Finisar SFP/SFP+

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1

Anyone out there, know what is the 'code' sequence for programming Finisar SFP / SFP+ ?

Any and all assistance will be greatly appreciated (off list is fine).

Thanks.

Faisal Imtiaz
Snappy Internet & Telecom
7266 SW 48 Street
Miami, FL 33155
Tel: 305 663 5518 x 232

Help-desk: (305)663-5518 Option 2 or Email: Support@Snappytelecom.net

2

this is a very broken question. I'm going to assume you have a bunch of
finisar transceivers and you want to reprogram them to look like e.g. cisco
or juniper or whatevs.

You can find a bunch on the internet using your favourite search engine
with the term "sfp programmer". The difficulty is getting one which will
be able to reprogram your SFPs in the way that they need to be
reprogrammed. If the reprogrammer includes the software to do this
properly, you're on to a winner.

Nick

3

Hi Nick,

Thanks for the reply, and yes, your assumption is correct.
I was exploring / wanting to know the 'code' for re-programing Finisar SFP/SFP+

I do have a programmer and the software that goes with it.

Many for the SFP/SFP+ mfg. have 'locked' eeproms, they require a special sequence of code before they can be programmed. Finisar is one of them.

I was wanting to know if there is anyone who has such code for the Finisar SFP/SFP+.

Regards.

Faisal Imtiaz
Snappy Internet & Telecom
7266 SW 48 Street
Miami, FL 33155
Tel: 305 663 5518 x 232

Help-desk: (305)663-5518 Option 2 or Email: Support@Snappytelecom.net

4

there's a clear solution here: if a vendor locks the transceiver from
reprogramming, don't buy transceivers from them.

Nick

5

That is one way to deal with it.

:slight_smile:

Faisal Imtiaz
Snappy Internet & Telecom
7266 SW 48 Street
Miami, FL 33155
Tel: 305 663 5518 x 232

Help-desk: (305)663-5518 Option 2 or Email: Support@Snappytelecom.net

6

Cheap DIY SFP programmer using a Raspberry Pi:

http://eoinpk.blogspot.com/2014/05/raspberry-pi-and-programming-eeproms-on.html

Software:

https://code.google.com/p/sfppi/

Now we just need some code to brute-force the OEM passwords... How
fast is the 2-wire bus on SFPs?

7

This seems like overkill. I have been asking my vendors for the ability to deal with the SFF-MSA data properly and to not break their own optics in their own devices. (Yes, I've seen this).

I prefer my XFP/CFP/SFP/SFP+ ports unlocked properly from the factory and the ability to display all the SFF-MSA fields. So far everyone is making high quality CFP parts so I've not seen anything "odd" there aside from some vendors don't realize that 100G-LR4 should display all 4 lanes light levels.

If you are buying cheap SFPs you get what you pay for. We have had good luck with Finisar and Finisar OEM, which are available broadly in the market for a fair price. The best way to discourage the locking is to stop buying the optics from those that do engage in the locking activities.

It would also be helpful to list those optics that are poor in quality as well. This also may provide an incentive to those in the marketplace to improve them. (eg: I have no problem with a vendor blocking the same S/N from appearing multiple times in a chassis from a "cloned" optic, but if they are putting that effort into the driver, they also need to support their own optics in the chassis as well).

If nobody is aware of a SFP/XFP/CFP/whatnot database out there, perhaps we can crowdsource one as a community? This seems to be something that may provide value.

- jared