centos6.6-------DHCP服務配置

一、為一個單一的網段提供地址服務

軟件包：  dhcp
配置文件：  /etc/dhcp/dhcpd.conf
租約文件：     /var/lib/dhcpd/dhcpd.leases
監聽端口：     67/udp
客戶端租約文件：/var/lib/dhclient/dhclient-eth1.leases

網卡網段必須和DHCP分配的網段匹配

1。服務端配置

[root@Server dhcp]# vim dhcpd.conf 
# A slightly different configuration for an internal subnet.
subnet 192.168.137.0 netmask 255.255.255.0 {     //subnet 網段  netmask 子網掩碼
  range 192.168.137.1 192.168.137.5; //ip地址池
  option routers 192.168.137.1;   //網關
  default-lease-time 600;   //默認租約時間
  max-lease-time 7200;   //最大租約時間
}

[root@Server ~]# /etc/init.d/dhcpd restart
正在啟動 dhcpd：                                           [確定]

2。客戶端

[root@Client2 ~]# service network restart
關閉環回接口：                                             [確定]
彈出環回接口：                                             [確定]
彈出界面 eth0： 活躍連接狀態：激活中
活躍連接路徑：/org/freedesktop/NetworkManager/ActiveConnection/4
狀態：激活中
狀態：激活的
連接被激活
                                                           [確定]

[root@Client ~]# ifconfig
eth1      Link encap:Ethernet  HWaddr 00:0C:29:F5:7C:30 
          inet addr:192.168.137.1  Bcast:192.168.137.255  Mask:255.255.255.0
          inet6 addr: fe80::20c:29ff:fef5:7c30/64 Scope:Link
          UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
          RX packets:11315 errors:0 dropped:0 overruns:0 frame:0
          TX packets:1234 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:1000
          RX bytes:10269732 (9.7 MiB)  TX bytes:129859 (126.8 KiB)

lo        Link encap:Local Loopback 
          inet addr:127.0.0.1  Mask:255.0.0.0
          inet6 addr: ::1/128 Scope:Host
          UP LOOPBACK RUNNING  MTU:65536  Metric:1
          RX packets:4 errors:0 dropped:0 overruns:0 frame:0
          TX packets:4 errors:0 dropped:0 overruns:0 carrier:0
          collisions:0 txqueuelen:0
          RX bytes:352 (352.0 b)  TX bytes:352 (352.0 b)

二、指定靜態IP

在/etc/dhcp/dhcpd.conf配置文件里寫入如下第二段代碼

subnet 192.168.137.0 netmask 255.255.255.0 {
        range 192.168.137.1 192.168.137.5;
        option routers 192.168.137.1;
        default-lease-time 600;
        max-lease-time 7200;
host Client {
        hardware ethernet 00:0C:29:F5:7C:30;   //找到所要指定網卡物理地址 fixed-address 192.168.137.2;           //指定ip }

 

[root@Client ~]# service network restart

[root@Client ~]# ip a s eth1
2: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 00:0c:29:f5:7c:30 brd ff:ff:ff:ff:ff:ff
    inet 192.168.137.2/24 brd 192.168.137.255 scope global eth1
    inet6 fe80::20c:29ff:fef5:7c30/64 scope link 
       valid_lft forever preferred_lft forever
[root@Client ~]# 

三、為多個網段提供ip