Cisco Catalyst 3550 User manual

Getting Started Guide
Catalyst 3550 Multilayer Switch Getting Started Guide
INCLUDING LICENSE AND WARRANTY
1About this Guide
2Taking Out What You Need
3Running Express Setup
4Managing the Switch
5Rack-Mounting
6Connecting to DC Power
7In Case of Difficulty
8Obtaining Documentation
9Obtaining Technical Assistance
10 Cisco Limited Lifetime Hardware Warranty Terms

2
1 About this Guide
This guide provides instructions on how to use Express Setup to initially configure your Catalyst
switch. Also covered are switch management options, basic rack-mounting procedures, port and
module connections, power connection procedures for both AC- and DC-powered switches, and
troubleshooting help.
For additional installation and configuration information, and technical specifications, refer to the
Catalyst 3550 documentation on Cisco.com. For system requirements, important notes, limitations,
open and resolved bugs, and last-minute documentation updates, see the release notes, also on
Cisco.com.
When using the online publications, refer to the documents that match the Cisco IOS software version
running on the switch. The software version is on the Cisco IOS label on the switch rear panel.
You can order printed copies of the manuals from the Cisco.com sites and from the telephone numbers
listed in the “Obtaining Documentation” section on page 23.
For translations of the warnings that appear in this publication, refer to the Regulatory Compliance
and Safety Information for the Catalyst 3550 Multilayer Switch that accompanies this guide.
2 Taking Out What You Need
Follow these steps:
1. Unpack and remove the switch and the accessory kit from the shipping box.
2. Return the packing material to the shipping container, and save it for future use.
3. Verify that you have received the items shown on page 3. If any item is missing or damaged,
contact your Cisco representative or reseller for instructions. Some switch models might include
additional items that are not shown on page 3.
Equipment That You Supply to Run Express Setup
You need to supply this equipment to run Express Setup:
•PC
•Ethernet (Category 5) straight-through cable (as shown)

3
Shipping Box Contents
Regulatory Compliance
and Safety Information
for the
Catalyst 3550 Switch
Catalyst 3550 Switch
Getting Started Guide
Cisco
Product Ownership
Registration card
Catalyst 3550 switch
Console cable
Two 19-inch
mounting brackets
Two 19-inch
mounting brackets
Four number-12 Phillips machine screws
Four number-8 Phillips truss-head screws
Six number-8 Phillips flat-head screws
Four rubber mounting feet
AC power cord (AC-powered switches only)
Connector cover for redundant
power system (RPS)
Two number-4 pan-head screws
Cable guide
One black Phillips machine screw
Documentation Ground lug
(DC-powered switches only)
Two number-10-32 screws
Terminal block
(DC-powered switches only)
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3 Running Express Setup
When you first set up the switch, you should use Express Setup to enter the initial IP information. This
enables the switch to connect to local routers and the Internet. You can then access the switch through
the IP address for further configuration.
To run Express Setup:
Step 1 Verify that no devices are connected to the switch, because during Express Setup, the
switch acts as a DHCP server. If your PC has a static IP address, before you begin you
should change your PC settings to temporarily use DHCP.
Step 2 Connect the AC power cord to the switch and to a grounded AC outlet. The power-on
self-test (POST) begins. During POST, the LEDs blink while a series of tests verify that the
switch functions properly.
For a DC-powered switch, see the “Connecting to DC Power” section on page 17 for
wiring instructions.
Step 3 Wait for the switch to complete POST. It might take several minutes for the switch to
complete POST.
Step 4 Verify that POST has completed by confirming that the SYST and STAT LEDs are green.
Step 5 Press and hold the Mode button for
3 seconds. When all of the LEDs
above the Mode button turn green,
release the Mode button.
If the LEDs above the Mode button
begin to blink after you press the
button, release it. Blinking LEDs
mean that the switch has already
been configured and cannot go into
Express Setup mode. For more
information, see the “Resetting the
Switch” section on page 21.
Step 6 Verify that the switch is in Express Setup mode by confirming that all LEDs above the
Mode button are green. (The RPS LED remains off on some switch models.)
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Step 7 Connect a straight-through
Category 5 Ethernet cable (not
provided) to any 10/100 or
10/100/1000 Ethernet port on the
switch front panel and to the
Ethernet port on the PC.
Step 8 Verify that the LEDs on both Ethernet ports are green.
Step 9 Wait 30 seconds.
Step 10 Launch a web browser on your PC.
Enter the IP address 10.0.0.1 in the
web browser, and press Enter.
Step 11 The Express Setup page appears. If it does not appear, see the “In Case of Difficulty”
section on page 20 for help.
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10
DHCP-enabled PC

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Step 12 Enter this information in the Network Settings fields:
•In the Management Interface (VLAN ID) field, the default is 1. Enter a new VLAN ID
only if you want to change the management interface through which you manage the
switch and to which you assign IP information. The VLAN ID range is 1 to 1001.
•In the IP Address field, enter the IP address of the switch. In the IP Subnet Mask field,
click the drop-down arrow, and select an IP Subnet Mask.
•In the Default Gateway field, enter the IP address for the default gateway (router).
•Enter your password in the Switch Password field. The password can be from 1 to 25
alphanumeric characters, can start with a number, is case sensitive, allows embedded
spaces, but does not allow spaces at the beginning or end. In the Confirm Switch
Password field, enter your password again.
Step 13 (Optional) You can enter the Optional Settings information now or enter it later by using
the device manager interface:
•In the Host Name field, enter a name for the switch. The host name is limited to 31
characters; embedded spaces are not allowed.
•In the System Contact field, enter the name of the person responsible for the switch.
In the System Location field, enter the wiring closet, floor, or building where the
switch is located.
•In the Telnet Access field, click Enable if you are going to use Telnet to manage the
switch by using the command-line interface (CLI). If you enable Telnet access, you
must enter a Telnet password.
•In the Telnet Password field, enter a password. The Telnet password can be from 1 to
25 alphanumeric characters, is case sensitive, allows embedded spaces, but does not
allow spaces at the beginning or end. In the Confirm Telnet Password field, enter the
Telnet password again.
•In the SNMP field, click Enable to enable Simple Network Management Protocol
(SNMP). Enable SNMP only if you plan to manage switches by using
CiscoWorks2000 or another SNMP-based network-management system.
If you enable SNMP, you must enter a community string in the SNMP Read
Community field, the SNMP Write Community field, or both. SNMP community
strings authenticate access to MIB objects. Embedded spaces are not allowed in SNMP
community strings. When you set the SNMP read community, you can access SNMP
information, but cannot modify it. When set the SNMP write community, you can
access and modify SNMP information.

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Refreshing the PC IP Address
After you complete Express Setup, you should refresh the PC IP address.
For a dynamically assigned IP address, disconnect the PC from the switch, and reconnect it to the
network. The network DHCP server will assign a new IP address to the PC.
For a statically assigned IP address, change it to the previously configured IP address.
4 Managing the Switch
After completing Express Setup and installing the switch in your network, use the device manager or
other management options described in this section for further configuration.
Using the Device Manager
The simplest way to manage the switch is by using the device manager that is in the switch memory.
This is an easy-to-use web interface that offers quick configuration and monitoring. You can access
the device manager from anywhere in your network through a web browser.
Follow these steps:
1. Launch a web browser on your PC or workstation.
2. Enter the switch IP address in the web browser, and press Enter. The device manager page appears.
3. Use the device manager to perform basic switch configuration and monitoring. Refer to the device
manager online help for more information.
4. For more advanced configuration, download and run the Cisco Network Assistant described in
the next section.
Step 14 Click Submit to save your settings, or click Cancel to clear your settings.
When you click Submit, the switch is configured and exits Express Setup mode. The PC
displays a warning message and then attempts to connect with the new switch IP address.
If you configured the switch with an IP address that is in a different subnet from the PC,
connectivity between the PC and the switch is lost.
Step 15 Disconnect the switch from the PC, and install the switch in your production network. See
the “Managing the Switch” section on page 7 for information about configuring and
managing the switch.
If you need to rerun Express Setup, see the “Resetting the Switch” section on page 21.

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Downloading Cisco Network Assistant
Cisco Network Assistant is a free software program that you download from Cisco.com and run on
your PC. Network Assistant offers advanced options for configuring and monitoring multiple devices,
including switches, switch clusters, switch stacks, routers, and access points.
Follow these steps:
1. From the device manager page, select Network Assistant.
2. Follow the instructions to download the program to your PC.
3. Use the Network Assistant to configure and monitor multiple switches and devices. Refer to the
Network Assistant online help and the getting started guide for more information.
Command-Line Interface
You can enter Cisco IOS commands and parameters through the CLI. Access the CLI either by
connecting your PC directly to the switch console port or through a Telnet session from a remote PC
or workstation.
Follow these steps:
1. Connect the supplied RJ-45-to DB-9 adapter cable to the standard 9-pin serial port on the PC.
Connect the other end of the cable to the console port on the switch.
2. Start a terminal-emulation program on the PC.
3. Configure the PC terminal emulation software for 9600 baud, 8 data bits, no parity, 1 stop bit,
and no flow control.
4. Use the CLI to enter commands to configure the switch. Refer to the software configuration guide
and the command reference for more information.
Other Management Options
You can use SNMP management applications such as CiscoWorks Small Network Management
Solution (SNMS) and HP OpenView to configure and manage the switch. You also can manage it from
an SNMP-compatible workstation that is running platforms such as HP OpenView or SunNet
Manager.
The Cisco IE2100 Series Configuration Registrar is a network management device that works with
embedded CNS agents in the switch software. You can use IE2100 to automate initial configurations
and configuration updates on the switch.
See the “Accessing Help Online” section on page 21 for a list of supporting documentation.

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5 Rack-Mounting
This section covers basic 19-inch rack-mounting and switch port connections. The illustrations in this
section show the Catalyst 3550-12T and 3550-24 switch for examples. You can install and connect
other Catalyst 3550 switches as shown in these illustrations. For alternate mounting procedures, such
as installing the switch in a 24-inch rack or on a wall, and for additional cabling information, refer to
the Catalyst 3550 Multilayer Switch Hardware Installation Guide on Cisco.com.
Equipment That You Supply
You need to supply a number-2 Phillips screwdriver to rack-mount the switch.
Before you Begin
When determining where to install the switch, verify that these guidelines are met:
•Airflow around the switch and through the
vents is unrestricted.
•Temperature around the switch does not
exceed 113°F (45°C).
•Humidity around the switch does not exceed
85 percent.
•Altitude at the installation site is not greater
than 10,000 feet (3049 m).
•Clearance to the switch front and rear panels
meets these conditions:
– Front-panel LEDs can be easily read.
– Access to ports is sufficient for
unrestricted cabling.
– AC power cord can reach from the AC
power outlet to the connector on the
switch rear panel.
– DC source wires can reach from the
circuit breaker to the terminal block plug
on the switch rear panel.
•Cabling is away from sources of electrical
noise, such as radios, power lines, and
fluorescent lighting fixtures.
•For 10/100 ports and 10/100/1000 ports, the
cable length from a switch to an attached
device cannot exceed 328 feet (100 meters).
•For 100BASE-FX ports, the cable length from
a switch to an attached device cannot exceed
6562 feet (2 kilometers).
•For cable lengths for Gigabit Interface
Converter (GBIC) modules, refer to the
documentation that shipped with the module.

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Installation Warning Statements
This section includes the basic installation warning statements.
Warning To prevent the switch from overheating, do not operate it in an area that exceeds the
maximum recommended ambient temperature of 113°F (45°C). To prevent airflow
restriction, allow at least 3 inches (7.6 cm) of clearance around the ventilation openings.
Statement 17B
Warning This equipment is intended to be grounded. Ensure that the host is connected to earth
ground during normal use. Statement 39
Warning Only trained and qualified personnel should be allowed to install, replace, or service
this equipment. Statement 1030
Warning If a redundant power system (RPS) is not connected to the switch, install an RPS
connector cover on the back of the switch. Statement 265
Warning Class 1 laser product. Statement 1008
Warning
To prevent bodily injury when mounting or servicing this unit in a rack, you must take
special precautions to ensure that the system remains stable. The following guidelines
are provided to ensure your safety:
•This unit should be mounted at the bottom of the rack if it is the only unit in the rack.
•When mounting this unit in a partially filled rack, load the rack from the bottom to the top with
the heaviest component at the bottom of the rack.
•If the rack is provided with stabilizing devices, install the stabilizers before mounting or
servicing the unit in the rack. Statement 1006

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Warning Installation of the equipment must comply with local and national electrical codes.
Statement 1074
Warning Statements for Connecting to DC Power
These statements apply when connecting a Catalyst 3550-24-DC switch to DC power.
Warning When installing the unit, always make the ground connection first and disconnect it last.
Statement 42
Warning An exposed wire lead from a DC-input power source can conduct harmful levels of
electricity. Be sure that no exposed portion of the DC-input power source wire extends
from the terminal block plug. Statement 122
Warning Before connecting or disconnecting ground or power wires to the chassis, ensure that
power is removed from the DC circuit. To ensure that all power is OFF, locate the circuit
breaker on the panel board that services the DC circuit, switch the circuit breaker to the
OFF position, and tape the switch handle of the circuit breaker in the OFF position.
Statement 140
Caution To make sure that the equipment is reliably connected to earth ground, follow the
grounding procedure instructions, and use a UL-listed lug suitable for number-6 AWG
wire and two number-10-32 ground-lug screws.
Caution You must connect the Catalyst 3550-24-DC switch only to a DC-input power source that
has an input supply voltage from –36 to –72 VDC. If the supply voltage is not in this
range, the switch might not operate properly or might be damaged.
Caution The switch must be installed with 5-A branch-circuit protection.

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Attaching the Brackets
Use four Phillips flat-head screws to attach the long side of the brackets on the Catalyst 3550-12
switches.
Number-8 Phillips
flat-head screws
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100-240V~
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DC OUTPUT 1
CONSOLE
Front-mounting position
Mid-mounting position (telco rack)
Rear-mounting position

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Attaching the Brackets
Use six Phillips flat-head screws to attach the long side of the brackets on the Catalyst 3550-24 and
3550-48 switches.
Number-8 Phillips
flat-head screws
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1
48
2
100-240V~
5-3A
50/60Hz
DC OUTPUT 1
CONSOLE
Front-mounting position
Mid-mounting position (telco rack)
Rear-mounting position

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Rack-Mount the Switch
Use the black Phillips machine screw to attach the cable guide to the left or right bracket. Use the four
number-12 Phillips machine screws to attach the brackets to the rack.
Cable
guide
Front-mounting position
Mid-mounting position
(telco rack)
Rear-mounting position
Black Phillips
machine screw
Number-12 Phillips
machine screws
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Connect to the Switch Ports
This section describes how to connect to the fixed switch ports and to the GBIC module ports.
Connect to 10/100 and 10/100/1000 Ports
Follow these steps:
Warning Voltages that present a shock hazard may exist on Power over Ethernet (PoE) circuits if
interconnections are made using uninsulated exposed metal contacts, conductors, or
terminals. Avoid using such interconnection methods, unless the exposed metal parts
are located within a restricted access location and users and service people who are
authorized within the restricted access location are made aware of the hazard. A
restricted access area can be accessed only through the use of a special tool, lock and
key or other means of security. Statement 1072
Step 1 When you connect to servers,
workstations, IP phones, wireless
access points, and routers, insert a
straight-through, twisted four-pair,
Category 5 cable in a switch
10/1001or 10/100/1000 port. Use a
crossover, twisted four-pair,
Category 5 cable when you connect
to other switches, hubs, or
repeaters.
1. The Catalyst 3550-24PWR switch 10/100 inline power ports, also referred to as pre-standard Power over
Ethernet (PoE) ports, provide –48 VDC power and protocol support for Cisco IP Phones and Cisco Aironet
Access points. See the hardware installation guide on Cisco.com for more information about PoE ports.
Step 2 Insert the other cable end into an RJ-45 connector on the other device.
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12X
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Connect to 100BASE-FX Ports
Follow these steps:
Install and Connect to GBIC Module Ports
Follow these steps:
For a list of supported modules, refer to the release notes on Cisco.com. For detailed instructions on
installing and removing modules, refer to the documentation that came with the GBIC module.
Step 1 Remove the dust plugs from the
100BASE-FX ports and the rubber
caps from the MT-RJ patch cable.
Store them for future use.
Step 2 Insert an appropriate cable into a 100BASE-FX port. Insert the other cable end into an SC
or ST port on the other device.
Step 1 Grasp the module on the sides, and
insert it into the switch slot until you
feel the connector snap into place.
Step 2 Insert an appropriate cable into the
module port. Insert the other cable end
into the other device.
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100BASE-FX ports
GBIC module
12
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GBIC module port
12
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After you connect to the switch port, the port LED turns amber while the switch establishes a link.
This process takes about 30 seconds, and then the LED turns green when the switch and the target
device have an established link. If the LED is off, the target device might not be turned on, there might
be a cable problem, or there might be a problem with the adapter installed in the target device. See the
“In Case of Difficulty” section on page 20 for information about online assistance.
6 Connecting to DC Power
To connect the Catalyst 3550-24-DC switch to a DC-input power source, follow the steps in this
section.
Equipment That You Supply
You need to supply these tools and equipment:
•Ratcheting Phillips-head torque screwdriver
•Panduit crimping tool
•6-gauge copper ground wire
•Four leads of 18-gauge copper wire
•Wire stripping tool
Ground the Switch
Follow these steps:
Step 1 Remove the ground lug and the two number-10-32 screws from the rear panel of the switch.
Step 2 If your 6-gauge ground wire is insulated,
strip it to 0.5 inch (12.7 mm).
0.5 inch (12.7 mm)

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Wiring the DC Input Power Source
Follow these steps:
Step 3 Slide the exposed area of the 6-gauge wire
into the ground lug, and use the crimping
tool to crimp the lug to the wire.
Step 4 Using the ratcheting screwdriver, torque the ground lug screws to 15 lbf-in. (240
ounce-force inches [ozf-in.]) to attach the ground lug to the switch.
Step 1 On the terminal block connector, identify the positive and negative feed positions.
Step 2 Strip each of the four wires coming from the
DC power source to 0.27 inch (6.6 mm)
± 0.02 inch (0.5 mm). Do not strip more
than the recommended amount of wire.
Step 3 Insert the four exposed wires from the DC-input power source into the terminal block plug,
matching positive to positive and negative to negative for both the A and the B feed wires.
0.27 inch (6.6 mm)

19
Caution You must connect the Catalyst 3550-24-DC switch only to a DC-input power source that
has an input supply voltage from –36 to –72 VDC. If the supply voltage is not in this
range, the switch might not operate properly or might be damaged.
Step 4 Using the ratcheting torque screwdriver,
torque each terminal block captive screw
(above the installed wire leads) to 4.5 lbf-in.
(72 ozf-in.).
Step 5 Insert the terminal block plug in the terminal
block header on the rear panel of the switch.
Step 6 Move the circuit-breaker handle for the DC power source to the on position.
Return
Negative
Return
Negative
Feed A
Feed B
36 - 72V
1 - 0.5A
A
B

20
7 In Case of Difficulty
If you experience difficulty, help is available here and on Cisco.com. This section includes Express
Setup troubleshooting, how to reset the switch, how to access help online, and where to find more
information.
Troubleshooting Express Setup
If Express Setup does not run, or if the Express Setup page does not appear in your browser:
•Did you verify that POST successfully ran
before starting Express Setup?
If not, make sure that only the SYST and STAT
LEDs are green before pressing the Mode button
to enter the Express Setup mode.
•Did you press the Mode button while the
switch was still running POST?
If yes, wait until POST completes. Power cycle the
switch. Wait until POST completes. Confirm that
the SYST and STAT LEDs are green. Press the
Mode button to enter Express Setup mode.
•Did you try to continue without confirming
that the switch was in Express Setup mode?
Verify that all LEDs above the Mode button are
green. (The RPS LED is off.) If necessary, press
the Mode button to enter Express Setup mode.
•Does your PC have a static IP address? If yes, before connecting to the switch change
your PC settings to temporarily use DHCP.
•Did you connect a crossover cable instead of
a straight-through Ethernet cable between a
switch port and the Ethernet port of the PC?
If yes, connect a straight-through cable to an
Ethernet port on the switch and PC. Wait 30
seconds before entering 10.0.0.1 in the browser.
•Did you connect the Ethernet cable to the
console port instead of to a 10/100 or
10/100/1000 Ethernet port on the switch?
If yes, disconnect from the console port. Connect
to an Ethernet port on the switch and PC. Wait 30
seconds before entering 10.0.0.1 in the browser.
•Did you wait 30 seconds after connecting the
switch and PC before entering the IP address
in your browser?
If not, wait 30 seconds, re-enter 10.0.0.1 in the
browser, and press Enter.
•Did you enter the wrong address in the
browser, or is there an error message?
If yes, re-enter 10.0.0.1 in the browser, and press
Enter.