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Hardware Installation Guide for the Cisco 4000 Series Integrated Services Router
OL-32185-02
Chapter 1 Overview of Cisco 4000 Series ISRs
Hardware Features of Cisco 4000 Series ISRs
Table 1-4 LED Descriptions (Applies to the Cisco 4221 ISR Router)
PWR System Power Green System power is on and system functions correctly. Bezel side All models
Green
blinking
System power is in the process of shutting down.
Amber System power is up, but low level initialization has
failed.
Amber
blinking:
System power is up, but the system has failed to
come out of reset.
Off System power is off.
1. Management Ethernet Link on bezel side on Cisco 4331 ISR.
2. These LEDs are on the bezel side for Cisco 4331 ISR
LED Represents Color Description Location
Available
On
LED Represents Color Description Location
Available
On
STAT System Status Solid green System operates normally. Bezel side All models
Blinking
amber
BIOS/Rommon is booting.
Amber BIOS/Rommon has completed booting, and system
is at Rommon prompt or booting platform software.
Off System is not out of reset or BIOS image is not
loadable.
TEMP Temperature
Status
Solid green All temperature sensors in the system are within
acceptable range.
Bezel side All models
Amber One or more temperature sensors in the system are
outside the acceptable range.
Off Temperature is not being monitored.
FAN Fan Status Green All fans are operating. Bezel side All models
Amber One fan has stopped working.
Blinking
Amber
Two or more fans have stopped working, or the fan
tray is removed.
Off Fans are not being monitored.
L Ethernet ports 0
and 1
1
Green Ethernet cable is present and link is established with
other side.
I/O side All models
Off No link.
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