[AusNOG] Airflow for Cisco switches in racks

[Joseph Goldman]

Certain cisco switch models (like the Nexus 2000 at a quick google, 
possibly others) offer to order them with reversed airflow for this 
reason I believe.

On 06/11/15 13:49, Radek Tkaczyk 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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