Cisco 7200 VXR router User Manual page 63

If the air temperature exceeds a defined threshold, the system controller displays warning
messages on the console terminal, and if the temperature exceeds the shutdown threshold,
the system controller shuts down the system. The system stores the present parameter
measurements for both temperature and DC voltage in NVRAM so you can retrieve them
later as a report of the last shutdown parameters.
In addition, the power supplies monitor internal power supply temperature and voltages. A
power supply is either within tolerance (Normal) or out of tolerance (Critical). If an internal
power supply temperature or voltage reaches a critical level, the power supply shuts down
without any interaction with the system processor.
The environmental monitoring functions use the following levels of status conditions to
monitor the system:
•
Normal—All monitored parameters are within normal tolerances.
•
Warning—The system has exceeded a specified threshold. The system continues to
operate, but operator action is recommended to bring the system back to a normal state.
•
Critical—An out-of-tolerance temperature or voltage condition exists. The system
continues to operate; however, the system is approaching shutdown. Immediate operator
action is required.
•
Shutdown—The processor has detected a temperature condition that could result in
physical damage to system components and has disabled DC power to all internal
components. This condition requires immediate operator action. All DC power remains
disabled until you toggle the power switch. Before any shutdown, the system logs the
status of monitored parameters in NVRAM so you can retrieve it later to help determine
the cause of the problem.
•
Power supply shutdown—The power supply detected an internal out-of-tolerance
overvoltage, overcurrent, or temperature condition and shut itself down. All DC power
remains disabled until you toggle the power switch.
Table 1-12 lists the typical temperature thresholds for each network processing engine type,
and Table 1-13 lists the DC power thresholds for the normal, warning, and critical
(power supply-monitored) levels.
Environmental Monitoring and Reporting Functions
Cisco 7200 VXR Product Overview 1-53