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}com
On 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:
First 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.
>>
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