Cisco 3750 - Catalyst EMI Switch Instruction sheet

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Switch Installation
This chapter describes how to start your switch and how to interpret the power-on
self-test (POST) that ensures proper operation. It describes the planning and
cabling considerations to keep in mind while planning your stack. It describes
how to install the switch and make connections to the switch. Read the topics and
perform the procedures in this order:
•Preparing for Installation, page 3-1
•Verifying Switch Operation, page 3-8
•Planning the Stack, page 3-11
•Installing the Switch, page 3-16
•Connecting the StackWise Cable to the StackWise Ports, page 3-35
•Connecting to the 10/100 and 10/100/1000 Ports, page 3-42
•Connecting to a SFP Module, page 3-44
•Where to Go Next, page 3-46
Preparing for Installation
This section covers these topics:
•Warnings, page 3-2
•EMC Regulatory Statements, page 3-4
•Installation Guidelines, page 3-6

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•Verifying Package Contents, page 3-7
•Verifying Switch Operation, page 3-8
Warnings
These warnings are translated into several languages in Appendix C, “Translated
Safety Warnings.”
Warning This equipment is to be installed and maintained by service personnel only as
defined by AS/NZS 3260 Clause 1.2.14.3 Service Personnel.
Warning Onlytrainedandqualifiedpersonnelshouldbeallowedtoinstallorreplacethis
equipment.
Warning Read the installation instructions before you connect the system to its power
source.
Warning Before working on equipment that is connected to power lines, remove jewelry
(including rings, necklaces, and watches). Metal objects will heat up when
connected to power and ground and can cause serious burns or weld the metal
object to the terminals.
Warning Do not stack the chassis on any other equipment. If the chassis falls, it can
cause severe bodily injury and equipment damage.
Warning The plug-socket combination must be accessible at all times because it serves
as the main disconnecting device.

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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.
Warning When installing the unit, the ground connection must always be made first and
disconnected last.
Warning This equipment is intended to be grounded. Ensure that the host is connected to
earth ground during normal use.
Warning Do not work on the system or connect or disconnect cables during periods of
lightning activity.
Warning Ultimate disposal of this product should be handled according to all national
laws and regulations.
Warning Attach only the Cisco RPS (model PWR675-AC-RPS-N1) to the RPS receptacle.
Warning Class 1 laser product
Warning Avoid exposure to the laser beam.

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EMC Regulatory Statements
This section includes specific regulatory statements about the Catalyst 3750
family of switches.
U.S.A.
U.S. regulatory information for this product is in the front matter of this manual.
Taiwan
This is a Class A Information product. When used in a residential environment, it
may cause radio frequency interference. Under such circumstances, the user may
be requested to take appropriate countermeasures.
Japan
This is a Class A product based on the standard of the Voluntary Control Council
for Interference by Information Technology Equipment (VCCI). If this equipment
is used in a domestic environment, radio disturbance may arise. When such
trouble occurs, the user may be required to take corrective actions.
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Korea
Hungary
This equipment is a Class A product and should be used and installed properly
according to the Hungarian EMC Class A requirements (MSZEN55022). Class A
equipment is designed for typical commercial establishments for which special
conditions of installation and protection distance are used.
Figyelmeztetés a felhasználói kézikönyv számára:
Ez a berendezés “A” osztályú termék, felhasználására és üzembe helyezésére a
magyar EMC “A” osztályú követelményeknek (MSZ EN 55022) megfeleloen
kerülhet sor, illetve ezen “A” osztályú berendezések csak megfelelo kereskedelmi
forrásból származhatnak, amelyek biztosítják a megfelelo speciális üzembe
helyezési körülményeket és biztonságos üzemelési távolságok alkalmazását.
Warning This is a Class A Device and is registered for EMC requirements for industrial
use. The seller or buyer should be aware of this. If this type was sold or
purchased by mistake, it should be replaced with a residential-use type.

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Installation Guidelines
When determining where to place the switch, be sure to observe these
requirements:
•For 10/100 and 10/100/1000 ports, cable lengths from the switch to connected
devices are up to 328 feet (100 meters).
•Table 3-1 lists the cable stipulations for 1000BASE-SX and 1000BASE-LX
SFP connections. The only restriction is that each port must match the
wave-length specifications on the other end of the cable, and the cable must
not exceed the stipulated cable length for reliable communications.
•Operating environment is within the ranges listed in Appendix A, “Technical
Specifications.”
•Clearance to front and rear panels is such that
– Front-panel indicators can be easily read.
– Access to ports is sufficient for unrestricted cabling.
Make sure that there is access to the rear of the rack if you are planning
to stack the switches. If you do not have access to the rear panel, make
sure you cable the switches before you rack mount them.
– Rear-panel power connector is within reach of an AC power receptacle.
Table 3-1 Cabling Stipulations for SFP Modules
SFP
Module
62.5/125 micron
Multimode
850 nm1Fiber
1. nm = nanometer
50/125 micron
Multimode
850 nm Fiber
62.5/125 micron
Multimode
1310 nm Fiber
50/125 micron
Multimode
1310 nm Fiber
9/125 micron
Single-mode
1310 nm Fiber
8 micron
Single-mode
Dispersion
Shifted Fiber
SX 275 m2at
200 Mhz-km
2. m = meter
550 m at
500 Mhz-km ————
LX — — 550 m at
500 Mhz-km 550 m at 400 Mhz-km 10 km —

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Chapter 3 Switch Installation Preparing for Installation
•Cabling is away from sources of electrical noise, such as radios, power lines,
and fluorescent lighting fixtures. Make sure the cabling is safely away from
other devices that might damage the cables.
•Airflow around the switch and through the vents is unrestricted.
•Temperature around the unit does not exceed 113˚F (45˚C).
Note If the switch is installed in a closed or multirack assembly, the
temperature around it might be greater than normal room temperature.
Verifying Package Contents
Note Carefully remove the contents from the shipping container, and check each item
for damage. If any item is missing or damaged, contact your Cisco representative
or reseller for support. Return all packing material to the shipping container, and
save it.
The switch is shipped with these items:
•This Catalyst 3750 Switch Hardware Installation Guide
•About the Catalyst 3750 Documentation flyer
•AC power cord (AC-powered switches)
•One RJ-45-to-DB-9 adapter cable
•Mounting kit containing:
– Four rubber feet for mounting the switch on a table
– Two 19-inch rack-mounting brackets
– Four Phillips flat-head screws for attaching the brackets to the switch
(Catalyst 3750G-24TS switch)
– Six Phillips flat-head screws for attaching the brackets to the switch
(Catalyst 3750-24TS, 3750G-24T, and 3750-48TS switches)
– Four Phillips machine screws for attaching the brackets to a rack
– One cable guide and one black Phillips machine screw for attaching the
cable guide to one of the mounting brackets

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– One Redundant Power System (RPS) connector cover (for wall
mounting)
– Two Phillips pan-head screws (for attaching the RPS cover)
– Four Phillips truss-head screws (for wall-mounting brackets)
– StackWise cable. Depending on the cable that you ordered, you will have
either the 0.5-meter, 1-meter, or the 3-meter cable.
Verifying Switch Operation
Before installing the switch in a rack, on a wall, or on a table or shelf, you should
power the switch and verify that the switch passes POST. These sections describe
the steps required to connect a PC to the switch console port, and to power on the
switch and observe POST:
•Connecting a PC or Terminal to the Console Port, page 3-8
•Powering On the Switch and Running POST, page 3-10
Connecting a PC or Terminal to the Console Port
To connect a PC to the console port, use the supplied RJ-45-to-DB-9 adapter
cable. To connect the switch console port to a terminal, you need to provide a
RJ-45-to-DB-25 female DTE adapter. You can order a kit (part number
ACS-DSBUASYN=) containing that adapter from Cisco. For console port and
adapter pinout information, see the “Cable and Adapter Specifications” section on
page B-5.
The terminal-emulation software—frequently a PC application such as
Hyperterminal or Procomm Plus—makes communication between the switch and
your PC or terminal possible.
Follow these steps to connect the PC or terminal to the switch:
Step 1 Configure the baud rate and character format of the PC or terminal to match these
console port default characteristics:
•9600 baud
•8 data bits
•1 stop bit

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•No parity
•None (flow control)
After you have gained access to the switch, you can change the console baud rate
through the Administration > Console Baud Rate window in the Cluster
Management Suite (CMS).
Step 2 Using the supplied RJ-45-to-DB-9 adapter cable, insert the RJ-45 connector into
the console port, as shown in Figure 3-1.
Step 3 Attach the DB-9 female DTE adapter of the RJ-45-to-DB-9 adapter cable to a PC,
or attach an appropriate adapter to the terminal.
Step 4 Start the terminal-emulation program if you are using a PC or terminal.
Figure 3-1 Connecting to the Console Port
1Console port
CONSOLE
STACK 1 STACK 2
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Powering On the Switch and Running POST
If your configuration has an RPS, connect the switch and the RPS to the same AC
power source. See the “Power Connectors” section on page 2-15, and refer to the
Cisco RPS documentation for more information.
Note Always put the RPS in standby mode when you are connecting devices to it and
in active mode during normal operation.
To power on the switch, follow these steps:
Step 1 Make sure that you have started the terminal emulation software program (such as
ProComm, HyperTerminal, tip, or minicom) from your management station. See the
“Connecting a PC or Terminal to the Console Port” section on page 3-8 for
information on connecting to the switch console port.
Step 2 Connect one end of the AC power cord to the AC power connector on the switch.
Step 3 Connect the other end of the power cord to an AC power outlet.
If you are installing the Catalyst 3750-24TS, 3750G-24T, or 3750-48TS switches,
you can use the Cisco RPS 300.
Warning Attach only the Cisco RPS 300 (model PWR300-AC-RPS-N1) to the RPS
receptacle
If you are installing the Catalyst 3750-24TS, 3750G-24T, 3750G-24T, or the
3750-48TS switches, you can use the Cisco RPS 675.
Warning Attach only the Cisco RPS 675 (model PWR675-AC-RPS-N1=) to the RPS
receptacle
As the switch powers on, it begins POST, a series of tests that run automatically
to ensure that the switch functions properly. When the switch begins POST, the
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LEDs turn green. The System LED flashes green, and the other LEDs remain
continuous green. If POST fails, see Chapter 4, “Troubleshooting,” to determine
a course of action.
When the POST completes successfully, the System LED remains green. The RPS
LED remains green for some time and then resumes to the operating status. The
other LEDs turn off and resume their operating status.
Powering Off the Switch and Disconnecting the Console Port
Disconnect the power cord from the switch. Disconnect the cable from the switch
console port. Install the switch in a rack, on a wall, or on a table or shelf as
described in the “Installing the Switch” section on page 3-16.
Planning the Stack
If you plan to stack your switches, read these sections:
•Planning Considerations, page 3-11
•Powering Considerations, page 3-12
•Cabling Considerations, page 3-13
•Recommended Cabling Configurations, page 3-14
Planning Considerations
Before connecting the Catalyst 3750 switches in a stack, observe these planning
considerations:
•Size of the switch. The Catalyst 3750-24TS, 3750G-24TS, and the
3750-48TS switches are the same depth, and the Catalyst 3750G-24T switch
is deeper than the other switches. Stacking switches of the same size together
will make it easier to cable the switches together.
•Length of cable. Depending on the configurations you have, you might need
different sized cables. The 0.5-meter cable is supplied with the switch. If you
require the 1-meter cable or 3-meter cable you can order it from your Cisco

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supplier. For cable numbers see the “StackWise Ports” section on page 2-14.
The “Recommended Cabling Configurations” section on page 3-14 provides
examples of recommended configurations.
•Access to the rear ports for unrestricted cabling.
Make sure that there is access to the rear of the rack if you are planning to
stack the switches. If you do not have access to the rear panel, make sure you
cable the switches before you rack mount them.
•For concepts and procedures to manage switch stacks, refer to the switch
software configuration guide.
Powering Considerations
Consider the following guidelines before you power the switches in a stack:
•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 approximately 10 seconds
power on the remaining switches in the stack.
•If you have no preference as to which switch becomes the stack master, power
on the all the switches in the stack within a 10-second timeframe. These
switches participate in the stack master election. Switches powered on after
the 10-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.
Note For conditions that can cause a stack master re-election, or to manually elect the
stack master, refer to the “Managing Switch Stacks” chapter in the switch
software configuration guide.

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Chapter 3 Switch Installation Planning the Stack
Cabling Considerations
The illustrations in this section display cabling configuration examples that show
the stack bandwidth and possible stack partitioning.
Figure 3-2 shows an example of a stack of Catalyst 3750 switches that provides
full bandwidth and redundant connections.
Figure 3-2 Example of a Stack with Full Bandwidth Connections
Figure 3-3 shows an example of a stack of Catalyst 3750 switches with
incomplete cabling connections. This stack provides only half bandwidth and
does not have redundant connections.
Figure 3-3 Example of a Stack with Half Bandwidth Connections
Figure 3-4 and Figure 3-5 show examples of stacks of Catalyst 3750 switches
with failover conditions. In Figure 3-4, the cable is bad in link B, therefore this
stack provides only half bandwidth and does not have redundant connections. In
Figure 3-5 link B is bad; therefore, this stack partitions into two stacks with
switch 1 and switch 3 being stack masters.
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Figure 3-4 Example of a Stack with a Failover Condition
Figure 3-5 Example of a Partitioned Stack with a Failover Condition
Recommended Cabling Configurations
This section describes the recommended cabling configurations for stacking the
switches.
Rack Mounting in Vertical Racks or Table Tops
Figure 3-6 is an example of a recommended configuration using the supplied
0.5-meter StackWise cable. In this example, the switches are stacked in a vertical
rack or on a table top. This configuration provides redundant connections.
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Chapter 3 Switch Installation Planning the Stack
Figure 3-6 Stacking the Switches in a Vertical Rack
The configuration examples in Figure 3-7 use the 3-meter StackWise cable in
addition to the supplied 0.5-meter StackWise cable. This configuration also
provides redundant connections.
Figure 3-7 Stacking the Catalyst 3750 Switches in a Vertical Rack
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Side-by-Side Rack or Wall Mounting
Figure 3-8 and Figure 3-9 are examples of recommended configurations where
the switches are rack mounted side-by-side. Use the 1-meter and 3-meter
StackWise cables to connect the switches. These configuration provide redundant
connections.
Figure 3-8 Stacking up to Eight Switches in a Side-by-Side Rack
Figure 3-9 Stacking Nine Switches in a Side-by-Side Rack
Installing the Switch
This section describes these installation procedures:
•Rack Mounting, page 3-17
•Wall Mounting, page 3-29
•Table or Shelf Mounting, page 3-34
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Chapter 3 Switch Installation Installing the Switch
Rack Mounting
Warning Toprevent bodilyinjurywhenmountingor servicingthisunit inarack, youmust
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.
To install the switch in a 19-inch or 24-inch rack (24-inch racks require optional
mounting hardware), follow the instructions described in these procedures:
•Removing Screws from the Switch, page 3-18
•Attaching Brackets to the Catalyst 3750G-24TS Switch, page 3-19
•Attaching Brackets to the Catalyst 3750-24TS, 3750G-24T, and 3750-48TS
Switches, page 3-23
•Mounting the Switch in a Rack, page 3-26
•Attaching the Cable Guide, page 3-28
Note Installing the switch in a 24-inch rack requires an optional bracket kit not included
with the switch. You can order a kit containing the 24-inch rack-mounting
brackets and hardware from Cisco. For the Catalyst 3750G-24TS switches, order
part number RCKMNT-3550-1.5RU=. For the Catalyst 3750-24TS, 3750G-24T,
and 3750-48TS switches, order part number RCKMNT-1RU=.

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Removing Screws from the Switch
If you plan to install the switch in a rack, you must first remove screws in the
switch chassis so that mounting brackets can be attached. Figure 3-10 and
Figure 3-11 shows how to remove the chassis screws in a 1RU switch and
a 1.5RU switch.
Figure 3-10 Removing Screws from the Catalyst 3750-24TS, 3750G-24T, and 3750-48TS Switches
Figure 3-11 Removing Screws from the 3750G-24TS Switch
Catalyst 3750
SERIES
23X
24X
12
16 17 18 19 20 21 22 23 24
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Chapter 3 Switch Installation Installing the Switch
Attaching Brackets to the Catalyst 3750G-24TS Switch
The bracket orientation and the brackets you use depend on whether you are
attaching the brackets for a 19-inch or a 24-inch rack. For 19-inch racks, use
bracket part number 700-11523-XX; for 24-inch racks, use bracket part number
700-12398-XX. Figure 3-12 through Figure 3-17 show how to attach each type
bracket to one side of the switch. Follow the same steps to attach the second
bracket to the opposite side.
Figure 3-12 Attaching Brackets for 19-inch Racks, Front Panel Forward
1Phillips flat-head screws
SYST
RPS
MASTR
STAT
DUPLX
SPEED
STACK
MODE
13X
14X
1X
2X
11X
12X
12345678910 11 12 13 14 15 16 17
1
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Figure 3-13 Attaching Brackets for 24-Inch Racks, Front Panel Forward
1Phillips flat-head screws
SYST
RPS
MASTR
STAT
DUPLX
SPEED
STACK
MODE
1X
2X
11X
12X
12345678910 11 12
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