[c-nsp] SFP DOM SNMP Polling?

Mel Beckman mel at beckman.org
Tue Nov 22 17:39:50 UTC 2016


I totally missed the fact that reads don’t stress EEPROMs! <blush>

Excellent point, and makes the vendor’s claim totally bogus.

Probably just one employees claim, but the vendor should step up and fix the real problem.


> On Nov 22, 2016, at 9:11 AM, Michael Loftis <mloftis at wgops.com> wrote:
> On Tue, Nov 22, 2016 at 6:32 AM, Tim Durack <tdurack at gmail.com> wrote:
>> I have a vendor that does not support SFP DOM SNMP polling. They state this
>> is due to EEPROM read life cycle. Constant reads will damage the SFP.
> Complete and total garbage.  Reading from EEPROM and Flash both DO NOT
> WEAR.  It is the erase+write cycle that wears them.  Further typical
> EEPROM life cycle is ~1M erase/write cycles.  If you wrote it every
> minute you could conceivably wear it out in a couple years...but thats
> flat out not how it works.  The EEPROM, if any, is not going to be
> used for statistics data....maybe fail counts of some kind, lifetime
> (hours) maybe...that sort of thing.
>> We SNMP poll SFP DOM from Cisco equipment without issue.
>> Not heard this one before. Trying to see if there is some validity to the
>> statement. Thoughts?
>> Tim:>
>> _______________________________________________
>> cisco-nsp mailing list  cisco-nsp at puck.nether.net
>> https://puck.nether.net/mailman/listinfo/cisco-nsp
>> archive at http://puck.nether.net/pipermail/cisco-nsp/
> -- 
> "Genius might be described as a supreme capacity for getting its possessors
> into trouble of all kinds."
> -- Samuel Butler

More information about the NANOG mailing list