Nextelco:DHCP

= DHCP server = For DHCP service implementation isc dhcp server has been used. These are the steps followed for its installation and configuration:  Install isc-dhcp-server After the installation the server is not able to run automatically, these are the error messages thrown to syslog appserver dhcpd: Internet Systems Consortium DHCP Server 4.2.2 appserver dhcpd: Copyright 2004-2011 Internet Systems Consortium. appserver dhcpd: All rights reserved. appserver dhcpd: For info, please visit https://www.isc.org/software/dhcp/ appserver dhcpd: Internet Systems Consortium DHCP Server 4.2.2 appserver dhcpd: Copyright 2004-2011 Internet Systems Consortium. appserver dhcpd: All rights reserved. appserver dhcpd: For info, please visit https://www.isc.org/software/dhcp/ appserver dhcpd: Wrote 0 leases to leases file. appserver dhcpd: appserver dhcpd: No subnet declaration for eth1 (192.168.14.4). appserver dhcpd: ** Ignoring requests on eth1. If this is not what appserver dhcpd:   you want, please write a subnet declaration appserver dhcpd:   in your dhcpd.conf file for the network segment appserver dhcpd:   to which interface eth1 is attached. ** appserver dhcpd: appserver dhcpd: appserver dhcpd: Not configured to listen on any interfaces! Edit /etc/dhcp/dhcpd.conf file and set the following configuration # # # ddns-update-style none; option domain-name "basicinternet.no"; option domain-name-servers 192.168.14.4; default-lease-time 600; max-lease-time 7200; authoritative; log-facility local7; host config { hardware ethernet 00:26:08:0d:b2:e6; fixed-address 192.168.14.10; } subnet 192.168.14.0 netmask 255.255.255.0 { range 192.168.14.100 192.168.14.200; option routers 192.168.14.1; option domain-name-servers 192.168.14.4; option broadcast-address 192.168.14.255; option domain-name "basicinternet.no"; default-lease-time 600; max-lease-time 7200; } #} #} #} #} #} #} #} # } #  } #  } #  } #} Finally, if we want to check which are the IP addresses the server has leased, we use the following command 
 * 1) apt-get install isc-dhcp-server
 * 1) Sample configuration file for ISC dhcpd for Debian
 * 1) The ddns-updates-style parameter controls whether or not the server will
 * 2) attempt to do a DNS update when a lease is confirmed. We default to the
 * 3) behavior of the version 2 packages ('none', since DHCP v2 didn't
 * 4) have support for DDNS.)
 * 1) option definitions common to all supported networks...
 * 1) If this DHCP server is the official DHCP server for the local
 * 2) network, the authoritative directive should be uncommented.
 * 1) Use this to send dhcp log messages to a different log file (you also
 * 2) have to hack syslog.conf to complete the redirection).
 * 1) No service will be given on this subnet, but declaring it helps the
 * 2) DHCP server to understand the network topology.
 * 1) subnet 10.152.187.0 netmask 255.255.255.0 {
 * 1) This is a very basic subnet declaration.
 * 1) subnet 10.254.239.0 netmask 255.255.255.224 {
 * 2)  range 10.254.239.10 10.254.239.20;
 * 3)  option routers rtr-239-0-1.example.org, rtr-239-0-2.example.org;
 * 1) This declaration allows BOOTP clients to get dynamic addresses,
 * 2) which we don't really recommend.
 * 1) subnet 10.254.239.32 netmask 255.255.255.224 {
 * 2)  range dynamic-bootp 10.254.239.40 10.254.239.60;
 * 3)  option broadcast-address 10.254.239.31;
 * 4)  option routers rtr-239-32-1.example.org;
 * 1) A slightly different configuration for an internal subnet.
 * 2) subnet 10.5.5.0 netmask 255.255.255.224 {
 * 3)  range 10.5.5.26 10.5.5.30;
 * 4)  option domain-name-servers ns1.internal.example.org;
 * 5)  option domain-name "internal.example.org";
 * 6)  option routers 10.5.5.1;
 * 7)  option broadcast-address 10.5.5.31;
 * 8)  default-lease-time 600;
 * 9)  max-lease-time 7200;
 * 1) Hosts which require special configuration options can be listed in
 * 2) host statements.   If no address is specified, the address will be
 * 3) allocated dynamically (if possible), but the host-specific information
 * 4) will still come from the host declaration.
 * 1) host passacaglia {
 * 2)  hardware ethernet 0:0:c0:5d:bd:95;
 * 3)  filename "vmunix.passacaglia";
 * 4)  server-name "toccata.fugue.com";
 * 1) Fixed IP addresses can also be specified for hosts.   These addresses
 * 2) should not also be listed as being available for dynamic assignment.
 * 3) Hosts for which fixed IP addresses have been specified can boot using
 * 4) BOOTP or DHCP.   Hosts for which no fixed address is specified can only
 * 5) be booted with DHCP, unless there is an address range on the subnet
 * 6) to which a BOOTP client is connected which has the dynamic-bootp flag
 * 7) set.
 * 8) host fantasia {
 * 9)  hardware ethernet 08:00:07:26:c0:a5;
 * 10)  fixed-address fantasia.fugue.com;
 * 1) You can declare a class of clients and then do address allocation
 * 2) based on that.   The example below shows a case where all clients
 * 3) in a certain class get addresses on the 10.17.224/24 subnet, and all
 * 4) other clients get addresses on the 10.0.29/24 subnet.
 * 1) class "foo" {
 * 2)  match if substring (option vendor-class-identifier, 0, 4) = "SUNW";
 * 1) shared-network 224-29 {
 * 2)  subnet 10.17.224.0 netmask 255.255.255.0 {
 * 3)    option routers rtr-224.example.org;
 * 1)  subnet 10.0.29.0 netmask 255.255.255.0 {
 * 2)    option routers rtr-29.example.org;
 * 1)  pool {
 * 2)    allow members of "foo";
 * 3)    range 10.17.224.10 10.17.224.250;
 * 1)  pool {
 * 2)    deny members of "foo";
 * 3)    range 10.0.29.10 10.0.29.230;
 * 1) more /var/lib/dhcp/dhcpd.leases

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