[Pkg-dns-devel] Bug#720864: Bug#720864: Fails to bind IPv6 socket during DAD

[martin f krafft]

also sprach Robert Edmonds <edmonds at debian.org> [2016-03-01 20:14 +0100]:
> I like the first suggestion even more:
> 
>     Watch rtnetlink and react properly to network configuration changes
>     as they happen. This is usually the nicest solution, but not always
>     the easiest.
> 
> But that is significantly more development work.

Would this enable me to say that unbound should just listen on iface
"eth0"?

> By the way, have you tried "ip-transparent: yes"? According to

No!

> I wonder if IP_FREEBIND would actually be a better fit for the
> functionality described in unbound.conf than IP_TRANSPARENT, since
> unbound.conf doesn't mention any of the proxying properties of
> IP_TRANSPARENT.

I agree.

Meanwhile, I found that adding

  dad-attempts 200

(standard ifupdown feature)

to the iface inet6 stanza in /etc/network/interface would make ifup
wait up to 20 seconds for the DAD to complete… and block meanwhile.
This is enough for my interface to come up with a non-tentative
address and so by the time boot resumes, the address is fully
configured.

-- 
 .''`.   martin f. krafft <madduck at d.o> @martinkrafft
: :'  :  proud Debian developer
`. `'`   http://people.debian.org/~madduck
  `-  Debian - when you have better things to do than fixing systems
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