You are the network administrator for a large bagel manufact

You are the network administrator for a large bagel manufacture that has 32 bakeries located throughout the United States, United Kingdom, and Switzerland. Your company wants to move to a DHCP network design unsing private IP addresses. Each bakery consists of only three computers, but all the bakeries communicate with the corporate headquarters in Yonkers, New York. Design a IPv4 DHCP solution for these locations.

Solution

As You have mentioned that We need to have a Private IP address network

So let us first understand the range of Private addresses.

10.0.0.0 - 10.255.255.255

172.16.0.0- 172.31.255.255

198.128.0.0- 198.168.255.255 excluding APIPA addresses.

Also understand few basic terms of DHCP Server

Status: It needs to be enabled , it is just a service to start or stop

DHCP Lease Time: It is the time period after DHCP Server changes IP Addresses

DHCP always Broadcast : We need to keep it enabled so it will always broadcast IP addresses

Reserve IP: The IP addresses that remain static

Let us take the example from first one i.e 10.0.0.0 -10.255.255.255.

Firstly We need to assign an IP address to DHCP server.

Let us keep DHCP Server IP: 10.0.0.1

Now as we need 96 Host IP addresses , We will assign a range from 10.0.0.2- 10.0.0.150.

The DHCP IP address range is :10.0.0.2- 10.0.0.150

So all the 96 Hosts will be taking the IP addresses from this range

I have kept some extra IP addresses as we might need to connect it to external network via a Router.

So we will have to assign an IP for that Router.

Or We may use some peripheral devices like Printers in those Offices.We can set a lease time as well so that IP address of these computers will change after the lease will expire.

Note: I am using a simpler network to understand it better as number of Hosts directly depend on per network

We assumed here a single network.

One more thing that we need to keep in mind it We cannot afford an IP for Printer or Router that changes after certain amount of time (Lease period or some issues like reboot of the device).

So for those devices we are keeping under Reserve IP

And keep those IP addresses in Reserve IP in DHCP server.