Cisco Catalyst 3750 Hardware Installation Manual page 131

Chapter 3 Switch Installation
You can use the mdix auto interface configuration command in the CLI to enable
Note
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, refer to the switch software
configuration guide or the switch command reference.
Follow these steps to connect to 10BASE-T, 100BASE-TX or 1000BASE-T
devices:
PoE faults are caused when noncompliant cabling or powered devices are
Caution
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.
When connecting to workstations, servers, routers, and Cisco IP Phones, connect
Step 1
a straight-through cable to an RJ-45 connector on the front panel. (See
Figure
(See the
descriptions.)
Note
78-15136-03
3-45.) When connecting to switches or repeaters, use a crossover cable.
"Cable and Adapter Specifications" section on page B-5
When connecting to 1000BASE-T-compatible devices, be sure to use a
twisted four-pair, Category 5 cable.
Catalyst 3750 Switch Hardware Installation Guide
Connecting to the 10/100 and 10/100/1000 Ports
for cable-pinout
3-53