dhcp server 配置

dhcp server 安装配置之Option: (43) Vendor-Specific Information

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安装 dhcp server

执行命令：

sudo apt-get install dhcp3-server

修改配置文件

修改默认文件，指定运行的网卡：

sudo vim /etc/default/isc-dhcp-server

例如，指定dhcp server 运行于eth1上监听此网卡上的dhcp 请求：

INTERFACES="eth1"

修改配置文件：

sudo vim /etc/dhcp/dhcpd.conf

一般关注文件中如下内容,指定网络范围，掩码，广播地址，域名，dns，租约时间等：

subnet 192.168.1.0 netmask 255.255.255.0 {        range 192.168.1.3 192.168.1.100;        option subnet-mask 255.255.255.0;        option domain-name "calix.test.local";        option domain-name-servers 192.168.1.1;        option broadcast-address 192.168.1.255;        option routers 192.168.1.1;}ddns-update-style none;default-lease-time 300;max-lease-time 600;

其中， option 60字段是通过option vendor-encapsulated-options 设置的，里面可以增加sub-option：

subnet 192.168.1.0 netmask 255.255.255.0 {        range 192.168.1.3 192.168.1.100;        option subnet-mask 255.255.255.0;        option domain-name "test.local";        option domain-name-servers 192.168.1.1;        option broadcast-address 192.168.1.255;        option routers 192.168.1.1;        option vendor-encapsulated-options "self-defined-content"}或者：subnet 192.168.1.0 netmask 255.255.255.0 {        range 192.168.1.3 192.168.1.100;        option subnet-mask 255.255.255.0;            option domain-name "test.local";        option domain-name-servers 192.168.1.1;        option broadcast-address 192.168.1.255;        option routers 192.168.1.1;        **option vendor-encapsulated-options                                     01:05:70:71:72:73:74:        02:06:70:71:72:73:74:75:        03:07:70:71:72:73:74:75:76;}

运行dhcp server

运行：

test@pc:/etc$ sudo service isc-dhcp-server startisc-dhcp-server start/running, process 4910

停止：

test@pc:/etc$ sudo service isc-dhcp-server stopisc-dhcp-server stop/waiting

重启动：

test@pc:/etcc$ sudo service isc-dhcp-server restartisc-dhcp-server stop/waitingisc-dhcp-server start/running, process 4952

监控运行状态

test@pc:/etc$ tail -f /var/log/syslogSep 19 04:05:57 pc dhcpd: Internet Systems Consortium DHCP Server 4.2.4Sep 19 04:05:57 pc dhcpd: Copyright 2004-2012 Internet Systems Consortium.Sep 19 04:05:57 pc dhcpd: All rights reserved.Sep 19 04:05:57 pc dhcpd: For info, please visit https://www.isc.org/software/dhcp/Sep 19 04:05:57 pc dhcpd: Internet Systems Consortium DHCP Server 4.2.4Sep 19 04:05:57 pc dhcpd: Copyright 2004-2012 Internet Systems Consortium.Sep 19 04:05:57 pc dhcpd: All rights reserved.Sep 19 04:05:57 pc dhcpd: For info, please visit https://www.isc.org/software/dhcp/Sep 19 04:05:57 pc dhcpd: Wrote 2 leases to leases file.Sep 19 04:06:17 pc chronyd[1425]: Selected source 2.18.1.8