dhcp服务搭建

Dhcp服务

动态主机设置协议(Dynamic Host Configuration Protocol, DHCP)是一个局域网的网络协议，使用UDP协议工作，主要有两个用途：给内部网络或网络服务供应商自动分配IP地址给用户给内部网络管理员作为对所有计算机作中央管理的手段。

给局域网内自动分配地址

1、查看Dhcp服务其配置

[root@localhost ~]# yum install dhcp -y

Loaded plugins: langpacks, product-id, search-disabled-repos, subscription-manager

This system is not registered with an entitlement server. You can use subscription-manager to register.

Resolving Dependencies

–> Running transaction check

—> Package dhcp.x86_64 12:4.2.5-58.el7 will be installed

–> Finished Dependency Resolution

Dependencies Resolved

**Package Arch Version Repository Size

**

Installing:

dhcp x86_64 12:4.2.5-58.el7 base 513 k

**Transaction Summary

**

Install 1 Package

Total download size: 513 k

Installed size: 1.4 M

Downloading packages:

Running transaction check

Running transaction test

Transaction test succeeded

Running transaction

Installing : 12:dhcp-4.2.5-58.el7.x86_64 1/1

Verifying : 12:dhcp-4.2.5-58.el7.x86_64 1/1

Installed:

dhcp.x86_64 12:4.2.5-58.el7

Complete!

2、查看配置文件

[root@localhost ~]# rpm -ql dhcp

/etc/NetworkManager

/etc/NetworkManager/dispatcher.d

/etc/NetworkManager/dispatcher.d/12-dhcpd

/etc/dhcp/dhcpd.conf

/etc/dhcp/dhcpd6.conf

/etc/dhcp/scripts

/etc/dhcp/scripts/README.scripts

/etc/openldap/schema/dhcp.schema

/etc/sysconfig/dhcpd

/usr/bin/omshell

/usr/lib/systemd/system/dhcpd.service

/usr/lib/systemd/system/dhcpd6.service

/usr/lib/systemd/system/dhcrelay.service

/usr/sbin/dhcpd

/usr/sbin/dhcrelay

/usr/share/doc/dhcp-4.2.5

/usr/share/doc/dhcp-4.2.5/dhcpd.conf.example

/usr/share/doc/dhcp-4.2.5/dhcpd6.conf.example

/usr/share/doc/dhcp-4.2.5/ldap

/usr/share/doc/dhcp-4.2.5/ldap/README.ldap

/usr/share/doc/dhcp-4.2.5/ldap/dhcp.schema

/usr/share/doc/dhcp-4.2.5/ldap/dhcpd-conf-to-ldap

/usr/share/man/man1/omshell.1.gz

/usr/share/man/man5/dhcpd.conf.5.gz

/usr/share/man/man5/dhcpd.leases.5.gz

/usr/share/man/man8/dhcpd.8.gz

/usr/share/man/man8/dhcrelay.8.gz

/usr/share/systemtap/tapset/dhcpd.stp

/var/lib/dhcpd

/var/lib/dhcpd/dhcpd.leases

/var/lib/dhcpd/dhcpd6.leases

这里写图片描述

3、单网段配置：

[root@localhost ~]# vim /etc/dhcp/dhcpd.conf

DHCP Server Configuration file.

# see /usr/share/doc/dhcp*/dhcpd.conf.example

# see dhcpd.conf(5) man page

ddns-update-style interim; ###定义所支持的DNS动态更新类型,表示DNS互动更新模式

ignore client-updates; #####忽略客户机的DNS更新记录

subnet 172.16.50.0 netmask 255.255.255.0 {

option routers 172.16.50.1;

option subnet-mask 255.255.255.0;

option domain-name-servers 114.114.114.114;

range dynamic-bootp 172.16.50.100 172.16.50.254;

default-lease-time 60;

max-lease-time 60;

}