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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 1-2
LED Descriptions (Applies to the Cisco 4331 ISR and the Cisco 4321 ISR Routers)
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.
S
Speed of Ethernet
ports 0 and 1
Green
Blinking
Blink frequency indicates port speed:
•
1 blink - 10-Mbps link speed
•
2 blinks - 100-Mbps link speed
•
3 blinks - 1000-Mbps link speed
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.
SFP EN
Port 0, and 1 (for
Cisco 4331 ISR),
and Port 0 for
Cisco 4321 ISR)
Enable
Green
SFP module is detected and recognized.
I/O side
All models
Amber
Initialized with error.
Off
Not present.
SFP S
Status of port 0,
and 1 (for
Cisco 4331 ISR),
and Port 0 for
Cisco 4321 ISR)
Green
SFP module is detected and recognized.
I/O side
All models
Amber
Initialized with error.
Off
Not present.
Off
Not present.
SER CON
(right)
Serial Console
Active
Green
Active console port is RJ-45.
Note
When this LED is on, the USB CON LED
will be off.
I/O side
All models