The Cisco 819
integrated services routers are equipped with sensors in the router body for
monitoring the environment temperature and logging the temperature every 30
seconds. There are four sensors located on the four corners of the router
chassis. There is an additional System Ambient sensor and a 3G sensor.
The corner sensors
display the following message:
- Error message on the
console—When the temperature ranges are outside the set temperature thresholds,
the monitor displays an error message. Different temperature ranges are set for
different SKUs of the router:
- Cisco 819G (non-hardened): 0
to 60 degrees celcius
- Cisco 819HG (hardened): –25 to 75
- SNMP Traps—syslog messages are
created when the temperature is outside the specified range.
- Server “call home”
feature—The server callhome feature is already enabled to call Cisco TAC in the
event of very high or low temperatures.
In addition to the
corner sensors, the System Ambient and 3G sensors also log the temperature
every 30 seconds onto bootflash memory.
Any time the
temperature is above the high threshold, or lower than the low threshold, the
temperature information will be saved in non-volatile memory region and is also
displayed as part of this output.
Use the show
environment command to check the temperature of the router. You can also use
this command to display the power usage and the power consumption of the unit
at the end.
The following is a
sample output for the show environment command:
router# show environment
Board Power consumption is: 4.851 W
Power Supply Loss: 1.149 W
Total System Power consumption is: 6.000 W
REAL TIME CLOCK BATTERY STATUS
Battery OK (checked at power up)
Sensor Current High/Low
Name Temperature Status Threshold
--------------------- -------------- -------------- ---------
Sensor 1 36 Normal 60/0
Sensor 2 34 Normal 60/0
Sensor 3 40 Normal 60/0
Sensor 4 38 Normal 60/0
System Ambient Sensor 35 Normal 60/0
3G Modem Sensor 33 Normal 85/0
Environmental information last updated 00:00:26 ago
If the modem
temperature goes up to 85 degrees for non-hardened or 90 degrees for hardened
version, a warning message appears. The router automatically shuts down if the
temperature goes higher than 108 degrees.