Centos add virtual IP(s)

Publisher: Psychz Networks, January 05,2015

The first step before configuring any IP on any Linux machine is to run

# ifconfig

this will show you how many other IP addresses are configured.

The following snippet shows that eth1 is the only IP configured on the server.

eth1 Link encap:Ethernet HWaddr 00:25:90:67:09:E5

inet addr:192.168.100.1 Bcast:104.149.3.47 Mask:255.255.255.0

inet6 addr: fe80::225:90ff:fe67:9e5/64 Scope:Link

You can add several virtual IP addresses to a physical network interface.

Create a configuration file called ifcfg-<interface name>:0 in /etc/sysconfig/network-scripts/

The syntax of the configuration will be like this :

DEVICE="eth0"

BOOTPROTO="static"

ONBOOT="yes"

IPADDR=x.x.x.x

GATEWAY=x.x.x.x

NETMASK=255.255.255.0

TYPE=Ethernet

Then restart the service and you should be good to go.

service network restart

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