Engineering a new LAN IP Structure
Posted on 2011-04-27
I am looking at redesigning our private LAN ip structure. We have 26 sites and the subnets are arranged as 192.168.0.0/24. We have from 192.168.0.X - 192.168.26.X subnets.
We have approx. 100 - 150 devices on each subnet. I was thinking of introducing a CLASS A network.
So 10.0.0.0/8. The reason? I can use the second octet as a SITE ID, Third Octet as a CATEGORY ID (eg, servers, wireless, laptops, printers etc etc) and the fourth octet is range 1 - 254 for the devices themselves.
Now I like this as a clear identifier of subnets, eg, a wireless device isnt working on 10.151.60.1/8, I know this is site Silicon Valley(151), Wireless Device (60).
However, I am concerned that CLASS A is too large for only 150 devices or so in each subnet, is it overkill? What are the downsides of this in a technical level? Should I pursue a CLASS B instead? I am assuming that over the next 3 years we will grow by double, in which CLASS C will not be a viable subnet range.