Environmental Reports - Cisco 7000 Series Hardware Installation And Maintenance Manual

Functional Overview
Table 1-8
Parameter
+5V
+12V
–12V
+24V
The system processor uses the first four status levels (Normal, Warning, Critical, and Processor
Shutdown) to monitor the air temperature in the interface processor compartment and the voltage
levels on the four DC lines. Sensors on the RP monitor the temperature of the cooling air that flows
through the processor slots.
If the air temperature exceeds a defined threshold, the system processor displays warning messages
on the console terminal and, if the temperature exceeds the shutdown threshold, it shuts down the
system. The system stores the present parameter measurements for both temperature and DC voltage
in NVRAM, so that you can retrieve it later as a report of the last shutdown parameters.
The power supply self-monitors its own internal temperature and voltages. The power supply is
either within tolerance (Normal) or out of tolerance (Critical level), as shown in Table 1-8. If an
internal power supply temperature or voltage reaches a critical level, the power supply shuts down
without any interaction with the system processor.
If the system detects that AC input power is dropping but it is able to recover before the power supply
shuts down, it logs the event as an intermittent powerfail. The reporting functions display the
cumulative number of intermittent powerfails logged since the last power up.

Environmental Reports

The system displays warning messages on the console if processor-monitored parameters exceed a
desired threshold or if a fan failure occurs. You can also retrieve and display environmental status
reports with the show environment, show environment all, show environment last and show
environment table commands. Parameters are measured and reporting functions are updated every
60 seconds. A brief description of each of these commands follows. For complete command
descriptions and instructions, refer to the related software documentation.
Caution
if the system is drawing in the exhaust air of other equipment. When viewing the chassis from the
interface processor end, the airflow inlet vents are on the right side of the chassis, and the exhaust
vents are on the left. (See Figure 1-6.) Ensure adequate clearance around the sides of the chassis so
that cooling air can flow through the chassis interior unimpeded. Obstructing or blocking the chassis
sides will restrict the airflow and can cause the internal chassis temperature to exceed acceptable
limits.
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Power-Supply Monitored Voltage Thresholds
Critical Normal
< 4.74V 4.74–5.26V
< 10.20V 10.20–13.8V
> –10.20V –10.20– –13.80V
< 20.00V 20.00–28.00V
Ensure that your system is drawing cool inlet air. Overtemperature conditions can occur
Critical
> 5.26V
> 13.80V
< –13.80V
> 28.00V