Cisco 7206VXR Configuration Guide - Page 77

Chapter 1 Cisco 7200 VXR Product Overview Functional Overview Environmental Monitoring and Reporting Functions Environmental monitoring and reporting functions are controlled by the network processing engine or network services engine and allow you to maintain normal system operation by identifying and resolving adverse conditions prior to loss of operation. The environmental monitoring functions constantly monitor the internal chassis air temperature and DC supply voltages and currents. Each power supply monitors its own voltage and temperature and shuts itself down if it detects a critical condition within the power supply. If conditions reach shutdown, the system shuts down to avoid equipment damage from excessive heat. 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. Environmental Monitoring The environmental monitoring functions use four sensors, two on the network processing engine or network services engine and two on the I/O controller, to monitor the temperature of the cooling air as it moves through the chassis. 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 temperatures 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 1-34 lists the typical temperature thresholds for the NPE-G2. Table 1-35 lists the typical temperature thresholds for the NPE-G1. Table 1-36 lists the typical temperature thresholds for earlier network processing engines or network services engines, Table 1-37 lists the DC power thresholds for the normal, warning, and critical (power supply-monitored) levels for most Cisco IOS releases, and Table 1-38 lists the DC power thresholds for the normal and critical (power supply-monitored) levels for Cisco IOS Release 12.0(23) and later releases of Cisco IOS Release 12.0. OL-5013-09 Cisco 7200 VXR Installation and Configuration Guide 1-59