dhcpcd-discuss

Hi Jason

On 24/06/2017 22:20, Jason A. Donenfeld wrote:
> On Sat, Jun 24, 2017 at 09:30:20AM +0100, Roy Marples wrote:
> > What dhcpcd is supposed to do is to use the lease on the interface with
> > the lowest metric when there are multiple active leases with the same IP
> > address.
>
> This behavior is really not good in practice and does not work well for
> me. What I'd prefer to see is that the IP address is assigned to *both*
> interfaces, so that when the one with the lower metric goes down (i.e. I
> unplug the ethernet cable so it falls back to wifi), the connection
> keeps working and simply falls back to the next one. This would really
> solve many of my problems.

I'm happy to entertain the idea.
Why don't you post a task at https://dev.marples.name and I'll see if I 
can do something over the weekend for it.

> If for some unfortunate reason you're not willing to do that, perhaps
> you could at least make this an option?
>
> If neither, then maybe the better behavior would be for dhcpcd to
> reassign the IP address when one interface goes down to the
> still-existing interface. This would achieve ± the same as above, but
> would be slightly less error prone.

It already does this .....

> The current behavior also rarely actually works, with it being quite
> unreliable which interface winds up getting the IP. The whole current
> mechanism is just broken.

It's odd as it works really well for me.
I actually had a hard time getting it to crash - I had to ensure that 
the wired interface started down and stayed down until the wifi reached 
the BOUND state and then start the wired interface by hand.

Roy