Cisco Systems 7500 Series manual Airflow

Chapter 2 Preparing for Installation

Environmental Monitoring and Reporting Overview for the Cisco 7500 Series

The current temperature measurements at the three RSP sensors are displayed as inlet, hotpoint, and exhaust. The shutdown temperature source is the hotpoint sensor, which is located toward the center of the RSP. System voltage measurements are also displayed, followed by the system current measurements and power supply wattage calculation.

Note The current monitor circuits of the 7513 power supply are only accurate at high power levels. They are there to prevent over-configuration and serve no purpose at low power levels. If the system is not operating above 70% power, the measurement results are not accurate. Above 70%, the measurements have the degree of accuracy needed to prevent the insertion of too many line cards into the system.

Following is sample output of the show env all command:

Router# show env all

Environmental Statistics

Environmental status as of Wed 5-10-1995 19:10:41

Data is 31 second(s) old, refresh in 29 second(s)

WARNING: Fan has reached CRITICAL level

Power Supply: 1200W AC

No Intermittent Powerfails

+12 volts measured at 12.00(V)

+5 volts measured at 5.02(V) -12 volts measured at -12.05(V) +24 volts measured at 23.70(V)

Airflow	temperature measured		at	35(C)
Inlet	temperature measured		at	26(C)
Arbiter type		1, backplane type	7513 (id 2)
Power supply		#1 is 1200W AC (id 1), power supply #2 is removed (id 7)
Active fault		conditions: Blower #3
Fan speed	is	50%
Active trip points: none
15 of 15 soft shutdowns remaining				before hard shutdown

Note When the system temperature increases above the board shutdown level, a soft shutdown occurs (that is, the processor modules are shut down, and the power supplies, fans, and CI continue to operate). When the system cools to the restart level, the system restarts. The system counts the number of times this occurs and keeps the up/down cycle from continuing endlessly. When the counter reaches zero, the system performs a hard shutdown, which requires a power cycle to recover. The soft shutdown counter is reset to its maximum value after the system has been up for 6 hours.

1

0123456789012

Dbus slots: XX XXXX XXXX

	inlet	hotpoint	exhaust
RSP(6)	24C/75F	35C/95F	29C/84F

Shutdown temperature source is 'hotpoint' slot6 (requested slot6)

		+12V	measured at	12.17
		+5V	measured at	5.19
		-12V	measured at	-12.26
		+24V	measured at	24.44
+2.5			reference is	2.49
		Cisco 7500 Series Installation and Configuration Guide
	2-34			OL-5008-03 B0