Fiber-Optic Specifications
The specification for optical fiber transmission defines two types of fiber: single mode and multimode. Within
the single-mode category, three transmission types are defined: short reach, intermediate reach, and long
reach. Within the multimode category, only short reach is available. For information about optical SFP modules,
see the documentation for the SFP module at:
http://www.cisco.com/en/US/partner/products/hw/modules/
ps5455/prod_installation_guides_list.html
LED Summary
The following sections describe the meanings of the LEDs on the Cisco ASR 902 Router:
RSP LEDs
ASR900-RSP LED
Table 30: ASR900-RSP LEDs
Description (two LEDs for each
port)
Color/State
LED
Disabled/no power to RSP
Off
Power (PWR)
Power rails on RSP in range
Green
Disabled/power down
Off
Status (STAT)
Failure to boot (lit at reset)
Red
Rommon booted
Yellow
IOS booted and running
Green
Not available
Off
Active (ACT)
Standby (indicates standby RSP)
Yellow
Active (indicates active RSP)
Green
No connection
Off
Management port (MGMT)
Connected with no activity
Green
Connected with activity
Flashing green
Cisco ASR 902 and ASR 902U Aggregation Services Router Hardware Installation Guide
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Troubleshooting
Fiber-Optic Specifications