Re: DNS pulling BGP routes?

[Masataka Ohta <mohta () necom830 hpcl titech ac jp>]

William Herrin wrote:

> > If they are not using standard expire mechanism expecting
> > internal data still accessible even after external data
> > has expired, there is difference.
>
> I give up.

To accept the reality of disastrous facebook failure? I know.

> Although you have no knowledge whatsoever about how
> Facebook implemented their DNS

   https://engineering.fb.com/2021/10/05/networking-traffic/outage-details/

   our DNS servers disable those BGP advertisements if they
   themselves can not speak to our data centers

   The end result was that our DNS servers became unreachable
   even though they were still operational.

means their DNS servers were serving the zone, even after
they recognize their zone data were too old, that is, expired.

> you are obviously correct in all things.

If you think so, it's your problem, I'm afraid.

                                                Masataka Ohta