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Zlatko
Posts: 24
Registered: ‎11-26-2009
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Throttling Fan Speed (Or Turn Off Completely)

Hello. I hope that this message will get some attention from the experts on this forum.

 

I am looking for a way to throttle or fully turn off the fan on an EX chassis via the JUNOS CLI or the Shell (whichever).

 

Does anyone know how this can be accomplished or at least point me in the right direction?

Trusted Expert
Automate
Posts: 784
Registered: ‎11-01-2007
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Re: Throttling Fan Speed (Or Turn Off Completely)

The systems are designed to provide adequate cooling in datacenter environments. If you turn off or otherwise interfere with the fan speed, they are very likely to overheat. I assume this is for noise? The EX2200 is designed more for acccess and oher environments requiring a quieter unit.

 

HTH,

 

-Keith

Contributor
Zlatko
Posts: 24
Registered: ‎11-26-2009
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Re: Throttling Fan Speed (Or Turn Off Completely)

Hi Keith.

 

Thanks for your reply sir.

 

It's actually nothing to do with the noise of the fan (although I realize the most complaints eminate from that aspect).

 

I'm more concerned as the unit is in an enclosure which is below 0 Celsius (Often -5 to -10), the fan often times making the situation even worse by cooling the unit unecessarily.

 

Other than pulling out the fan and having to visit every unit on site, I'd like to push a command to one or two of the routers to disable the unit.

Distinguished Expert
aarseniev
Posts: 1,725
Registered: ‎08-21-2009
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Re: Throttling Fan Speed (Or Turn Off Completely)

[ Edited ]

Hello there,

Every EX model has own operating temperature and storage temperature

EX4200

 

Environmental Ranges
• Operating temperature: 32° to 113° F (0° to 45° C)
• Storage temperature: -40° to 158° F (-40° to 70° C)

 

 

http://www.juniper.net/us/en/local/pdf/datasheets/1000215-en.pdf page 6

 

EX2200

 

 

Environmental Ranges
• Operating temperature: 32° to 113° F (0° to 45° C)
• Storage temperature: -40° to 158° F (-40° to 70° C)

 

http://www.juniper.net/us/en/local/pdf/datasheets/1000307-en.pdf page 4

 

EX4500

 

 

Environmental Ranges
• Operating temperature: 32° to 113° F (0° to 45° C)
• Storage temperature: -40° to 158° F (-40° to 70° C)

 

 

http://www.juniper.net/us/en/local/pdf/datasheets/1000322-en.pdf page 7

 

and so on

 

If you operate the EX switch outside these ranges you are risking your warranty.

HTH

Rgds

Alex

 

 

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Contributor
Zlatko
Posts: 24
Registered: ‎11-26-2009
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Re: Throttling Fan Speed (Or Turn Off Completely)

Hello aarseniev, I'm aware of the operating temperatures of the EX3200, however even with your specs, they do not match up with what I pulled from Juniper's website.

 

I found 0 to 55 C for the EX3200.

 

Either way, warranty aside, has this ever been done and is it possible? That is my concern.

 

Thanks.

Distinguished Expert
aarseniev
Posts: 1,725
Registered: ‎08-21-2009
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Re: Throttling Fan Speed (Or Turn Off Completely)

Here is the latest publicly available datasheet for EX3200

http://www.juniper.net/us/en/local/pdf/datasheets/1000216-en.pdf

Page 5

 

 

Environmental Ranges
• Operating temperature: 32° to 113° F (0° to 45° C)
• Storage temperature: -40° to 158° F (-40° to 70° C)

 

 

If you have been promised 0 to 55C then you have been lied to.

HTH

Rgds

Alex

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