dhcp

dhcp伺服器設定ip：

[root@localhost ~]# vim /etc/sysconfig/network-scripts/ifcfg-eth0

IPADDR=172.17.17.2

NETMASK=255.255.255.0

GATEWAY=172.17.17.1

[root@localhost ~]# service network restart

正在關閉接口 eth0： [确定]

關閉環回接口： [确定]

彈出環回接口： [确定]

彈出界面 eth0： [确定]

[root@localhost ~]# ifconfig eth0

安裝DHCP：

[root@localhost ~]# mount /dev/cdrom /mnt

mount: block device /dev/cdrom is write-protected, mounting read-only

[root@localhost ~]# yum install dhcp*

主配置檔案：

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

[root@localhost ~]# cp /usr/share/doc/dhcp-3.0.5/dhcpd.conf.sample /etc/dhc

dhclient-eth0.conf dhcp6s.conf

dhcp6c.conf dhcpd.conf

[root@localhost ~]# cp /usr/share/doc/dhcp-3.0.5/dhcpd.conf.sample /etc/dhcpd.conf

cp：是否覆寫“/etc/dhcpd.conf”? y

ddns-update-style interim;

ignore client-updates;

subnet 172.17.17.0 netmask 255.255.255.0 {

# --- default gateway

option routers 172.17.17.1;

option subnet-mask 255.255.255.0;

option nis-domain "domain.org";

option domain-name "domain.org";

option domain-name-servers 192.168.1.1;

option time-offset -18000; # Eastern Standard Time

range dynamic-bootp 172.17.17.1 172.17.17.100;

default-lease-time 21600;

max-lease-time 43200;

啟動dhcp：[root@localhost ~]# service dhcpd start

啟動 dhcpd： [确定]

[root@localhost ~]#

中繼代理的設定

設定ip：

eth0: 172.17.17.17.1 255.255.255.0

eth1: 192.168.1.1 255.255.255.0

eth2: 192.168.2.1 255.255.255.0

service network restart

安裝dhcp：

配置檔案：

[root@localhost ~]#vim /etc/sysconfig/dhcrelay

INTERFACES="eth0 eth1 eth2"

DHCPSERVERS="172.17.17.2"

啟動dhcrelay：

[root@localhost ~]#service dhcrelay start

啟動 dhcrelay [确定]

設定ip轉發：

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

# Controls IP packet forwarding

net.ipv4.ip_forward = 1

[root@localhost ~]# sysctl -p

用戶端測試：

[root@localhost ~]# dhclient eth0

Internet Systems Consortium DHCP Client V3.0.5-RedHat

Copyright 2004-2006 Internet Systems Consortium.

All rights reserved.

For info, please visit http://www.isc.org/sw/dhcp/

Listening on LPF/eth0/00:0c:29:0a:35:35

Sending on LPF/eth0/00:0c:29:0a:35:35

Sending on Socket/fallback

DHCPDISCOVER on eth0 to 255.255.255.255 port 67 interval 7

DHCPOFFER from 172.17.17.2

DHCPREQUEST on eth0 to 255.255.255.255 port 67

DHCPACK from 172.17.17.2

bound to 172.17.17.99-- renewal in 10526 seconds.