[AusNOG] Au IPv6 doubling?

[Mark Delany]

> Oh anyway.. this is about IPv6 isn't it? ??
...
> The Apple announcement should hopefully speed things up.

I'm not sure why people think this.

As far as I understand it, the announcement is merely stating that
apps must work in an environment where there is only a v6 interface
available on the device. This is presumably to support operators that
can't get - or don't want to buy - v4 addresses. (Or operators that
don't want to buy ugly and costly CGNATs).

This will have no effect on dual-stacked environments and no effect on
the amount of v6 traffic generated. It's merely making sure that there
are no legacy v4 dependencies in app code, such as size and format of
network addresses. Given that most of the networking is abstracted
away from apps on iOS, most apps will not have to make any changes at
all to accomodate this requirement.

As far as speeding things up, the Apple stacks have long supported and
favoured v6 so any increase in traffic s still completely dependent on
whether operators issue v6 addresses and whether end-points advertise
them.


Mark.