[AusNOG] Cooling Pads for Juniper SRX?

[Paul Jones]

I have some equipment inside a sealed enclosure, inside a yellow enclosure in full sun, with a half meter air gap between them, and it has still got up to 50 degC quite a few times in the last two weeks (Sydney). This equipment is basically just a monitoring device with 3G modem so creates negligible heat on its own.
If you have a router that creates a fair amount of heat I’d expect it to easily get to 70 deg without even trying. I monitored the surface temp a while back on our enclosures, just out of curiosity, and it never exceeded 72-76 deg, although it did get to 72 a few times when the ambient was only 33, which I found surprising.

Cheers,
Paul.

From: AusNOG [mailto:ausnog-bounces at lists.ausnog.net] On Behalf Of Skeeve Stevens
Sent: Tuesday, 2 December 2014 3:27 PM
To: ausnog at ausnog.net
Subject: [AusNOG] Cooling Pads for Juniper SRX?

Hi all,

I have an issue with some Juniper SRX100's overheating.  I've seen them get hot before, especially placed on something similar (i.e. another SRX100)... and given warnings of overheating, but never shut down.... but this situation is different.

These SRX100's are shutting down as they are reaching a core temperature of 70c as they are located in racks that are outside in the sun and on particularly hot days - around 32c-36c they overheat and turn themselves off.

Some might say this is understandable... and I sort of agree.  Although their operating system says they are good to 40c, that doesn't really seem to be the case.  The SRX110's are a little more tolerant given they are bigger units - but have the same operating environmentals (along with the EX2200-C).  But at the moment I have the SRX100's and would prefer not to swap them out as it will cost significantly.

Then one of my staff had (what I think) a good idea today... to use cooling pads... maybe like the ones you use for laptops or something.

So I am wondering if anyone has been some solid - not $20 junk or such.. but something that runs off mains, and works well 24x7x365 - maybe even something that only kicks in once a certain temperature has been reached.

I thought if anywhere, a couple of these mailing lists might have had some experience with these kinds of things - especially for those who have built regional pops and have had to cool some equipment.

Thanks all!

...Skeeve

Skeeve Stevens - eintellego Networks Pty Ltd
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