Fibre/Switch questions

[Bakedgoods]

What precuations and measures should be taken when there is a fibre line running near a lake? Sheilding etc? Is this generally expensive?

If i'm laying a fibre cable 800m long should I opt for single mode? It's a simple link between switches on a relatively small network so only two cores should be needed (as I understand it, one for send and one for receive?).

Can anyone recommend any Cisco switches that support both multimode and single mode fibre connections and have 24 standard ethernet ports?

Thanks for any help

 

[Bakedgoods]

I'm sorry but no

I've tried googling for information about sheilding and common practices but I was hoping someone had real world experience.

 

[Bakedgoods]

Thanks!

It's not essential but preferable since they are pretty much standard as i'm sure you're well aware.

The fibre will run underground. Can't decide if I should use single or multimode, I originally thought single but i'm unsure if there's a need.

- Retarded question here, but what are the little media converter fibre ports you can place into a switch so you can connect fibre to it called?

 

[Bakedgoods]

I thought that would be the best option thanks.

I'll be using multimode for linking any switches that are in the same cabinet/close proximity though.

There isn't really any need for the bandwidth that 12 core would give (I am right in thinking 6 send, 6 receive yes?). I'll need to start thinking about using fibre panels if I use that many cores won't I?

The reason I say that is because I don't want to have to use a completely different switch just for fibre.

The fibre link i'm talking about will be from a distribution switch to a core switch.

All the links (switch to switch in same cabinet, switch to router, router to router) will be done using multimode, any over long distance (outside) will be using single mode.

Does that make sense?

Thanks for your help

 

[Bakedgoods]

If you use a fibre patch panel and say have an 8 core single mode going into it, when you patch to the switch it will require you to use 8 patch panel ports and 8 ports on the switch yes?

I'm guessing from patch panel to switch I would use multimode rather than single mode though? So it would be single mode outside through some ducts into a patch panel, then multimode from PP to switch?

I don't suppose you have any sites I can reference for the bandwidth you get from using say 4 cores, 6 cores etc. I'm struggling :/

If I show you my topology diagram will that help? I'm new to this and only learning so it's all very appreciated.