linux-dhcp作用域和类

linux-dhcp作用域和类
安装dhcp server
[root@myhost ~]# hostname dhcp
[root@myhost ~]# Last login: Wed Oct 5 11:38:14 2011 from 192.168.100.1 [root@dhcp ~]# mkdir /mnt/cdrom
[root@dhcp ~]# mount /dev/cdrom /mnt/cdrom
mount: block device /dev/cdrom is write-protected, mounting read-only [root@dhcp ~]# cd /mnt/cdrom/Server/
[root@dhcp Server]# rpm -ivh dhcp-3.0.5-18.el5.i386.rpm
[root@dhcp Server]# vim /etc/sysconfig/network-scripts/ifcfg-eth0
# Advanced Micro Devices [AMD] 79c970 [PCnet32 LANCE]
DEVICE=eth0
BOOTPROTO=static
BROADCAST=192.168.100.255
HWADDR=00:0C:29:14:B3:4D
IPADDR=192.168.100.70
NETMASK=255.255.255.0
NETWORK=192.168.100.0
ONBOOT=yes
~
[root@dhcpetc]# vim /etc/resolv.conf
nameserver 192.168.100.70
超级作用域、空作用域、绑定
[root@dhcp Server]# vim /etc/dhcpd.conf
ddns-update-style interim;
ignore client-updates;
shared-network zzu {
subnet 192.168.20.0 netmask 255.255.255.0 {
option routers 192.168.20.254;
option subnet-mask 255.255.255.0;
option nis-domain "";
option domain-name "";
option domain-name-servers 192.168.100.70;
option time-offset -18000; # Eastern Standard Time
range dynamic-bootp 192.168.20.128 192.168.20.254;
default-lease-time 21600;
max-lease-time 43200;
host tec { ---ip与mac的绑定，保证每
次分配的地址都是固定的。

next-server ;
hardware ethernet 12:34:56:78:AB:CD;
fixed-address 192.168.20.100;
}
}
subnet 192.168.30.0 netmask 255.255.255.0 {
option routers 192.168.30.254;
option subnet-mask 255.255.255.0;
option nis-domain "";
option domain-name "";
option domain-name-servers 192.168.100.70;
option time-offset -18000; # Eastern Standard Time
range dynamic-bootp 192.168.30.128 192.168.30.254;
default-lease-time 21600;
max-lease-time 43200;
host mkt {
next-server ;
hardware ethernet 00:0C:29:F4:CD:0F;
fixed-address 192.168.30.100;
}
}
subnet 192.168.100.0 netmask 255.255.255.0 {
}
}
# DHCP Server Configuration file.
# see /usr/share/doc/dhcp*/dhcpd.conf.sample
#
~
~
~
"/etc/dhcpd.conf" 45L, 1209C written
[root@dhcp Server]#
[root@dhcp Server]#
[root@dhcp Server]#
[root@dhcp Server]# service dhcpdconfigtest
Syntax: OK
[root@dhcp Server]#
类别
--根据不同的用户群分配不同的地址
[root@dhcpetc]# vim dhcpd.conf
ddns-update-style interim;
ignore client-updates;
――作用域和服务器选项的小区域优先选项
subnet 192.168.20.0 netmask 255.255.255.0 {
--定义类
class "vm" {
match if substring (hardware,1,3) = 00:0C:29; --mac地址前三位匹配的分配的类}
－－基于厂商的分类
class “microsoft-client” {
match if substring (option vendor-class-identifier) =＂MSFT＂;
option 网关；
option dns；
}
option routers 192.168.20.254;
option subnet-mask 255.255.255.0;
option domain-name "";
option domain-name-servers 192.168.100.70;
--引用类
pool {
allow members of "vm";
range 192.168.20.1 192.168.20.50;
}
--如果不是vm类的mac分配下面的地址
pool {
deny members of "vm";
range 192.168.20.100 192.168.20.150;
}
default-lease-time 21600;
max-lease-time 43200;
}
"dhcpd.conf" 23L, 547C written
[root@dhcpetc]# service dhcpdconfigtest
Syntax: OK
[root@dhcpetc]#
Client
Linuxclient：
#ifconfig eth0 down
#dhclient -d eth0
--Linux从大到小分的
--Windows相反
windows client：
ipconfig /release
ipconfig /renew
更改动态dns指向
#vim /etc/resolv.conf
nameserver 222.88.88.88
nameserver 222.85.85.85
--DNS是动态产生的nameserver 更改的会被动态产生的覆盖，不想被覆盖需要在
client 设置：
# vim /etc/sysconfig/network-scripts/ifcfg-eth0
--设置添加参数PEERDNS=NO。