<html>
<head>
<meta content="text/html; charset=windows-1252"
http-equiv="Content-Type">
</head>
<body text="#000000" bgcolor="#FFFFFF">
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.<br>
<br>
<div class="moz-cite-prefix">On 06/11/15 13:49, Radek Tkaczyk wrote:<br>
</div>
<blockquote
cite="mid:a2169063087e45de85b09e15f3a15507@vm01.dc01.exchangevault.com.au"
type="cite">
<meta http-equiv="Content-Type" content="text/html;
charset=windows-1252">
<meta name="Generator" content="Microsoft Word 15 (filtered
medium)">
<style><!--
/* Font Definitions */
@font-face
{font-family:"Cambria Math";
panose-1:2 4 5 3 5 4 6 3 2 4;}
@font-face
{font-family:Calibri;
panose-1:2 15 5 2 2 2 4 3 2 4;}
/* Style Definitions */
p.MsoNormal, li.MsoNormal, div.MsoNormal
{margin:0cm;
margin-bottom:.0001pt;
font-size:11.0pt;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
a:link, span.MsoHyperlink
{mso-style-priority:99;
color:#0563C1;
text-decoration:underline;}
a:visited, span.MsoHyperlinkFollowed
{mso-style-priority:99;
color:#954F72;
text-decoration:underline;}
span.EmailStyle17
{mso-style-type:personal-compose;
font-family:"Calibri",sans-serif;
color:windowtext;
font-weight:normal;
font-style:normal;}
.MsoChpDefault
{mso-style-type:export-only;
font-family:"Calibri",sans-serif;
mso-fareast-language:EN-US;}
@page WordSection1
{size:612.0pt 792.0pt;
margin:72.0pt 72.0pt 72.0pt 72.0pt;}
div.WordSection1
{page:WordSection1;}
--></style><!--[if gte mso 9]><xml>
<o:shapedefaults v:ext="edit" spidmax="1026" />
</xml><![endif]--><!--[if gte mso 9]><xml>
<o:shapelayout v:ext="edit">
<o:idmap v:ext="edit" data="1" />
</o:shapelayout></xml><![endif]-->
<div class="WordSection1">
<p class="MsoNormal">Hi Guys,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">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.
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">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.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">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!<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-AU">Regards,<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-AU"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-AU">Radek
Tkaczyk<o:p></o:p></span></p>
<p class="MsoNormal"><span style="mso-fareast-language:EN-AU">Ph:
0413 383 231<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<br>
<fieldset class="mimeAttachmentHeader"></fieldset>
<br>
<pre wrap="">_______________________________________________
AusNOG mailing list
<a class="moz-txt-link-abbreviated" href="mailto:AusNOG@lists.ausnog.net">AusNOG@lists.ausnog.net</a>
<a class="moz-txt-link-freetext" href="http://lists.ausnog.net/mailman/listinfo/ausnog">http://lists.ausnog.net/mailman/listinfo/ausnog</a>
</pre>
</blockquote>
<br>
</body>
</html>