[LINK] RFI: Telstra DNS outage

[Sam Silvester]

On Fri, May 13, 2016 at 8:32 AM, Roger Clarke <Roger.Clarke at xamax.com.au>
wrote:

>
> Is the largest provider in the country utterly incompetent?
>
> Or is there something important about Internet architecture that I fail to
> understand?
>

A couple of considerations:

Just because two IP addresses have the same first three leading octets, it
doesn't necessarily follow that they are in the same subnet. They are
likely single IP adresses with a /32 prefix, and probably don't represent
the underlying servers on a 1:1 basis.

As Avi mentioned, with anycast a couple of service IP addresses like the
two above can be announced in a lot of locations.

Sam