Cisco ASR 901S Series Troubleshooting page 4

Reading LEDs
Reading LEDs
The following table summarizes the LEDs on the chassis of the router. These LEDs are common to all chassis
models, however, these LEDs may be turned off using Cisco IOS CLIs. By default all three LEDs are enabled.
LED Label
1
2
3
Cisco ASR 901S Series Aggregation Services Router Hardware Installation Guide
4
Function Color/State
System status Off
Green
Amber
Red
Management status Off
Green
Amber
Red
Network status Off
Green
Amber
Red
Troubleshooting
Description
System is in ROM Monitor
(ROMMON) mode
No hardware failure detected;
system is in Cisco IOS prompt
mode
Minor hardware failure
detected
Major hardware failure (critical
temperature or voltage)
detected
No power
System booted fine and is in
Cisco IOS prompt mode
Software upgrade is in progress
(MCU or ROMMON)
Cisco IOS boot in progress or
in ROMMON mode
Fast Ethernet port and slot not
connected
Fast Ethernet port and
slot—link and line protocol is
up.
Fast Ethernet port and
slot—administration is down
Fast Ethernet port and
slot—line protocol is down
OL-29732-02