Over-utilisation of v6 neighbour slots

Gert Doering gert at space.net
Thu Oct 24 14:47:52 CEST 2013


On Thu, Oct 24, 2013 at 08:37:25AM -0400, Bill Owens wrote:
> > Given their ignorance of collateral damage done to operators, users
> > and IPv6 deployment in general by their implementation of Happy
> > Eyeballs (alias "Hampering Eyeballs"), I have zero hope.
> My recollection of the complaint about Apple's implementation is that it 
> doesn't bias the choice in favor of IPv6; is that the root of the problem? 

It is, because it causes a lot of nastiness as a side effect.

Most annoying for me: non-determinism, so going to a web page and pressing
"reload" a few times will flip-flop between IPv4 and IPv6 (which, if one
is working and one is not, will make troubleshooting harder than necessary).

Most annoying for people that run large-scale IPv4 NATs: lots of extra load
is put on the NAT that would not be necessary if the client would just do

Microsoft's implementation ("prefer IPv6 if it seems to work to a test 
host") is not without it's own problems, but overall, much less unfriendly 
to network elements and sysadmins.

Gert Doering
        -- NetMaster
have you enabled IPv6 on something today...?

SpaceNet AG                        Vorstand: Sebastian v. Bomhard
Joseph-Dollinger-Bogen 14          Aufsichtsratsvors.: A. Grundner-Culemann
D-80807 Muenchen                   HRB: 136055 (AG Muenchen)
Tel: +49 (0)89/32356-444           USt-IdNr.: DE813185279

More information about the ipv6-ops mailing list