Configuring A Multihomed Dhcp Server - Red Hat ENTERPRISE LINUX 5 - DEPLOYMENT Deployment Manual

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 file should contain the following line:
NETWORKING=yes
The NETWORKING variable must be set to yes if you want networking to start at boot time.
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.
• SRCADDR=<address>, where <address> is the specified source IP address for outgoing packets.
• USERCTL=<answer>, where <answer> is one of the following:
• yes — Non-root users are allowed to control this device.
• no — Non-root users are not allowed to control this device.
If you prefer using a graphical interface, refer to
using the Network Administration Tool to configure a network interface to use DHCP.
Tip
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, refer to the
dhclient and dhclient.conf man pages.

21.4. Configuring a Multihomed DHCP Server

A multihomed DHCP server serves multiple networks, that is, multiple subnets. The examples in these
sections detail how to configure a DHCP server to serve multiple networks, select which network
interfaces to listen on, and how to define network settings for systems that move networks.
Configuring a Multihomed DHCP Server
Chapter 15, Network Configuration
for instructions on
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