nanog mailing list archives
Re: DNS pulling BGP routes?
From: Masataka Ohta <mohta () necom830 hpcl titech ac jp>
Date: Wed, 13 Oct 2021 22:26:37 +0900
Matthew Petach wrote:
With an anycast setup using the same IP addresses in every location, returning SERVFAIL doesn't have the same effect, however, because failing over from anycast address 1 to anycast address 2 is likely to be routed to the same pop location, where the same result will occur.That's why that is a bad idea. Alternative name servers with different IP addresses should be provided at separate locations.
Sure. But that doesn't do anything to help prevent the type of outage that hit Facebook, which was the point I was trying to make in my response. Facebook did use > different IP addresses, and it didn't matter, because the
> underlying health of the network is what was at issue, > not the health of the nameservers. A possible solution is to force unbundling of CDN providers and transit providers by antitrust agencies. Then, CDN providers can't pursue efficiency only to kill fundamental redundancy of DNS. For network neutrality, backbone providers *MUST* be neutral for contents they carry. However, CDN providers having their own backbone are using their backbone for contents they prefer, which is *NOT* neutral at all. As such, access/retail providers may pay for peering with neutral backbone providers for their customers but should reject direct peering request from, actively behaving against neutrality, CDN providers.
I agree with you--different IP addresses should be used in different geographic locations, even with anycast setups. But people need to also recognize that's not a panacea that solves everything, and that it wouldn't have changed the nature of the outage last week.
We should recognize the fundamental difference between independent, thus neutral, backbone providers and CDN providers with anti-neutral backbone of their own. Masataka Ohta
Current thread:
- Re: DNS pulling BGP routes?, (continued)
- 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)
- Re: DNS pulling BGP routes? Christopher Morrow (Oct 13)
- Re: DNS pulling BGP routes? Masataka Ohta (Oct 13)
- Re: DNS pulling BGP routes? Mark Tinka (Oct 13)
- Re: DNS pulling BGP routes? Masataka Ohta (Oct 16)
- Re: DNS pulling BGP routes? Mark Tinka (Oct 17)
- Re: DNS pulling BGP routes? Masataka Ohta (Oct 18)
- Re: DNS pulling BGP routes? Mark Tinka (Oct 18)