DHCP网络服务

/etc/resolv.conf 文件

主配置文件：/etc/dhcp/dhcpd.conf

执行程序：/usr/sbin/dhcpd、/usr/sbin/dhcrelay

服务脚本：/etc/init.d/dhcpd、/etc/init.d/dhcrelay

执行参数配置：/etc/sysconfig/dhcpd

DHCP中继配置：/etc/sysconfig/dhcrelay

DHCP

/etc/dhcp/dhcpd.conf

全局设置，作用于整个DHCP服务器

ddns -update-style  none;

default-lease-time 21600;

max-lease-time  43200;

option domain-name "domain.org";

option domain-name-servers 202.106.0.20;

Subnet网络声明，作用于整个子网段

  range参数：设置用于分配的ip地址

  option subnet-mask 参数:  设置客户机的子网掩码

  option routers 参数：设置客户机的默认网关地址

subnet 192.168.4.0 netmask 255.255.255.0{

    range 192.168.4.128  192.168.4.254;

    option subnet-mask     255.255.255.0;

    option routers  192.168.4.1

}

host主机声明，作用于单个主机

    hardware ethernet 参数：指定对应主机的MAC地址

    fixed-address 参数：指定为该主机

host prtsvr{

  hardware ethernet 00:v0:77:44;

  fixed-address 192.168.4.100

}

启动DHCP服务

netstat -anpu | grep :67

查看租约文件  

 /var/lib/dhcpd/dhcpd.leases 

使用方式

1、修改网卡配置文件

2、使用dhclient命令

    dhclient -d eth0 

ddns-update-style none;

default-lease-time 21600;

max-lease-time 43200;

option domain-name "domain.org";

option domain-name-servers 202.106.0.20;

subnet 192.168.111.0 netmask 255.255.255.0 {

range 192.168.111.10 192.168.111.253;

option subnet-mask 255.255.255.0;

option routers 192.168.111.1;

# host prtsvr {

# hardware ethernet 00:0C:29:E7:64:E8;

#: fixed-address 192.168.111.100;

# }

}

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