Operation Manual – DHCP
H3C S5500-EI Series Ethernet Switches
Chapter 1 DHCP Overview
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Chapter 1 DHCP Overview
When configuring ARP, go to these sections for information you are interested in:
z
Introduction to DHCP
z
DHCP Address Allocation
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DHCP Message Format
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DHCP Options
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Protocols and Standards
1.1 Introduction to DHCP
The fast expansion and growing complexity of networks result in scarce IP addresses
assignable to hosts. Meanwhile, with the wide application of wireless networks, the
frequent movement of laptops across networks requires that the IP addresses be
changed accordingly. Therefore, related configurations on hosts become more
complex. Dynamic Host Configuration Protocol (DHCP) was introduced to solve these
problems.
DHCP is built on a client-server model, in which the client sends a configuration request
and then the server returns a reply to send configuration parameters such as an IP
address to the client.
A typical DHCP application, as shown in
Figure 1-1
, includes a DHCP server and
multiple clients (PCs and laptops).
Figure 1-1
A typical DHCP application
