Build DHCP service to dynamically assign IP addresses

Service Introduction

DHCP Service Overview:

Name: dhcp-dynamichost Configuration Protocol Dynamic Host Configuration Protocol

Features: DHCP (Dynamic Host configuration Protocol. dll ) is a local area network protocol that uses UDP the work of the agreement, mainly has two uses:

1 , automatically assigned to an internal network or network service provider IP address, host name, DNS server, domain name

2 , matching and other services to achieve integrated management functions. Such as: Unattended Installation Server

3 , Features: C/S Mode Client / service side

DHCP Service usage: Port ( Bootps) (BOOTPC) .

the is the service side the is the client

Application Case List

company has 60 computer, ip address segment is 192.168.20.1-192.168.20.254 255.255.255.0 192.168.20.1 ,

Now there's a Span style= "FONT-SIZE:11PX;" >DHCP server address is 192.168.20.63, Now you need to assign to the rest of the computer dynamically. ip address, address range 192.168.20.100-192.168.20.200 ip address is 192.168.10.88 for reserved use.

Experimental simulation

Dhcp Server localhost.cn.cn:192.168.10.63 virtual machine nic: Vmnet1

Client localhost1.cn. : Employee Pending Assignment

Client localhost2.cn : Boss 192.168.20.88

Configure DHCP

Installation

[[email protected] ~]# yum-y install DHCP Install packages

To view the ports used by DHCP

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Configuration file Location :

/etc/dhcp/dhcpd.conf

when DHCP when the main package is installed, the template file for the master profile is automatically generated

/usr/share/doc/dhcp-4.1.1/dhcpd.conf.sample

and in / etc The directory will create a blank dhcpd.conf master configuration file.

Ls/etc/dhcp/dhcpd.conf

Copy the template configuration file to / etc replace blank under directory dhcpd.conf master configuration file.

[email protected] ~]# Cp/etc/dhcp/dhcpd.conf/etc/dhcp/dhcpd.conf.bak backup files before copying

[Email protected] ~]# cp/usr/share/doc/dhcp-4.1.1/dhcpd.conf.sample/etc/dhcp/dhcpd.conf

CP : whether to overwrite "/etc/dhcp/dhcpd.conf" ? y

Get localhost2.cn of the MAC Address

HWaddr 00:0c:29:35:18:4a

[[Email protected]~]# vim/etc/dhcp/dhcpd.conf Modifying a configuration file

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[Email protected] ~]#/ETC/INIT.D/DHCPD restart

starting dhcpd: [ failed ]

Solutions

1. The first time the virtual machine NIC mode uses the Vmnet1 , modify it to Vmnet4 Mode

2. modify its corresponding settings ( etc/dhcp/dhcpd.conf )

[[Email protected]~]#/etc/init.d/dhcpd Start

starting dhcpd: [ OK ]

Configuring the Client

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Build DHCP service to dynamically assign IP addresses