Configuring a DHCP 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.

The /etc/sysconfig/network-scripts/ifcfg-eth0 file should contain the following lines:

DEVICE=eth0

BOOTPROTO=dhcp

ONBOOT=yes

A configuration file is needed for each device to be configured to use DHCP.

Other options for the network script includes:

• DHCP_HOSTNAME — Only use this option if the DHCP server requires the client to specify a hostname before receiving an IP address. (The DHCP server daemon in Red Hat Enterprise Linux  does not support this feature.)
• PEERDNS=<answer> , where <answer> is one of the following:
• yes — Modify /etc/resolv.conf with information from the server. If using DHCP, then yes is the default.
• no — Do not modify /etc/resolv.conf.