For optimum cooling, verify the condition of the CFEB.
user@host> show chassis cfebCFEB status: State Online Intake Temperature 27 degrees C / 80 degrees F Exhaust Temperature 33 degrees C / 91 degrees F CPU utilization 3 percent Interrupt utilization 0 percent Heap utilization 8 percent Buffer utilization 21 percent Total CPU DRAM 128 MB Internet Processor II Version 1, Foundry IBM, Part number 164 Start time: 2003-06-11 11:41:22 PDT Uptime: 1 hour, 39 minutes, 31 seconds
user@host> show chassis cfebCFEB—E status: State Online Intake Temperature 27 degrees C / 80 degrees F Exhaust Temperature 33 degrees C / 91 degrees F CPU utilization 3 percent Interrupt utilization 0 percent Heap utilization 8 percent Buffer utilization 21 percent Total CPU DRAM 128 MB Internet Processor II Version 1, Foundry IBM, Part number 164 Start time: 2003-06-11 11:41:22 PDT Uptime: 1 hour, 39 minutes, 31 seconds
For further description of the output from the command, see the Junos OS System Basics and Services Command Reference.