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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