Questions - Connect 2 switches with optical fibre

[Mike1983]

Hello

I have many no doubt basic questions I was hoping some experts could assist with please?

If I wanted to connect 2x switches together using optical fibre, am I going along the correct path in thinking the following could be used??

2x D-Link DGS1210-24 as pasted HERE
2x SFP modules (1 per switch) as pasted HERE
1x run of OM2 50/125 fibre, pre-terminated with "LC" connectors as pasted HERE


If the above is correct I also have the following follow up questions

1) I've noted the SFP modules have two "sockets" per module. Am I correct in thinking this is the "duplex" functionality and both sockets need interconnecting between each switch?
2) For my proposed OM2 cable, if I was to order "4 core" cable, does that mean it will enable 2x pairs of switches (2x cores per switch connection) to be connected or 4x pairs of switches (1x core per switch connection) to be connected given my question above?

For clarity, I wish to have the connections between the switches rated at 1Gig for the time being with future capacity for 10Gig expansion without renewing the cable.

Finally, my proposed architecture is as follows

Main network switch > Cat6 > Switch 1 > fibre > Switch 2 > Cat 6 connections to devices

Any issue with the above??

Thank you for your time,

Mike

 

[oli356]

The switch is only 1Gig capable and not ten gig. The sfp module would have to also be a 10Gig.

As for the sockets on the SFP, one is for TX and the other is RX. The LC connector will fit that SFP. I'm not sure about the fibre cable itself though and your questions regarding that.

 

[Caged]

You match the cable with the transceivers - OM is multimode, OS is single-mode. Very generally, single-mode goes a long way, multimode uses cheaper surface-emitting lasers and will do half a kilometre or so. Multimode optics are cheaper and more common when stacking switches.

You need a pair of fibres to make a connection, an SFP module will have a TX and an RX socket so one SFP per switch is all that is required. Don't forget to cross over the TX and RX on whatever fibre cable you have made up.

 

[bledd]

You need sfp+ for 10gb, which costs a fortune compared to sfp. The switch and modules would need to be sfp+

With sfp, you could create a 2gb trunk. This means using 2x 1gb sfp links, then telling both switches that the ports are paired together.

This would double the throughput between the switches off there are multiple concurrent connections.

 

[Mike1983]

Thank you for the replies,

So I've been doing research lately and pretty confident I'm going to run fibre instead of copper for my project. I do still however have some basic questions below I was hoping you knowledgable guys may be able to answer?

1) Fibre patch panels - I'm intending on buying pre-terminated SWA OM3 fibre with LC connectors (as the SFP modules have LC connectors). If I were to buy an LC patch panel, am I correct in assuming the the LC connectors on the pre-terminated cable just plug straight into the internal side sockets of the patch panel with no fuss?

2) How much depth is normally needed for a fibre patch panel? I'm hoping a 450mm deep cabinet is sufficient?

3) Patching - If I get a patch panel with 2x separate cables terminated (say ports 1>4 are for cable 1 and ports 5>8 are for cable 2), am I correct in thinking I can just get an LC to LC patch cable and connect cores 2 & 5 together? This to enable the architecture below

* Switch (SFP) housed in building X connected to cable 1, port 2 of building Y
* LC to LC connector connecting port 2 to 5 in building Y
* Another switch in building Z on the other end of the cable core connected to port 5 in building Y
* The above is to ultimately allow a connection between a switch in building X to a switch in building Z using an intermediate patch panel in building Y.

Will the patch cable enable this without major transmission loss or will I need some intermediate active equipment?

I'm guessing this is the whole point of patching (as with copper) but I'm unfamiliar with fibre!

Sorry for the basic questions but this is my first experience of fibre and treating this as a learning experience as well as enabling my project (extending my network to two additional outbuildings)

Thank you for your time,

Mike