Environmental Monitoring - Cisco 7000 Series Hardware Installation And Maintenance Manual

Note
show environment all command will indicate the AC-input power supply as "850W." A DC-input
power supply will still be indicated as "600W."

Environmental Monitoring

The environmental monitoring functions use the following levels of status conditions to monitor the
system. The processor uses the first four levels to monitor the temperature inside the processor slots,
and the power supply uses the Normal and Critical levels to monitor DC voltages. Table 1-7 lists
temperature thresholds for the first four (processor-monitored) levels. Table 1-8 lists the DC power
thresholds for the Normal and Critical (power-supply-monitored) levels.
•
Normal—All monitored parameters are within normal tolerances. The fans operate at 55 percent
of their maximum speed as long as the internal air temperature does not exceed this level.
•
Warning—The system is approaching an out-of-tolerance condition. The system will continue to
operate, but operator monitoring or action is recommended to bring the system back to a normal
state. If the internal air temperature reaches 23°C (73°F), the fan speed will increase linearly from
55 percent of maximum speed until it reaches 100 percent speed at 33°C (91°F).
•
Critical—An out-of-tolerance temperature or voltage condition exists. The system may not
continue operation. If a voltage measurement reaches this level, the power supply can shut down
the system. If a fan in the fan array fails, the system will display a warning message and shut
down in two minutes. Immediate operator action is required.
•
Processor shutdown—The processor has detected a temperature or fan-failure condition that
could result in physical damage to system components and has disabled all DC power. Immediate
operator action is required. Before shutdown, the system logs the status of monitored parameters
in NVRAM so that you can retrieve it later to help determine the cause of the problem. The
system power remains off until the operator toggles the system power switch off and on again.
•
Power supply shutdown—The power supply has detected an out-of-tolerance voltage, current, or
temperature condition within the power supply and has shut down (or a shutdown is imminent).
All DC power remains disabled until the operator toggles the AC power and corrects the problem
that caused the shutdown (if any). This status condition is typically due to one of the following:
— Loss of AC power (the AC source failed).
— Power supply detected an overvoltage, overcurrent, AC undervoltage, or overtemperature
•
Fan failure — One or more of the fans has failed. This message is displayed for two minutes, after
which the system initiates a full processor shutdown.
Table 1-7
Parameter
Inlet air
Airflow
1. These thresholds were corrected in Software Releases 9.17(8) and 9.21(3); refer to the
description of the show environment table command in the next section, "Environmental
Reports."
If you are currently using software other than Maintenance Release 9.17(10) or later, then the
condition within the power supply (this includes operator shutdown by turning off the system
power switch, which the power supply interprets as an under-voltage condition).
Processor-Monitored Temperature Thresholds
Warning Normal
< 10°C 10–39°C
1
< 10°C 10–70°C
Warning Critical Shutdown
39–46°C 46–64°C > 64°C
70–77°C 77–88°C > 88°C
Functional Overview
Product Overview 1-41