IP Aliasing: Difference between revisions
From Leo's Notes
This page was last edited on 24 February 2017, at 19:14.
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== FreeBSD == | == FreeBSD == | ||
Under FreeBSD, to add an additional IP address (10.1.1.2, with a netmask of 255.255.255.0) to {{code|re0 | Under FreeBSD, to add an additional IP address (10.1.1.2, with a netmask of 255.255.255.0) to {{code|re0}}, run: | ||
ifconfig re0 10.1.1.2 netmask 255.255.255.255 alias | 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 {{code|[[/etc/rc.conf]] | The changes above are not persistent and will not survive a reboot. Add the following to {{code|[[/etc/rc.conf]]}} to make it persistent: | ||
ifconfig_re0_alias0="10.1.1.2 netmask 255.255.255.255 alias" | ifconfig_re0_alias0="10.1.1.2 netmask 255.255.255.255 alias" | ||
[[Category:FreeBSD]] | [[Category:FreeBSD]] | ||
Revision as of 19:14, 24 February 2017
IP Aliasing is the process of adding additional IP addresses to a single network interface.
Linux
Use the ip command to add or remove IP addresses from an interface.
# ip address add $ip/$mask dev $interface
# ip address del $ip/$mask dev $interface
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
# cat /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"