nanog mailing list archives
Re: DNS pulling BGP routes?
From: Tom Beecher <beecher () beecher cc>
Date: Fri, 8 Oct 2021 10:06:17 -0400
In facebook case, it was combined with poor understanding on short/long expiration period to cause the disaster.
Still, no. The CAUSE of the outage was all of the FB datacenters being completely disconnected from their backbone, and thus the internet. DNS breaking was a direct RESULT of that. Even if FB's DNS was happily still providing answers to IPs that were still unreachable, they were still horked. Could their DNS design possibly have contributed to some delay in the RESTORATION phase? Perhaps. But with the volume of traffic they do, that was certainly going to take a while anyways. On Fri, Oct 8, 2021 at 5:17 AM Masataka Ohta < mohta () necom830 hpcl titech ac jp> wrote:
Sabri Berisha wrote:Let's for a moment contemplate about the sheer magnitude of their operation. With almost 3 billion users worldwide, can you imaginetheamount of DNS queries they have to process? Their scale is unprecedented.That's what I predicted about 20 years ago, which is why I proposed to have anycast name servers analyzing its implications. As such I'm sure anycast route withdrawal ignoring rfc3258 is poor engineering. Scalable solutions can be constructed only with careful theoretical analysis, against which random hacks, which may work 99% of the time, are just harmful. In facebook case, it was combined with poor understanding on short/long expiration period to cause the disaster. Masataka Ohta
Current thread:
- Re: DNS pulling BGP routes?, (continued)
- Re: DNS pulling BGP routes? William Herrin (Oct 07)
- Re: DNS pulling BGP routes? Mark Tinka (Oct 07)
- Re: DNS pulling BGP routes? Masataka Ohta (Oct 07)
- Re: DNS pulling BGP routes? William Herrin (Oct 07)
- Re: DNS pulling BGP routes? Masataka Ohta (Oct 07)
- Re: DNS pulling BGP routes? William Herrin (Oct 07)
- Re: DNS pulling BGP routes? Masataka Ohta (Oct 07)
- Re: DNS pulling BGP routes? Sabri Berisha (Oct 07)
- Re: DNS pulling BGP routes? Mark Tinka (Oct 07)
- Re: DNS pulling BGP routes? Masataka Ohta (Oct 08)
- Re: DNS pulling BGP routes? Tom Beecher (Oct 08)
- Re: DNS pulling BGP routes? Carsten Bormann (Oct 08)
- Re: DNS pulling BGP routes? William Herrin (Oct 08)
- Re: DNS pulling BGP routes? Masataka Ohta (Oct 08)
- Re: DNS pulling BGP routes? Christopher Morrow (Oct 08)
- Re: DNS pulling BGP routes? Masataka Ohta (Oct 09)
- Re: DNS pulling BGP routes? Bill Woodcock (Oct 09)
- Re: DNS pulling BGP routes? Masataka Ohta (Oct 09)
- Re: DNS pulling BGP routes? Christopher Morrow (Oct 11)
- Re: DNS pulling BGP routes? Matthew Petach (Oct 11)
- Re: DNS pulling BGP routes? Masataka Ohta (Oct 12)