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I'm re-doing a small company's IP scheme / netdesign for their LAN. They are growing fast, with many branch offices opening soon.

It's a mostly flat 192.168.1.x/24-ish out-of-the-box network. There is only one printer, one internal server, and most storage at a hosting company. Normally, I would pick an obscure part of 172 to avoid VPN problems, overlapping networks, tricky routing, overall security, etc. This is one of those 'Planning for growth' things - just like running dual Cat6/5e to all the desks, and separate electrical circuits where possible.

However, due to the rise in cloud computing and offsite DCs, as time progresses, I do not forsee ever serving much from this network, or more servers living here (beyond the odd VPN appliance or WAN accelerator). Number crunching will be done by virtual machines, on data that is hosted/stored on other virtual machines. Site-to-Sites become less useful with central hosted storage.

This is mind, what, if any, concerns might completely hosted company have ? VoIP gets its own separate WAN link, switching & wiring, and devices, with PBXs at a DC as well.

Is the network engineer outside of the DC really necessary anymore ;)

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closed as not constructive by Renan, Diogo, 8088, Journeyman Geek, studiohack Jul 24 '12 at 0:09

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance.If this question can be reworded to fit the rules in the help center, please edit the question.

You have my condolences for your question being summarily closed without so much as a note about why or what your options are for getting the information you need. – Synetech Jul 24 '12 at 1:21