Dynamic Host Configuration Protocol (DHCP)-1

 

About DHCP:

The Dynamic Host Configuration Protocol (DHCP) is a network management protocol used on Internet Protocol (IP) networks for automatically assigning IP addresses and other communication parameters to devices connected to the network using a client–server architecture

Video Link : 

** DHCP works through DORA process

    D= Discover                        - - > Clients initiate this packet 

    O=Offer                               - - > Server initiate this packet 

    R=Request                          - - > Clients initiate this packet 

    A=Acknowledgement         - - > Server initiate this packet    

** Port Number >>  DHCP Client: 67  & DHCP Server: 68

                For better understanding please see below images:

Now, Let's go to configuration. First we see our Scenario from below image.

Our Purpose: All 4 devices are DHCP-Clients. They all will get IP address from Upper DHCP-Server automatically. But PC1 & Client-1 will get IP information of Network 10.1.1.0. File-Server & Client-2 will get IP information of Network 192.168.1.0

                                    DHCP Server Configuration                      

                          

DHCP-Server

DHCP-Server# conf t   DHCP-Server(config)#int f0/0 DHCP-Server(config-if)#ip add 10.1.1.1 255.255.255.0 DHCP-Server(config-if)#no sh   DHCP-Server(config-if)#int f1/0 DHCP-Server(config-if)#ip add 192.168.1.1 255.255.255.0 DHCP-Server(config-if)#no sh DHCP-Server(config-if)#exit   DHCP-Server(config)#ip dhcp pool 10-Net DHCP-Server(dhcp-config)#network 10.1.1.0 255.255.255.0 DHCP-Server(dhcp-config)#default-router 10.1.1.1 DHCP-Server(dhcp-config)#dns-server 8.8.8.8 DHCP-Server(dhcp-config)#exit   DHCP-Server(config)#ip dhcp pool 192-Net DHCP-Server(dhcp-config)#network 192.168.1.0 255.255.255.0 DHCP-Server(dhcp-config)#default-router 192.168.1.1 DHCP-Server(dhcp-config)#dns-server 4.4.2.2 DHCP-Server(dhcp-config)#exit DHCP-Server(config)#exit   DHCP-Server# copy running-config startup-config

Real Configuration into Server

 

Client’s Configuration for getting IP information from DHCP Server

                                                 

 Real Configuration into Clients

PC-1 & Client-1  are getting IP from 10.1.1.0 Network

File-Server & Client-2 are getting IP from 192.168.1.0 Network

If you use PC of Cisco Packet Tracer, You will get IP by selecting "DHCP" option.

                        

If you use Physical PC like Windows-10, You will get IP by selecting "Automatically" option.

Now, We will some extra work into DHCP server. For this please go to next part:

Next Part: 

https://itbd-training.blogspot.com/2021/08/dynamic-host-configuration-protocol.html