[AusNOG] Airflow for Cisco switches in racks

[Robert Hudson]

I just buy Brocade VDX switches instead, and specify port-exhaust airflow -
they ship with PSUs and fan units that work in the required direction.

Cheaper than Cisco too. :)
On 6 Nov 2015 1:53 pm, "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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