IP Aliasing: Difference between revisions
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This page was last edited on 25 February 2015, at 23:36.
Created page with "IP Aliasing is the process of adding additional IP addresses to a single network interface. == FreeBSD == Under FreeBSD, to add an additional IP address (10.1.1.2, with a net..." |
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IP Aliasing is the process of adding additional IP addresses to a single network interface. | IP Aliasing is the process of adding additional IP addresses to a single network interface. | ||
== Linux == | |||
To add an additional IP address to a network device, such as eth0: | |||
ifconfig eth0:0 10.1.1.2 up | |||
To make it persistent, create a ifcfg script with the IP changes: | |||
cp /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0:0 | |||
vi /etc/sysconfig/network-scripts/ifcfg-eth0:0 | |||
DEVICE=eth0:0 | |||
NAME=eth0:0 | |||
IPADDR=10.1.1.2 | |||
NETMASK=255.255.255.0 | |||
ONBOOT=yes | |||
Ensure that there is no gateway set in the ifcfg-eth0 file because it should be set in /etc/sysconfig/network. | |||
== FreeBSD == | == FreeBSD == | ||
Revision as of 23:36, 25 February 2015
IP Aliasing is the process of adding additional IP addresses to a single network interface.
Linux
To add an additional IP address to a network device, such as eth0:
ifconfig eth0:0 10.1.1.2 up
To make it persistent, create a ifcfg script with the IP changes:
cp /etc/sysconfig/network-scripts/ifcfg-eth0 /etc/sysconfig/network-scripts/ifcfg-eth0:0 vi /etc/sysconfig/network-scripts/ifcfg-eth0:0 DEVICE=eth0:0 NAME=eth0:0 IPADDR=10.1.1.2 NETMASK=255.255.255.0 ONBOOT=yes
Ensure that there is no gateway set in the ifcfg-eth0 file because it should be set in /etc/sysconfig/network.
FreeBSD
Under FreeBSD, to add an additional IP address (10.1.1.2, with a netmask of 255.255.255.0) to re0, run:
ifconfig re0 10.1.1.2 netmask 255.255.255.255 alias
The changes above are not persistent and will not survive a reboot. Add the following to /etc/rc.conf to make it persistent:
ifconfig_re0_alias0="10.1.1.2 netmask 255.255.255.255 alias"