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Product Overview
Ports and Slots
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.
By default, the switch selects the medium for each dual-purpose port (10/100BASE-T or SFP). When a link is achieved
on one media type, the switch disables the other media type until the active link goes down. If links are active on both
media, the SFP-module port has priority, but you can use the media-type interface configuration command to manually
designate the port as an RJ-45 port or an SFP port.
You can configure the speed and duplex settings consistent with the selected media type. For information on configuring
interfaces, see the switch software configuration guide.
Dual-Purpose Gigabit Ethernet Uplink or Downlink Ports
You can configure the dual-purpose Gigabit Ethernet uplink or downlink ports on the switch as either 10/1001000BASE-T
ports or as 100/1000 Mb/s SFP-module ports. You can set the 10/100/1000BASE-T ports to autonegotiate, or you can
configure them as fixed 10, 100, or 1000 Mb/s (Gigabit) Ethernet ports.
By default, the switch selects the medium for each dual-purpose port (10/100/1000BASE-T or SFP). When a link is
achieved on one media type, the switch disables the other media type until the active link goes down. If links are active
on both media, the SFP-module port has priority, but you can use the media-type interface configuration command to
manually designate the port as an RJ-45 port or an SFP port.
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