On Thu, Oct 17, 2024 at 10:45:29AM +0200, Stefano Brivio wrote:
> On Thu, 17 Oct 2024 16:33:00 +1100
> David Gibson <david@gibson.dropbear.id.au> wrote:
> 
> > After running dhclient -6 we expect the DHCPv6 assigned address to be
> > immediately usable.  That's true with the Fedora dhclient-script (and the
> > upstream ISC DHCP one), however it's not true with the Debian
> > dhclient-script.  The Debian script can complete with the address still
> > in "tentative" state, and the address won't be usable until Duplicate
> > Address Detection (DAD) completes.  That's arguably a bug in Debian (see
> > link below), but for the time being we need to work around it anyway.
> > 
> > We usually get away with this, because by the time we do anything where the
> > address matters, DAD has completed.  However, it's not robust, so we should
> > explicitly wait for DAD to complete when we get an DHCPv6 address.
> > 
> > Link: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1085231
> > 
> > Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
> > ---
> >  test/passt/dhcp       | 2 ++
> >  test/pasta/dhcp       | 2 ++
> >  test/two_guests/basic | 3 +++
> 
> What about the equivalent cases in passt_in_ns/dhcp and perf/passt_tcp?

Oops, somehow I missed those.  Will fix and respin.

-- 
David Gibson (he or they)	| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you, not the other way
				| around.
http://www.ozlabs.org/~dgibson