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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
LED Indicators
summarizes the LED indicators that are located in the router bezel or chassis, but not on the
interface cards and modules.
Note
For module LEDs, please refer to the respective module installation guides for each module.
1
Table 1-1
LED Descriptions (Applies to Cisco 4461 ISR, Cisco 4451-X ISR, Cisco 4431 ISR, and Cisco 4351 ISR)
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 has been removed.
Off
Fans are not being monitored.
L
(left)
Ethernet
ports 0 and 1
Link
Green
Ethernet cable is present and link is established with
other side or PoE power is enabled for this port.
I/O side
All models
Off
No link.
S
(left)
Speed of
Ethernet
ports 0 and 1
Green
Blinking
Blink frequency indicates port speed:
•
1 blink+ pause - FE or GE port operating at 10
Mb/s
•
2 pause - FE or GE port operating
at100 Mb/s
•
3 pause - GE port operating at1000
Mb/s
I/O side
All models
Off
No link or a non-Ethernet 802.3af/t capable device
is plugged in and powered over the PoE.