I have sourced optics from these and several other Chinese and European manufacturers. I even have a couple different SFP/SFP+/XFP/QSFP coders so that I can overwrite their firmwares to be compatible with different equipment. Between versions for different vendor compatibility, the transceiver hardware should be identical with the exception of HP. Those have a difference outside of the typical MSA fields and have to be manufactured as HP. I'm guessing they picked this up from their ink-cartridge side of the business.
The rest that aren't openly MSA compliant use dirty tricks to lock you into buying their transceivers in order to avoid various levels of rejection. Cisco, for example, uses a hashing algorithm on the Vendor Part Number and Vendor Serial Number fields and places the result in a different field that much match their check in order to pass as genuine Cisco. However, they don't do this on the Nexus platform. Others just check that the Vendor Part Number matches one of their known part numbers, or do other similar checks. The different Chinese manufacturers vary in their experience and understanding of how to properly clone them for the requested compatibility. If you get a batch that doesn't work for a non-MSA compliant vendor, it's likely that it's just coded improperly. If you are using an MSA compliant vendor and are still having a high failure rate, you should look to a different source. I have yet to find one that doesn't occasionally produce transceivers that fail, but there are definitely better and worse sources as far as reliability as well as accuracy of DDM/DOM. Roger On Thu, May 28, 2015 at 6:06 PM, Bill Prince <[email protected]> wrote: > Not exactly. > > We got a batch of SFPs from MT that all failed. Not all at once; some of > them failed out of the box, a few others failed after a week or two. We > needed to replace them ASAP, and got a handful of them from a local vendor. > They were generic SFPs labeled "OEM", but we were able to get them at will > call within a couple of hours. > > At that point, we sent them back to MT on warranty. The replacements have > all seemed to work, so I think that this was some sort of glitch in their > sourcing or something like that. > > bp > <part15sbs{at}gmail{dot}com> > > > On 5/28/2015 3:41 PM, George Skorup wrote: > > So what you're saying is... MikroTik stuff isn't all that reliable? ;) > > On 5/28/2015 2:21 PM, Bill Prince wrote: > > That's similar to what we saw with the MT ones; slide out/slide in, and > they would work for a while. We weren't sure if we were having issues with > the RB260GS or the SFPs. > > After a couple rounds of that, the SFPs just quit working altogether. It > was just a small group of SFPs we got from MT that all had the same issue. > We replaced them with generic SFPs and have not had problems since. > > bp > <part15sbs{at}gmail{dot}com> > > > On 5/28/2015 12:16 PM, Sterling Jacobson wrote: > > I think I’ve seen that a couple of times with the RB260GS units as well. > > > > Mostly during a brownout or power spike. > > > > Not all of them, just one or two out of hundreds. > > > > Had to re-rack the SFP to get them to connect. > > > > This happened with the Mikrotik branded ones, FiberStore branded ones, and > I think the generic ones too. > > > > *From:* Af [mailto:[email protected] <[email protected]>] *On > Behalf Of *Jason McKemie > *Sent:* Thursday, May 28, 2015 12:55 PM > *To:* [email protected] > *Subject:* Re: [AFMUG] Multimode BIDI > > > > I've had some issues with Occam compatible SFPs in RB260gs units - they > would work, but you would have to unplug them and plug them back in while > the unit was powered up to get them to link. So if the Mikrotik loses > power, the link goes down until you pull the SFP again. Not sure if that > was just with that particular SFP model though, as I haven't had any > problems with the generic units. > > > > I've also had an issue with Mikrotiks linking to a planet switch, but that > was some incompatibility between the actual devices, not the SFPs. > > On Wednesday, May 27, 2015, George Skorup <[email protected]> wrote: > > I've heard too many stories of modules "working" but not working. It's > detected, you get link status and all that, but end up with packet loss > and/or CRC/FCS errors. > > The only SFPs I've used with Routerboards so far are MikroTik branded. I > have one talking to a Ciena 3930. And another talking to a dumb media > converter. Those both work fine. > > Was it Jason that was having issues getting them to talk cleanly to a > Cisco or Planet switch? > > I really don't trust any MikroTik product to be very reliable, but they're > cheap so we can have lots of spares. :) > > On 5/27/2015 9:28 PM, Faisal Imtiaz wrote: > > will it work in a MikroTik!? > > Why shouldn't they ? > > To the best of my knowledge MT don't use locked Optics.. additionally > SFP's & SFP+'s are a standard .. > There are a few options on the modules (mostly for reporting light levels > and temp etc) that may or may not work... > > > 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: [email protected] > > ----- Original Message ----- > > From: "George Skorup" <[email protected]> > To: [email protected] > Sent: Wednesday, May 27, 2015 9:44:55 PM > Subject: Re: [AFMUG] Multimode BIDI > > Nice. $30-50 an end ain't bad. BUT.. will it work in a MikroTik!? > > On 5/27/2015 8:31 PM, Faisal Imtiaz wrote: > > also... > > http://www.sfpex.com/bidi-sfp/1g-bidi > > 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: [email protected] > > ----- Original Message ----- > > From: "Faisal Imtiaz" <[email protected]> > To: [email protected] > Sent: Wednesday, May 27, 2015 9:23:30 PM > Subject: Re: [AFMUG] Multimode BIDI > > Nate, > > If you are not able to locate the MM Bidi SFP's, you might want to try the > SMF Bidi on your MM fiber run.. > > Take a look at this:- > > > https://www.flexoptix.net/blog/en/2013/07/bidi-in-operation-on-multimode-fibre/ > > > 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: [email protected] > > ----- Original Message ----- > > From: "Nate Burke" <[email protected]> > To: "Animal Farm" <[email protected]> > Sent: Wednesday, May 27, 2015 3:07:41 PM > Subject: [AFMUG] Multimode BIDI > > Is there a MultiMode BIDI SFP? I need to run a connection across a > warehouse, they have 3 pair of multimode fiber, but all 3 are already in > use. They won't let me tunnel connections together, because that would > be touching 'their' network, but I could probably talk them into using > only a single Strand, to let me have one. > > Googling around hasn't yielded any results yet, but I'm still > searching. Any other passive deivce to get 2 connections on one/pair > Multimode fiber? > > Nate > > > > > > > > >
