[AusNOG] Facebook v6 early... kinda

[Scott Howard]

On Tue, May 22, 2012 at 7:58 AM, Skeeve Stevens <
skeeve+ausnog at eintellego.net> wrote:

> Hey all,
>
> This is a little odd:
>
[...]

> Facebook have turned ipv6 on www., but not facebook.com (which is what I
> type).
>
> They don't even have the same v4 addresses.... very weird.
>

Which bit specifically is odd?

If you think the fact they have turned on IPv6 is odd, then that worries
me...

If it's the other two points, that's not unusual.  The "domain"
www.facebook.com will be served by a load balancer (the NS records of
glbX.facebook.com give that away), where the domain facebook.com itself is
probably more likely served by a more "normal" DNS server.

A HTTP redirect will send users from facebook.com to the GLB'ed
www.facebook.com.

Many (most?) large domains are setup this way.

The partial IPv6 support probably just means that they have enabled it on
their GLB but not on the facebook.com DNS servers.

  Scott.
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