{"id":1397,"date":"2012-01-15T11:22:14","date_gmt":"2012-01-15T11:22:14","guid":{"rendered":"http:\/\/mccltd.net\/blog\/?page_id=1397"},"modified":"2012-08-30T12:32:17","modified_gmt":"2012-08-30T11:32:17","slug":"install-dhcp-on-centos-dom0","status":"publish","type":"page","link":"http:\/\/darenmatthews.com\/blog\/?page_id=1397","title":{"rendered":"Install DHCP on CentOS (Dom0)"},"content":{"rendered":"

15 JAN 2012 – INSTALL DHCP SERVER (and configure for Cisco Phone options)
\nNOTE: The tftp server address at this point was my laptop.\u00a0 This address was subsequently altered to shimla’s Dom0 interface (eth0) ip address.\u00a0 For information on installing the TFTP server see here: http:\/\/darenmatthews.com\/blog\/?page_id=1404<\/a><\/p>\n


\ninstall dhcp server:
\nyum install dhcp
\n(then edit dhcpd.conf as in example which also use options for Cisco phone to locate tftp server):<\/p>\n

[root@shimla ~]# ls \/etc\/dhc*
\n\/etc\/dhclient-eth0.conf\u00a0 \/etc\/dhcp6c.conf\u00a0 \/etc\/dhcpd.conf
\nThis is the newly edited dhcpd.conf:<\/p>\n

[root@shimla ~]# cat \/etc\/dhcpd.conf<\/p>\n

ddns-update-style interim;
\nignore client-updates;<\/p>\n

option voip-tftp-servers code 150 = ip-address;
\noption voip-tftp-servers 10.10.0.100;<\/p>\n

subnet 10.10.0.0 netmask 255.255.0.0 {
\noption routers\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 10.10.0.254;
\noption subnet-mask\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 255.255.0.0;
\noption nis-domain\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 “”;
\noption domain-name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 “”;
\noption domain-name-servers\u00a0\u00a0\u00a0\u00a0\u00a0 10.10.0.254;
\noption ntp-servers\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 192.168.0.130;
\noption tftp-server-name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 “10.10.0.100”;
\nrange dynamic-bootp 10.10.0.150 10.10.0.175;
\ndefault-lease-time 3600;
\nmax-lease-time 7200;
\n}
\n[root@shimla ~]#<\/p>\n

start dhcp server:
\n[root@shimla ~]# \/etc\/init.d\/dhcpd start
\ncheck status:
\n[root@shimla ~]# \/etc\/init.d\/dhcpd status
\ndhcpd (pid\u00a0 4982) is running…
\n[root@shimla ~]#<\/p>\n

View DHCP leases:
\ncat \/var\/lib\/dhcpd\/dhcpd.leases
\nexample:<\/p>\n

[root@shimla ~]# !ca
\ncat \/etc\/dhcpd.conf<\/p>\n

ddns-update-style interim;
\nignore client-updates;<\/p>\n

option voip-tftp-servers code 150 = ip-address;
\noption voip-tftp-servers 10.10.0.100;<\/p>\n

subnet 10.10.0.0 netmask 255.255.0.0 {
\noption routers\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 10.10.0.254;
\noption subnet-mask\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 255.255.0.0;
\noption nis-domain\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 “”;
\noption domain-name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 “”;
\noption domain-name-servers\u00a0\u00a0\u00a0\u00a0\u00a0 10.10.0.254;
\noption ntp-servers\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 192.168.0.130;
\noption tftp-server-name\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 “10.10.0.100”;
\nrange dynamic-bootp 10.10.0.150 10.10.0.175;
\ndefault-lease-time 3600;
\nmax-lease-time 7200;
\n}
\n[root@shimla ~]#<\/p>\n

now edit \/etc\/sysconfig\/dhcpd to make dhcp listen on eth0 (insert this):
\n[root@shimla init.d]# cat \/etc\/sysconfig\/dhcpd
\n# Command line options here
\nDHCPDARGS=eth0
\n[root@shimla init.d]#<\/p>\n

Now make dhcp server start each time CentOS booted into runlevel 5:<\/p>\n

[root@shimla ~]# chkconfig dhcpd on
\n[root@shimla ~]# chkconfig –list | grep dhcpd
\ndhcpd\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0 0:off\u00a0\u00a0 1:off\u00a0\u00a0 2:on\u00a0\u00a0\u00a0 3:on\u00a0\u00a0\u00a0 4:on\u00a0\u00a0\u00a0 5:on\u00a0\u00a0\u00a0 6:off
\n[root@shimla ~]#<\/p>\n

(this starts dhcpd in run level 5)<\/p>\n","protected":false},"excerpt":{"rendered":"

15 JAN 2012 – INSTALL DHCP SERVER (and configure for Cisco Phone options) NOTE: The tftp server address at this point was my laptop.\u00a0 This address was subsequently altered to shimla’s Dom0 interface (eth0) ip address.\u00a0 For information on installing the TFTP server see here: http:\/\/darenmatthews.com\/blog\/?page_id=1404<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":1395,"menu_order":0,"comment_status":"closed","ping_status":"open","template":"","meta":[],"_links":{"self":[{"href":"http:\/\/darenmatthews.com\/blog\/index.php?rest_route=\/wp\/v2\/pages\/1397"}],"collection":[{"href":"http:\/\/darenmatthews.com\/blog\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"http:\/\/darenmatthews.com\/blog\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"http:\/\/darenmatthews.com\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/darenmatthews.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1397"}],"version-history":[{"count":7,"href":"http:\/\/darenmatthews.com\/blog\/index.php?rest_route=\/wp\/v2\/pages\/1397\/revisions"}],"predecessor-version":[{"id":1713,"href":"http:\/\/darenmatthews.com\/blog\/index.php?rest_route=\/wp\/v2\/pages\/1397\/revisions\/1713"}],"up":[{"embeddable":true,"href":"http:\/\/darenmatthews.com\/blog\/index.php?rest_route=\/wp\/v2\/pages\/1395"}],"wp:attachment":[{"href":"http:\/\/darenmatthews.com\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1397"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}