日记 [2007年04月29日]多网段DHCP

需求：局域网有3个网段，用一台linux做代理上网，并且自动分配IP，设置dns和gateway

 

linux上需要安装4个网卡，eth0接外网，eth1接LAN1。eth2接LAN2 eth3 接LAN3

LAN1接网段1中包括的所有计算机，一个交换机端口不够可以串连

 

 

安装DHCP服务

编辑/etc/dhcph.conf

 

ddns-update-style interim;  ignore client-updates;  shared-network mynet {  option subnet-mask 255.255.255.0;  option domain-name "xinsicheng.com";  default-lease-time 86400;  max-lease-time 172800;    subnet 192.168.0.0 netmask 255.255.255.0  {  range 192.168.0.2 192.168.0.254;  option routers 192.168.0.1;  option domain-name-servers 192.168.0.1;  option broadcast-address 192.168.0.255;  host pc1 {            hardware ethernet 00:00:00:00:00:00;            fixed-address 192.168.0.1;            }  } subnet 192.168.1.0 netmask 255.255.255.0  {  range 192.168.1.2 192.168.1.254;  option routers 192.168.1.1;  option domain-name-servers 192.168.1.1;  option broadcast-address 192.168.1.255;  } subnet 192.168.2.0 netmask 255.255.255.0  {  range 192.168.2.2 192.168.2.254;  option routers 192.168.2.1;  option domain-name-servers 192.168.2.1;  option broadcast-address 192.168.0.255;  } }

启动DHCP服务

service dhcpd start

测试服务是否启动

ps -aux |grep dhcpd

netstat -anup |grep :67

 

查看DHCP分配的日志

cat /var/lib/dhcp/dhcpd.leases