For this first article, we will see how to set up a DHCP service on Cisco routers.
DHCP Service (Dynamic Host Configuration Protocol) allows users to obtain IP configuration automatically.
The DHCP service is often coupled with DNS service on a dedicated server. However, it is possible to activate it on a router for a small network.
An configuration has an IP address, its subnet mask and others options. Forty of them are configurable such as the default gateway, DNS servers, domain name and WINS server.
A client has a configuration during a specified time, we call it: the lease.
Note : DHCP uses broadcast to communicate, which means that the client’s request can’t cross a router (except explicit command).
