[27223] in resnet
Re: Ethernet ports "burning out"
daemon@ATHENA.MIT.EDU (Johnson, Neil M)
Mon Jan 30 15:58:39 2012
Content-Language: en-US
Content-Type: text/plain; charset="us-ascii"
Content-ID: <A99375266DF97047A9A65D96C081CB38@mailhost6.uiowa.edu>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
Message-ID: <CB4C5E9C.96DDE%neil-johnson@uiowa.edu>
Date: Mon, 30 Jan 2012 20:58:26 +0000
Reply-To: Resnet Forum <RESNET-L@listserv.nd.edu>
From: "Johnson, Neil M" <neil-johnson@uiowa.edu>
To: RESNET-L@listserv.nd.edu
In-Reply-To: <CAGDOHXs11NsBZix3rZ+RqaDX9+2btU0KYHb=G=N1adfhPKS7pA@mail.gmail.com>
For years we had issues with ports in our Residence Halls going bad due to
ESD, requiring the replacement of entire line cards.
In most cases the port would show link, but no address would appear in the
MAC address table for the port.
The switch vendor blamed it on our cable claiming that it was static build
up on outer jack of cable.
When it started we were replacing 10-20 line cards every fall. It's
finally slowed to a point where we haven't had any in the last two years..
(knock on wood).
-Neil
--
Neil Johnson
Network Engineer
The University of Iowa
Phone: 319 384-0938
Fax: 319 335-2951
Mobile: 319 540-2081
E-Mail: neil-johnson@uiowa.edu
On 1/28/12 6:26 PM, "Jim Warner" <warner@ucsc.edu> wrote:
>The datasheet for the X250e includes:
>
>> EN 55024:A2-2003 Class A includes IEC 61000-4-2, 3, 4, 5, 6, 11
>
>It also says
>
>> IEC/EN 61000-4-2:2001 Electrostatic Discharge, 8kV Contact, 15 kV Air,
>>Criteria A
>
>So your switch should be hardened against static discharge.
>
>Your older switch, well, I don't see its data sheet on line. But
>maybe you've got one and can check.
>
>If you're RMAing the switches, does that mean you have maintenance?
>If yes, on a repeated problem like this you should be able to ask
>their repair depot for some failure analysis.
>
>___________________________________________________
>You are subscribed to the ResNet-L mailing list.
>
>To subscribe, unsubscribe or search the archives,
>go to http://LISTSERV.ND.EDU/archives/resnet-l.html
>___________________________________________________
___________________________________________________
You are subscribed to the ResNet-L mailing list.
To subscribe, unsubscribe or search the archives,
go to http://LISTSERV.ND.EDU/archives/resnet-l.html
___________________________________________________
