1-18
Cisco 2900 Series and 3900 Series Hardware Installation Guide
OL-18712-02
Chapter 1 Overview of the Routers
Hardware Features
GE Ports
The GE RJ-45 copper interface ports support 10BASE-T, 100BASE-TX, and 1000BASE-T.
SFP Ports
The small-form-factor pluggable (SFP) ports support 1000BASE-LX/LH, 1000BASE-SX,
1000BASE-ZX, and Coarse Wavelength-Division Multiplexing (CWDM-8) modules, as well as 100Mbs
SFP modules.
The SFP port shares the same physical port as an RJ-45 GE port.
Table 1-4 on page 1-17
shows the
models that support SFP installation. The SFP port supports auto-media-detection, auto-failover and
remote fault indication (RFI), as described in the IEEE 802.3ah specification.
Use the
media-type
{
rj45
{
auto-failover
}} | {
sfp
{
auto-failover
}} command to enable the
auto-media-detection and auto-failover features. Use the
Command Lookup Tool
for details about this
command.
The SFP port can be configured for the following behaviors:
•
Always use the RJ-45 port.
•
Always use the SFP port.
•
Always use the RJ-45 port but fail over to the SFP port if the RJ-45 port fails. This is the default
configuration.
•
Always use the SFP port but fail over to the RJ-45 port if the SFP port fails.
USB Serial Console Port
The Mini-USB type B serial port has been enabled to perform management tasks on the router. To use
this port, you must install a Windows USB device driver before establishing physical connectivity
between a personal computer and the router. See the
“Installing the Cisco Microsoft Windows USB
Device Driver” section on page 3-35
for driver installation instructions.
Removable and Interchangeable Modules and Cards
Table 1-5 on page 1-20
summarizes the type of removable modules and cards that can be installed in the
router to provide specific capabilities. Services Performance Engines (SPEs), Service Modules (SMs),
and Enhanced High-Speed WAN Interface Cards (EHWICs) fit into external slots and can be removed
or replaced without opening the chassis.
Internal Services Modules (ISMs), expansion DRAM memory modules and next-generation Packet
Voice Data Modules (PVDM3s) plug into internal connectors inside the chassis. These modules can be
removed and installed only by opening the chassis on the Cisco 3900 series, or sliding the motherboard
out of the Cisco 3900 series.
External Slots
•
Services Performance Engine, page 1-21
•
Service Modules, page 1-21
•
Enhanced High-Speed WAN Interface Cards, page 1-21
