[foxboro] FW: Running Manual Cable Test - Automatically?
- From: "Shin, Won" <Won.Chul.Shin@xxxxxxxxxxx>
- To: "foxboro@xxxxxxxxxxxxx" <foxboro@xxxxxxxxxxxxx>
- Date: Tue, 5 Feb 2013 22:47:21 +0000
To Subscribers;
We have somewhat different issue but I'm wondering if someone knows how to run
Nodebus Cable test in a script file.
In our case we had a trouble with Nodebus Cable alarm resetting. After the NB
cable trouble resets System Alarm remains up and stays until you run Manual
Nodebus Cable test.
We are not allowing operator's access to NB cable test run through SMHD.
I need to let operator run this NB Cable test run from DCS operator screen with
one button click.
At least several times a year during the past 10 years, we had to call in DCS
technician to clear system alarm in the middle of the night.
Any comments or your advice would be appreciated.
Regards,
Won Shin of BC Hydro
-----Original Message-----
From: foxboro-bounce@xxxxxxxxxxxxx [mailto:foxboro-bounce@xxxxxxxxxxxxx] On
Behalf Of Barry Heap
Sent: 2013, February 05 1:45 AM
To: foxboro@xxxxxxxxxxxxx
Subject: Re: [foxboro] Running Manual Cable Test - Automatically?
Thanks to all ...
I have a few things to check ... Aim dead bands was not something I had thought
of .... But I suspect that they have not been set correctly ...
So far, we have pretty much run through the HH 'v7 slowdown checklist' - I'm on
my iPhone at the moment, so the number escapes me...
And yes, crossed A/B cables did get us on this site ... Even though we took
enormous care ... But you know in the heat of a diagnostic dilemma, things
happen.
I guess what is really annoying is that despite a due care, the v7.x systems I
have worked on still have the occasional slowdown.
Maybe it's noise on a cable, maybe just gremlins, but for no good reason one
cable must have been marked BAD ... And the Network Fault Detector is incapable
of realizing it really does have two perfectly good cables.
And the fix is so easy - cable test, then we have full speed back.
Maybe we will track if down one day ... Or maybe not ... For now if we could
somehow run the cable test in a script, we could get rid of the nasty side
effect.
Regards,
Barry Heap
On 05/02/2013, at 2:46 PM, Kevin Fitzgerrell <fitzgerrell@xxxxxxxxx> wrote:
> Barry,
> I'll echo Shawn and Brian's V7 experiences - in all the instances I've
> seen where V7 systems experienced slowdowns that were fixed by running
> the cable test (which is every V7 system I've worked with at some
> point) I've tracked the issue down to an underlying fault. Those
> faults have included crossed A/B cables between devices and switches,
> crossed A/B cables at NCNI's and "problem" RCNI's. At one site,
> crossed cable issues persisted for months after our fiber guys swore
> to me they'd confirmed everything until I gave up and personally
> checked each and every core (finding multiple crossed fibers). RCNI
> problems were harder - I had one where the only V7 part of the system
> was a single AW and RCNI - cables were perfect but kept having
> occasional slowdowns which a cable check would fix. Changing the RCNI fixed
> the problem. After finding that one I used that system to "confirm"
> good RCNIs.
>
> Does this V7 site have any V6.x pieces left or is it all V7?
>
> Have you set up nfd_log and nfd_debug to see what faults the system
> thinks it's getting?
>
> Cheers,
>
> Kevin
>
>
> On Mon, Feb 4, 2013 at 7:29 AM, Barry Heap
> <Barry.Heap@xxxxxxxxxxxxxxxxxxxx>wrote:
>
>> Hi List,
>>
>> We have a V7.x site running with NCNI/RCNI and Enterasys switches as
>> our Nodebus.
>>
>> We have experienced the V7.x slowdown that seems to be caused by
>> Cable faults that may be fleeting or longer term. Either way, the
>> first indication we get is the Operators informing the site engineers
>> that 'the screens are running slow again'.
>>
>> The fix is to run a Manual Nodebus Cable test and the fault clears
>> immediately.
>>
>> My question is:
>>
>> Is it possible to schedule a 'manual' Cable test to be run automatically?
>>
>> I know it may be an odd request, but the V7.x systems just don't
>> recover themselves the way the old V6.x systems do .. and the screen
>> slowdown is causing some grief on site.
>>
>> Oh, a V8.x upgrade is not an option at this time, or the near future...
>>
>> Thanks.
>>
>>
>> Barry Heap
>> Control Direction
>>
>>
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>
>
>
> ______________________________________________________________________
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