[c-nsp] Unsupported SFP on Cisco 2960

[Jeffrey G. Fitzwater]

How does DOM support fit into all this?   CISCO SFP vs 3rd party?  If a third party tells you they support DOM, does that mean it works as advertised and the values returned are correct.    Is this a good reason to buy only CISCO?


Jeff Fitzwater
OIT Network Systems
Princeton University
On Jul 25, 2012, at 3:51 PM, John Gill wrote:

> The SFP is a standard, and if there is any problem with that link, it is just a reasonable expectation that you won't ask TAC to troubleshoot it or tell you what is wrong with it, and obviously can't replace it.
> 
> There are certainly certified SFPs that work great and others that will be flaky.  If cisco makes a flaky model, it's our responsibility to support/replace/fix that issue.  If you have a problem with a 3rd party SFP, you would just need to take it up with them.
> 
> Regards,
> John Gill
> cisco
> 
> 
> On 7/25/12 2:29 PM, pamela pomary wrote:
>> Thank you all folks for your quick responses. Am grateful :). I can breathe
>> a sigh of relief now.
>> 
>> On Wed, Jul 25, 2012 at 6:17 PM, Jared Mauch <jared at puck.nether.net> wrote:
>> 
>>> You will only save money. SFP is a standard media just like USB ports.
>>> 
>>> Jared Mauch
>>> 
>>> On Jul 25, 2012, at 2:02 PM, pamela pomary <ppomary at gmail.com> wrote:
>>> 
>>>> Hello Folks,
>>>> 
>>>> I have a peculiar problem. I have followed postings in the forum and I
>>>> believe your experience with Cisco networks will help answer my question.
>>>> 
>>>> I have a Cisco 2960 with Gigabit SFP module. I connected a third party
>>>> addon SFP GBIC to 2960 switch and I get the following error that disables
>>>> the interface.
>>>> 
>>>> *Mar 16 21:05:15.720: %GBIC_SECURITY_CRYPT-4-VN_DATA_CRC_ERROR: GBIC in
>>>> port Gi0/2 has bad crc
>>>> *Mar 16 21:05:15.720: %PM-4-ERR_DISABLE: gbic-invalid error detected on
>>>> Gi0/2, putting Gi0/2 in err-disable state
>>>> 
>>>> After checking online I found these two command lines that corrects the
>>>> error
>>>> on the Cisco 2960 switch and brings the interface up.
>>>> 
>>>> 1) no errdisable detect cause gbic-invalid
>>>> 2) service unsupported-transceiver
>>>> 
>>>> Cisco 2960 switch however reported a warning on entering the second
>>> command:
>>>> 
>>>> "Warning: When Cisco determines that a fault or defect can be traced to
>>>> the use of third-party transceivers installed by a customer or reseller,
>>>> then, at Cisco's discretion, Cisco may withhold support under warranty or
>>>> a Cisco support program. In the course of providing support for a Cisco
>>>> networking product Cisco may require that the end user install Cisco
>>>> transceivers if Cisco determines that removing third-party parts will
>>>> assist Cisco in diagnosing the cause of a support issue."
>>>> 
>>>> I understand Cisco's warranty terms mentioned in the above Warning.
>>>> 
>>>> My worry is, is it safe to do this. Is it likely I will have problems in
>>>> future
>>>> with the switch. Am I likely to experience abnormal data transfer on the
>>>> network in future?
>>>> 
>>>> 
>>>> Thank You
>>>> 
>>>> Pamela Pomary
>>>> ICT Dept.
>>>> University of Ghana
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