Dhcp O; Introduction To Dhcp; Dhcp Ip Address Assignment - 3Com 7757 Configuration Manual

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DHCP IP Address

IP Address Assignment

DHCP O

With networks getting larger in size and more complicated in structure, lack of

available IP addresses becomes the common situation the network administrators

have to face, and network configuration becomes a tough task for the network

administrators. With the emerging of wireless networks and the using of laptops,

the position change of hosts and frequent change of IP addresses also require new

technology. Dynamic host configuration protocol (DHCP) is developed in this

DHCP adopts a client/server model, where DHCP clients send requests to DHCP

servers for configuration parameters; and the DHCP servers return the

corresponding configuration information such as IP addresses to configure IP

addresses dynamically.

A typical DHCP application includes one DHCP server and multiple clients (such as

PCs and laptops), as shown in Figure 152.

Figure 152 Typical DHCP application

Currently, DHCP provides the following three IP address assignment policies to

meet the requirements of different clients:

Manual assignment. The administrator statically binds IP addresses to few

clients with special uses (such as WWW server). Then the DHCP server assigns

these fixed IP addresses to the clients.

Automatic assignment. The DHCP server assigns IP addresses to DHCP clients.

The IP addresses will be occupied by the DHCP clients permanently.

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