Cisco WS-C2950-24 Hardware Installation Guide - Page 37
Gigabit Ethernet Ports, GE Ports, SFP Ports, USB Serial Console Port, Data Ports, Management Ports
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Chapter 1 Overview of the Routers Hardware Features Table 1-4 Summary of Cisco 2900 series and Cisco 3900 series Built-In Interfaces (continued) Data Ports Management Ports Router Model 10/100/1000 GE RJ-45 Cisco 3945 with SPE 150 32 Cisco 3925E with SPE 200 43 Cisco 3945E with SPE 250 44 10/100/1000 SFP 2 2 2 USB Type A 2 2 2 Console Serial, RJ-45 1 1 1 Console Serial, Mini-USB Auxiliary, (Type B) RJ-45 1 1 1 1 1 1 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. Table 1-4 on page 1-16 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 3-36 for driver installation instructions. OL-18712-02 Cisco 2900 Series and 3900 Series Hardware Installation Guide 1-17