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Optical Network Configurations

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On 2/17/2019 at 3:52 PM, R1200CL said:

 

Lumin did not test any simplex BiDi SFP at all.  Everything we tested are duplex.  I also do not see a simplex non-SFP FMC offering from TP-Link, making it hard to advise customers how to migrate from a copper Ethernet to fiber network using a non-SFP FMC with a well-known brand that is compatibility proven and in use by other audiophiles.

 

By the way I ordered the fs.com fiber discussed above.  It looks like it is always custom made and requires a much longer lead time than other hardware like SFP modules.


Peter Lie

LUMIN Firmware Lead

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Here is another subjective SQ comparison of copper Ethernet from GS105 vs a pair of TP-Link FMC + LPS vs Lumin X1 optical network input:

https://6moons.com/audioreview_articles/lumin7/2/

 

Quote

The third configuration involved the Lumin X1's optical network input. Basically I expected a comparable result to using one TP-Link Gigabit MC210CS instead of two. But the sound quality increased with more extended treble, better transients and higher dynamics.

 


Peter Lie

LUMIN Firmware Lead

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On 2/21/2019 at 10:19 PM, wklie said:

 

Lumin did not test any simplex BiDi SFP at all.  Everything we tested are duplex.  I also do not see a simplex non-SFP FMC offering from TP-Link, making it hard to advise customers how to migrate from a copper Ethernet to fiber network using a non-SFP FMC with a well-known brand that is compatibility proven and in use by other audiophiles.

Agreed, the referenced SFP is of type 1000base-BX — don’t use

 

Use either 1000base-SX (multimode) or

1000base-LX (singlemode) “SX” is short range and “LX” is long range


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I'm thinking about setting up a bridge optical connection to my Pro iDSD DAC.

 

Right now my setup is Windows 10 PC -> Ethernet to Network switch -> network switch to Pro iDSD.

 

I'm thinking about getting a Mellanox Connectx2 card in bridge mode -> Optical fiber SFP cable -> Fiber Media Converter -> Ethernet cable to Pro iDSD.

 

This should work right? I haven't seen anyone trying to use a SFP 10G NIC and putting it into bridge mode. 

 

1. Mellanox Connectx2

2. Optical Module for Mellanox 

3. Optical cable

4. 10Gtek Fiber Media converter with multimode SX module.


Alienware R7 with Paul Pang V2 USB PCIE -> iFi Pro iDSD -> McIntosh MHA100 -> Hifiman Susvara. Keeping it simple!

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On 3/19/2019 at 4:05 PM, gordec said:

I'm thinking about setting up a bridge optical connection to my Pro iDSD DAC.

 

Right now my setup is Windows 10 PC -> Ethernet to Network switch -> network switch to Pro iDSD.

 

I'm thinking about getting a Mellanox Connectx2 card in bridge mode -> Optical fiber SFP cable -> Fiber Media Converter -> Ethernet cable to Pro iDSD.

 

This should work right? I haven't seen anyone trying to use a SFP 10G NIC and putting it into bridge mode. 

 

1. Mellanox Connectx2

2. Optical Module for Mellanox 

3. Optical cable

4. 10Gtek Fiber Media converter with multimode SX module.

 

I’d  recommend reducing variables first. 

 

The most important thing  is to get compatible SFP modules on each side of the connection. Some modules  are dual 10g/1g. Most SFP(+) ports will accept 1g SFP modules.


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I have my server configured with a network bridge. One copper cable goes to a Roon endpoint and the other goes by way of two FMCs to the LAN .

 

This has been working really well and adding the bridge was a big hit. Unfortunately in the course of tuning the network settings I seem to have stopped my ability to communicate across the fiber link. I am using suggestions that came with my new JCAT Femto NIC card. Among other tweaks it suggested unchecking all networking properties except "Internet Protocol Version 4". It also makes some changes under the bridged network adapter settings. Previously I had this working with my old Intel NIC which was bridged with my on-board port. Something has changed but I do not know what it is.

 

I was using the FMC's to isolate my audio "clean side" which the server is part of. For now I have to use a regular ethernet cable for this connection. If I hook up my laptop to the fiber connection as a test it links immediately.

 

Can anyone think of a setting or property or protocol that is essential for communication across two FMC's?



"Don't Believe Everything You Think"

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22 minutes ago, mourip said:

I have my server configured with a network bridge. One copper cable goes to a Roon endpoint and the other goes by way of two FMCs to the LAN .

 

This has been working really well and adding the bridge was a big hit. Unfortunately in the course of tuning the network settings I seem to have stopped my ability to communicate across the fiber link. I am using suggestions that came with my new JCAT Femto NIC card. Among other tweaks it suggested unchecking all networking properties except "Internet Protocol Version 4". It also makes some changes under the bridged network adapter settings. Previously I had this working with my old Intel NIC which was bridged with my on-board port. Something has changed but I do not know what it is.

 

I was using the FMC's to isolate my audio "clean side" which the server is part of. For now I have to use a regular ethernet cable for this connection. If I hook up my laptop to the fiber connection as a test it links immediately.

 

Can anyone think of a setting or property or protocol that is essential for communication across two FMC's?

Pull the FMC and run a wire to see what happens.  It will give you a faster route to find out where the problem actually is.

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1 hour ago, bobfa said:

Pull the FMC and run a wire to see what happens.  It will give you a faster route to find out where the problem actually is.

 

Thanks. That is what I have been doing since the FMC route failed.

 

Works fine with a regular ethernet cable and the FMCs work fine to my laptop, just not FMCs to server.



"Don't Believe Everything You Think"

System

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1 hour ago, mourip said:

 

Thanks. That is what I have been doing since the FMC route failed.

 

Works fine with a regular ethernet cable and the FMCs work fine to my laptop, just not FMCs to server.

Some FMCs don't support 100m, like my D-link one. I can only set the speed of my Nuc's network interface to 1000m to make it work with the FMC. 

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On 3/20/2019 at 7:05 AM, gordec said:

I'm thinking about setting up a bridge optical connection to my Pro iDSD DAC.

 

Right now my setup is Windows 10 PC -> Ethernet to Network switch -> network switch to Pro iDSD.

 

I'm thinking about getting a Mellanox Connectx2 card in bridge mode -> Optical fiber SFP cable -> Fiber Media Converter -> Ethernet cable to Pro iDSD.

 

This should work right? I haven't seen anyone trying to use a SFP 10G NIC and putting it into bridge mode. 

 

1. Mellanox Connectx2

2. Optical Module for Mellanox 

3. Optical cable

4. 10Gtek Fiber Media converter with multimode SX module.

 

I'd recommend considering Sonore's upcoming (not yet but soon to be released) opticalModule (their name for FMC). My recommendation is based on knowing it's designed by John Swenson.

 

I believe @vortecjr can recommend the compatible switch to use (featuring SFP port), so you may get away with just a single Sonore FMC? But JR will confirm / correct me if I'm wrong.

 

 

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7 hours ago, Oscarhuge said:

Some FMCs don't support 100m, like my D-link one. I can only set the speed of my Nuc's network interface to 1000m to make it work with the FMC. 

 

Thanks. I do have the link set to 1G.

 

Probably time to start rolling back my JCAT tweaks one by one!



"Don't Believe Everything You Think"

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