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Chapter 2 Switch Installation
Connecting to the 10/100 and 10/100/1000 Ports
2-50
Catalyst 3750 Switch Hardware Installation Guide
OL-6336-01
Note You can use the mdix auto interface configuration command in the CLI to enable
the automatic medium-dependent interface crossover (Auto-MDIX) feature.
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.
The Auto-MDIX feature is enabled by default on switches running Cisco IOS
Release 12.2(18)SE or later. For releases between Cisco IOS
Release 12.1(14)EA1 and 12.2(18)SE, the Auto-MDIX feature is disabled by
default. For configuration information for this feature, see the switch software
configuration guide or the switch command reference.
Follow these steps to connect to 10BASE-T, 100BASE-TX or 1000BASE-T
devices:
Caution PoE faults are caused when noncompliant cabling or powered devices are
connected to a PoE port. Only standard-compliant cabling can be used to connect
Cisco pre-standard IP Phones and wireless access points or
IEEE 802.3af-compliant devices to PoE ports. A cable or device that causes a
PoE fault must be removed from the network.
Step 1 When connecting to workstations, servers, routers, and Cisco IP Phones, connect
a straight-through cable to an RJ-45 connector on the front panel. (See
Figure 2-44.) When connecting to switches or repeaters, use a crossover cable.
(See the “Cable and Adapter Specifications” section on page B-5 for cable-pinout
descriptions.)
Note When connecting to 1000BASE-T-compatible devices, be sure to use a
twisted four-pair, Category 5 cable.
- Catalyst 3750 Switch 1
- Hardware Installation Guide 1
- CONTENTS 5
- 2 Switch Installation 2-1 6
- 3 Troubleshooting 3-1 8
- IP Settings C-11 9
- Contents 10
- OL-6336-01 10
- Warranty Terms 11
- Duration of Hardware Warranty 12
- Audience 15
- Conventions 16
- Varoitus 17
- Attention 17
- Avvertenza 18
- Advarsel 18
- ¡Advertencia! 19
- Varning! 19
- Related Publications 24
- Obtaining Documentation 25
- Documentation Feedback 26
- Opening a TAC Case 27
- TAC Case Priority Definitions 27
- Product Overview 31
- Features 32
- Front Panel Description 34
- 1 10/100/1000 ports 35
- 10/100 and 10/100/1000 Ports 41
- SFP Module Slots 44
- XENPAK Module Slot 45
- 2 3 4 5 6 7 81 46
- 2 3 4 5 7 81 47
- System LED 48
- Master LED 49
- Port LEDs and Modes 49
- Table 1-4 Port Mode LEDs 50
- Table 1-5 PoE Mode LED 50
- Stack LED 53
- Rear Panel Description 55
- StackWise Ports 57
- Power Connectors 58
- Management Options 59
- Network Configurations 60
- Switch Installation 61
- Preparing for Installation 62
- Installation Guidelines 66
- Verifying Package Contents 68
- Verifying Switch Operation 69
- Powering Off the Switch 70
- Planning the Stack 71
- Powering Considerations 72
- Cabling Considerations 72
- 0.5-meter StackWise Cable 74
- Installing the Switch 76
- 3750G-48TS Switches 78
- 1 Phillips flat-head screws 80
- Mounting the Switch in a Rack 87
- 1 Phillips machine screws 88
- Attaching the Cable Guide 89
- Wall-Mounting 91
- Mounting the Switch on a Wall 92
- Table- or Shelf-Mounting 94
- Installing a XENPAK Module 103
- Removing a XENPAK Module 106
- Connecting to an SFP Module 112
- Statement 1008 113
- Class 1 laser product 113
- 1 LC connector 114
- Connecting to a XENPAK Module 116
- 1 SC connector 118
- Where to Go Next 119
- Troubleshooting 121
- Understanding POST Results 122
- Diagnosing Problems 123
- PoE mode LED blinks amber 127
- Note You can also use the 127
- Technical Specifications 131
- OL-6336-02 132
- Connector Specifications 145
- 10/100 and 10/100 /1000 Ports 146
- SFP Module Ports 147
- XENPAK Module Ports 148
- Console Port 148
- 10/100 ports 149
- Identifying a Crossover Cable 152
- Adapter Pinouts 153
- Signal DB-25 Pin Signal 154
- CLI-Based Setup Program 155
- Accessing the CLI 156
- Taking Out What You Need 158
- 2 Power cord 162
- Connecting to a Power Source 163
- IP Settings 165
- Completing the Setup Program 165
- Numerics 169
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