10/100 Ports; Dual-Purpose Ports; 100Base-Fx Ports; Power And Relay Connector - Cisco IE 3000 Series Hardware Installation Manual

Chapter 1 Overview

10/100 Ports

You can set the 10/100 ports to operate at 10 or 100 Mb/s in full-duplex or half-duplex mode. You can
also set these ports for speed and duplex autonegotiation in compliance with IEEE 802.3AB. (The
default setting is autonegotiate.) When set for autonegotiation, the port senses the speed and duplex
settings of the attached device and advertises its own capabilities. If the connected device also supports
autonegotiation, the switch port negotiates the best connection (that is, the fastest line speed that both
devices support and full-duplex transmission if the attached device supports it) and configures itself
accordingly. In all cases, the attached device must be within 328 feet (100 meters). 100BASE-TX traffic
requires Category 5 cable. 10BASE-T traffic can use Category 3 or Category 4 cables.
When connecting the switch to workstations, servers, routers, and Cisco IP Phones, be sure that the cable
is a straight-through cable.
You can use the mdix auto interface configuration command in the command-line interface (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. For configuration information for this feature, see the switch
software configuration guide or the switch command reference.

Dual-Purpose Ports

A dual-purpose port can be configured as either a 10/100/1000 port or as an SFP module port. Only one
port can be active at a time. If both ports are connected, the SFP module port has priority.
You can set the 10/100/1000 ports to operate at 10, 100, or 1000 Mb/s in full-duplex or half-duplex
mode. You can configure them as fixed 10, 100, or 1000 Mb/s (Gigabit) Ethernet ports and can configure
the duplex setting. (See the switch software configuration for more information.)
You can use Gigabit Ethernet SFP modules to establish fiber-optic connections to other switches. These
transceiver modules are field-replaceable, providing the uplink interfaces when inserted in an SFP
module slot. You use fiber-optic cables with LC connectors to connect to a fiber-optic SFP module.
For more information about these SFP modules, see your SFP module documentation or the release note
for your switch software.

100BASE-FX Ports

The IEEE 802.3u 100BASE-FX ports provide full-duplex 100 Mb/s connectivity over multimode fiber
(MMF) cables. These ports use a small-form-factor fixed (SFF) fiber-optic transceiver module that
accepts a dual LC connector. The cable can be up to 1.24 miles (2 km) in length.

Power and Relay Connector

You connect the DC power and alarm signals to the switch through two front panel connectors. One
connector provides primary DC power (supply A) and the major alarm signal, and a second connector
(supply B) provides secondary power and the minor alarm signal. The two connectors are physically
identical and are in the upper left side of the front panel. See
OL-13017-01
Figure 1-2.
Cisco IE 3000 Switch Hardware Installation Guide
Front-Panel Description
1-5