<html><head></head><body bgcolor="#FFFFFF"><div>Or loop back toward switch at each patch point to see if link goes up.<br><br><br></div><div><br>On 20/04/2012, at 3:45 PM, "Darren Ward (darrward)" <<a href="mailto:darrward@cisco.com">darrward@cisco.com</a>> wrote:<br>
<br></div><div></div><blockquote type="cite"><div><div>Can you test by moving the switch or another switch closer? </div><div><br></div><div>Test hop by hop in case of bad patch/connector?<br><br>Sent from my iPhone</div>
<div><br>On 20/04/2012, at 2:30 PM, "Qui Le" <<a href="mailto:QLe@sydneyoperahouse.com">QLe@sydneyoperahouse.com</a>> wrote:<br><br></div><div></div><blockquote type="cite"><div><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="Generator" content="Microsoft Word 12 (filtered medium)"><style><!--
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--></style><div class="WordSection1"><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">We use Mode Conditioning Cables at both end so it should work with our </span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">WS-G5484 transceiver 1000BASE-LX/LH long haul GBIC (singlemode or multimode) OM1 Fibre run according to Cisco.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">I can see port at the Core is up but no joy at the Access switch.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">As suggested , we may need a OTDR test done on the run.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Thank you all for your advises.</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Qui</span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"> </span></p><div style="border:none;border-top:solid #b5c4df 1.0pt;padding:3.0pt 0cm 0cm 0cm"><p class="MsoNormal">
<b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif"">From:</span></b><span lang="EN-US" style="font-size:10.0pt;font-family:"Tahoma","sans-serif""> Martin Visser [mailto:<a href="mailto:martinvisser99@gmail.com">martinvisser99@gmail.com</a>] <br>
<b>Sent:</b> Friday, 20 April 2012 13:16<br><b>To:</b> Qui Le<br><b>Cc:</b> <a href="mailto:ausnog@lists.ausnog.net">ausnog@lists.ausnog.net</a><br><b>Subject:</b> Re: [AusNOG] Fiber connectivity</span></p></div><p class="MsoNormal">
</p><div><p class="MsoNormal">Qui,</p></div><div><p class="MsoNormal"> </p></div><div><p class="MsoNormal">It might work, but you definitely need the Mode Conditioning Cable (to make sure the single mode optics in the transceiver launch down the side of the multi mode core). But you are right on the limit for a single fibre run. Each patch will add loss - and with six it all adds up. Unfortunately most enterprise network equipment is pretty much go or no-go as far as determining whether it works. You probably either need a OTDR test done on the run, or run things and 100BaseFX.</p>
</div><p class="MsoNormal" style="margin-bottom:12.0pt"><br clear="all">Regards, Martin<br><br><a href="mailto:MartinVisser99@gmail.com">MartinVisser99@gmail.com</a><br><br></p><div><p class="MsoNormal">On 20 April 2012 10:44, Qui Le <<a href="mailto:QLe@sydneyoperahouse.com">QLe@sydneyoperahouse.com</a>> wrote:</p>
<div><div><p class="MsoNormal" style>We run 550m of OM1 fibre from our Cisco core to a remote site over 6 hops included rack to rack and we can not</p><p class="MsoNormal" style>seem to get any connectivity. Using both Cisco GLC-LH-SM transceivers at both the Core & access Switch.</p>
<p class="MsoNormal" style> </p><p class="MsoNormal" style>Does anyone know if there are hops limitations for long haul fibres.</p><p class="MsoNormal" style> </p><p class="MsoNormal" style>Any advise is much appreciated.</p>
<p class="MsoNormal" style> </p><p class="MsoNormal" style>Thanks</p><p class="MsoNormal" style> </p><p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-family:"Arial","sans-serif";color:#7e7e7e">Qui Le</span></b></p>
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