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.
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Jon Lewis, MCP :) | I route
StackPath, Sr. Neteng | therefore you are
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