I have a stack of cisco 3750 switch (c3750-48ps) which has 4 switches total. Out of 4 one of the switch is showing fan faulty and temperature faulty. I checked the switch and found out that the speed of the fan of that switch is higher than the speed of the fan of the other switches. How can i trouble shoot this or fix this?
Use the environment command as a starting point:
show env all
The first part of the output should be similar to:
FAN 1 is OK FAN 2 is OK FAN PS-1 is OK FAN PS-2 is OK SYSTEM TEMPERATURE is OK System Temperature Value: 29 Degree Celsius System Temperature State: GREEN Yellow Threshold : 46 Degree Celsius Red Threshold : 60 Degree Celsius
In this example both chassis fans and both power supply fans are reporting all's normal. The system temp is good and I have 17 degrees to go before I reach temp warning.
If one fan is hosed it is very likely that system temp increased and the remaining variable-speed fan has picked up the pace to keep the switch cool.