DNS pulling BGP routes?

Jon Lewis jlewis at lewis.org
Wed Oct 6 21:58:32 UTC 2021

On Wed, 6 Oct 2021, Michael Thomas wrote:

> On 10/6/21 2:33 PM, William Herrin wrote:
>>  On Wed, Oct 6, 2021 at 10:43 AM Michael Thomas <mike at mtcc.com> wrote:
>>>  So if I understand their post correctly, their DNS servers have the
>>>  ability to withdraw routes if they determine are sub-optimal (fsvo).
>>  The servers' IP addresses are anycasted. When one data center
>>  determines itself to be malfunctioning, it withdraws the routes so
>>  that users will reach a different data center that is, in theory,
>>  still functioning.
> Ah, I was wondering if the anycast part was the relevant bit. But doesn't it 
> seem odd that it would be intertwined with the DNS infrastructure?

People have been anycasting DNS server IPs for years (decades?).  So, no.

  Jon Lewis, MCP :)           |  I route
  StackPath, Sr. Neteng       |  therefore you are
_________ http://www.lewis.org/~jlewis/pgp for PGP public key_________

More information about the NANOG mailing list