Cisco Systems manual Cisco 7500 Series Temperature and Voltage Thresholds

Chapter 2 Preparing for Installation

Environmental Monitoring and Reporting Overview for the Cisco 7500 Series

temperature of the system falls below a certain temperature setpoint. At the fifteenth temperature cycle, this temperature setpoint is changed to a very low value, preventing the affected router from powering back up.

This achieves a hard shutdown of one router without affecting the other router. The RSP and IPs will remain disabled until the power is manually recycled. This allows you to choose a suitable time to recycle the power when it will not adversely affect your users.

In the Cisco 7507, Cisco 7507-MX, Cisco 7513, Cisco 7513-MX, and Cisco 7576, a blower failure is indicated when the blower impeller has stopped turning. A warning message is displayed on the console, and the system will continue operating until it shuts itself down because of overheating, or until you shut it down.

Cisco 7500 Series Temperature and Voltage Thresholds

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 them later as a report of the last shutdown parameters.

The power supplies monitor internal power supply temperature and voltages. A power supply is either within tolerance (Normal) or out of tolerance (Critical or Warning levels). 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 or DC input power is dropping, but it is able to recover before the power supply shuts down, it logs the event as an intermittent power failure. The reporting functions display the cumulative number of intermittent power failures logged since the last power up.

The following sections include the temperature and voltage threshold specifications for the Cisco 7500 series routers:

•Cisco 7505 Temperature and Voltage Thresholds, page 2-24

•Cisco 7507 and Cisco 7507-MX Temperature and Voltage Thresholds, page 2-25

•Cisco 7513, Cisco 7513-MX, and Cisco 7576 Temperature and Voltage Thresholds, page 2-25

Note For additional environmental temperature and airflow guidelines, see the “Site Environment, Chassis Temperature, and Airflow Guidelines” section on page 2-12.

Cisco 7505 Temperature and Voltage Thresholds

Table 2-2lists temperature thresholds for the first four processor-monitored levels. (The system displays all temperatures in Celsius only.) Table 2-3lists the DC power thresholds for the Normal and Critical power supply-monitored levels.

	Cisco 7500 Series Installation and Configuration Guide
2-24	OL-5008-03 B0