Subnetting in Packet Tracer - morgan-hanrahan/Tech-Journal GitHub Wiki

Summary

In this lab, we worked to create equal-sized subnets. To do this we first calculate the total number of addresses, then we divide groups of equal size where the total number of addresses is a power of 2. Then you take the log of the total number of addresses divided by the group size. This will give you the new subnet mask and you can find the subnets normally after that.

Helpful Info

If you must support X equal-sized subnets, you are going to need additional bits in your subnet ID. For example, if you are creating 4 equal-sized subnets, you'll need 2 additional bits.