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<div class="">I have an ICX 7750 that has an SFP port acting really strange. This has been installed for about 9 months now and a couple weeks ago I plugged up a new interface with a 10G LR SFP+. The new connection ran fine until yesterday. The link suddenly
dropped with the only message in the console stating that the link had dropped. No errors.</div>
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<div class="">Today I visited the switch and swapped out the SFP+ thinking that could have gone bad even though it was brand new, no change. I swapped out the fiber jumper, no change. I did the same on the other end of the link, no change. After doing all
of that, I moved the SFP+ to a different port and it linked right up. That was interesting so next I logged into the switch just to see what I can figure out.</div>
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<div class="">At first, it showed there was no SFP in the port:</div>
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<div class="">#sh media e 1/1/5</div>
<div class="">Port 1/1/5: Type : EMPTY</div>
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<div class="">After some time passed (maybe a couple hours), it started showing this:</div>
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<div class="">#sh media e 1/1/5</div>
<div class="">Port 1/1/5: Type : 1GE M-SX(SFP)</div>
<div class=""><span class="Apple-tab-span" style="white-space:pre"></span> Vendor: <span class="Apple-tab-span" style="white-space:pre">
</span>Version: </div>
<div class=""><span class="Apple-tab-span" style="white-space:pre"></span> Part# : <span class="Apple-tab-span" style="white-space:pre">
</span>Serial#: </div>
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<div class="">And then again, after another couple hours, it shows this:</div>
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<div class="">#sh media e 1/1/5</div>
<div class="">Port 1/1/5: Type : 10GE LR 10km ((SFP+))</div>
<div class=""><span class="Apple-tab-span" style="white-space:pre"></span> Vendor: ????????????????
<span class="Apple-tab-span" style="white-space:pre"></span>Version: ??</div>
<div class=""><span class="Apple-tab-span" style="white-space:pre"></span> Part# : ????????????????
<span class="Apple-tab-span" style="white-space:pre"></span>Serial#: ???????????????</div>
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<div class="">I did not touch the port or the SFP during the time between the media checks. Note that it went from empty, to showing a 1G SFP, to showing a 10G LR SFP+. It’s not reading part numbers or serial numbers or anything. </div>
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<div class="">I’ve tried just reloading the switch from the CLI. I have not tried a complete power cycle yet. </div>
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<div class="">I wanted to see if anyone had any ideas to try before I go opening up a TAC case.</div>
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<span style="color: rgb(0, 0, 0); font-family: Helvetica; font-size: 12px; font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px; display: inline !important; float: none;" class="">-Christopher</span>
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