1# dhcpd.conf 2# 3# Sample configuration file for ISC dhcpd 4# 5 6# option definitions common to all supported networks... 7option domain-name "example.org"; 8option domain-name-servers ns1.example.org, ns2.example.org; 9 10default-lease-time 600; 11max-lease-time 7200; 12 13# If this DHCP server is the official DHCP server for the local 14# network, the authoritative directive should be uncommented. 15#authoritative; 16 17# Dynamic DNS update scheme - must be set to "none", "interim" or "ad-hoc". 18ddns-update-style none; 19 20# Use this to send dhcp log messages to a different log file (you also 21# have to hack syslog.conf to complete the redirection). 22log-facility local7; 23 24# No service will be given on this subnet, but declaring it helps the 25# DHCP server to understand the network topology. 26 27subnet 10.152.187.0 netmask 255.255.255.0 { 28} 29 30# This is a very basic subnet declaration. 31 32subnet 10.254.239.0 netmask 255.255.255.224 { 33 range 10.254.239.10 10.254.239.20; 34 option routers rtr-239-0-1.example.org, rtr-239-0-2.example.org; 35} 36 37# This declaration allows BOOTP clients to get dynamic addresses, 38# which we don't really recommend. 39 40subnet 10.254.239.32 netmask 255.255.255.224 { 41 range dynamic-bootp 10.254.239.40 10.254.239.60; 42 option broadcast-address 10.254.239.31; 43 option routers rtr-239-32-1.example.org; 44} 45 46# A slightly different configuration for an internal subnet. 47subnet 10.5.5.0 netmask 255.255.255.224 { 48 range 10.5.5.26 10.5.5.30; 49 option domain-name-servers ns1.internal.example.org; 50 option domain-name "internal.example.org"; 51 option routers 10.5.5.1; 52 option broadcast-address 10.5.5.31; 53 default-lease-time 600; 54 max-lease-time 7200; 55} 56 57# Hosts which require special configuration options can be listed in 58# host statements. If no address is specified, the address will be 59# allocated dynamically (if possible), but the host-specific information 60# will still come from the host declaration. 61 62host passacaglia { 63 hardware ethernet 0:0:c0:5d:bd:95; 64 filename "vmunix.passacaglia"; 65 server-name "toccata.fugue.com"; 66} 67 68# Fixed IP addresses can also be specified for hosts. These addresses 69# should not also be listed as being available for dynamic assignment. 70# Hosts for which fixed IP addresses have been specified can boot using 71# BOOTP or DHCP. Hosts for which no fixed address is specified can only 72# be booted with DHCP, unless there is an address range on the subnet 73# to which a BOOTP client is connected which has the dynamic-bootp flag 74# set. 75host fantasia { 76 hardware ethernet 08:00:07:26:c0:a5; 77 fixed-address fantasia.fugue.com; 78} 79 80# You can declare a class of clients and then do address allocation 81# based on that. The example below shows a case where all clients 82# in a certain class get addresses on the 10.17.224/24 subnet, and all 83# other clients get addresses on the 10.0.29/24 subnet. 84 85class "foo" { 86 match if substring (option vendor-class-identifier, 0, 4) = "SUNW"; 87} 88 89shared-network 224-29 { 90 subnet 10.17.224.0 netmask 255.255.255.0 { 91 option routers rtr-224.example.org; 92 } 93 subnet 10.0.29.0 netmask 255.255.255.0 { 94 option routers rtr-29.example.org; 95 } 96 pool { 97 allow members of "foo"; 98 range 10.17.224.10 10.17.224.250; 99 } 100 pool { 101 deny members of "foo"; 102 range 10.0.29.10 10.0.29.230; 103 } 104} 105