16.3. Configuring a DHCPv4 Client
To configure a DHCP client manually, modify the
/etc/sysconfig/network file to enable networking and the configuration file for each network device in the /etc/sysconfig/network-scripts directory. In this directory, each device should have a configuration file named ifcfg-eth0, where eth0 is the network device name.
Make sure that the
/etc/sysconfig/network-scripts/ifcfg-eth0 file contains the following lines:
DEVICE=eth0 BOOTPROTO=dhcp ONBOOT=yes
To use DHCP, set a configuration file for each device.
Other options for the network script include:
DHCP_HOSTNAME— Only use this option if the DHCP server requires the client to specify a host name before receiving an IP address.PEERDNS=<answer>, where<answer>is one of the following:yes— Modify/etc/resolv.confwith information from the server. This is the default.no— Do not modify/etc/resolv.conf.
If you prefer using a graphical interface, see Chapter 10, NetworkManager for instructions on using NetworkManager to configure a network interface to use DHCP.
Note
For advanced configurations of client DHCP options such as protocol timing, lease requirements and requests, dynamic DNS support, aliases, as well as a wide variety of values to override, prepend, or append to client-side configurations, see the
dhclient and dhclient.conf man pages.
