Before you can successfully configure a network for DHCP, you need to know the physical and logical layout
of the network.
If you are fortunate, this information
- has already been recorded,
- is kept up-to-date, and
- you can actually find the necessary documentation.
If so, immediately track down the responsible administrator to obtain this information.
If you are not so fortunate, grab a pen and notepad and start walking through the network.
Make note of every hub or switch and how many devices are plugged into each.
Work your way toward the server closet and record the number of routers or LAN router interfaces. Find the locations of any
- DNS servers,
- WINS servers, and
- any other servers that may require static addresses.
When you are finished, create a diagram of your results.
Next, determine which IP addressing scheme
, if any, is currently in use on the network and add it to your sketch.
If you are responsible for creating the addressing scheme, you will most likely be using one of the private range addresses: