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G'day Burt,</div>
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We had an "interesting" issue with 10GBE at work a few months back, similar story in that packets seemed to be just black-holing into nowhere.</div>
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Unfortunately what had occured is that an SFP+ Optic had failed on the Rx direction only, and as such none of the upstream switches detected the issue or reported any sort of broken/corrupt packets.</div>
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I diagnosed it by seeing at first that all Tx/Rx stats on the switches were perfect, and no links were reporting down.</div>
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It seems that early versions of the Dell Force10 M IO Aggregators dont support proper stat collections or thresholding to trigger SNMP alarms.</div>
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Only when a show tech was run was there a sneaky line that didnt directly say it was the issue, but turns out the counter was the Rx CRC Error Counter.</div>
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We changed out all the SFP+'s on the Dell end (to newer now "qualified" Optics)<span style="color: rgb(0, 0, 0); font-family: Calibri, Helvetica, sans-serif; font-size: 12pt;"> cleaned and scoped all flyleads and havent seen the issue since!</span></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> AusNOG <ausnog-bounces@lists.ausnog.net> on behalf of Burt Mascareigne <Burt@stormnetwork.com.au><br>
<b>Sent:</b> 08 November 2017 13:23<br>
<b>To:</b> <ausnog@lists.ausnog.net><br>
<b>Subject:</b> [AusNOG] 10GBs</font>
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<p class="x_MsoNormal">Hi Noggers</p>
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<p class="x_MsoNormal">We’re having “fun” with 10GB NICS, Switches and SFPs.</p>
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<p class="x_MsoNormal">We can’t work out which is causing drop out, packets.. we are somewhat certain packets are vanishing into the Ether..</p>
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<p class="x_MsoNormal">We don’t know which is causing what. </p>
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<p class="x_MsoNormal">I’m not after troubleshooting, I am curious what people’s view on this.
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<p class="x_MsoNormal">Do you buy 1 Vendor for all your 10GBs, A-Z, is there some hidden rule about mixing vendors, is this all trial and error (and very expensive at best)?</p>
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<p class="x_MsoNormal">Any recommendations on set ups? Preferred Vendors, Vender to avoid like the plague. </p>
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<p class="x_MsoNormal">We’re talking Servers to Switch kind of thing. Not SANs etc. Good ol’ HyperVisor to the switch.</p>
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<p class="x_MsoNormal">Thanks </p>
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<p class="x_MsoNormal"><span lang="EN-US" style="font-size:10.0pt; font-family:"Arial",sans-serif; color:black">Regards,</span></p>
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<p class="x_MsoNormal"><span lang="EN-US" style="font-size:10.0pt; font-family:"Arial",sans-serif; color:black"> </span></p>
<p class="x_MsoNormal"><b><span lang="EN-US" style="font-size:10.0pt; font-family:"Arial",sans-serif; color:black">Burt Mascareigne<br>
Mobile</span></b><span lang="EN-US" style="font-size:10.0pt; font-family:"Arial",sans-serif; color:black"> 0414 450 962 <b>Office</b> (02) 9965 5422<br>
<b>Address</b> Level 19, 1 O’Connell Street, Sydney NSW 2000<br>
<b>Web</b> <a href="http://www.stormnetwork.com.au/"><span style="color:#1F497D">http://www.stormnetwork.com.au</span></a><br>
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