Switching

Hello,

Some of my ex4200's have a fan spinning at full speed message. Its happing on different switches and not all fans on the switches. Is this a bad thing?

Could it be a false positive created by the version i'm running?....11.4R2.14.

The switches are in controlled enviromnets ie: airconditioning so the racks aren't experiencing high temperates.

Thanks for your help.

Usually fan speed should be normal. high speed means temp problem. Try to put your hand on the switch it self and check it is normal or not maybe it is spacing problem prevent air inside the rack

> show chassis environment
Class Item                           Status     Measurement
Power FPC 0 Power Supply 0           OK        
      FPC 0 Power Supply 1           OK        
      FPC 0 Power Supply 2           Absent    
      FPC 0 Power Supply 3           Absent    
      FPC 0 Power Supply 4           Absent    
Temp  FPC 0 CPU                      OK         36 degrees C / 96 degrees F
      FPC 0 EX-PFE1                  OK         42 degrees C / 107 degrees F
      FPC 0 EX-PFE2                  OK         45 degrees C / 113 degrees F
      FPC 0 Uplink Conn              OK         31 degrees C / 87 degrees F
      FPC 0 SFP#1                    OK         29 degrees C / 84 degrees F
      FPC 0 SFP#12                   OK         33 degrees C / 91 degrees F
Fans  FPC 0 Fan 1                    OK         Spinning at normal speed
      FPC 0 Fan 2                    OK         Spinning at normal speed
      FPC 0 Fan 3                    OK         Spinning at normal speed

I have the same problem,but we've had changes in our physical environment. The servers, switches, and our desks were originally in one room with a Mr. Slim A/C on the desk side of the room and the stack of EX4200s and EX4500s usually kept quiet, but would rev up every now and then on warmer days. Then we virtualized; added a large SAN and blade servers, divided the room in half with a wall, and added a large Liebert A/C that maintains 70*F in the room with excellent circulation. But, due to lack of planning , we had to orient the SAN and blades so they were blowing hot air in to the switches, and logically the fans started running at full speed.

Now we've rearranged everything and there is no hot air blowing in the switches, but fan #1 in each of the 4200s (units 0-3) continues to run at full speed. I don't get it....

We're running 12.3R9-S1

Here's the data:

Class Item                           Status     Measurement
Power FPC 0 Power Supply 0           OK
      FPC 0 Power Supply 1           Absent
      FPC 1 Power Supply 0           OK
      FPC 1 Power Supply 1           Absent
      FPC 2 Power Supply 0           OK
      FPC 2 Power Supply 1           Absent
      FPC 3 Power Supply 0           OK
      FPC 3 Power Supply 1           Absent
      FPC 4 Power Supply 0           OK
      FPC 4 Power Supply 0 Airflow   OK         Front to back
      FPC 4 Power Supply 1           OK
      FPC 4 Power Supply 1 Airflow   OK         Front to back
      FPC 5 Power Supply 0           OK
      FPC 5 Power Supply 0 Airflow   OK         Front to back
      FPC 5 Power Supply 1           OK
      FPC 5 Power Supply 1 Airflow   OK         Front to back
Temp  FPC 0 CPU                      OK         30 degrees C / 86 degrees F
      FPC 0 EX-PFE1                  OK         43 degrees C / 109 degrees F
      FPC 0 EX-PFE2                  OK         59 degrees C / 138 degrees F
      FPC 0 EX-PFE3                  OK         42 degrees C / 107 degrees F
      FPC 0 GEPHY Front Left         OK         28 degrees C / 82 degrees F
      FPC 0 GEPHY Front Middle       OK         33 degrees C / 91 degrees F
      FPC 0 GEPHY Front Right        OK         32 degrees C / 89 degrees F
      FPC 0 Uplink Conn              OK         29 degrees C / 84 degrees F
      FPC 1 CPU                      OK         27 degrees C / 80 degrees F
      FPC 1 EX-PFE1                  OK         41 degrees C / 105 degrees F
      FPC 1 EX-PFE2                  OK         56 degrees C / 132 degrees F
      FPC 1 EX-PFE3                  OK         42 degrees C / 107 degrees F
      FPC 1 GEPHY Front Left         OK         31 degrees C / 87 degrees F
      FPC 1 GEPHY Front Middle       OK         40 degrees C / 104 degrees F
      FPC 1 GEPHY Front Right        OK         36 degrees C / 96 degrees F
      FPC 1 Uplink Conn              OK         32 degrees C / 89 degrees F
      FPC 2 CPU                      OK         32 degrees C / 89 degrees F
      FPC 2 EX-PFE1                  OK         42 degrees C / 107 degrees F
      FPC 2 EX-PFE2                  OK         60 degrees C / 140 degrees F
      FPC 2 EX-PFE3                  OK         45 degrees C / 113 degrees F
      FPC 2 GEPHY Front Left         OK         30 degrees C / 86 degrees F
      FPC 2 GEPHY Front Middle       OK         35 degrees C / 95 degrees F
      FPC 2 GEPHY Front Right        OK         29 degrees C / 84 degrees F
      FPC 2 Uplink Conn              OK         30 degrees C / 86 degrees F
      FPC 3 CPU                      OK         35 degrees C / 95 degrees F
      FPC 3 EX-PFE1                  OK         46 degrees C / 114 degrees F
      FPC 3 EX-PFE2                  OK         57 degrees C / 134 degrees F
      FPC 3 EX-PFE3                  OK         45 degrees C / 113 degrees F
      FPC 3 GEPHY Front Left         OK         24 degrees C / 75 degrees F
      FPC 3 GEPHY Front Middle       OK         28 degrees C / 82 degrees F
      FPC 3 GEPHY Front Right        OK         30 degrees C / 86 degrees F
      FPC 3 Uplink Conn              OK         30 degrees C / 86 degrees F
      FPC 4 Rear Left PCB            OK         42 degrees C / 107 degrees F
      FPC 4 Rear Middle PCB          OK         48 degrees C / 118 degrees F
      FPC 4 Rear Right PCB           OK         48 degrees C / 118 degrees F
      FPC 4 PHY0                     OK         30 degrees C / 86 degrees F
      FPC 4 PHY6                     OK         32 degrees C / 89 degrees F
      FPC 4 PHY12                    OK         31 degrees C / 87 degrees F
      FPC 4 PHY19                    OK         30 degrees C / 86 degrees F
      FPC 5 Rear Left PCB            OK         43 degrees C / 109 degrees F
      FPC 5 Rear Middle PCB          OK         46 degrees C / 114 degrees F
      FPC 5 Rear Right PCB           OK         46 degrees C / 114 degrees F
      FPC 5 PHY0                     OK         31 degrees C / 87 degrees F
      FPC 5 PHY6                     OK         32 degrees C / 89 degrees F
      FPC 5 PHY12                    OK         31 degrees C / 87 degrees F
      FPC 5 PHY19                    OK         32 degrees C / 89 degrees F
Fans  FPC 0 Fan 1                    OK         Spinning at full speed
      FPC 0 Fan 2                    OK         Spinning at normal speed
      FPC 0 Fan 3                    OK         Spinning at normal speed
      FPC 1 Fan 1                    OK         Spinning at full speed
      FPC 1 Fan 2                    OK         Spinning at normal speed
      FPC 1 Fan 3                    OK         Spinning at normal speed
      FPC 2 Fan 1                    OK         Spinning at full speed
      FPC 2 Fan 2                    OK         Spinning at normal speed
      FPC 2 Fan 3                    OK         Spinning at normal speed
      FPC 3 Fan 1                    OK         Spinning at full speed
      FPC 3 Fan 2                    OK         Spinning at normal speed
      FPC 3 Fan 3                    OK         Spinning at normal speed
      FPC 4 Fan 1                    OK         Spinning at normal speed
      FPC 4 Fan 2                    OK         Spinning at normal speed
      FPC 4 Fan 3                    OK         Spinning at normal speed
      FPC 4 Fan 4                    OK         Spinning at normal speed
      FPC 4 Fan 5                    OK         Spinning at normal speed
      FPC 4 Fan-Tray Airflow         OK         Front to back
      FPC 5 Fan 1                    OK         Spinning at normal speed
      FPC 5 Fan 2                    OK         Spinning at normal speed
      FPC 5 Fan 3                    OK         Spinning at normal speed
      FPC 5 Fan 4                    OK         Spinning at normal speed
      FPC 5 Fan 5                    OK         Spinning at normal speed
      FPC 5 Fan-Tray Airflow         OK         Front to back

It looks like some of those temperatures are hitting or near the full-speed threshold. This appears to be 60C on EX4200's - though I only have those running on 12.1+ code it may be different on your version. show chassis temperature-thresholds should be able to tell you.

name@switch> show chassis temperature-thresholds 
                           Fan speed      Yellow alarm      Red alarm      Fire Shutdown
                          (degrees C)      (degrees C)     (degrees C)      (degrees C)
Item                     Normal  High   Normal  Bad fan   Normal  Bad fan     Normal
FPC 0 CPU                    60    70       80       70       95       85
FPC 0 EX-PFE1                60    70       80       70       95       85
FPC 0 EX-PFE2                60    70       80       70       95       85
FPC 0 EX-PFE3                60    70       80       70       95       85
FPC 0 GEPHY Front Left       60    70       80       70       95       85
FPC 0 GEPHY Front Middle     60    70       80       70       95       85
FPC 0 GEPHY Front Right      60    70       80       70       95       85
FPC 0 Uplink Conn            60    70       80       70       95       85
FPC 1 CPU                    60    70       80       70       95       85
FPC 1 EX-PFE1                60    70       80       70       95       85
FPC 1 EX-PFE2                60    70       80       70       95       85
FPC 1 EX-PFE3                60    70       80       70       95       85
FPC 1 GEPHY Front Left       60    70       80       70       95       85
FPC 1 GEPHY Front Middle     60    70       80       70       95       85
FPC 1 GEPHY Front Right      60    70       80       70       95       85
FPC 1 Uplink Conn            60    70       80       70       95       85

Hi,

Where do you see those messages of fan speed ?

Can you post the output of the "show log messages" ?