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Cisco Catalyst Blade Switch 3040 for FSC Hardware Installation Guide
OL-10694-01
Chapter 1 Product Overview
Front Panel Description
10/100/1000 Ports
The two copper Ethernet ports operate at 10, 100, or 1000 Mbps and support autonegotiation and
full-duplex operation. 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 blade 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).
You can disable autonegotiation for the two 10/100/1000BASE-T ports by using the Cisco IOS
command-line interface (CLI). For more information, see the blade switch command reference and
software configuration guide.
The ten internal downlink ports are 1000BASE-X with no negotiation for speed or duplex.
Note
1000BASE-T traffic requires at least a Category 5 cable. 10BASE-T traffic can use Category 3 or
Category 4 cables.
When you connect the blade switch to workstations, servers, routers, and Cisco IP Phones, be sure to use
a straight-through Ethernet cable. When you connect the blade switch to another blade switch, use a
crossover Ethernet cable. For any other type of connection, you can use a straight-through Ethernet
cable. When you use a straight-through or crossover cable for 1000BASE-T connections, be sure to use
a twisted four-pair, Category 5 cable for proper operation. Pinouts for the cables are described in
Appendix B, “Connector and Cable Specifications.”
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 blade 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 10/100/1000 or 1000BASE-T SFP module port on the blade switch, regardless
of the type of device on the other end of the connection.
The auto-MDIX feature is enabled by default. For configuration information for this feature, refer to the
blade switch software configuration guide or command reference.
SFP Module Slots
The blade 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 fiber-optic cables with LC or MT-RJ connectors to connect to a fiber-optic SFP module. You use a
Category 5 cable with RJ-45 connectors to connect to a copper SFP module.
The four external SFP module ports operate at 1000 Mbps when fiber-optic SFP modules are installed
and operate at 10/100/1000 Mbps when copper SFP modules are installed. Autonegotation is supported
on copper SPF modules, but not on fiber-optic SFP modules.
See the blade switch release notes for the latest information about which SFP module types are
supported.
For more information about the SFP modules, refer to your SFP module documentation.
