ifcfg-ethX voodoo for a second IP on the same interface

[Ed Greshko]

On 04/21/2012 11:20 AM, Sam Varshavchik wrote:
> For testing purposes I need to add a second IP address to eth0.
>
> eth0 is managed by NetworkManager, and uses dhcp.
>
> I know that if I get rid of NetworkManager and put static IP addresses in
> ifcfg-eth0, I can also sprinkle some magic dust into ifcfg-eth0:1, and have the
> second IP address come up together with the first one.
>
> This does not seem to work with a NetworkManager-managed DHCP-based interface.
>
> Basically, is there some voodoo I can throw in a file somewhere that would perform
> the equivalent of:
>
> ip addr add 192.168.0.5 dev eth0 label eth0:1
>
> when eth0 comes up via DHCP, by NetworkManager?
>

Well.....  I think you can only do this with static IP addresses....

But, all you have to do is modify /etc/sysconfig/network-scripts/ifcfg-whatever  to have

IPADDR0=192.168.0.225
IPADDR1=192.168.0.226

for example....

Then you'd see...

2: p2p1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
    link/ether 08:00:27:36:bf:b0 brd ff:ff:ff:ff:ff:ff
    inet 192.168.0.225/24 brd 192.168.0.255 scope global p2p1
    inet 192.168.0.226/24 brd 192.168.0.255 scope global secondary p2p1
    inet6 fe80::a00:27ff:fe36:bfb0/64 scope link
       valid_lft forever preferred_lft foreve



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