Many of
times, there will be a need for a multiple ip address on the linux machine for
some experimental purpose. In this article, I have configured second IP on the
same NIC card. Linux has the ability to configure multiple IPs on the same NIC
card. How can we configure second IP address on the single NIC card?
So
basically when I type ifconfig eth0 on my linux box, I see
eth0
Link
encap:Ethernet HWaddr 00:21:9B:F3:48:4D
inet
addr:183.83.15.120 Bcast:183.83.63.255 Mask:255.255.192.0
inet6 addr:
fe80::221:9bff:fef3:484d/64 Scope:Link
UP BROADCAST
RUNNING MULTICAST MTU:1500 Metric:1
………
So I
have an IP 183.83.15.120 already configured. So in order to configure second ip
address on the same NIC card, we need to edit some configuration files which
are located in /etc/sysconfig/network-scripts/
The
file ifcfg-eth0 says information about the first eth0 IP information. So now
edit ifcfg-eth1 available in the same location and add the following lines,
#
please read /usr/share/doc/initscripts-*/sysconfig.txt
# For
the documentation of these parameters.
GATEWAY=183.83.0.1
TYPE=Ethernet
DEVICE=eth0:1
HWADDR=00:21:9B:F3:48:4D
BOOTPROTO=none
NETMASK=255.255.192.0
IPADDR=183.83.15.150
ONBOOT=yes
USERCTL=no
IPV6INIT=no
PEERDNS=yes
Just
add the IP address, netmask and Gateway. Make sure the Device to eth0:1.Once
the configuration file is updated. Save it and restart the network using
service
network restart
Once
the restart is done, check ifconfig to see 2 IP’s configured.
