<div dir="ltr"><div><div>Sure, but when one observes the default vendor position is front to back airflow, if one then applies logic, you can conclude back to front is deployed as a cost cutting measure sans structured cabling.<br><br></div>Kind regards<br><br></div>Paul Wilkins<br></div><div class="gmail_extra"><br><div class="gmail_quote">On 4 October 2017 at 16:10, Jay Dixon <span dir="ltr"><<a href="mailto:jaybobo@gmail.com" target="_blank">jaybobo@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">I think Sam's point was that the original email/question was asking purely about direction front or back, not whether you use TOR switches or structured cabling back to a central point :)</div><div class="gmail_extra"><br><div class="gmail_quote"><div><div class="h5">On Wed, Oct 4, 2017 at 4:06 PM, Paul Wilkins <span dir="ltr"><<a href="mailto:paulwilkins369@gmail.com" target="_blank">paulwilkins369@gmail.com</a>></span> wrote:<br></div></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div><div class="h5"><div dir="ltr"><div><div><div><div>Sam,<br></div>In an SP environment, you may well have whole rows dedicated to a single service - email, or web say. In the rack itself, you'll have web_node_5007, web_node_5008 etc.<br><br></div>In the enterprise, you'll have a few email blades, internal web, external web, next to a bunch of file and print etc etc etc. These then likely are all on different firewall interfaces/firewalls in different zones requiring different routing and security.<br><br></div>Kind regards<span class="m_-3179778364173912221HOEnZb"><font color="#888888"><br><br></font></span></div><span class="m_-3179778364173912221HOEnZb"><font color="#888888">Paul Wilkins<br></font></span></div><div class="m_-3179778364173912221HOEnZb"><div class="m_-3179778364173912221h5"><div class="gmail_extra"><br><div class="gmail_quote">On 4 October 2017 at 15:41, Sam Silvester <span dir="ltr"><<a href="mailto:sam.silvester@gmail.com" target="_blank">sam.silvester@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><span>On Wed, Oct 4, 2017 at 2:38 PM, Paul Wilkins <span dir="ltr"><<a href="mailto:paulwilkins369@gmail.com" target="_blank">paulwilkins369@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div><div>Because SPs have the luxury to not use structured cabling, due to scale where all switch ports share a common configuration, so there's no need for a patch panel, just patch direct to the switch, whereas in enterprise, inadvertent swapping of ports leads to P1s, hence, structured cabling is fairly ubiquitous.<br><br></div></div></div></blockquote><div><br></div></span><div>I'm not sure I understand.<br><br>We're talking about "ToR" switching in this thread i.e. switches share a rack with the servers in question.<br><br>In both front and rear mounted switches, I'd assume all cables go direct from the server to the switch. If that's not what you mean, can you perhaps share what kind of cabling arrangement you've come across? I'd be interested in how it would work and what logic would go into such a decision.</div></div><br>I'm also not sure how such a distinction between enterprise and SP would change anything. SPs would still have a mapping of server to port, it's not like just any server / cable goes into any old port and swapping them to a new/different arrangement during a switch change wouldn't matter...or am I making an incorrect assumption there?</div><div class="gmail_extra"><br></div><div class="gmail_extra">Cheers,</div><div class="gmail_extra"><br></div><div class="gmail_extra">Sam</div><div class="gmail_extra"><br></div><div class="gmail_extra"><br></div></div>
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