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