Help with reconfiguration of a /16 LAN

I inherited a Class B network years ago and am just now wanting to do a major overhaul.  Currently the LAN network is  It is currently just a flat network with servers and clients dispersed throughout.  I want to segment the network into the following categories: Servers (25ea now), Workstations (100ea now), Printers (30ea now), Utility devices (20ea now).  All of our wireless clients are connected on the outside of the firewall and are outside the scope of this question.  Our firewall is a WatchGuard device.

Should I rework the ip address scheme?  If so, can someone layout an example of what I should do?

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Ken BooneNetwork ConsultantCommented:
So I would move to a 10.10.x.0/24 network scheme is servers is user PCs is printers is utility devices

You can also likewise put servers on vlan 10, PCs on vlan 20, etc..  You get the idea.  This is just a sample.  With this setup you can migrate one part at a time.
I would agree with Ken, if that's really how you want to break it down. Depending on how your office is laid out, you might decide to do by floor instead of by type of device, but use a similar addressing scheme to what Ken proposed. When you say wireless, did you mean for internal users or guests?
Paul MacDonaldDirector, Information SystemsCommented:
To riff off what Ken posted, you can "reserve" some bits in case any segment grows beyond the 254 nodes a /24 mask allows.  So instead of... is servers is user PCs is printers is utility devices could do... is servers is user PCs is printers is utility devices

...which would let you use a /23 or /22 mask at some point in the future, which would let you have 510 or 1022 nodes on each subnet and the only thing you'd have to change is the mask.   Other values in the third octet could be used as well (8, 20, 56, 120  would leave room for a /21 mask and 2046 nodes per subnet, etc).  If you're not expecting significant growth it may not matter, but it may be something you want to plan for.
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