IP Aliasing: Difference between revisions
From Leo's Notes
This page was last edited on 14 June 2020, at 21:55.
m Text replacement - "</code>" to "}}" |
mNo edit summary |
||
| (3 intermediate revisions by the same user not shown) | |||
| Line 25: | Line 25: | ||
Under FreeBSD, to add an additional IP address (10.1.1.2, with a netmask of 255.255.255.0) to {{code|re0}}, run: | Under FreeBSD, to add an additional IP address (10.1.1.2, with a netmask of 255.255.255.0) to {{code|re0}}, run: | ||
{{highlight|lang=terminal|code= | |||
# 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]]}} to make it persistent: | The changes above are not persistent and will not survive a reboot. Add the following to {{code|[[/etc/rc.conf]]}} to make it persistent: | ||
{{highlight|lang=terminal|code= | |||
# ifconfig_re0_alias0="10.1.1.2 netmask 255.255.255.255 alias" | |||
}} | |||
[[Category:FreeBSD]] | [[Category:FreeBSD]] | ||
{{Navbox Linux}}[[Category:Linux]] | |||
[[Category:Networking]] | |||
Latest revision as of 21:55, 14 June 2020
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"