nanog mailing list archives
Re: DNS pulling BGP routes?
From: Masataka Ohta <mohta () necom830 hpcl titech ac jp>
Date: Sun, 10 Oct 2021 00:15:48 +0900
Bill Woodcock wrote:
It may be that facebook uses all the four name server IP addresses in each edge node. But, it effectively kills essential redundancy of DNS to have two or more name servers (at separate locations) and the natural consequence is, as you can see, mass disaster.Yep. I think we even had a NANOG talk on exactly that specific topic a long time ago. https://www.pch.net/resources/Papers/dns-service-architecture/dns-service-architecture-v10.pdf
Yes, having separate sets of anycast addresses by two or more pops should be fine. However, if CDN provider has their own transit backbone, which is, seemingly, not assumed by your slides, and retail ISPs are tightly connected to only one pop of the CDN provider, the CDN provider may be motivated to let users access only one pop killing essential redundancy of DNS, which should be overengineering, which is my concern of the paragraph quoted by you. Masataka Ohta
Current thread:
- Re: DNS pulling BGP routes?, (continued)
- 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)
- Re: DNS pulling BGP routes? Matthew Petach (Oct 11)
- Re: DNS pulling BGP routes? Masataka Ohta (Oct 12)
- Re: DNS pulling BGP routes? Matthew Petach (Oct 12)
- Re: DNS pulling BGP routes? Masataka Ohta (Oct 13)
- Re: DNS pulling BGP routes? Tom Beecher (Oct 13)
- Re: DNS pulling BGP routes? Masataka Ohta (Oct 13)
- Re: DNS pulling BGP routes? Tom Beecher (Oct 13)