It's the 2nd cable, I've already replaced it once. On 10/27/2021 1:06 PM, Bill Prince wrote:
You know, it just might be the angle of the polish on the ends of the SFP and cable that line up just enough to attenuate the signal. IDK, but if I had a cable like that, I think I would pull out my kitchen shears and chop it into little pieces.-- bp part15sbs{at}gmail{dot}comOn Wed, Oct 27, 2021 at 10:43 AM Nate Burke <n...@blastcomm.com <mailto:n...@blastcomm.com>> wrote:I think it must be the fiber demons, same cable run just failed again. Replaced SFP's with no change, changed 1M patch cable again and that fixed it. One side was showing 40db loss on the RX according to the SFP Stats. Was working fine until suddenly it wasn't. On 9/30/2021 4:37 PM, Chuck McCown via AF wrote:-- AF mailing listFirst real computer class. We had to buy a floppy. I bought one, thought I would never fill it. *From:* Bill Prince *Sent:* Thursday, September 30, 2021 3:11 PM *To:* af@af.afmug.com *Subject:* Re: [AFMUG] Patch cable failure Kind of like the 5-1/4" floppies of yesteryear. If all the tolerances line up the wrong way, they technically could not work. bp <part15sbs{at}gmail{dot}com> On 9/30/2021 1:36 PM, Adam Moffett wrote:Heh, "fiber demons." A few months back I swapped a cable between an old Cisco X2 card and a patch panel and the port wouldn't link up. Cleaned and checked everything, ran the OTDR, tried another cable, nothing worked. Then I put the old patch cable back in and it linked right up. Switched back and forth, tried the new patch cable on a different interface. Everything checks out except this one port won't link unless this one cable. I still don't know what that's all about. Maybe the port and the connectors are both at the same extreme end of dimensional tolerances. ....or maybe it's those "fiber demons" you mention. -Adam On 9/30/2021 4:08 PM, Nate Burke wrote:Put the patch cable on the VFL, nothing showed up. Light came out the other end, no spots along the cable unless I bent it tight. I'll just mark it up to the fiber demons. On 9/28/2021 7:47 AM, Josh Luthman wrote:100% chance the VFL finds something. Light is light - be it a red blinker or SFP blink. Josh Luthman 24/7 Help Desk: 937-552-2340 Direct: 937-552-2343 1100 Wayne St Suite 1337 Troy, OH 45373 On Thu, Sep 23, 2021 at 10:10 AM Nate Burke <n...@blastcomm.com> wrote: Maybe I should go pull it out of the garbage and put the VFL on it to see if there's anything On 9/23/2021 9:05 AM, Chuck McCown via AF wrote: > We had one do that in a splice case a few weeks back. Just decided to break all by itself. Maybe temperature or vibrations did it. Very visible fault with the VFL. > > Sent from my iPhone > >> On Sep 23, 2021, at 7:56 AM, Nate Burke <n...@blastcomm.com> wrote: >> >> If I didn't diagnose it, I wouldn't have believed it. 1M SM fiber Patch cable installed in a rack between router and a switch. Link went down at exactly noon. Router had no link, switch showed link. Replaced both SFP's with no change. Reversed patch cable and link came up. Put back to original, no link. Threw that cable in the garbage and put in a new one. I have a camera looking at the front of this rack. Nothing moved when the link went down, I can see the link light turn off on the router when it failed. >> >> I never would have believed a fiber patch cable would just up and fail with no external force. >> >> -- >> AF mailing list >> AF@af.afmug.com >> http://af.afmug.com/mailman/listinfo/af_af.afmug.com <http://af.afmug.com/mailman/listinfo/af_af.afmug.com>-- AF mailing listAF@af.afmug.com http://af.afmug.com/mailman/listinfo/af_af.afmug.com <http://af.afmug.com/mailman/listinfo/af_af.afmug.com>-------------------------------------------------------------------------- AF mailing listAF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com <http://af.afmug.com/mailman/listinfo/af_af.afmug.com>AF@af.afmug.com <mailto:AF@af.afmug.com> http://af.afmug.com/mailman/listinfo/af_af.afmug.com <http://af.afmug.com/mailman/listinfo/af_af.afmug.com>
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