Network infrastructure upgrade - Possible new fiber backbone
We're thinking of improving some of the backbone links for our network. Currently all building to building links are via standard cat 5. Not exactly "by the book", but it's worked well for over 5 years running at 1 GigE.
We're thinking of replacing these with fiber, however I've never worked with fiber and I'm not sure of the most efficient network layout or most cost effective method of installation. The attached pdf shows all of our current switches and links.
As you can see from the diagram switch C is our 'central switch', a procurve 1800-24. Would replacing links C-E , C-B and C-A with fiber be best? Or just running a single 10gbps fiber link and creating a second 'core switch' for the building on the right? (Ignore C-F, it's non-critical)
As for installation, a pull through exists between the core switch and the building on the right. Is a in house install viable or can anyone recommend good companies in the Dorset area for quotes?
Also, would we need different switches? The procurves have modules to support fiber, but possibly not enough for our core switch to support multiple fibers.
Any advice on how others would tackle this would be great!