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internexe
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FS.com BiDi SFPs?

Fri Aug 04, 2017 3:49 pm

Does anyone know any regular (and + version?) BiDis available at fs.com that work with Mikrotik? I dug through the list but couldn't come up with anything matching from FS.com.

I know some users have had good luck with generic FS units, so just wondering if anyone came across some compatible BiDi units.
I tried:
SFP-GE-BX from fs.com
BLSFP-10G23-10 from fs.com
The both came up and identified, but could not link.

I use these units quite a bit in other applications, they are cheap and work great, would be amazing if MT would incorporate them in the future bugfix chain.

Thanks!
 
internexe
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Re: FS.com BiDi SFPs?

Wed Aug 09, 2017 10:47 pm

Bump. Still looking for any kind of kown BiDi SFPs from fs.com if anyone knows of some.
 
bds1904
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Re: FS.com BiDi SFPs?

Fri Aug 11, 2017 1:58 am

They work just fine in every single Routerboard router and switch over ever put them in. I use them for single-fiber links to outbuildings quite often. I just get the "Generic" fs.com ones. I've even used a 10gb SFP+ BiDi before.
 
Miracle
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Re: FS.com BiDi SFPs?

Fri Aug 11, 2017 4:19 am

Just order, they will contact you to make it compatible with your device before shipping.
 
leonman
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Re: FS.com BiDi SFPs?

Tue Aug 15, 2017 6:05 am

FS.com has a category for customized SFPs, its a large list of manufactures, connector types, and operating temperatures you can pick from. Just follow the links, find the transceiver that fits your needs, then hit the drop down for "Compatible Brands" MikroTik is listed in the drop down to my knowledge.
BiDi SFP+: http://www.fs.com/c/customized-sfp-plus ... -sfp=19608
BiDi SFP: http://www.fs.com/c/customized-sfp-2985?bidi-sfp=19604
 
Andrewyi12
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Re: FS.com BiDi SFPs?

Tue Aug 22, 2017 11:38 am

Yeah, FS.COM provides a wide range of compatible BiDi SFP+ transceiver.
General: http://www.fs.com/c/bidi-sfp-plus-64
Generic: http://www.fs.com/c/generic-bidi-sfp-plus-2364
 
PackElend
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Re: FS.com BiDi SFPs?

Tue Nov 03, 2020 9:42 pm

then hit the drop down for "Compatible Brands" MikroTik is listed in the drop down to my knowledge.
MikroTik is almost not listed. How do I know that I chose the right one?
 
mhugo
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Re: FS.com BiDi SFPs?

Wed Nov 04, 2020 9:11 am

Hi,

We have several houndred fs.com bidis in the network and it works fine with the generic coding for us.

/M
 
PackElend
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Re: FS.com BiDi SFPs?

Wed Nov 04, 2020 9:15 am

what network equipment do you use or easier, how do I know how to choose the right one?

My intended hardware is described in Optical cable and SFP advice - MikroTik

feedback is really highly appreciated the SFP are my last piece in the puzzle.
 
mbovenka
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Re: FS.com BiDi SFPs?

Wed Nov 04, 2020 1:12 pm

what network equipment do you use or easier, how do I know how to choose the right one?

My intended hardware is described in Optical cable and SFP advice - MikroTik

feedback is really highly appreciated the SFP are my last piece in the puzzle.

I'd say that this: https://www.fs.com/de-en/products/37922.html should be the correct one, customized for MikroTik (which you can do). At the other end of the link use this: https://www.fs.com/de-en/products/37925.html. Whether the customizing is strictly neccessary I don't know (my TP-Link TL-SM321B works without issues in an SFP+ cage of my CCR1036-8G-2S+), but it can't hurt.

That's a set of 1000BASE-BX10-U(plink) & -D(ownlink) optics respectively which you need to drive the simplex fiber path.

For 10G use https://www.fs.com/de-en/products/115657.html & https://www.fs.com/de-en/products/37070.html respectively (10GBASE-BX40-U & -D).
 
PackElend
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Re: FS.com BiDi SFPs?

Wed Nov 04, 2020 5:01 pm

FS was that nice and made a drawing, see Optical cable and SFP advice - MikroTik

I'm still a bit puzzled why do I need when I have only a single point to point connection
That's a set of 1000BASE-BX10-U(plink) & -D(ownlink) optics respectively which you need to drive the simplex fiber path.
So one SFP has to type uplink and the other downlink, isn't it? But why, is there any explanation for this?
DOM support makes sense as well but what else di I need to take into account?
There are multiple SFP-GE-BX, only distance, wavelength and connector type changes. How do I choose the right wavelength?
 
PackElend
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Re: FS.com BiDi SFPs?

Wed Nov 04, 2020 5:21 pm

I think I got it, as I found but
  • Is there any advantage to use a CWDM or DWDM for VTRUNK trunk (if technically possible to put each VLAN on a different wavelength)
  • shall I still use duplex for switch to switch connection or is there no difference to using a BiDi?
 
mkx
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Re: FS.com BiDi SFPs?

Wed Nov 04, 2020 7:01 pm

BiDi gives full duplex connection over single fibre by using different wavelengths for different directions (as opposed to usual setup where pair of fibres is used, one for Tx and the other for Rx, bot ways using same wavelength). So you need a pair of SFPs where one SFP uses some wavelength to transmit while the other one uses same wavelength to receive. The other SFP uses different wavelength to transmit (not to cause interference with Rx path) and the first SFP uses the same wavelength to receive. Which particular wavelengths are used depends on type of fibre used (single-mode versus multi-mode), in multimode it could be 850nm for one direction (i.e. SFP1 Tx ... SFP2 Rx) and 900nm for other direction (i.e. SFP1 Rx ... SFP2 Tx). For single-mode fibres usually 1310nm and 1550nm are used.
Configuration on ports on both ends does not have anything to do with duplex nature of this connection and should mostly be set to full-duplex.

xWDM systems offer higher capacity over same (usually pair of) fibre by offering multiple independent channels. CWDM SFPs are usually capable of using only single channel (single wavelength) and other (passive) equipment is needed to merge separate light sources into single fibre. DWDM systems are more or less similar to CWDM only that they use narrower bands of light offering larger number of independent channels. Some SFPs can work with multiple channels concurrently.
In usual SOHO/datacentre, where fibre connections are not longer than (a few) 100 metres and pulling a few more fibres is not a problem, the complication of using xWDM technology just isn't worth doing it.
BR,
Metod
 
PackElend
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Re: FS.com BiDi SFPs?

Sun Nov 15, 2020 1:34 pm

sorry for my late reply @mkx.
Thank you for your input, another piece of the puzzle added :).

In usual SOHO/datacentre, where fibre connections are not longer than (a few) 100 metres and pulling a few more fibres is not a problem, the complication of using xWDM technology just isn't worth doing it.
What complication would I encounter?
Pulling a few more fibres is not much of big deal but running out of ports could be :)
 
mkx
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Re: FS.com BiDi SFPs?

Sun Nov 15, 2020 5:50 pm

As I already explained: most of times xWDM SFPs are only capable of using single WDM channel. Even those DWDM SFPs capable of simultaneously using multiple channels usually use those for higher throughput of a single data stream (sort of bonding those DWDM channels). So by using xWDM, you don't really save on number of ports on active equipment, xWDM system can not be used as a sort of port multiplicator.

The complication of using xWDM (as compared to usual fibre connections):
  • use of xWDM multiplexers/demultiplexers
    These are passive devices which add/drop certain wavelength from "trunk" fibre ... and direct that wavelength to separate (pair of) optical connector. This comes with a price: already mux/demux comes with power loss (usually around 1dB per box, there are 2 in the link), it also usually means one additional optical connector (with additional 0.5dB or so loss).
    They also come with a price tag. Mikrotik has their own offering, which according to the product brochure, is not exactly the best in the class.
  • use of xWDM SFPs. They are both more expensive than "normal" ones and one has to be careful to use SFPs with correct wavelength according to the wavelength assigned on MUX. And one has to do it correctly on both ends of link.
  • I'm not sure if xWDM is actually available for multi-mode optics (other than BiDi) ... which means using slightly more expensive fibre cables
  • "trunk" fibre always runs between pair of MUX boxes ... if active equipment, using those xWDM links, is not all concentrated around those two points, it is still necessary to use (lengthy) patch cables. If inter-MUX distance is not considerable, then length of those patch cables could approach length of (hypothetical) direct connection between active equipment.
BR,
Metod
 
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Re: FS.com BiDi SFPs?

Sun Nov 15, 2020 7:34 pm

Go to their site fs.com, they'll ask the equipment you'll be using on both ends then advise you accordingly.

Everything works well.

I have used their modules with CCR 1009, 1016, 1036, 1072, CRS 317 & 328.
:idea:
 
PackElend
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Re: FS.com BiDi SFPs?

Sun Nov 15, 2020 10:28 pm

thx for the information I'm just curious :)

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