Gigabit Ethernet Ports; Usb Serial Console Port - Cisco WS-C2950-24 Installation Manual

Chapter 1 Overview of the Routers
Table 1-4 Summary of Cisco 2900 series and Cisco 3900 series Built-In Interfaces (continued)
Router
Model
Cisco 3945 with SPE 150
Cisco 3925E with SPE 200 4
Cisco 3945E with SPE 250 4
1. One RJ-45 with 2 GE SFPs, or 3 RJ-45 GEs
2. One RJ-45 with 2 GE SFPs, or 3 RJ-45 GEs
3. Four RJ-45 or three RJ-45 with one GE-SFP, or two RJ-45 with two GE SFP
4. Four RJ-45 or three RJ-45 with one GE-SFP, or two RJ-45 with two GE SFP

Gigabit Ethernet Ports

There are two different types of Gigabit Ethernet (GE) ports available on Cisco 2900 series and Cisco
3900 series ISRs.
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.
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.
The SFP port can be configured for the following behaviors:
•
•
•
•

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
Device Driver" section on page 3-36
OL-18712-02
Data Ports
10/100/1000 10/100/1000
GE RJ-45 SFP
2
3 2
3
2
4
2
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.
Console Serial,
USB Type A RJ-45
2 1
2 1
2 1
Command Lookup Tool
"Installing the Cisco Microsoft Windows USB
for driver installation instructions.
Cisco 2900 Series and 3900 Series Hardware Installation Guide
Hardware Features
Management Ports
Console Serial,
Mini-USB Auxiliary,
(Type B) RJ-45
1 1
1 1
1 1
Table 1-4 on page 1-16 shows the
for details about this
1-17