dhcp部署

安装dhcp

yum install -y dhcp

 

编辑配置文件

先把/usr/share/doc/dhcp-4.2.5/dhcpd.conf.example文件复制到/etc/dhcp,覆盖掉dhcpd.conf文件，并且重命名为dhcpd.conf。

编辑dhcpd.conf

[root@localhost dhcp]# cat dhcpd.conf
# dhcpd.conf
#
# Sample configuration file for ISC dhcpd
#

# option definitions common to all supported networks...
##option domain-name "example.org";
##option domain-name-servers ns1.example.org, ns2.example.org;

##default-lease-time 600;
##max-lease-time 7200;

# Use this to enble / disable dynamic dns updates globally.
#ddns-update-style none;

# If this DHCP server is the official DHCP server for the local
# network, the authoritative directive should be uncommented.
#authoritative;

# Use this to send dhcp log messages to a different log file (you also
# have to hack syslog.conf to complete the redirection).
##log-facility local7;

# No service will be given on this subnet, but declaring it helps the 
# DHCP server to understand the network topology.

##subnet 10.152.187.0 netmask 255.255.255.0 {
##}

# This is a very basic subnet declaration.

##subnet 192.168.3.0 netmask 255.255.255.224 {
##  range 192.168.3.20 192.168.3.254;
##  option routers rtr-239-0-1.example.org, rtr-239-0-2.example.org;
##}

# This declaration allows BOOTP clients to get dynamic addresses,
# which we don't really recommend.

##subnet 10.254.239.32 netmask 255.255.255.224 {
##  range dynamic-bootp 192.168.3.40 192.168.3.60;
##  option broadcast-address 192.168.3.31;
##  option routers rtr-239-32-1.example.org;
##}

# A slightly different configuration for an internal subnet.
subnet 192.168.3.0 netmask 255.255.255.0 {
  range 192.168.3.20 192.168.3.254;
  option domain-name-servers 192.168.3.11;
  option domain-name "liutao.com";
  option routers 192.168.3.1;
  option broadcast-address 192.168.3.255;
  default-lease-time 600;
  max-lease-time 7200;
}

# Hosts which require special configuration options can be listed in
# host statements.   If no address is specified, the address will be
# allocated dynamically (if possible), but the host-specific information
# will still come from the host declaration.

host passacaglia {
  hardware ethernet 0:0:c0:5d:bd:95;
  filename "vmunix.passacaglia";
  server-name "toccata.fugue.com";
}

# Fixed IP addresses can also be specified for hosts.   These addresses
# should not also be listed as being available for dynamic assignment.
# Hosts for which fixed IP addresses have been specified can boot using
# BOOTP or DHCP.   Hosts for which no fixed address is specified can only
# be booted with DHCP, unless there is an address range on the subnet
# to which a BOOTP client is connected which has the dynamic-bootp flag
# set.
host fantasia {
  hardware ethernet 08:00:07:26:c0:a5;
  fixed-address fantasia.fugue.com;
}

# You can declare a class of clients and then do address allocation
# based on that.   The example below shows a case where all clients
# in a certain class get addresses on the 10.17.224/24 subnet, and all
# other clients get addresses on the 10.0.29/24 subnet.

class "foo" {
  match if substring (option vendor-class-identifier, 0, 4) = "SUNW";
}

shared-network 224-29 {
  subnet 10.17.224.0 netmask 255.255.255.0 {
    option routers rtr-224.example.org;
  }
  subnet 10.0.29.0 netmask 255.255.255.0 {
    option routers rtr-29.example.org;
  }
  pool {
    allow members of "foo";
    range 10.17.224.10 10.17.224.250;
  }
  pool {
    deny members of "foo";
    range 10.0.29.10 10.0.29.230;
  }
}
[root@localhost dhcp]# 

 

重启systemctl restart dhcpd

ps -ef | grep dhcpd

lsof -i :67

查看ip分配情况

[root@localhost dhcp-4.2.5]# cat /var/lib/dhcpd/dhcpd.leases
# The format of this file is documented in the dhcpd.leases(5) manual page.
# This lease file was written by isc-dhcp-4.2.5

lease 192.168.3.20 {
  starts 5 2021/09/10 03:13:51;
  ends 5 2021/09/10 03:15:51;
  cltt 5 2021/09/10 03:13:51;
  binding state free;
  hardware ethernet 00:0c:29:d1:45:eb;
}
lease 192.168.3.30 {
  starts 5 2021/09/10 03:46:18;
  ends 5 2021/09/10 03:56:18;
  cltt 5 2021/09/10 03:46:18;
  binding state active;
  next binding state free;
  rewind binding state free;
  hardware ethernet 00:0c:29:d1:45:eb;
}
server-duid "\000\001\000\001(\315\202\333\000\014)\221\340#";

lease 192.168.3.30 {
  starts 5 2021/09/10 03:51:16;
  ends 5 2021/09/10 04:01:16;
  cltt 5 2021/09/10 03:51:16;
  binding state active;
  next binding state free;
  rewind binding state free;
  hardware ethernet 00:0c:29:d1:45:eb;
}
lease 192.168.3.30 {
  starts 5 2021/09/10 03:55:08;
  ends 5 2021/09/10 04:05:08;
  cltt 5 2021/09/10 03:55:08;
  binding state active;
  next binding state free;
  rewind binding state free;
  hardware ethernet 00:0c:29:d1:45:eb;
}
lease 192.168.3.30 {
  starts 5 2021/09/10 03:59:01;
  ends 5 2021/09/10 04:09:01;
  cltt 5 2021/09/10 03:59:01;
  binding state active;
  next binding state free;
  rewind binding state free;
  hardware ethernet 00:0c:29:d1:45:eb;
}
lease 192.168.3.31 {
  starts 5 2021/09/10 03:59:42;
  ends 5 2021/09/10 04:09:42;
  cltt 5 2021/09/10 03:59:42;
  binding state active;
  next binding state free;
  rewind binding state free;
  hardware ethernet 00:0c:29:28:4d:73;
}
lease 192.168.3.31 {
  starts 5 2021/09/10 04:03:32;
  ends 5 2021/09/10 04:13:32;
  cltt 5 2021/09/10 04:03:32;
  binding state active;
  next binding state free;
  rewind binding state free;
  hardware ethernet 00:0c:29:28:4d:73;
}
lease 192.168.3.30 {
  starts 5 2021/09/10 04:03:41;
  ends 5 2021/09/10 04:13:41;
  cltt 5 2021/09/10 04:03:41;
  binding state active;
  next binding state free;
  rewind binding state free;
  hardware ethernet 00:0c:29:d1:45:eb;
}
lease 192.168.3.31 {
  starts 5 2021/09/10 04:07:40;
  ends 5 2021/09/10 04:17:40;
  cltt 5 2021/09/10 04:07:40;
  binding state active;
  next binding state free;
  rewind binding state free;
  hardware ethernet 00:0c:29:28:4d:73;
}
lease 192.168.3.30 {
  starts 5 2021/09/10 04:08:14;
  ends 5 2021/09/10 04:18:14;
  cltt 5 2021/09/10 04:08:14;
  binding state active;
  next binding state free;
  rewind binding state free;
  hardware ethernet 00:0c:29:d1:45:eb;
}
lease 192.168.3.31 {
  starts 5 2021/09/10 04:12:09;
  ends 5 2021/09/10 04:22:09;
  cltt 5 2021/09/10 04:12:09;
  binding state active;
  next binding state free;
  rewind binding state free;
  hardware ethernet 00:0c:29:28:4d:73;
}
lease 192.168.3.30 {
  starts 5 2021/09/10 04:12:34;
  ends 5 2021/09/10 04:22:34;
  cltt 5 2021/09/10 04:12:34;
  binding state active;
  next binding state free;
  rewind binding state free;
  hardware ethernet 00:0c:29:d1:45:eb;
}

配置文件IP地址是从20开始分配的，已经配置2个ip 30和31

每一台新服务器把网络设置改为仅主机模式，vlan添加上ip192.168.3.20

系统装好后编辑网卡配置文件

将网关地址设置为dhcp服务器IP地址 ，子网掩码，dns等设置好

重启网卡