Environmental Monitoring And Reporting Functions - Cisco 7120 Series User Manual

Chapter 1 Overview
Table 1-16 Cisco 7100 Series System LED Descriptions (continued)
LED Label
PWR
SYS RDY
AC OK
DC OK
OTF

Environmental Monitoring and Reporting Functions

Environmental monitoring and reporting functions are controlled by the network processor and allow
you to maintain normal system operation by identifying and resolving adverse conditions that might
disrupt operation.
The environmental monitoring functions constantly monitor the internal chassis air temperature and
power supply voltages and currents. The power supply monitors its own voltage and temperature and
shuts itself down if it detects a critical condition within the power supply. The reporting functions
periodically log the values of measured parameters so that you can retrieve them for analysis later, and
the reporting functions display warnings on the console if any of the monitored parameters exceed
defined thresholds.
The front and back of the chassis must remain unobstructed to ensure adequate airflow and prevent
overheating inside the chassis; we recommend at least 3 inches (7.6 cm) of clearance. Temperature
sensors in the router monitor the internal air temperature and send warning messages when the internal
air temperature exceeds the specified threshold.
Environmental Monitoring
The environmental monitoring functions use four sensors to monitor the temperature of the cooling air
as it moves through the chassis.
If the air temperature exceeds a defined threshold, the router displays warning messages on the console
terminal. The system stores the present parameter measurements for both temperature and power voltage
in NVRAM so you can retrieve them later.
In addition, the power supply monitors the internal power supply temperature and voltages. A power
supply is either within tolerance (normal) or out of tolerance (critical). If the 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:
•
•
•
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Color State
Green On
Green On
Green On
Green On
Green On
Amber On
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, immediate operator action is required.
Function
Indicates that the power supply is delivering AC-input
power to the router.
Indicates the system is operational.
Indicates that AC input is within normal range.
Indicates that DC output is within normal range.
Indicates that internal temperatures are normal.
Indicates a power supply fan failure.
Cisco 7100 Series VPN Router Installation and Configuration Guide
Functional Overview
1-39