Chapter 2 Dhcp Server Configuration; Introduction To Dhcp Server; Usage Of Dhcp Server; Dhcp Address Pool - H3C S7500 Series Operation Manual

Operation Manual – DHCP
H3C S7500 Series Ethernet Switches

Chapter 2 DHCP Server Configuration

When configuring DHCP servers, go to these sections for information you are
interested in:

Introduction to DHCP Server

Global Address Pool-Based DHCP Server Configuration
Interface Address Pool-Based DHCP Server Configuration
DHCP Security Configuration
Displaying and Maintaining a DHCP Server
DHCP Server Configuration Example
Troubleshooting a DHCP Server
2.1 Introduction to DHCP Server

2.1.1 Usage of DHCP Server

Generally, DHCP servers are used in the following networks to assign IP addresses:
Large-sized networks, where manual configuration method bears heavy load
and is difficult to manage the whole network in a centralized way.
Networks where the number of available IP addresses is less than that of the
hosts. In this type of networks, IP addresses are not enough for all the hosts to
obtain a fixed IP address, and the number of on-line users is limited (such is the
case in an ISP network). In these networks, a great number of hosts must
dynamically obtain IP addresses through DHCP.
Networks where only a few hosts need fixed IP addresses and most hosts do not
need fixed IP addresses.

2.1.2 DHCP Address Pool

A DHCP address pool holds the IP addresses to be assigned to DHCP clients. When
a DHCP server receives a DHCP request from a DHCP client, it selects an address
pool depending on the configuration, picks an IP address from the pool and sends the
IP address and other related parameters (such as the IP address of the DNS server,
and the lease time of the IP address) to the DHCP client.
I. Types of address pools
The address pools of a DHCP server fall into two types: global address pool and
interface address pool.
A global address pool is created by executing the dhcp server ip-pool
command in system view. It is valid on the current device.
Chapter 2 DHCP Server Configuration
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