0.软件包dhcp #yum install dhcp -y
1.dhcp服务器 dhcpd服务 住配置文件在/etc/dhcp/目录下:共有三个文件:
[root@acermt dhcp]# ll
total 12
drwxr-xr-x. 2 root root 4096 May 10 21:28 dhclient.d
-rw-r--r--. 1 root root 193 Sep 4 2010 dhcpd6.conf
-rw-r--r--. 1 root root 3282 Jun 1 19:43 dhcpd.conf
[root@acermt dhcp]# pwd
/etc/dhcp
[root@acermt dhcp]# ls -a
. .. dhclient.d dhcpd6.conf dhcpd.conf .dhcpd.conf.swp
//当vim dhcpd.conf 出错时 #rm -r .dhcpd.conf.swp 类似问题在gcc编译是也会出现
//没删除会出现的情况:
E325: ATTENTION
Found a swap file by the name ".dhcpd.conf.swp"
owned by: root dated: Wed Jun 1 20:08:41 2011
file name: /etc/dhcp/dhcpd.conf
modified: YES
user name: root host name: acermt
process ID: 5002
While opening file "dhcpd.conf"
dated: Wed Jun 1 19:43:21 2011
(1) Another program may be editing the same file.
If this is the case, be careful not to end up with two
different instances of the same file when making changes.
Quit, or continue with caution.
(2) An edit session for this file crashed.
If this is the case, use ":recover" or "vim -r dhcpd.conf"
to recover the changes (see ":help recovery").
If you did this already, delete the swap file ".dhcpd.conf.swp"
to avoid this message.
Swap file ".dhcpd.conf.swp" already exists!
[O]pen Read-Only, (E)dit anyway, (R)ecover, (D)elete it, (Q)uit, (A)bort:
//要学会保存一些原始的配置文件: cp dhcpd.conf dhcpd-backup.conf
2. # vim dhcpd.conf //注意 # 表示注释 每一行都得 ； 结尾 写租约
自己的ip最好是static
log-facility local7;
subnet 192.168.1.0 netmask 255.255.255.0 { //用ifconfig -a 查看一下自己的ip
range dynamic-bootp 192.168.1.1 192.168.1.254; //ip动态分配池的范围 c类最多 253 个 空格隔开
# option broadcast-address 192.168.1.255; //这事组播地址 可以去掉 协议自动生成
option domain-name-servers 192.168.1.103,8.8.8.8; //DNS SERVER 可以是localhost 多个逗号隔开
option domain-name "internal.example.org"; //
option routers 192.168.1.103; //路由 本处配为自己的主机ip
也可以是本机经过的路由 192.168.1.1 ？
default-lease-tiime 43200 ;
max-lease-time 86400 ; // 租约时间设置 默认半天 最多一天 如果超时了呢？
}
//一些附加 或者说自由的服务 dhcp 给某一些主机 固定的 ip
host boss{ //fantasia是默认参数幻想的含义 此处我改为 boss
hardware ethernet 08:00:07:26:c0:a5; //08:00:07:26:c0:a5 必须是boss主机的MAC地址
fixed-address 192.168.1.88; //分配给boss 的具体或者说固定的 ip
}
host staff1 {
hardware ethernet 08:00:07:26:c0:a5; //员工1 的 MAC地址
fixed-address 192.168.1.2;
}
host stall2{
hardware ethernet 08:00:07:26:c0:a5; //员工2 de MAC地址
fixed-address 192.168.1.3;
}
// 可以很自由地 加下去
// 更自由的设置 不同网段得到不同的地址(跨网段的DHCP)
# A slightly different configuration for an internal subnet.
log-facility local7;
shared-network example { //注意这一个 { 的匹配 把整个内容 括起来
default-lease-time 600;
max-lease-time 7200;
option routers 192.168.1.103 ; //如此设置就把下面所有的网段的路由都定为 192.168.1.103
一般此处都不加路由设置 只有时间设置 而把路由放不同的网段内 来满足需要 关键是需求
subnet 192.168.1.0 netmask 255.255.255.0 {
rang dynamic-bootp 192.168.0.1 192.168.0.13;
option routers 192.168.1.254 //没有 option routers 192.168.1.103 ;
option domain-name-servers 192.168.0.254 ;
}
subnet 192.168.2.0 netmask 255.255.255.0{
rang dynamic-bootp 192.168.2.1 192.168.2.13 ;
option routers 192.168.2.254 //没有 option routers 192.168.1.103 ;
option domain-name-servers 192.168.1.254;
}
}
// 对不同的操做系统，以及虚拟机 都可以让它得到不同的ip
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