Cisco 3750 - Catalyst EMI Switch User manual

Getting Started Guide
Catalyst 3750 Switch Getting Started Guide
INCLUDING LICENSE AND WARRANTY
1About this Guide
2Taking Out What You Need
3Running Express Setup
4Managing the Switch
5Planning Switch Stacks
6Rack-Mounting
7In Case of Difficulty
8Obtaining Documentation
9Documentation Feedback
10 Cisco Product Security Overview
11 Obtaining Technical Assistance
12 Obtaining Additional Publications and Information
13 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, stacking
procedures, port and module connection procedures, power connection procedures, and
troubleshooting help.
For additional installation and configuration information for Catalyst 3750 switches, see the Catalyst
3750 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 24.
For translations of the warnings that appear in this publication, see the Regulatory Compliance and
Safety Information for the Catalyst 3750 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.
Note If you do not specify the length of the StackWise cable, the 0.5-meter cable is supplied.
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 3750 Switch
Catalyst 3750 Switch
Getting Started Guide
Cisco
Product Ownership
Registration card
Catalyst 3750 switch
Console cable
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
Connector cover for redundant
power system (RPS)
Two number-4 pan-head screws
Cable guide
One black Phillips machine screw
Documentation
0.5-meter, 1.0-meter or 3.0-meter
StackWise cable
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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.
Doing 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.
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 LED remains green. If the
switch fails POST, the SYST LED turns amber.
POST errors are usually fatal. Call Cisco Systems immediately if your switch fails POST.
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 23.
Step 6 Verify that the switch is in Express Setup mode by confirming that all LEDs above the
Mode button are green. (On some switch models, the RPS LED remains off.)
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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 22 for help.
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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 who is 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,
re-enter the Telnet password.
•In the SNMP field, click Enable to enable Simple Network Management Protocol
(SNMP). Enable SNMP only if you plan to manage switches by using
CiscoWorks 2000 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 you cannot modify it. When you set the SNMP write
community, you can both access and modify SNMP information.

7
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 the PC
to the network. The network DHCP server assigns 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 you complete Express Setup and install 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, which is
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 23.

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Downloading Cisco Network Assistant
Cisco Network Assistant is a software program that you download from Cisco.com and run on
your PC. It offers advanced options for configuring and monitoring multiple devices, including
switches, switch clusters, switch stacks, routers, and access points. Network Assistant is free—there is
no charge to download, install, or use it.
Follow these steps:
1. Go to this Web address: http://www.cisco.com/go/NetworkAssistant.
You must be a registered Cisco.com user, but you need no other access privileges.
2. Find the Network Assistant installer.
3. Download the Network Assistant installer, and run it. (You can run it directly from the Web if
your browser offers this choice.)
4. When you run the installer, follow the displayed instructions. In the final panel, click Finish to
complete the Network Assistant installation.
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
– no flow control
4. Use the CLI to enter commands to configure the switch. See the software configuration guide and
the command reference for more information.

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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 Cisco Networking Services (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 23 for a list of supporting documentation.
5 Planning Switch Stacks
Before connecting the Catalyst 3750 switches in a stack, keep in mind these planning considerations:
•The size of the switch. See the“Technical Specifications” appendix of the Catalyst 3750 Switch
Hardware Installation Guide for the switch dimensions. Stacking together switches of the same
size makes it easier to cable the switches.
•Length of cable. Depending on the configuration of your switch stack, you might need different
sized cables. If you don’t specify the length of the StackWise cable, the 0.5-meter cable is supplied.
If you require the 1-meter cable or 3-meter cable, you can order it from your Cisco supplier. For
cable numbers, see the Catalyst 3750 Switch Hardware Installation Guide.
Note For concepts and procedures to manage switch stacks, refer to the switch software
configuration guide.

10
Powering Considerations
Consider the following guidelines before you power the switches in a stack:
Note Stack master elections occur over a 10-second timeframe on switches running releases earlier
than Cisco IOS Release 12.2(20)SE3.
For more information on stack master elections, see the “Managing Switch Stacks” chapter
in the switch software configuration guide.
•The sequence in which the switches are
initially powered on might affect the switch
that becomes the stack master.
•If you want a particular switch to become the
stack master, power on that switch first. This
switch becomes the stack master and remains
the stack master until a master re-election is
required. After 20 seconds, power on the
remaining switches in the stack.
•If you have no preference for which switch
becomes the stack master, power on all the
switches in the stack within a 20-second
timeframe. These switches participate in the
stack master election. Switches powered on
after the 20-second timeframe do not
participate in the election.
•Power off a switch before you add it to or
remove it from an existing switch stack.

11
Cabling Considerations
These illustrations show the recommended Catalyst 3750 switch stack configurations with redundant
StackWise cabling connections for optimized stack bandwidth. For more configuration examples, see
the Catalyst 3750 Switch Hardware Installation Guide on Cisco.com.
Vertical Stacking
In this example, the stack uses the 0.5-meter StackWise cable to make redundant connections.
In this example, the stacks use both 0.5- and 3-meter StackWise cables to make redundant connections.
86586
86585

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Side-By-Side Stacking
In this example, eight switches are stacked side-by-side with redundant connections by using 0.5- and
3-meter StackWise cables.
In this example, nine switches are stacked side-by-side with redundant connections by using 0.5- and
3-meter StackWise cables.
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
86825
90532

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6 Rack-Mounting
This section covers basic 19-inch rack-mounting and switch port connections. As an example, all the
illustrations show the Catalyst 3750G-48TS switch. You can install and connect other Catalyst 3750
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, see the Catalyst 3750
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.
•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.
– Access to the rear of the rack is sufficient
for connecting StackWise cables to
stacked switches.
•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 cable lengths for small form-factor
pluggable (SFP) modules, see the
documentation that shipped with the module.
•For cable lengths for XENPAK modules, see
the documentation that shipped with the
module.

14
Installation Warning Statements
This section includes the basic installation warning statements. Translations of these warning
statements appear in the Regulatory Compliance and Safety Information for the Catalyst 3750 Switch
document that shipped with the switch and is also available on Cisco.com.
Warning Only trained and qualified personnel should be allowed to install, replace, or service this
equipment. Statement 148
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 Installation of the equipment must comply with local and national electrical codes.
Statement 1074
Warning This equipment is intended to be grounded. Ensure that the host is connected to earth
ground during normal use. Statement 39
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

15
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 For connections outside the building where the equipment is installed, the following
ports must be connected through an approved network termination unit with integral
circuit protection: 10/100/1000 Ethernet. Statement 1044
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

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Attaching the Brackets
Use four Phillips flat-head screws to attach the long side of the brackets to Catalyst 3750 switches in
one of three mounting positions.
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Front-mounting position
Mid-rack-mounting position (telco rack)
Rear-mounting position
Number-8 Phillips
flat-head screws

17
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.
CONSOLE
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SPECIFIED IN MANUAL
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Cable
guide
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Mid-rack-mounting position (telco rack)
Rear-mounting position
Black Phillips
machine screw
Number-12 Phillips
machine screws

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Connect the StackWise Cables
Follow these steps to connect the StackWise cable to the StackWise ports:
Caution Removing and installing the StackWise cable can shorten its useful life. Do not remove
and insert the cable more often than is absolutely necessary.
Note Always use a Cisco-approved StackWise cable to connect the switches.
Step 1 Remove the dust covers from the StackWise cables and StackWise ports, and store
them for future use.
Step 2 Insert one end of the
StackWise cable into the
StackWise port on the back
of the switch.
Step 3 Use the window in the StackWise cable to align the connector correctly. Secure the
screws tightly.
Step 4 Insert the other end of the cable into the connector of the other switch, and secure
the screws tightly.
CONSOLE
STACK 1 STACK 2

19
Connect to the Switch Ports
This section describes how to connect to the fixed switch ports, the SFP module ports, and the
XENPAK module ports.
Connect to 10/100 and 10/100/1000 Ports
Follow these steps:
The fixed ports on the Catalyst 3750 Power over Ethernet (PoE) switches provide PoE support for
devices that are compliant with IEEE 802.3af, and also provide Cisco pre-standard PoE support for
Cisco IP Phones and Cisco Aironet Access Points.
Each of the Catalyst 3750-24PS switch 10/100 ports or the Catalyst 3750G-24PS switch
10/100/1000 ports can deliver up to 15.4 W of PoE. On the Catalyst 3750-48PS or 3750G-48PS
switches, any 24 of the 48 10/100 or 10/100/1000 ports can deliver 15.4 W of PoE, or any
combination of the ports can deliver an average of 7.7 W of PoE at the same time, up to a maximum
switch power output of 370 W.
By default, a Catalyst 3750 switch PoE port automatically provides power when a valid powered
device is connected to it. For information about configuring and monitoring PoE ports, see the switch
software configuration guide. For information about troubleshooting PoE problems, see the
Catalyst 3750 Switch Hardware Installation Guide on Cisco.com.
Note The automatic medium-dependent interface crossover (Auto-MDIX) feature is enabled by
default on switches running Cisco IOS Release 12.2(18)SE or later. When the Auto-MDIX
feature is enabled, the switch detects the required cable type for copper Ethernet connections
and configures the interfaces accordingly. Therefore, you can use either a crossover or a
straight-through cable for connections to a copper 10/100, 10/100/1000, or 1000BASE-T SFP
module port on the switch, regardless of the type of device on the other end of the connection.
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 10/100 or
10/100/1000 port.
Use a crossover, twisted four-pair,
Category 5 cable when you connect to
other switches, hubs, or repeaters.
Step 2 Insert the other cable end into an RJ-45 connector on the other device.
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Install the SFP Modules and Connect to the Ports
Follow these steps:
For a list of supported modules, see the release notes on Cisco.com. For detailed instructions on
installing, removing, and connecting to SFP modules, see the documentation that came with the
SFP module.
Caution Removing and installing an SFP module can shorten its useful life. Do not remove and
insert SFP modules more often than is absolutely necessary.
Verify Port Connectivity
After you connect to the switch port, the port LED turns amber while the switch establishes a link.
This process takes about 30 seconds. 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 22 for information about online assistance.
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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