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Unsupported SFP on Cisco 2960

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ppomary at gmail

Jul 25, 2012, 11:02 AM

Post #1 of 8 (991 views)
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Unsupported SFP on Cisco 2960

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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scott at granados-llc

Jul 25, 2012, 11:09 AM

Post #2 of 8 (940 views)
Permalink

Re: Unsupported SFP on Cisco 2960 [In reply to]

The only problem you're likely to have is with your wallet if you buy Cisco branded optics.:)

Others may disagree but I have never had any problem with 3rd party transceivers in lots of products including the 2900 series.

On Jul 25, 2012, at 2:02 PM, pamela pomary <ppomary [at] gmail> 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
> _______________________________________________
> cisco-nsp mailing list cisco-nsp [at] puck
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/

_______________________________________________
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SeniorJ at bennettjones

Jul 25, 2012, 11:14 AM

Post #3 of 8 (955 views)
Permalink

Re: Unsupported SFP on Cisco 2960 [In reply to]

I've interpreted the warning as Cisco removing their support and liability requirements for the optics themselves, "My SFP doesn't work, help". I wouldn't expect any data issues whatsoever. They'll continue to support the switch as normal for non-gbic issues. I've been running service unsupported-transceiver for many years with no issues. As long as it's [eventually] recognized, it's good.

-----Original Message-----
From: cisco-nsp-bounces [at] puck [mailto:cisco-nsp-bounces [at] puck] On Behalf Of Scott Granados
Sent: 25 July 2012 12:10 PM
To: pamela pomary
Cc: cisco-nsp [at] puck
Subject: Re: [c-nsp] Unsupported SFP on Cisco 2960

The only problem you're likely to have is with your wallet if you buy Cisco branded optics.:)

Others may disagree but I have never had any problem with 3rd party transceivers in lots of products including the 2900 series.

On Jul 25, 2012, at 2:02 PM, pamela pomary <ppomary [at] gmail> 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
> _______________________________________________
> cisco-nsp mailing list cisco-nsp [at] puck
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/

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jared at puck

Jul 25, 2012, 11:17 AM

Post #4 of 8 (941 views)
Permalink

Re: Unsupported SFP on Cisco 2960 [In reply to]

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> 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
> _______________________________________________
> cisco-nsp mailing list cisco-nsp [at] puck
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/

_______________________________________________
cisco-nsp mailing list cisco-nsp [at] puck
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/

ppomary at gmail

Jul 25, 2012, 11:29 AM

Post #5 of 8 (942 views)
Permalink

Re: Unsupported SFP on Cisco 2960 [In reply to]

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> 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> 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
> > _______________________________________________
> > cisco-nsp mailing list cisco-nsp [at] puck
> > https://puck.nether.net/mailman/listinfo/cisco-nsp
> > archive at http://puck.nether.net/pipermail/cisco-nsp/
>
_______________________________________________
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johgill at cisco

Jul 25, 2012, 12:51 PM

Post #6 of 8 (945 views)
Permalink

Re: Unsupported SFP on Cisco 2960 [In reply to]

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> 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> 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
>>> _______________________________________________
>>> cisco-nsp mailing list cisco-nsp [at] puck
>>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>>> archive at http://puck.nether.net/pipermail/cisco-nsp/
>>
> _______________________________________________
> cisco-nsp mailing list cisco-nsp [at] puck
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/
>
_______________________________________________
cisco-nsp mailing list cisco-nsp [at] puck
https://puck.nether.net/mailman/listinfo/cisco-nsp
archive at http://puck.nether.net/pipermail/cisco-nsp/

jfitz at princeton

Jul 25, 2012, 1:17 PM

Post #7 of 8 (946 views)
Permalink

Re: Unsupported SFP on Cisco 2960 [In reply to]

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> 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> 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
>>>> _______________________________________________
>>>> cisco-nsp mailing list cisco-nsp [at] puck
>>>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>>>> archive at http://puck.nether.net/pipermail/cisco-nsp/
>>>
>> _______________________________________________
>> cisco-nsp mailing list cisco-nsp [at] puck
>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>> archive at http://puck.nether.net/pipermail/cisco-nsp/
>>
> _______________________________________________
> cisco-nsp mailing list cisco-nsp [at] puck
> https://puck.nether.net/mailman/listinfo/cisco-nsp
> archive at http://puck.nether.net/pipermail/cisco-nsp/

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nick at foobar

Jul 25, 2012, 2:33 PM

Post #8 of 8 (949 views)
Permalink

Re: Unsupported SFP on Cisco 2960 [In reply to]

On 25/07/2012 19:17, Jared Mauch wrote:
> You will only save money. SFP is a standard media just like USB ports.

It is a standard medium, just like e.g. SATA or SCSI is a standard medium.
It's a hardware interface mechanism and is subject to driver bugs,
interface protocol ambiguities, hardware peculiarities and all that. In
moment of frustration about why vendors decline to support third party
SFPs, I occasionally browse the OSS source code to various hardware drivers
to get some sort of understanding of the quirks and general messing around
that a low-level driver of this form would need to be able to handle
gracefully.

e.g.:

> http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/dev/ixgbe/ixgbe.c?annotate=1.53.2.6
> http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/dev/ixgbe/ixgbe_phy.c?annotate=1.11.2.3

Having said that, I am a happy user of third party transceivers for all my
optical requirements. Will happily give the vendor first refusal on any
third party quotation I get, but it's an offer that they generally don't
take up.

Nick

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