3COM 2900 User Manual
3Com Baseline Switch 2900 Family
Getting Started Guide
Manual Version: 5W100
www.3com.com
3Com Corporation
350 Campus Drive, Marlborough,
MA, USA 01752 3064
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UNITED STATES GOVERNMENT LEGEND
If you are a United States government agency, then this documentation and the software described herei n are
provided to you subject to the following:
All technical data and computer software are commercial in nature and developed solely at private expense.
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are committed to:
Establishing environmental performance standards that comply with national legislation and regulations.
Conserving energy, materials and natural resources in all operations.
Reducing the waste generated by all operations. Ensuring that all waste conforms to recognized environmental
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About This Manual
Organization
3Com Baseline Switch 2900 Family Getting Started Guide is organized as follows:
Chapter Contents
1 Product Overview
2 Installation Preparations
3 Installing a Switch
4 Initial Power-On
Briefly introduces the appearance, system description, as
well as the features and applications of the 3Com Baseline
Switch 2900 Family.
Describes the requirements on installation site, the safety
recommendations before and during installation, and the
required tools.
Covers the procedures for installing the 3Com Baseline
Switch 2900 Family, ground wire connection, power
module installation, interface module installation, and so
on.
Helps you get familiar with the basic knowledge of how to
boot and configure the 3Com Baseline Switch 2900 Family,
including device startup, power-on, and initialization of
system files, and so on.
5 Loading Software
6 Maintenance and Troubleshooting
Conventions
The manual uses the following conventions:
GUI conventions
Convention Description
Boldface
>
Introduces how to load Boot ROM and host software for the
3Com Baseline Switch 2900 Family
Introduces the problems that might occur during the
installation and the booting of the 3Com Baseline Switch
2900 Family and the related solution.
Window names, button names, field names, and menu items are in
Boldface. For example, the New User window appears; click OK.
Multi-level menus are separated by angle brackets. For example, File >
Create > Folder.
Symbols
Convention Description
Means reader be extremely careful. Improper operation may cause
bodily injury.
Means reader be careful. Improper operation may cause data loss or
damage to equipment.
Means an action or information that needs special attention to ensure
successful configuration or good performance.
Convention Description
Related Documentation
In addition to this manual, each 3Com Baseline Switch 2900 documentation set includes the following:
Manual Description
3Com Baseline Switch 2900 Family User Guide
Obtaining Documentation
You can access the most up-to-date 3Com product documentation on the World Wide Web at this URL:
http://www.3com.com.
Means a complementary description.
Means techniques helpful for you to make configuration with ease.
Describe how to configure your 3Com Baseline
Switch 2900 Family using the supported
protocols
Table of Contents
1 Product Overview······································································································································1-1
Introduction ·············································································································································1-1
3Com Baseline Switch 2920-SFP Plus···································································································1-3
Front Panel ······································································································································1-3
Rear Panel·······································································································································1-3
Power Supply System ·····················································································································1-3
Cooling System ·······························································································································1-3
3Com Baseline Switch 2928-SFP Plus···································································································1-4
Front Panel ······································································································································1-4
Rear Panel·······································································································································1-4
Power Supply System ·····················································································································1-4
Cooling System ·······························································································································1-4
3Com Baseline Switch 2952-SFP Plus···································································································1-5
Front Panel ······································································································································1-5
Rear Panel·······································································································································1-5
Power Supply System ·····················································································································1-5
Cooling System ·······························································································································1-5
3Com Baseline Switch 2928-PWR Plus ·································································································1-6
Front Panel ······································································································································1-6
Rear Panel·······································································································································1-6
Power Supply System ·····················································································································1-6
Cooling System ·······························································································································1-6
3Com Baseline Switch 2928-HPWR Plus·······························································································1-7
Front Panel ······································································································································1-7
Rear Panel·······································································································································1-7
Power Supply System ·····················································································································1-7
Cooling System ·······························································································································1-8
Ports························································································································································1-8
Console Port····································································································································1-8
10/100/1000Base-T Ethernet Port···································································································1-8
1000Base-X SFP Interface··············································································································1-9
LEDs······················································································································································1-10
Power LED ····································································································································1-10
RPS Status LED ····························································································································1-10
Port Mode LED ······························································································································1-11
10/100/1000Base-T Auto-Sensing Ethernet Port Status LED·······················································1-11
1000Base-X SFP Interface Status LED ························································································1-13
2 Installation Preparations···························································································································2-1
Safety Precautions ··································································································································2-1
Installation Site········································································································································2-1
Temperature/Humidity·····················································································································2-1
Cleanness········································································································································2-1
Electromagnetic Susceptibility·········································································································2-2
i
Laser Safety ····································································································································2-2
Installation Tools ·····································································································································2-3
3 Installing a Switch ·····································································································································3-1
Installing the Switch into a 19-Inch Rack Using Mounting Brackets·······················································3-1
Introduction to Mounting Brackets···································································································3-1
Attaching the Mounting Brackets to a Switch··················································································3-2
Mounting the Switch to a Rack········································································································3-4
Mounting the Switch on a Workbench ····································································································3-6
Connecting the PGND Cable ··················································································································3-6
When a Grounding Strip is Available·······························································································3-6
Where a Grounding Conductor Can be Buried ···············································································3-8
In Other Installation Sites ················································································································3-8
Connecting the Power Cord····················································································································3-9
Connecting an AC Power Cord ·······································································································3-9
Connecting an RPS DC Power Cord·····························································································3-10
Verifying the Installation························································································································3-10
4 Initial Power-On ·········································································································································4-1
Setting Up the Configuration Environment······························································································4-1
Connecting the Console Cable ···············································································································4-1
Console Cable ·································································································································4-1
Connection Procedure·····················································································································4-2
Setting Terminal Parameters ··················································································································4-2
Booting the Switch ··································································································································4-5
Checking Before Power-On·············································································································4-5
Powering On the Switch ··················································································································4-5
Changing the Boot Mode·················································································································4-7
5 Loading Software·······································································································································5-1
Introduction ·············································································································································5-1
Approaches for Loading Application and Configuration Files·································································5-1
Loading Files Through the Boot ROM Menu ··························································································5-1
Introduction to the Boot ROM Menu································································································5-2
Loading Files Using XMODEM Through Console Port ···································································5-3
Loading Files Using TFTP Through Ethernet Port ········································································5-11
Loading Files Using FTP Through Ethernet Port ··········································································5-14
6 Maintenance and Troubleshooting··········································································································6-1
File Loading Failure·································································································································6-1
Password Loss········································································································································6-1
User Password Loss························································································································6-1
Boot ROM Password Loss ··············································································································6-1
Power Supply Failure······························································································································6-2
Configuration Terminal Failure················································································································6-3
ii
1 Product Overview
Introduction
The 3Com Baseline Switch 2900 Family are Layer 2 Gigabit Ethernet switches developed by 3Com.
They are intelligent manageable switches designed for network environments where high performance,
high-density port distribution, and easy installation are required.
With 10/100/1000 Mbps Ethernet interfaces, the 3Com Baseline Switch 2900 Family are mainly
deployed at the access layer in enterprise networks requiring Gigabit to the Desktop (GTTD) application
and at the distribution layer in metropolitan-area networks (MANs). In the latter deployment, the 3Com
Baseline Switch 2900 Family provide GE electrical interfaces for user access or low-end switch
convergence in the downlink direction. Whereas, in the uplink direction, they are aggregated to
large-capacity Layer 3 switches or switches at the exchange office through their GE interfaces.
Table 1-1 shows the models and system specifications of the 3Com Baseline Switch 2900 Family.
Table 1-1 The 3Com Baseline Switch 2900 Family system specifications
Description
Item
Physical
dimension
s (H × W ×
D)
Weight
Console
port
Service
ports
3Com
Baseline
Switch
2920-SFP
Plus
43.6 × 440 ×
160 mm (1.72
× 17.32 × 6.30
in.)
3 kg (6.61 lb) ñ 3 kg (6.61 lb)
ñ
1 1 1 1 1
16 ×
10/100/1000B
ase-T
autosensing
Ethernet ports
+ 4 GE SFP
interfaces
3Com
Baseline
Switch
2928-SFP
Plus
43.6 × 440 ×
160 mm (1.72
× 17.32 × 6.30
in.)
24 ×
10/100/1000B
ase-T
autosensing
Ethernet ports
+ 4 GE SFP
interfaces
3Com
Baseline
Switch
2952-SFP
Plus
43.6 × 440 ×
260 mm (1.72
× 17.32 ×
10.24 in.)
5 kg (11.02
ñ
lb)
48 ×
10/100/1000B
ase-T
autosensing
Ethernet ports
+ 4 GE SFP
interfaces
3Com
Baseline
Switch
2928-PWR
Plus
43.6 × 440 ×
420 mm (1.72
× 17.32 ×
16.54 in.)
7 kg (15.43
ñ
lb)
24 ×
10/100/1000Ba
se-T
autosensing
Ethernet ports
+ 4 GE SFP
interfaces
3Com
Baseline
Switch
2928-HPWR
Plus
43.6 × 440 ×
420 mm (1.72
× 17.32 ×
16.54 in.)
7 kg (15.43
ñ
lb)
24 ×
10/100/1000B
ase-T
autosensing
Ethernet ports
+ 4 GE SFP
interfaces
1-1
Description
Item
AC
Inp
ut
volt
RP
ag
S
e
DC
Supported
RPS unit
Power
consumpti
on
Power
consumpti
on (full
configurati
on)
3Com
Baseline
Switch
2920-SFP
Plus
3Com
Baseline
Switch
2928-SFP
Plus
3Com
Baseline
Switch
2952-SFP
Plus
3Com
Baseline
Switch
2928-PWR
Plus
3Com
Baseline
Switch
2928-HPWR
Plus
Rated voltage range: 100 VAC to 240 VAC, 50 Hz or 60 Hz
Maximum voltage range: 90 VAC to 264 VAC, 47 Hz or 63 Hz
Use the
external RPS
unit provided
by 3Com only,
—
with the rated
voltage
ranging from
–52 VDC to
–55 VDC
— RPS1000-A3
11.9W 13.4W 25.7W 25.0W
AC: 45.6W
DC: 27.5W
AC power
input: 523 W
(158 W for
system power
consumption
and 365 W for
PoE power
consumption)
DC power
input: 832 W
(92 W for
system power
22.4 W 31.5 W 55.4 W
255 W (85 W
for system
power
consumption
and 170 W for
PoE power
consumption)
consumption
and 740 W for
PoE power
consumption)
Operating
temperatu
re
Operating
humidity
(nonconde
nsing)
0°C to 45°C (32°F to 113°F)
10% to 90%
1-2
3Com Baseline Switch 2920-SFP Plus
Front Panel
Figure 1-1 3Com Baseline Switch 2920-SFP Plus front panel
(1) 10/100/1000Base-T auto-sensing Ethernet port (2) Port status LED
(3) Power LED (Power) (4) Console port
(5) 1000Base-X SFP interface
10/100/1000Base-T autosensing Ethernet ports on the 3Com Baseline Switch 2900 Family are
numbered in up-down and left-right order, with the first upper left one being Port 1, the first lower left one
being Port 2, the second upper left one being Port 3, and so on.
Rear Panel
Figure 1-2 3Com Baseline Switch 2920-SFP Plus rear panel
(1) AC receptacle (2) Grounding screw
Power Supply System
AC power input:
Rated voltage range: 100 VAC to 240 VAC, 50 Hz or 60 Hz
Input voltage range: 90 VAC to 264 VAC, 47 Hz or 63 Hz
Cooling System
The 3Com Baseline Switch 2920-SFP Plus is equipped with one fan for heat dissipation
1-3
3Com Baseline Switch 2928-SFP Plus
Front Panel
Figure 1-3 3Com Baseline Switch 2928-SFP Plus front panel
(1) 10/100/1000Base-T auto-sensing Ethernet port (2) Port status LED
(3) Power LED (Power) (4) Console port
(5) 1000Base-X SFP interface
Rear Panel
Figure 1-4 3Com Baseline Switch 2928-SFP Plus rear panel
(1) AC receptacle (2) Grounding screw
Power Supply System
AC power input:
Rated voltage range: 100 VAC to 240 VAC, 50 Hz or 60 Hz
Input voltage range: 90 VAC to 264 VAC, 47 Hz or 63 Hz
Cooling System
The 3Com Baseline Switch 2928-SFP Plus is equipped with one fan for heat dissipation.
1-4
3Com Baseline Switch 2952-SFP Plus
Front Panel
Figure 1-5 3Com Baseline Switch 2952-SFP Plus front panel
(1) 10/100/1000Base-T auto-sensing Ethernet
port
(3) Console port (4) Power LED (Power)
(5) 1000Base-X SFP interface (6) 1000Base-X SFP interface status LED
Rear Panel
(2) 10/100/1000Base-T auto-sensing Ethernet
port status LED
Figure 1-6 3Com Baseline Switch 2952-SFP Plus rear panel
(1) AC receptacle (2) Grounding screw
Power Supply System
AC power input:
Rated voltage range: 100 VAC to 240 VAC, 50 Hz or 60 Hz
Input voltage range: 90 VAC to 264 VAC, 47 Hz or 63 Hz
Cooling System
The 3Com Baseline Switch 2952-SFP Plus is equipped with one fan for heat dissipation.
1-5
3Com Baseline Switch 2928-PWR Plus
Front Panel
Figure 1-7 3Com Baseline Switch 2928-PWR Plus front panel
(1) 10/100/1000Base-T auto-sensing Ethernet port (2) Port status LED mode switching button
(3) Port status LED (4) Power LED (Power)
(5) Port mode LED (6) Console port Port
(7) 1000Base-X SFP interface
Rear Panel
Figure 1-8 3Com Baseline Switch 2928-PWR Plus rear panel
(1) AC receptacle (2) Grounding screw
Power Supply System
AC power input:
Rated voltage range: 100 VAC to 240 VAC, 50 Hz or 60 Hz
Input voltage range: 90 VAC to 264 VAC, 47 Hz or 63 Hz
Cooling System
The 3Com Baseline Switch 2928-PWR Plus is equipped with three fans for heat dissipation.
1-6
3Com Baseline Switch 2928-HPWR Plus
Front Panel
Figure 1-9 3Com Baseline Switch 2928-HPWR Plus front panel
(1) 10/100/1000Base-T auto-sensing Ethernet port (2) Port status LED mode switching button
(3) RPS status LED (RPS) (4) Port status LED
(5) Power LED (Power) (6) Port mode LED
(7) Console port (8) Port 1000Base-X SFP interface
Rear Panel
Figure 1-10 3Com Baseline Switch 2928-HPWR Plus rear panel
(1) Screw hole of the plug (2) AC receptacle
(3) Grounding screw (4) DC power receptacle
Power Supply System
The 3Com Baseline Switch 2928-HPWR Plus can adopt AC power input, or DC power input, or both to
provide backup
z AC power input:
Rated voltage range: 100 VAC to 240 VAC, 50 Hz or 60 Hz
Input voltage range: 90 VAC to 264 VAC, 47 Hz or 63 Hz
z DC power input
Rated voltage range: –52 VDC to –55 VDC
1-7
Only the RPS recommended by 3Com can be used for the 3Com Baseline Switch 2928-HPWR Plus.
The –48 VDC power supply in the equipment room cannot be used directly. Otherwise, the device may
be damaged.
Cooling System
The 3Com Baseline Switch 2928-HPWR Plus is equipped with six fans for heat dissipation.
Ports
Console Port
Each 3Com Baseline Switch 2900 Family provides one console port on the front panel. Table 1-2
describes the console port specifications.
Table 1-2 Console port specifications
Item Specification
Connector type
Compliant standard
Transmission baud
rate
Service
RJ-45
EIA/TIA-232
9600 bps to 115200 bps (defaulting to 38400 bps)
z It can be connected to an ASCII terminal.
z It can be connected to a serial port of a local or remote (through a pair of
modems) PC running terminal emulation program.
10/100/1000Base-T Ethernet Port
Each 3Com Baseline Switch 2900 Family provides 10/100/1000Base-T Ethernet ports on its front panel.
Quantity of Ethernet ports varies with the device model, see
Table 1-3 describes the specifications of the 10/100/1000Base-T Ethernet ports.
Table 1-3 3Com Baseline Switch 2900 Family 10/100/1000Base-T Ethernet port specifications
Table 1-1 for details.
Item Specification
Connector type
Interface speed and operating mode
Max transmission distance
Transmission medium
Standard
RJ-45
z 10 Mbps, full duplex
z 100 Mbps, full duplex
z 1000 Mbps, full duplex
z MDI/MDI-X, auto-sensing
100 m (328.1 ft.)
Category-5 unshielded twisted pair cable
IEEE 802.3i, IEEE 802.3u, IEEE 802.3ab
1-8
1000Base-X SFP Interface
Each 3Com Baseline Switch 2900 Family provides four 1000Base-X SFP interfaces on its front panel.
You can select the GE SFP transceivers described in
Table 1-4 Transceivers supported by the 3Com Baseline Switch 2900 Family 1000Base-X SFP
interfaces
Transceiver
type
Transceiver
Table 1-4.
Central
wavelength
Connector Fiber
Max
transmis
sion
distance
GE SFP
transceiver
SFP-GE-SX-MM850-A 850 nm
SFP-GE-LX-SM1310-A
1310 nm
SFP-GE-LH40-SM1310
SFP-GE-LH40-SM1550
1550 nm
SFP-GE-LH70-SM1550
SFP-GE-LX-SM1310-B
IDI*
SFP-GE-LX-SM1490-B
IDI*
TX: 1310 nm
RX: 1490
nm
TX: 1490 nm
RX: 1310
nm
LC
LC
50/125 µm
multimode
optical fiber
62.5/125 µm
multimode
optical fiber
9/125 µm
single mode
optical fiber
9/125 µm
single mode
optical fiber
550 m
(0.34
miles)
275 m
(0.17
miles)
10 km
(6.21
miles)
40 km
(24.86
miles)
40 km
(24.86
miles)
70 km
(43.50
miles)
10 km
(6.21
miles)
SFP-GE-T — RJ-45
Twisted pair
cable
100 m
(328.08
ft)
Note* that SFP-GE-LX-SM1310-BIDI and SFP-GE-LX-SM1490-BIDI must be used pairwise.
The types of SFP transceivers may update with time. For information about transceivers, contact 3Com
technical support or marketing staff.
1-9
LEDs
Table 1-5 LEDs
LED Device support Description
Power LED All series See “Power LED” on page 1-10.
RPS status LED
Port mode LED
10/100/1000Base-T
auto-sensing Ethernet
port status LED
1000Base-X SFP
interface status LED
Power LED
The power LED indicates the operation status of the switch.
Table 1-6 Description of the power LED
LED Status Description
3Com Baseline Switch
2928-HPWR Plus
3Com Baseline Switch
2928-PWR Plus and 3Com
Baseline Switch 2928-HPWR
Plus
All series
All series
See “
RPS Status LED” on page
1-10.
See “Port Mode LED” on page 1-11.
See “10/100/1000Base-T
Auto-Sensing Ethernet Port Status
” on page 1-11
LED
See “1000Base-X SFP Interface
Status LED
” on page1-13.
Power
RPS Status LED
The 3Com Baseline Switch 2928-HPWR Plus provides an RPS status LED on its front panel, indicating
the working status of the RPS of the switch.
Table 1-7 Description of the RPS status LED
LED Status Description
RPS
Solid green The switch functions normally.
Blinking green (1 Hz)
Blinking green (3 Hz)
Off The switch has been powered off.
Solid green The RPS DC input is normal.
Off
The system is performing power-on self test (POST) or
downloading software.
The POST has failed or another fatal error has been
detected.
The RPS unit is not connected or the RPS DC input is
abnormal.
1-10
Port Mode LED
The port mode LED on the 3Com Baseline Switch 2928-PWR Plus/3Com Baseline Switch 2928-HPWR
Plus can display the working status of a port for you to obtain more device information. You can use the
port mode switching button to change the status of the port mode LED.
Table 1-8 3Com Baseline Switch 2928-PWR Plus/3Com Baseline Switch 2928-HPWR Plus port mode
LED description
LED Status Description
Mode
Solid green Indicates port rate.
Blinking green (1 Hz) Indicates port PoE power supply.
10/100/1000Base-T Auto-Sensing Ethernet Port Status LED
z Each port of the 3Com Baseline Switch 2952-SFP Plus has a bi-color LED indicating its status;
whereas each port of other models of the 3Com Baseline Switch 2900 Family has two LEDs, with
only one in the ON state at a time.
z For each port of the 3Com Baseline Switch 2928-PWR Plus and 3Com Baseline Switch
2928-HPWR Plus, the port mode LED and the status LED together indicate the port operation
status.
Table 1-9 10/100/1000Base-T auto-sensing Ethernet port LEDs description
Switch model
3Com Baseline
Switch
2920-SFP Plus
3Com Baseline
Switch
2928-SFP Plus
Port
mode
LED
—
Ethernet port status
LED
On
Green
Fast blinking
Off
On
Fast blinking
The port operates at a rate of 1000
Mbps
Data is being transmitted or received at
1000 Mbps
The port is not up or does not operate at
1000 Mbps
The port operates at a rate of 10/100
Mbps
Data is being transmitted or received at
10/100 Mbps
Yellow
Blinking (3
Hz)
Off
The POST has failed
The port is not up or does not operate at
10/100 Mbps
Meaning
1-11
Switch model
3Com Baseline
Switch
2952-SFP Plus
3Com Baseline
Switch
2928-PWR Plus
3Com Baseline
Switch
2928-HPWR
Plus
Port
mode
LED
—
Solid
green
(rate
mode)
Blinking
green
(PoE
mode)
Ethernet port status
LED
Solid green
Fast blinking green
Solid yellow
Fast blinking yellow
Off
On
Green
Fast blinking
Off
On
Fast blinking
Yellow
Blinking (3
Hz)
Off
On PoE power supply is normal.
Blinking at 3
Green
Hz
Off
On
Meaning
The port operates at a rate of 1000
Mbps
Data is transmitted or received at a rate
of 1000 Mbps
The port operates at a rate of 10/100
Mbps
Data is transmitted or received at a rate
of 10/100 Mbps
The port is not up or the POST has
failed
The port operates at a rate of 1000
Mbps
Data is transmitted or received at a rate
of 1000 Mbps
The port is not up or does not operate at
1000 Mbps
The port operates at a rate of 10/100
Mbps
Data is transmitted or received at a rate
of 10/100 Mbps
The POST has failed
The port is not up or does not operate at
10/100 Mbps.
Power consumption of the device
attached to the port exceeds the upper
limit of the power supply consumption of
the port, or the available power of the
switch is not enough for power supply of
the port.
No PoE power supply is provided on the
port.
The device connected to the interface is
not a PD device or a PoE failure occurs
Yellow
Blinking (3
Hz)
Off
The POST has failed
No PoE power supply is provided on the
port or PoE power supply is normal.
1-12
1000Base-X SFP Interface Status LED
For 3Com Baseline Switch 2928-PWR Plus and 3Com Baseline Switch 2928-HPWR Plus, the port
mode switching button does not take effect for the 1000Base-X SFP interface LEDs.
Table 1-10 1000Base-X SFP interface status LEDs description
LED Meaning
Solid green
The port operates at a rate of 1000 Mbps
The port is transmitting data at 1000 Mbps
Blinking green The LED is fast blinking when data is being received on the port.
Off No link is present on the port
1-13
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