Posted on 2005-03-08
I am trying to figure out what the best and most manageable ip address scheme for our company network. I am shooting for simplicity! Currently, we have a flat network of 15 servers, 4 switches/routers and about 80 workstations. Our enduser growth grows on average 10 a year so it's minimal.
Now, if I use the RFC 1918 standard of 192.168.0.0 255.255.255.0 that will yield me 254 useable ip addresses without subnetting. If I use 192.168.0.0/16 or 255.255.0.0 I would have over 65k useable ip addresses. Can someone help me to understand why I would pick one scheme over another? I mean if everything is private and non-routable then why would I bother subnetting when I can just give myself 65k right off the bat?
Now what I have heard from most people is to use the 192.168.0.0/24 scheme since 254 addresses, which at the moment, is more then enough to supply our network. However, I am implementing two DHCP servers for fault tolerance and will excersize the 50/50 rule. So my scope would be 192.168.0.51-152 for dhcp server 1 and 192.168.0.153-254 for dhcp server 2. It would seem that I will be short changing myself of fault-tolerant dhcp addresses in the next few years!