ipv4ll address in parallel with DHCP

haskin · 10-13-2010, 09:15 AM

I would like to define a IPv4LL address (169.254.0.0/16) in parallel with the DHCP address received from the server on the same network card.

I tried to modify /etc/network/interfaces to that effect (see below), but either I only manage to get one of the two at any time.

auto lo
iface lo inet loopback

auto eth0 eth0:1

iface eth0 inet dhcp
iface eth0:1 inet ipv4ll

Any hints?

moniker117 · 10-15-2010, 12:07 AM

Quote:

Originally Posted by haskin

I would like to define a IPv4LL address (169.254.0.0/16) in parallel with the DHCP address received from the server on the same network card.

I tried to modify /etc/network/interfaces to that effect (see below), but either I only manage to get one of the two at any time.

auto lo
iface lo inet loopback

auto eth0 eth0:1

iface eth0 inet dhcp
iface eth0:1 inet ipv4ll

Any hints?

Are you trying to have two IPs on the same card? I've never tried something like that, but have you considered trying to set up some sort of virtual network device? It seems to me that you would need to tell the computer that you have two logical network devices (both point to the same hardware) then have each logical device use a separate protocol to get an IP address.

haskin · 10-16-2010, 11:20 AM

Quote:

Are you trying to have two IPs on the same card? I've never tried something like that, but have you considered trying to set up some sort of virtual network device? It seems to me that you would need to tell the computer that you have two logical network devices (both point to the same hardware) then have each logical device use a separate protocol to get an IP address.

Yes, I am trying to have both addresses on the same NIC, to implement an ad-hoc network in addition to the standard (DHCP based) network.

When I set the 2nd interface (eth0:1) to a static IP this script works, however when I set it to ipv4ll the 2nd interface is ignored.