[CentOS] Simple IP Question

[Chris Boyd]

On Jul 17, 2008, at 11:39 AM, Matt wrote:

> I have a server located remotely running CentOS 5.x.  I need to have
> two IP's on the same interface.  So I have this:
>
> /etc/sysconfig/network-scripts/ifcfg-eth0
> DEVICE=eth0
> BOOTPROTO=none
> BROADCAST=69.x.x.199
> HWADDR=00:x:x:x:c6:10
> IPADDR=69.x.x.194
> NETMASK=255.255.255.248
> NETWORK=69.x.x.192
> ONBOOT=yes
> GATEWAY=69.x.x.193
> TYPE=Ethernet
>
> So I added this:
>
> /etc/sysconfig/network-scripts/ifcfg-eth0:0
> DEVICE=eth0
> BOOTPROTO=none
> BROADCAST=69.x.x.199
> HWADDR=00:x:x:x:c6:10
> IPADDR=69.x.x.195
> NETMASK=255.255.255.248
> NETWORK=69.x.x.192
> ONBOOT=yes
> GATEWAY=69.x.x.193
> TYPE=Ethernet

I got tripped up on this a while back.  You need to have  
DEVICE=eth0:0 in the second script, otherwise you just overwrite the   
previously assigned IP address.