February
Catalyst 3750 Switch Hardware Installation Guide
Americas Headquarters
Cisco Systems, Inc 170 West Tasman Drive San Jose, CA
Turn the television or radio antenna until the interference stops
Features
Fast Ethernet Front Panel Switches
Gigabit Ethernet Switch Front Panel Descriptions
C O N T E N T S
Powering On the Switch and Running POST
Preparing for Installation
Network Configurations
Installation Guidelines
Where to Go Next
Installing and Removing SFP Modules
Troubleshooting
Port and Interface Settings
IP Settings
Entering the Initial Configuration Information D-7
Technical Specifications
Cable and Adapter Specifications
Audience
Preface
Purpose
Organization
Warning IMPORTANT SAFETY INSTRUCTIONS
Conventions
SAVE THESE INSTRUCTIONS
viii
Related Publications
Obtaining Documentation, Obtaining Support, and Security Guidelines
Product Overview
Features
Features, page Front Panel Description, page
C H A P T E R
10-Gigabit Ethernet Configuration
Front Panel Description
Fast Ethernet Front Panel Switches
Fast Ethernet Front Panel Switches, page
Gigabit Ethernet Switch Front Panel Descriptions, page
Catalyst 3750-48TS Switch Front Panel Description
Catalyst 3750-24TS Switch Front Panel Description
Figure 1-2 Catalyst 3750-24TS Front Panel
Figure 1-3 Catalyst 3750-48TS Front Panel
Catalyst 3750-48PS Switch Front Panel Description
Catalyst 3750-24PS Switch Front Panel Description
Figure 1-4 Catalyst 3750-24PS Switch Front Panel
Figure 1-5 Catalyst 3750-48PS Switch Front Panel
Catalyst 3750G-48TS Switch Front Panel Description, page
Gigabit Ethernet Switch Front Panel Descriptions
Catalyst 3750G-24PS Switch Front Panel Description, page
Catalyst 3750G-48PS Switch Front Panel Description, page
Figure 1-7 Catalyst 3750G-24T Front Panel
Catalyst 3750 Switch Hardware Installation Guide
Figure 1-8 Catalyst 3750G-24TS Front Panel
Figure 1-9 Catalyst 3750G-24TS-1U Front Panel
Catalyst 3750G-24PS Switch Front Panel Description
Catalyst 3750G-48TS Switch Front Panel Description
Figure 1-11 Catalyst 3750G-24PS Switch Front Panel
Figure 1-10 Catalyst 3750G-48TS Front Panel
Catalyst 3750G-16TD Switch Front Panel Description
Catalyst 3750G-48PS Switch Front Panel Description
Figure 1-12 Catalyst 3750G-48PS Switch Front Panel
Figure 1-13 Catalyst 3750G-16TD Switch Front Panel
10/100 and 10/100/1000 Ports
Wireless
1-10
1-11
The 10/100 ports on the Catalyst 3750-24PS and 3750-48PS switches and the 10/100/1000 ports on the Catalyst 3750G-24PS, 3750G-48PS, 3750G-24WS-S25, and 3750G-24WS-S50 switches provide PoE support for devices that are compliant with IEEE 802.3af. They also provide Cisco pre-standard PoE support for Cisco IP Phones and Cisco Aironet Access Points
100BASE-FX Ports
SFP Module Slots
1-12
LEDs
XENPAK Module Slot Catalyst 3750G-16TD Switch
SFP Modules
1-13
1-14
Catalyst 3750 Switch Hardware Installation Guide
Chapter 1 Product Overview 10/100 and 10/100/1000 Ports
OL-6336-07
Figure 1-16 Catalyst 3750G-12S and Catalyst 3750G-12S-SD Switch LEDs
1. The RPS LED is not used on the Catalyst 3750G-12S-SD switch
1-15
Catalyst 3750 Switch Hardware Installation Guide
Figure 1-18 Catalyst 3750G-24WS-S25 and 3750G-24WS-S50 Switch LEDs
1-16
Chapter 1 Product Overview 10/100 and 10/100/1000 Ports
System Status
Color
Color
RPS Status
Mode LED
Port Mode
Port Mode
Description
Meaning of LED Colors in Different Modes on the Switch
Port Mode
Port LED Color
Meaning
Stack LED
Port Mode
Port LED Color
Meaning
1-21
1 Stack member 1 3 Stack member 2 Stack member
Rear Panel Overview
Rear Panel Description
Power Connectors, page Console Port, page
Catalyst 3750G-24TS Switch Rear Panel, Figure
Figure 1-21 Catalyst 3750G-24TS Switch Rear Panel
Catalyst 3750G-12S-SD Switch Rear Panel
1-23
Figure 1-23 Catalyst 3750-24FS Switch Rear Panel
Catalyst 3750-24PS and Catalyst 3750-48PS Switches Rear Panel
1-24
StackWise Ports
Power Connectors
1-25
STACK A
DC Power Connector
Internal Power Supply Connector
Cisco RPS Connector
Cisco RPS
Management Options
Console Port
1-27
1-28
Network Configurations
Preparing for Installation
Switch Installation
Preparing for Installation, page Verifying Switch Operation, page
Planning the Stack, page Installing the Switch, page
PWR-RPS2300, PWR675-AC-RPS-N1=. Statement
Warnings
Warning Class 1 laser product. Statement
Warning No user-serviceable parts inside. Do not open. Statement
Catalyst 3750G Integrated Wireless LAN Controller Switches
Installation Guidelines
Verifying Switch Operation
Verifying Package Contents
Planning Considerations, page Powering Considerations, page
Planning the Stack
Cabling Considerations, page Recommended Cabling Configurations, page
Warning Attach only the Cisco RPS model to the RPS receptacle
Powering Considerations
Planning Considerations
Cabling Considerations
Figure 2-1 Example of a Stack with Full Bandwidth Connections
A B C
Figure 2-2 Example of a Stack with Half Bandwidth Connections
Figure 2-3 Example of a Stack with a Failover Condition
Recommended Cabling Configurations
Stacking Switches in Vertical Racks or on a Table
2-10
Rack-Mounting
Installing the Switch
Side-by-Side Mounting in a Rack or on a Wall
Rack-Mounting, page Wall-Mounting, page
Attaching Brackets to the Catalyst 3750G-24TS Switch, page
Removing Screws from the Switch, page
Attaching Brackets to All Other Catalyst 3750 Switches, page
Mounting the Switch in a Rack, page Attaching the Cable Guide, page
2-13
Figure 2-12 Removing Screws from the 3750G-24TS Switch
2-14
Attaching Brackets to the Catalyst 3750G-24TS Switch
Catalyst 3750 Switch Hardware Installation Guide
Chapter 2 Switch Installation Installing the Switch
POWER
2-15
Catalyst 3750 Switch Hardware Installation Guide
Chapter 2 Switch Installation Installing the Switch
POWER
2-16
2-17
SERVICE
Figure 2-20 Attaching Brackets for 19-Inch Racks, Front Panel Forward
Figure 2-21 Attaching Brackets for 19-Inch Racks, Rear Panel Forward
Attaching Brackets to All Other Catalyst 3750 Switches
2-18
Figure 2-22 Attaching Brackets for 19-Inch Telco Racks
Attaching Brackets for 19-Inch Racks and 19-Inch Telco Racks
2-19
Figure 2-23 Rack-Mounting Brackets
Catalyst 3750 Switch Hardware Installation Guide
Chapter 2 Switch Installation Installing the Switch
POWER
2-20
2-21
Attaching Brackets for 23-Inch Racks
Figure 2-27 Attaching Brackets for 19-Inch Telco Racks
Figure 2-28 Attaching Brackets for 23-Inch Racks, Front Panel Forward
2-22
Attaching Brackets for 24-Inch Racks and 24-Inch Telco Racks
Figure 2-30 Attaching Brackets for 24-Inch Racks, Front Panel Forward
Figure 2-31 Attaching Brackets for 24-Inch Racks, Rear Panel Forward
2-23
Attaching Brackets for ETSI Racks
Figure 2-32 Attaching Brackets for 24-Inch Telco Racks
Figure 2-33 Attaching Brackets for ESTI Racks, Front Panel Forward
2-24
Mounting the Switch in a Rack
750G SERIES
2-25
2-26
Attaching the Cable Guide
Attaching the Brackets to the Switch for Wall-Mounting, page
Wall-Mounting
Attaching the RPS Connector Cover, page
Mounting the Switch on a Wall, page
Attaching the RPS Connector Cover
Attaching the Brackets to the Switch for Wall-Mounting
Statement
2-28
Mounting the Switch on a Wall
Figure 2-43 Mounting the Switch on a Wall
2-29
Connecting StackWise Cable to StackWise Ports
Table- or Shelf-Mounting
2-30
STACK 1 STACK
2-31
Figure 2-44 Inserting the StackWise Cable in a StackWise Port
STACK
STACK
STACK
STACK
Installing and Removing SFP Modules
Installing SFP Modules into SFP Module Slots
2-33
2-34
Removing SFP Modules from SFP Module Slots
Removing SFP Modules from SFP Module Slots, page
Installing and Removing XENPAK Modules Catalyst 3750G-16TD Switch
Removing a XENPAK Module, page
2-35
2-36
Installing a XENPAK Module
Figure 2-51 Removing the XENPAK Module Slot Cover
2-37
series 104764
series 104573
Removing a XENPAK Module
2-38
Figure 2-53 Removing a XENPAK Module
2-39
Connecting to the 10/100 and 10/100/1000 Ports
Crossover Cable
Device
2-40
Straight-Through Cable
Connecting to a Fiber-Optic SFP Module
Connecting to an SFP Module
Warning Class 1 laser product. Statement
2-41
2-42
Step 4 Observe the port status LED
Connecting to 1000BASE-T SFP Modules
Figure 2-57 Connecting to an SFP Module Port
2-43
Connecting to a XENPAK Module
Warning Class 1 laser product. Statement
2-44
2-45
Where to Go Next
Catalyst 3750 Switch Hardware Installation Guide
Chapter 2 Switch Installation Where to Go Next
2-46
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Diagnosing Problems
Troubleshooting
Diagnosing Problems, page
Clearing the Switch IP Address and Configuration, page
Monitor Switch LEDs
Verify Switch POST Results
Verify Switch Connections
Bad or Damaged Cable
Transceiver Module Port Issues
Link Status
PoE Connections
Port and Interface Settings
Ping the End Device
Spanning Tree Loops
Speed, Duplex, and Autonegotiation
Monitor Switch Performance
Autonegotiation and NIC Cards
Cabling Distance
Replacing a Failed Stack Member
Clearing the Switch IP Address and Configuration
Figure 3-2, Catalyst 3750G-16TD Switch Serial Number Location
Finding the Switch Serial Number
Figure 3-3, Catalyst 3750-24PS Switch Serial Number Location
Figure 3-5, Catalyst 3750G-24TS Switch Serial Number Location
Figure 3-3 Catalyst 3750-24PS Switch Serial Number Location
Figure 3-2 Catalyst 3750G-16TD Switch Serial Number Location
Chapter 3 Troubleshooting Finding the Switch Serial Number
Catalyst 3750 Switch Hardware Installation Guide
Figure 3-6 Catalyst 3750-24TS Switch Serial Number Location
Figure 3-5 Catalyst 3750G-24TS Switch Serial Number Location
Figure 3-7 Catalyst 3750-24PS Switch Serial Number Location
Chapter 3 Troubleshooting Finding the Switch Serial Number
Figure 3-9 Catalyst 3750-48PS Switch Serial Number Location
Figure 3-8 Catalyst 3750G-24WS Switch Serial Number Location
Chapter 3 Troubleshooting
Finding the Switch Serial Number
Chapter 3 Troubleshooting Finding the Switch Serial Number
Figure 3-11 Catalyst 3750-48TS Switch Serial Number Location
Catalyst 3750 Switch Hardware Installation Guide
3-11
Catalyst 3750 Switch Hardware Installation Guide
Chapter 3 Troubleshooting Finding the Switch Serial Number
3-12
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A P P E N D I X A
Technical Specifications
Physical Dimensions
Power Requirements
Power Requirements
Physical Dimensions
Physical Dimensions
Power Requirements
Table A-3 Specifications for the Catalyst 3750-24FS Switch
Environmental Ranges
Physical Dimensions
Power Requirements
Table A-4 Specifications for the Catalyst 3750-24TS Switch
Environmental Ranges
Physical Dimensions
Power Requirements
Table A-5 Specifications for the Catalyst 3750G-24T Switch
Environmental Ranges
Power over Ethernet
Power Requirements
Physical Dimensions
Table A-6 Specifications for the Catalyst 3750-24PS Switch
Power over Ethernet
Power Requirements
Physical Dimensions
Table A-7 Specifications for the Catalyst 3750G-24PS Switch
Power over Ethernet
Power Requirements
Physical Dimensions
Table A-8 Specifications for the Catalyst 3750-48PS Switch
Power over Ethernet
Power Requirements
Physical Dimensions
Table A-9 Specifications for the Catalyst 3750G-48PS Switch
Physical Dimensions
Power Requirements
Table A-10 Specifications for the Catalyst 3750G-16TD Switch
Environmental Ranges
Physical Dimensions
Power Requirements
Table A-11 Specifications for the Catalyst 3750G-24TS Switch
Environmental Ranges
Physical Dimensions
Power Requirements
Table A-12 Specifications for the Catalyst 3750G-24TS-1U Switch
Environmental Ranges
Physical Dimensions
Power Requirements
Power Requirements
Physical Dimensions
Power over Ethernet
Power Requirements
Physical Dimensions
Environmental Ranges
Connector Specifications
Connector and Cable Specifications
“Connector Specifications” section on page B-1
“Cable and Adapter Specifications” section on page B-5
100BASE-FX Ports
10/100 and 10/100 /1000 Ports
Figure B-1 10/100 Port Pinouts
Figure B-2 10/100/1000 Port Pinouts
SFP Module Ports
Type
Cisco Part Number
XENPAK
XENPAK Module Ports Catalyst 3750G-16TD Switch
Wavelength
Maximum Distance
SFP Module Cable Specifications
Cable and Adapter Specifications
SFP Module Cable Specifications, page B-5
Console Port
Wavelength
Two Twisted-Pair Cable Pinouts
SFP Module
nanometers
Two Twisted-Pair Crossover Cable Schematic
Four Twisted-Pair Cable Pinouts for 10/100 Ports
Four Twisted-Pair Crossover Cable Schematic for 10/100/1000 Ports
Figure B-8
Identifying a Crossover Cable
Crossover Cable and Adapter Pinouts
Four Twisted-Pair Cable Pinouts for 1000BASE-T Ports
Switch Console
Table B-4 Console Port Signaling Using a DB-9 Adapter
Switch Console
Switch Console
RJ-45-to-DB-9
Console
Connecting to DC Power
Connecting to DC Power
Preparing for Installation, page C-2 Grounding the Switch, page C-2
Wiring the DC-Input Power Source, page C-4
Grounding the Switch
Preparing for Installation
Page
Wiring the DC-Input Power Source
Figure C-6 Stripping the DC-Input Power Source Wire
Figure C-5 Positive and Negative Positions on the Switch Rear Panel
Figure C-7 Inserting Wires in the Terminal Block Plug
Figure C-8 Torquing the Terminal-Block Captive Screws
Figure C-9 Completed Wiring of Terminal Block Plug
Page
1. Accessing the CLI, page D-2 2. Taking Out What You Need, page D-3
Configuring the Switch with the CLI-Based Setup Program
3. Stacking the Switches Optional, page D-4
4. Connecting to the Console Port, page D-5
Accessing the CLI Through Express Setup
Accessing the CLI
Accessing the CLI Through the Console Port
Entering the Initial Configuration Information, page D-7
Taking Out What You Need
Stacking the Switches Optional
Connecting to the Console Port
Starting the Terminal Emulation Software
Connecting to a Power Source
Entering the Initial Configuration Information
IP Settings
Completing the Setup Program
Page
Page
Entering the Initial Configuration Information
Appendix D Configuring the Switch with the CLI-Based Setup Program
Catalyst 3750 Switch Hardware Installation Guide
D-10
Numerics
I N D E
IN-1
IN-2
IN-3
IN-4
IN-5
IN-6
2 RD– 
