Operation Manual – DHCPH3C S7500 Series Ethernet Switches Chapter 1 DHCP Overview1-1Chapter 1 DHCP OverviewWhen configuring DHCP, go to these sections for information you are interested in:z Introduction to DHCPz DHCP IP Address Assignmentz DHCP Packet Formatz DHCP Packet Processing Modesz Protocols and Standards1.1 Introduction to DHCPWith networks getting larger in size and more complicated in structure, lack ofavailable IP addresses becomes the common situation the network administratorshave to face, and network configuration becomes a tough task for the networkadministrators. With the emerging of wireless networks and the using of laptops, theposition change of hosts and frequent change of IP addresses also require newtechnology. Dynamic host configuration protocol (DHCP) is developed in thisbackground.DHCP adopts a client/server model, where DHCP clients send requests to DHCPservers for configuration parameters; and the DHCP servers return the correspondingconfiguration information such as IP addresses to configure IP addressesdynamically.A typical DHCP application includes one DHCP server and multiple clients (such asPCs and laptops), as shown in Figure 1-1.DHCP client DHCP clieDHCP client DHCntP clientDHCP serverFigure 1-1 Typical DHCP application
