<div dir="ltr">I try to buy LX optics as much as possible so I don't have to worry about Single Mode or Multi-Mode... under a few hundred metres it's same same.</div><div class="gmail_extra"><br clear="all"><div><div dir="ltr">
<div><br>...Skeeve</div><div><br></div><div><div><b style="font-size:13px;font-family:Calibri">Skeeve Stevens - </b><span style="font-size:13px;font-family:Calibri">eintellego Networks Pty Ltd</span></div><div><div><span style="font-family:Calibri;font-size:13px"><a href="mailto:skeeve@eintellegonetworks.com" target="_blank">skeeve@eintellegonetworks.com</a> ; <a href="http://www.eintellegonetworks.com/" target="_blank">www.eintellegonetworks.com</a></span><font><p style="font-family:Calibri;font-size:13px;margin:0px">
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<br><br><div class="gmail_quote">On Sat, Oct 12, 2013 at 6:56 PM, Peter Tiggerdine <span dir="ltr"><<a href="mailto:ptiggerdine@gmail.com" target="_blank">ptiggerdine@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<p dir="ltr">SMF for carrier to rack but I don't see any problems with MMF inter rack. The delta between SFP cost is well worth it.</p>
<div class="gmail_quote">On 12/10/2013 5:51 PM, "James Braunegg" <<a href="mailto:james.braunegg@micron21.com" target="_blank">james.braunegg@micron21.com</a>> wrote:<br type="attribution"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
<div lang="EN-US" link="blue" vlink="purple" style="word-wrap:break-word"><div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Dear Alastair,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">I would recommend <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Single mode Fibre for any rack to rack communications , or rack to carrier communication . <u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Today the same single mode fibre will run 1gbit, 10gbit, 40gbit and 100gbit … and I’m sure it will run 400gbit in years to come and that’s before you look at wavelength technology.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">I also find fibre has an placebo effect on people thinking it’s more important than copper so they take more care when touching it….<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">I would only use copper for Switch to Server communication within a rack<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><u></u> <u></u></span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">Kindest Regards<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><u></u> <u></u></span></p><div><p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Verdana","sans-serif"">James Braunegg<br>
</span></b><b><span style="font-size:8.0pt;font-family:"Verdana","sans-serif"">P:</span></b><span style="font-size:8.0pt;font-family:"Verdana","sans-serif""> <a href="tel:1300%20769%20972" value="+611300769972" target="_blank">1300 769 972</a> | <b>M:</b> <a href="tel:0488%20997%20207" value="+61488997207" target="_blank">0488 997 207</a> | <b>D:</b> <a href="tel:%2803%29%209751%207616" value="+61397517616" target="_blank">(03) 9751 7616</a></span><span style="font-size:8.0pt;font-family:"Verdana","sans-serif""><u></u><u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:8.0pt;font-family:"Verdana","sans-serif"">E:</span></b><span style="font-size:8.0pt;font-family:"Verdana","sans-serif""> </span><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><a href="mailto:james.braunegg@micron21.com" target="_blank"><span style="font-size:8.0pt;font-family:"Verdana","sans-serif"">james.braunegg@micron21.com</span></a></span><span style="font-size:8.0pt;font-family:"Verdana","sans-serif""> | <b>ABN:</b> 12 109 977 666 <br>
<b>W:</b> <a href="http://www.ddosprotection.com.au" target="_blank"><span>www.ddosprotection.com.au</span></a> <b>T:</b> @micron21<u></u><u></u></span></p><p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Verdana","sans-serif""><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:8.0pt;font-family:"Verdana","sans-serif""><br><img border="0" width="250" height="39" src="cid:image001.jpg@01CEC77C.2E4578A0" alt="Description: Description: Description: Description: M21.jpg"><br>
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</div><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""><u></u> <u></u></span></p><div><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> AusNOG [mailto:<a href="mailto:ausnog-bounces@lists.ausnog.net" target="_blank">ausnog-bounces@lists.ausnog.net</a>] <b>On Behalf Of </b>Alastair Waddell<br>
<b>Sent:</b> Friday, October 11, 2013 9:13 PM<br><b>To:</b> <a href="mailto:ausnog@ausnog.net" target="_blank">ausnog@ausnog.net</a><br><b>Subject:</b> [AusNOG] Copper versus fibre in the DC<u></u><u></u></span></p></div>
</div><p class="MsoNormal"><u></u> <u></u></p><div><p class="MsoNormal">Hi AusNOG,<u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">I expect there's strong opinions about this.<u></u><u></u></p>
</div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">As I'm relocating DCs, its an opportunity to re-assess carrier interconnect terminations. <u></u><u></u></p></div><div><p class="MsoNormal">
<u></u> <u></u></p></div><div><p class="MsoNormal">I've been reading how copper (CAT7) is still valid with 10Gb/s ethernet and at the same time how the transceiver is a point of latency where the optics must be converted to electrical signal.<u></u><u></u></p>
</div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">I figure the transceiver is also a point of failure that's absent in copper although such an argument must surely factor the qualify of the cable/RJ and it's subsequent handling (but how hard can it be!)<u></u><u></u></p>
</div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">So: <u></u><u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">* Is copper a valid or even a 'better' choice to terminate carriers in the DC for 1Gb/s and beyond to 10Gb/s? *<u></u><u></u></p>
</div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal">PS KISS and risk mitigation rule in my little world. My fallback position is that fibre is still preferred as the 'safe' option especially wrt 10Gb/s. I just want to canvass all options. I don't want to repeat the exercise with the carriers at some future date if I can avoid it. It probably means, sub 1Gb/s top-of-rack kit today (looking at 4948/4900M or Juniper equivalents) and new kit at somewhere near 1Gb/s throughput with a preference to avoid carrier re-cabling. <u></u><u></u></p>
</div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#333333;background:white">"With the release of the IEEE 802.3an standard, 10 Gb/s over balanced twisted-pair cabling (10GBASE-T) is the fastest growing and is expected to be the most widely adopted 10GbE option. "</span><u></u><u></u></p>
</div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#333333;background:white">"At 1 Gb/s speeds, balanced twisted-pair compatible electronics offer better latency performance than fibre; however, considering latency at 10 Gb/s, currently fibre components perform better than balanced twisted-pair compatible 10GBASE-T electronics"</span><u></u><u></u></p>
</div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal"><span style="font-family:"Verdana","sans-serif";color:#333333;background:white">"Since optical fibre electronics cannot autonegotiate, a move from 1000BASE-xx to 10GBASE-xx requires a hardware change. In contrast, both 1GbE and 10GbE can be supported by 10GBASE-T balanced twisted-pair compatible equipment."</span><u></u><u></u></p>
</div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal"><a href="http://www.siemon.com/uk/white_papers/08-07-10-copper-fiber-options-data-center.asp" target="_blank">http://www.siemon.com/uk/white_papers/08-07-10-copper-fiber-options-data-center.asp</a><u></u><u></u></p>
</div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><p class="MsoNormal"><u></u> <u></u></p></div><div><div>
<div>
<p class="MsoNormal"><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif"">Regards,<u></u><u></u></span></p></div><div><p class="MsoNormal"><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif"">-- <u></u><u></u></span></p>
</div><div><p class="MsoNormal"><span style="font-size:13.5pt;font-family:"Helvetica","sans-serif"">Alastair Waddell<br>Legion Internet<br>Australia<u></u><u></u></span></p></div></div></div><p class="MsoNormal">
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