[dns-operations] How .org name server handle large DNS response?

Viktor Dukhovni ietf-dane at dukhovni.org
Wed Dec 19 09:33:13 UTC 2018

On Wed, Dec 19, 2018 at 05:09:44PM +0800, Davey Song(宋林健) wrote:

> I’m curious on how .org authoritative server handle large DNS response ? Is
> there any notable impact of IPv6 fragment issues on .org servers? 
> I ask .org because .org generates large DNS response (1625 octets) when you
> dig dnskey org. +dnssec, which makes the issue more common. 
> Is there Afilias people in the mailing list? Did you ever consider ATR
> (draft-song-atr-large-resp) for the issue? We need a talk. 

Rather than ATR, I'd recommend:

    1. Eliminate unnecessary DNSKEY RRSIGs, one (just by the active KSK)
       is enough (c.f. .com), but .org sends three, two KSK signatures and
       even one ZSK signature.  Perhaps there's a good reason for this, but
       it would be good to find a more svelte design.

    2. Switch to algorithm 13, ECDSA with P-256


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