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      1 # dhcpd.conf
      2 #
      3 # Sample configuration file for ISC dhcpd
      4 #
      5 
      6 # option definitions common to all supported networks...
      7 option domain-name "example.org";
      8 option domain-name-servers ns1.example.org, ns2.example.org;
      9 
     10 default-lease-time 600;
     11 max-lease-time 7200;
     12 
     13 # Use this to enble / disable dynamic dns updates globally.
     14 #ddns-update-style none;
     15 
     16 # If this DHCP server is the official DHCP server for the local
     17 # network, the authoritative directive should be uncommented.
     18 #authoritative;
     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).
     22 log-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 
     27 subnet 10.152.187.0 netmask 255.255.255.0 {
     28 }
     29 
     30 # This is a very basic subnet declaration.
     31 
     32 subnet 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 
     40 subnet 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.
     47 subnet 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 
     62 host passacaglia {
     63   hardware ethernet 0:0:c0:5d:bd:95;
     64   filename "vmunix.passacaglia";
     65   server-name "toccata.example.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.
     75 host fantasia {
     76   hardware ethernet 08:00:07:26:c0:a5;
     77   fixed-address fantasia.example.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 
     85 class "foo" {
     86   match if substring (option vendor-class-identifier, 0, 4) = "SUNW";
     87 }
     88 
     89 shared-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