Virtual IP

[Jojo Castro]

Hi all,

I am planning to add virtual IP on our production server. Just to be sure my procedure will not affect the current production, can anyone provide me the "correct and safe" procedure in adding and deleting virtual IP on Linux?

Thanks!

[Ivan Ferreira]

Are you talking about an "alias"? That is, another IP address to the same network adatper?

If so, then you can use:

ifconfig eth0:1

ifconfig eth0:1 192.168.0.1 255.255.255.0

To disable the interface

ifconfig eth0:1 down

[Jojo Castro]

Is this permanent? that this will also be in effect when I reboot the server?

[Jeeshan]

create a file named ifcfg-eth0:0 in /etc/sysconfig/network-scripts folder and enter the following lines

DEVICE=eth0:0 (or whatever you want)
BOOTPROTO=none
ONBOOT=yes
IPADDR=x.x.x.x (your ip address)
NETMASK=x.x.x.x (your net mask)

now this is permanent. then enter the command

#ifup eth0:0

#ping <0 ip="" address="">

or if you wanna make sure you can rebbot the server.

it will not take any effect to any other service.

[Jojo Castro]

This is it? I don't add any information like Broadcast ip etc...?

Thanks

[Jeeshan]

actually no need to add any broadcast IP for this.

[Jojo Castro]

ok thanks

[Jojo Castro]

thanks to all for the replies