[dns-wg] Lower TTLs for NS and DS records in reverse DNS delegations

On 11/29/21 10:55 PM, Dave Lawrence wrote:
> I am in favor of this change.  I'd also like if the change was
> accompanied by measurements of the effect on the relevant
> authoritative nameservers to determine whether it would be reasonable
> to reduce the NS TTL even further.

For folks interested in measurement the impact of TTL changes, we did
two studies in the past:

In [0] we look into the trade-offs between long and short TTLs. You can
skip the measurements details and go to Section 6 for the discussion on
pros and cons of longer/shorter TTLs. (closely related to what folks are
posting to this thread).

In [1] we look into the impact of TTLs and caching while auth servers
suffer DDoS.

-- 
/giovane
SIDN Labs


[0] https://www.isi.edu/~johnh/PAPERS/Moura19b.pdf
[1] https://www.isi.edu/~johnh/PAPERS/Moura18b.pdf