Re: How to configure a DHCP + (2nd) Static address (eg on eth0+eth0:0)?

[Dan Williams <dcbw redhat com>]

On Thu, 2015-10-01 at 13:34 -0400, Derek Atkins wrote:
> Hi Dan,
>
> On Thu, October 1, 2015 12:49 pm, Dan Williams wrote:
>
> > Yes, you need a matching ifcfg file for the base interface.  So you need
> > both ifcfg-eth0 and ifcfg-eth0:0.  See the examples, eg ifcfg-aliasem0
> > and ifcfg-aliasem0:1.
> >
> > The alias file should only have DEVICE and IPADDR fields; and DEVICE
> > must match that of the parent ifcfg file.  They are intimately tied
> > together in the old initscripts, and the ifcfg-rh plugin remains
> > compatible with those.
> >
> > When NetworkManager sees the base file, it will also look for alias
> > files, and will add the IP address from the alias file to the main
> > connection's IP address list along with the label.  So even with two
> > ifcfg files, you will only have one connection and you should see *both*
> > IP addresses in that one connection.  When the connection is activated,
> > NM sends the label to the kernel, so /sbin/ip will show both addresses
> > on one interface, but /sbin/ifconfig will show two interfaces each with
> > one address, per its ignorance of the real situation.
>
> Apparently this still isn't working.  I did the following:
>
> # cat /etc/sysconfig/network-scripts/ifcfg-eth0
> TYPE=Ethernet
> BOOTPROTO=dhcp
> DEFROUTE=yes
> IPV4_FAILURE_FATAL=no
> UUID=3a02edd8-e82d-4dca-a336-933e9177f4cd
> DEVICE=eth0
> ONBOOT=yes
> HWADDR=00:1f:7b:b2:14:42
> IPV6_FAILURE_FATAL=no
> NAME=eth0
> # cat /etc/sysconfig/network-scripts/ifcfg-eth0:1
> DEVICE=eth0:1
> IPADDR=192.168.x.y

I tested the config here and at least git master NM accepts the DHCP +
aliases configuration.  After doing 'nmcli con reload' could you do
"nmcli con show 3a02edd8-e82d-4dca-a336-933e9177f4cd" and post the
output for the IPv4 block?

Dan

> and after an nmcli con reload it still doesn't provide the alias address. 
> Nor after a reboot.
>
> I'm sur I'm still missing *something* but I'm at a loss now.
>
> > Dan
>
> -derek