safety and
EMC Regulatory Statements”.

iii
Contents
1 Introducing the HP Procurve Switch 2124
Front of the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Network Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Reset Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
LED Mode Select Button and Indicator LEDs . . . . . . . . . . . . . . . . . . . . 1-4
Back of the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Power Connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Switch Operation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Address Table Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
2 Installing the Switch 2124
Included Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Installation Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Installation Precautions: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
1. Prepare the Installation Site . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
2. Install An Optional Transceiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
3. Verify the Switch Operates Correctly . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
4. Mount the Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
5. Connect the Switch to a Power Source . . . . . . . . . . . . . . . . . . . . . . 2-12
6. Connect the Network Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Example Network Topologies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
As a Desktop Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
As a Segment Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Connecting to a Backbone Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16

iv
3 Troubleshooting
Basic Troubleshooting Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Diagnosing with the LEDs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Hardware Diagnostic Tests . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Testing the Switch by Resetting It . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Testing Twisted-Pair Cabling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Testing End-to-End Network Communications . . . . . . . . . . . . . . . . . . 3-6
HP Customer Support Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
A Specifications
Physical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Environmental . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Acoustic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
B Switch Ports and Network Cables
Switch Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Cables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Twisted-Pair Cable/Connector Pin-Outs . . . . . . . . . . . . . . . . . . . . . . . B-2
Straight-Through Twisted-Pair Cable for
10 Mbps or 100 Mbps Network Connections . . . . . . . . . . . . . . . . . . . . B-4
Crossover Twisted-Pair Cable for
10 Mbps or 100 Mbps Network Connection . . . . . . . . . . . . . . . . . . . . . B-5
C Safety and EMC Regulatory Statements
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
EMC Regulatory Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-8
Index

1-1
Introducing the HP Procurve
Switch 2124
1
Introducing the HP Procurve Switch 2124
The HP Procurve Switch 2124 is a multiport switch that can be used to build
high-performance switched workgroup networks. This switch is a store-and-
forward device that offers low latency for high-speed networking.
Throughout this manual, this switch will be abbreviated as the Switch 2124.
The Switch 2124 has 24 auto-sensing 10/100Base-TX RJ-45 ports, and a slot for
installing an HP 100-FX SC Transceiver (HP J4853A).
You can directly connect end node devices such as computers, printers, and
servers to this switch, providing dedicated bandwidth to those devices. You
can also connect this switch to hubs, other switches, or routers as part of your
network infrastructure.
This chapter describes your HP Switch 2124 including:
■Front and back of the switch
■Features
■Switch operation overview
HP Procurve Switch 2124 (HP J4868A)

1-2
Introducing the HP Procurve Switch 2124
Front of the Switch
Introducing the HP Procurve
Switch 2124
Front of the Switch
Network Ports
■24 auto-sensing 10/100Base-TX RJ-45 ports
All these ports have the “HP Auto-MDIX” feature, which means that you
can use either straight-through or crossover twisted-pair cables to
connect any network devices to the switch.
■One transceiver slot for installing the HP 100-FX SC Transceiver
(HP J4853A)
Reset Button
This button is used to reset the switch while it is powered on. This action
executes the switch self test, and may clear certain error conditions that have
occurred.
Power
LED
Fault
LED
10/100Base-TX RJ-45 ports
LED Mode Select button
and indicator LEDs
Reset button
Slot for
HP 100-FX SC Transceiver
Link and
Mode LEDs
for each
port
All 10/100Base-TX RJ-45 ports have the “HP Auto-MDIX” feature

1-3
Introducing the HP Procurve Switch 2124
Front of the Switch
Introducing the HP Procurve
Switch 2124
LEDs
Table 1-1. Switch LEDs
Switch LEDs State Meaning
Power
(green)
On The switch is receiving power.
Off The switch is NOT receiving power.
Fault
(orange)
Off The normal state; indicates that there are no fault conditions on the switch.
Blinking* An unsupported transceiver has been installed in the transceiver slot. Under this
condition, the Port 25 Link LED will also blink simultaneously.
On On briefly after the switch is powered on or reset, at the beginning of switch self test.
If on for a prolonged time, the switch has a hardware failure, or has failed its self test.
See chapter 3, “Troubleshooting” for more information.
Link
(green –
overlaid with
the port
number)
On Indicates the port is enabled and receiving a link indication from the connected
device.
Off One of these conditions exists:
• no active network cable is connected to the port
• the port is not receiving link beat (RJ-45 ports), or sufficient light (transceiver port)
• for Port 25 (transceiver port), the transceiver has failed
Blinking*
(Port 25 only)
If the Port 25 Link LED is blinking simultaneously with the Fault LED, it indicates that
an unsupported transceiver has been installed in the transceiver slot.
Mode
(green)
Displays network activity information, or whether the port is configured for full-duplex operation, or
100 Mbps operation depending on the mode selected. See “LED Mode Select Button and Indicator
LEDs” on the next page for more information.
LED Mode
Select
indicators
(3 green LEDs)
Act Indicates that the port Mode LEDs are displaying network activity information.
FDx Indicates that the port Mode LEDs are lit for ports that are in Full Duplex Mode.
100 Indicates that the port Mode LEDs are lit for ports that are operating at 100 Mbps.
* The blinking behavior is an on/off cycle once every 1.6 seconds, approximately.

1-4
Introducing the HP Procurve Switch 2124
Front of the Switch
Introducing the HP Procurve
Switch 2124
LED Mode Select Button and Indicator LEDs
To optimize the amount of information that can be displayed for each of the
switch ports without overwhelming you with LEDs, the Switch 2124 uses a
Mode LED for each port. The operation of this LED is controlled by the LED
Mode Select button, and the current setting is indicated by the Mode indicator
LEDs near the button. Press the button to change from one mode to the next.
■If the Activity (Act) indicator LED is lit, the Mode LED for each port
displays activity information for the port — it flickers as network traffic
is received and transmitted through the port.
■If the Full Duplex (FDx) indicator LED is lit, the Mode LEDs light for those
ports that are operating in full duplex.
■If the 100 Mbps (100) indicator LED is lit, the Mode LEDs light for those
ports that are operating at 100 Mbps.
Mode LEDs
(one per port)
LED Mode Select button
and indicator LEDs