Create a Virtual IP Address in Linux

Create a Virtual IP Address in Linux

Category : How-to

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terminal ifconfigThis post will detail how to set ip a virtual IP address and assign an interface to handle the traffic in the Linux OS. This may not work for all Linux distros but it should be accurate for most.

Run the ifconfig command to see what interfaces are available.


Run the ifconfig command again, however this time create a VIP using the following syntax.

ifconfig [INTERFACE] [IP_ADDRESS] netmask [NETMASK]


ifconfig eth0:1 netmask

Substitute INTERFACE = the interface which this VIP will be based on, IP_ADDRESS = the new VIP IP address (note: this must exist) and NETMASK = the netmask of the new VIP.

Update the routing table using arping.

arping -q -U -c 3 -I [INTERFACE] [VIP_IP_ADDRESS]


arping -q -U -c 3 -I eth0

Substitute INTERFACE with the interface to bind this VIP to and VIP_IP_ADDRESS to the VIP IP address which was assigned in the above ifconfig statement.

Note: changes made will be lost when the machine is rebooted.

See this blog post to see how to make a permanent virtual IP address.

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