DHCP（动态主机配置协议）是一个局域网的网络协议。指的是由服务器控制一段IP地址范围，客户机登录服务器时就可以自动获得服务器分配的IP地址和子网掩码。默认情况下，DHCP作为Windows Server的一个服务组件不会被系统自动安装，还需要管理员手动安装并进行必要的配置。
客户端模式
作为客户端接入DHCP服务：连接路由器，使用自动IP搜索功能：
1 | [root@test ~]#/sbin/udhcpc |
服务端模式
作为DHCP服务，可以与其他客户端通过网线直连：
关闭
dhcpc自动IP搜索功能1
killall -9 udhcpc
设置本地静态IP地址
1
ifconfig eth0 192.168.32.10 netmask 255.255.254.0
eth0: 本地使用的网卡
192.168.32.10: 本地使用的IP地址
配置DHCP服务：
vi /etc/udhcpd.conf1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121# Sample udhcpd configuration file (/etc/udhcpd.conf)
# The start and end of the IP lease block
start 192.168.32.20 #客户端的起始地址
end 192.168.32.254 #客户端的结束地址
# The interface that udhcpd will use
interface eth0 #网卡
# The maximim number of leases (includes addressesd reserved
# by OFFER's, DECLINE's, and ARP conficts
#max_leases 254 #default: 254
# If remaining is true (default), udhcpd will store the time
# remaining for each lease in the udhcpd leases file. This is
# for embedded systems that cannot keep time between reboots.
# If you set remaining to no, the absolute time that the lease
# expires at will be stored in the dhcpd.leases file.
#remaining yes #default: yes
# The time period at which udhcpd will write out a dhcpd.leases
# file. If this is 0, udhcpd will never automatically write a
# lease file. (specified in seconds)
#auto_time 7200 #default: 7200 (2 hours)
# The amount of time that an IP will be reserved (leased) for if a
# DHCP decline message is received (seconds).
#decline_time 3600 #default: 3600 (1 hour)
# The amount of time that an IP will be reserved (leased) for if an
# ARP conflct occurs. (seconds
#conflict_time 3600 #default: 3600 (1 hour)
# How long an offered address is reserved (leased) in seconds
#offer_time 60 #default: 60 (1 minute)
# If a lease to be given is below this value, the full lease time is
# instead used (seconds).
#min_lease 60 #defult: 60
# The location of the leases file
#lease_file /var/lib/misc/udhcpd.leases #defualt: /var/lib/misc/udhcpd.leases
# The location of the pid file
#pidfile /var/run/udhcpd.pid #default: /var/run/udhcpd.pid
# Everytime udhcpd writes a leases file, the below script will be called.
# Useful for writing the lease file to flash every few hours.
#notify_file #default: (no script)
#notify_file dumpleases # <--- useful for debugging
# The following are bootp specific options, setable by udhcpd.
#siaddr 192.168.0.22 #default: 0.0.0.0
#sname zorak #default: (none)
#boot_file /var/nfs_root #default: (none)
# The remainer of options are DHCP options and can be specifed with the
# keyword 'opt' or 'option'. If an option can take multiple items, such
# as the dns option, they can be listed on the same line, or multiple
# lines. The only option with a default is 'lease'.
#Examles
opt dns 114.114.114.114 223.5.5.5 #192.168.10.2 192.168.10.10
option subnet 255.255.255.0
opt router 192.168.32.10
#opt wins 192.168.10.10
option dns 192.168.32.10 #129.219.13.81 # appened to above DNS servers for a total of 3
option domain local
option lease 864000 # 10 days of seconds
# Currently supported options, for more info, see options.c
#opt subnet
#opt timezone
#opt router
#opt timesrv
#opt namesrv
#opt dns
#opt logsrv
#opt cookiesrv
#opt lprsrv
#opt bootsize
#opt domain
#opt swapsrv
#opt rootpath
#opt ipttl
#opt mtu
#opt broadcast
#opt wins
#opt lease
#opt ntpsrv
#opt tftp
#opt bootfile
#opt wpad
# Static leases map
#static_lease 00:60:08:11:CE:4E 192.168.0.54
#static_lease 00:60:08:11:CE:3E 192.168.0.44启动DHCP服务
1
udhcpd -fS -I 192.168.32.10 /etc/udhcpd.conf