H3C S3600 Series Operation Manual

Also see for H3C S3600 Series: Datasheet Installation manual Command manual Operation manual Command manual

Contents

H3C S3600 Series Operation Manual Manual pdf 3 page image

Operation Manual – DHCPH3C S3600 Series Ethernet Switches-Release 1510 Chapter 1 DHCP Overview1-1Chapter 1 DHCP Overview1.1 Introduction to DHCPWith networks getting larger in size and more complicated in structure, lack of availableIP addresses becomes the common situation the network administrators have to face,and network configuration becomes a tough task for the network administrators. Withthe emerging of wireless networks and the using of laptops, the position change ofhosts and frequent change of IP addresses also require new technology. Dynamic hostconfiguration protocol (DHCP) is developed in this background.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 addresses dynamically.A typical DHCP application includes one DHCP server and multiple clients (such asPCs and laptops), as shown in Figure 1-1.LANDHCP ServerDHCP Client DHCP ClDHCP Client DHCPientClientFigure 1-1 Typical DHCP application1.2 DHCP IP Address Assignment1.2.1 IP Address Assignment PolicyCurrently, DHCP provides the following three IP address assignment policies to meetthe requirements of different clients:z Manual assignment. The administrator statically binds IP addresses to few clientswith special uses (such as WWW server). Then the DHCP server assigns thesefixed IP addresses to the clients.z Automatic assignment. The DHCP server assigns IP addresses to DHCP clients.The IP addresses will be occupied by the DHCP clients permanently.