[AusNOG] Airflow for Cisco switches in racks

[Tom Storey]

Pop the cover off and turn the fans around? :)

On 9 November 2015 at 07:09, Shane Short <shane at short.id.au> wrote:
> Another useful article covering this as well:
> http://www.pinebreeze.com/resource_images/dont-bake-network-switches.pdf
>
>
> Shane Short wrote:
>
> Panduit do make some doodads for this which was originally designed for the
> Catalyst 49XX series:
> http://www.panduit.com/wcs/Satellite?c=Page&childpagename=Panduit_Global%2FPG_Layout&cid=1345564328963&packedargs=classification_id%3D1862584%26locale%3Den_us&pagename=PG_Wrapper
>
> I like the integrated cable management.. because we all put cable management
> with our switches, right? RIGHT? good!
>
> Hayden Flack wrote:
>
> Hi Radek,
>
> Have you thought about designing a vent solution that sucks the hot air and
> tunnels it to the desired location?
>
> It wouldn't need to be a perfect fit, a vacuum type tubing that could suck
> the hot air and release it away from the cold isle containment.
>
> Regards
> Hayden
>
> On 6 November 2015 at 12:49, Radek Tkaczyk <radek at tkaczyk.id.au> wrote:
>>
>> Hi Guys,
>>
>>
>>
>> We always mount our network switches in our racks with the switches facing
>> the rear, so that when you cable up servers, you don’t have a mess of
>> network cabling going from the front of the rack to the back of the rack.
>> This has worked well for us for the last 10 years or so, but recently with
>> providers like NextDC doing cold isle containment, this means that switches
>> are blowing hot air into the cold aisle, and some people get unhappy with
>> this.
>>
>>
>>
>> We use Cisco 3750 switches which are 1RU, and they blow hot air out the
>> back of the switches, some models have side-to-back airflow, but it still
>> results in hot air being sent into the cold aisle. I have always thought
>> that this amount of hot air was negligible, and wouldn’t even matter in the
>> overall scheme of things, as long as your servers were mounted around the
>> right way.
>>
>>
>>
>> How are other people handling this situation? I’m not really keen on
>> changing our rack standards and having to re-do the entire cabling for racks
>> across the 4 of our data centres that are using cold isle containment!
>>
>>
>>
>> Regards,
>>
>>
>>
>> Radek Tkaczyk
>>
>> Ph: 0413 383 231
>>
>>
>>
>>
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>>
>
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