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Cisco ME 3400 Ethernet Access Switch Hardware Installation Guide
OL-7677-04
Chapter 1 Product Overview
Front Panel Description
SFP Module Ports
The Cisco ME switch supports Gigabit Ethernet and 100 megabit Ethernet, field-replaceable
SFP transceiver modules to establish fiber-optic and copper connections to other network devices. The
SFP modules that use fiber-optic connections need fiber-optic cables with LC connectors. The
SFP modules that use copper connections need Category 5 or higher cables with RJ-45 connectors.
The Cisco ME switch uses Gigabit Ethernet SFP modules to establish fiber-optic and 1000BASE-T
connections. These transceiver modules are field-replaceable, providing the interfaces when inserted in
an SFP module slot. You can use the SFP modules for Gigabit connections to other switches.
The 10/100 Fast Ethernet ports and the dual-purpose ports on Cisco ME 3400-12CS and
Cisco ME 3400-2CS switches are configured as UNIs. The SFP module uplink ports are configured as
NNIs. If the switch is running the metro base or metro access image, you can configure only four ports
on the switch as NNIs at one time, but you can configure all ports on the switch as UNIs. Starting with
Cisco IOS Release 12.2(25)SEG, if the switch is running the metro IP access image, you can configure
an unlimited number of NNIs.
Note The Cisco ME-3400-24FS switch downlink ports support only the 100BASE-BX, 100BASE-FX, and
100BASE-LX SFP modules.
For more information on configuring interfaces, see the software configuration guide. For more
information about cabling specifications for SFP modules, see the “SFP Module Cable Specifications”
section on page A-4.
SFP Modules
The Cisco ME switch supports these Cisco SFP modules:
• 100BASE-BX
• 100BASE-FX
• 100BASE-LX
• 1000BASE-BX
• 1000BASE-LX/LH
• 1000BASE-SX
• 1000BASE-T
• 1000BASE-ZX
• CWDM
• DWDM
When installed in Cisco ME switches, 1000BASE-T SFP modules can operate at 10, 100, or 1000 Mb/s
in full-duplex mode or at 10 or 100 Mb/s in half-duplex mode. For more information about these
SFP modules, see your SFP module documentation.
You can use any combination of SFP modules that your switch supports. The only restrictions are that
each port must match the wavelength specifications on the other end of the cable and that the cable must
not exceed the stipulated cable length for reliable communications listed in the “SFP Module Cable
Specifications” section on page A-4.