When to split up a LAN? And IP Addressing schemes
Posted on 2012-03-23
We've got a mid-sized office using a standard 192.168.150.xxx class C network all running on gigabit switches. It has about 80 PC's & Macs. Plus another 40 wireless devices like phones, tablets etc, that connect to the network. Add to that VPN users, servers etc and we are approaching 200 devices needing IP's and need to plan for growth.
We will shortly be moving to a new building and it seems like a good time to think about at least changing IP ranges to something with more room to grow, like a class B network.
My first question is how many PC's is too many on a network? At what point should we start thinking about splitting the LAN up into VLANs? At this point it’s a pretty small network and I'd just assume not add the complexity.
Next, any recommendations on IP address schemes? I’m thinking of something like a class B 10.1.X.X. Then just for organization doing something like network gear gets 10.1.10.x, workstations / DHCP get 10.1.20.x, VPN gets 10.1.30.x etc. Again all class B on the same network, just using that third octet to sort different types of devices. Any thoughts?
Thanks for any comments.