dhcp provide a method for hosts on a network to request and be granted,configuration information including the address of routers and nameservers
Ipv4 addresses are either dynamically assigned from a range of address and netmask,its default gateway .Domain name and dns server,timeserver,and location of kickstart conf.files
service profile:
type :SysteV-managed service
package:dhcp
Daemon: /usr/sbin/dhcpd
script : /etc/init.d/dhcpd
ports : 67(bootps), 68 (bootpc)
conf.file: /etc/dhcpd.conf,/var/lib/dhcpd/dhcpd.leases
related: dhclient,dhcpv6-client,dhcpv6
steps to configure dhcp server:
#yum install dhcpd-* -y
#service dhcpd start
#chkconfig dhcpd on
#cp /usr/share/doc/dhcp-3.0.5/dhcpd.conf.sample /etc/dhcpd.conf
# vi /etc/dhcpd.conf
(change as follows)
ddns-update-style interim;
ignore client-updates;
subnet 192.168.0.0 netmask 255.255.255.0 {
# --- default gateway
option routers 192.168.0.254; (server ip)
option subnet-mask 255.255.255.0; (subnetmask)
option nis-domain "domain.org";
option domain-name "redhat.com"; (domain name)
option domain-name-servers 192.168.0.254; (dns ip)
option time-offset -18000; # Eastern Standard Time
# option ntp-servers 192.168.1.1;
# option netbios-name-servers 192.168.1.1;
# --- Selects point-to-point node (default is hybrid). Don't change this unless
# -- you understand Netbios very well
# option netbios-node-type 2;
range dynamic-bootp 192.168.0.1 192.168.0.20; (ip range)
default-lease-time 21600;
max-lease-time 43200;
save & quit
#service dhcpd restart
if you want to give a specific ip for a system
at the end of the file specify as follows
host station1
{ hardware ethernet 00:a0:cc:3d:45:3e
fixed address 192.168.0.10;
}
}
(here in this example we are providing 192.168.0.10 for a specific system we have to type mac address of that system at hardware ethernet)
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