Re: howto keep always ipv4ll address

[Dan Williams <dcbw redhat com>]

On Fri, 2016-04-15 at 18:22 +0200, Thomas Haller wrote:
> On Fri, 2016-04-15 at 13:36 +0300, matti kaasinen wrote:
> > Hi!
> >
> > Is there way to tell NM (v.0.9.8.10) not to drop ipv4ll address =
> > eth0:avahi interface.
> I don't think that is possible.

To clarify, not possible on NM 0.9.8.  NM 0.9.10 and later make large
efforts to preserve configuration made outside NM.

> > It seems that this dropping happens immediately when dhcp lease is
> > gained. What harm it would do just preserving this interface alias?
> When NetworkManager manages a device, it deletes other addresses on
> that interface because it doesn't know why they are there.
>
>
> On newer versions of NetworkManager, if you add an address (link-
> local
> or not), after NetworkManager activated the device, it would keep it.
> But also there is a race involved, in that the address must not be
> added before NetworkManager starts configuring the interface
> initially.

This actually sounds like the RFEs we've had for a while to allow
multiple addressing schemes.  eg instead of "link-local only" allow
both "auto" and link-local in parallel.  Maybe?

But I think it could be handled with dispatcher scripts too that would
spawn avahi-autoipd --force-bind on the interface that has just been
upped by NM.

Dan