[AusNOG] (Probably a bit OT) IPv6 oddity

[Mark Smith]

On Tue, 15 Oct 2019, 15:05 Karl Auer, <kauer at biplane.com.au> wrote:

> Had an interesting (to me) case last week. Client rang on his mobile to
> say his phones didn't work and also he couldn't get to his bank or
> anything else - except Google.


Facebook, Netflix, LinkedIn and most if not all things hosted on Akamai
would have worked too over pure IPv6 only. (e.g. theage.com.au works,
although you lose all the IPv4 only advertising ...)

Also, I found I was able to use
> TeamViewer to access one of his PCs.
>
> He's on NBN over FTTC (or maybe FTTN) with Telstra.
>
> Turned out his Telstra router was supplying a valid prefix to
> autoconfigure IPv6 addresses in, but it was not supplying IPv4
> addresses via DHCP. Reset the router and it all came good.
>
> This is the first time I've seen this in the wild where it was not a
> misconfiguration (though I'm the first to admit that "the wild" is more
> of an inoffensive thicket in my case). Is it more common than I think?
>

What, some of the Internet working when you also have IPv6 instead of it
all going away if you just have IPv4?

Imagine if they only had IPv4 - IPv4 is then a single point of failure.

Regards,
Mark.


> Regards, K.
>
> --
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