Cisco IE-4000-4TC4G-E Hardware Installation Manual page 8

Ports and Slots
10/100/1000 BASE-T Downlink Ports
You can set the 10/100BASE-T downlink 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, make 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.
10/100/1000BASE-T Uplink Ports
The IEEE 802.3u 10/100/1000BASE-T uplink ports provide full-duplex 10, 100 or 1000 Mb/s
connectivity over Category 5 unshielded twisted pair (UTP) copper cabling. The default setting is
autonegotiate. The cable can be up to 100 m (0.1 km) in length.
100/1000 Mb/s SFP Module Downlink Slots
The IEEE 802.3u 100 Mb/s SFP module downlink slots provide full-duplex 100 Mb/s connectivity over
multi-mode (MM) fiber cables or single-mode (SM) fiber cables. These ports use a SFP fiber-optic
transceiver module that accepts a dual LC connector. Check the SFP specifications for the cable type and
length.
100/1000 Mb/s SFP Module Uplink Slots
The IEEE 802.3u 100 Mb/s SFP module uplink slots provide full-duplex 100 or 1000 Mb/s connectivity
over multi-mode (MM) fiber cables or single-mode (SM) fiber cables. These ports use a SFP fiber-optic
transceiver module that accepts a dual LC connector. Check the SFP specifications for the cable type and
length.
Dual-Purpose Fast Ethernet Downlink Ports
You can configure the dual-purpose Fast Ethernet Downlink ports on the switch as either 10/100BASE-
T ports or as 100 Mb/s SFP-module ports. You can set the 10/100 ports to autonegotiate, or you can
configure them as fixed 10 or 100 Mb/s ports.
Cisco IE 4000 Switch Hardware Installation Guide
1-4
Chapter 1
Cisco IE 4000 Switch Hardware Installation Guide
Product Overview