本节较为详细的给出了 DHCP的详细信息，可以作为使用和学习过程中的参考。
10.3.1配置文件范例
# 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;
# 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 10.254.239.0 netmask 255.255.255.224 {
range 10.254.239.10 10.254.239.20;
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 10.254.239.40 10.254.239.60;
option broadcast-address 10.254.239.31;
option routers rtr-239-32-1.example.org; }
# A slightly different configuration for an internal subnet.
subnet 10.5.5.0 netmask 255.255.255.224 {
range 10.5.5.26 10.5.5.30;
option domain-name-servers ns1.internal.example.org;
option domain-name "internal.example.org";
option routers 10.5.5.1;
option broadcast-address 10.5.56.html">5.31;
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 10.17.2250 10.17.224.250; } pool {
deny members of "foo"; range 10.0.29.10 10.0.29.230; } }