Chapter 2 Product Overview
Front Panel Description
2-12
Catalyst 3750 Switch Hardware Installation Guide
78-15136-03
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, refer to the switch software
configuration guide or the switch command reference.
SFP Module Slots
Catalyst 3750 switches with SFP module slots support these SFP modules:
• 1000BASE-SX
• 1000BASE-LX
• 1000BASE-ZX
• 1000BASE-T
• CWDM
For a list of the SFP modules that the switches support, refer to the Catalyst 3750
release notes.
SFP Modules
The Catalyst 3750 switch uses Gigabit Ethernet SFP modules to establish
fiber-optic connections. These transceiver modules are field-replaceable,
providing the uplink interfaces when inserted in an SFP module slot. You can use
the SFP modules for Gigabit uplink connections to other switches. You use
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