# dhcpd.conf　　#　　# Sample configuration file for ISC dhcpd　　#　　# option definitions common to all supported networks...　　option domain-name "rd.xxx.com";　　option domain-name-servers compaq.rd.xxx.com;　　default-lease-time 86400;　　max-lease-time 172800;　　ddns-update-style ad-hoc;　　# 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.　　# This is a very basic subnet declaration.　　subnet 21.9.22.0 netmask 255.255.255.224 {　　　　range 21.9.22.2 21.9.22.6;　　　　option routers 21.9.22.1;　　}　　# 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 10.5.5.31;　　# 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 10.17.224.10 10.17.224.250;　　# }　　# pool {　　# deny members of "foo";　　# range 10.0.29.10 10.0.29.230;　　# }