Hardware Features Of Cisco 4000 Series Isrs; Built-In Interface Ports; Dual Mode Ge Or Sfp Ports - Cisco 4451 ISR Hardware Installation Manual

Hardware Features of Cisco 4000 Series ISRs

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Hardware Features of Cisco 4000 Series ISRs
This section describes the hardware features of Cisco 4000 Series ISRs.
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Built-In Interface Ports

Cisco 4000 Series ISRs have multiple 10/100/1000 front panel ports, SFPs, and 10/100/1000
management ports.

Dual Mode GE or SFP Ports

There are dual mode ports available on the router that can function as GE or SFP ports.
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 with the same number. At a time, it can
only be used for one function. As described in the IEEE 802.3ah specification, the SFP port supports
auto-media-detection, auto-failover and remote fault indication (RFI).
Use the media-type {rj45{auto-failover}} | {sfp{auto-failover}} command to enable the
auto-media-detection and auto-failover features.
You can configure the SFP port by using the media-type configuration command to select either the
RJ-45 or the SFP connector. When the media-type is not configured, by default, the auto-select feature
is enabled. The auto-select feature automatically detects the media that is connected and links it up. If
both media are connected, the media that comes up first is linked and is the primary media. This primary
media is explicitly indicated as an SFP or RJ-45 link. When the router receives an indication that the
primary media is down, the secondary failover media is enabled. After the switchover, when the primary
media is later restored, the media does not switch back to the primary media. By default, the RJ-45 port
is configured as the primary media-type and if it fails, the media failovers to the SFP port. Conversely,
when the SFP port is configured as the primary media-type and if it fails, the media failovers to the RJ-45
port.
Hardware Installation Guide for the Cisco 4000 Series Integrated Services Router
1-26
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Built-In Interface Ports, page 1-26
LED Indicators, page 1-27
Fans, Ventilation, and Airflow, page 1-37
Chapter 1 Overview of Cisco 4000 Series ISRs
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