Cisco Catalyst 3750 Hardware Installation Manual page 88
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- Command reference manual (1154 pages) ,
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Connecting to the 10/100 and 10/100/1000 Ports
Table 2-2
Device
Switch to switch
Switch to hub
Switch to computer
or server
Switch to router
Switch to IP phone
1. 100BASE-TX and 1000BASE-T traffic requires twisted four-pair, Category 5 cable.
10BASE-T traffic can use Category 3 or Category 4 cable.
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:
PoE faults are caused when noncompliant cabling or powered devices are connected to a PoE port. Only
Caution
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
repeaters, use a crossover cable. (See the
cable-pinout descriptions.)
Note
Note
Catalyst 3750 Switch Hardware Installation Guide
2-42
Recommended Ethernet Cables
Crossover Cable
Yes
Yes
No
No
No
When connecting to 1000BASE-T-compatible devices, be sure to use a twisted four-pair,
Category 5 cable.
The Catalyst 3750 switch can connect to a Cisco IP Phone through a straight-through, twisted
four-pair Category 5 cable. The rear panel of the Cisco IP Phone might have more than one
RJ-45 connector. Use the LAN-to-phone connector to connect the Cisco IP phone to the switch.
See the Cisco IP Phone documentation for more information about connecting devices to it.
1
Straight-Through Cable
No
No
Yes
Yes
Yes
Figure
2-55.) When connecting to switches or
"Cable and Adapter Specifications" section on page B-5
Chapter 2
Switch Installation
1
OL-6336-06
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