We have outgrown our network. We are ready to replace the router so I thought this would be a good time to expand the network. I've configured plenty of /24 networks but never anything bigger. My first thought was to go with a Then I could do stuff like DHCP for workstations, for servers, for printers etc. I imaging this would work but I'd have most of the 3rd octet unused.

I suppose a better way to do this would be a Then I'd do DHCP for workstations, - for servers, - for printers etc. Now my hosts would only be 2*256 but still plenty of room.

Am I on the right track or way off?

1 Answer 1


You can use any subnet from the RFC 1918 ranges -,, - with any subnetting, including,, and

I'd recommend using at most a /23 prefix - larger than that should be subnetted and routed in between (e.g. with a decent L3 switch).

While you're reorganizing your network, you should consider defining multiple security zones, each consisting of one of more IP subnets/VLANs. The router(s) in between allow you to control traffic between zones, as required by your security needs.

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.