[dns-operations] [Ext] DNS Flag Day 2020 will become effective on 2020-10-01

[Viktor Dukhovni]

On Thu, Sep 17, 2020 at 08:50:33AM -0700, Paul Vixie wrote:

> Mark Andrews wrote on 2020-09-16 15:20:
> > ... O(10^6)
> > But DNS traffic doesn’t need those sized packets even for zone transfers.

Not today, but DNSSEC with post-quantum signatures might prove tough to
squeeze into even 1400 bytes...   10^6 sounds quite remote, but I'm
already seeing (just shy of) 64KB frames between the kernel and 40Gb
NICs that do TCP reassembly and segmentation in hardware.

> i feel the same. but i felt that way about 64K and 640K RAM, and was 
> wildly wrong. in practical terms i think the old 4K EDNS bufsize default 
> will likely remain relevant to DNS, but two things: first, there are 
> other things on the internet besides DNS; second, an evolving packet 
> size that scales with bit rate would and still can obviate some of the 
> things we use fragmentation, or TCP, or shortly QUIC, to do. the tyranny 
> of 1500 must end, for the sake of our collective future.

I agree, but getting there will not be easy.  But indeed over-optimising
for the present is an impediment.  Step 1 might be to actually agree on
the

-- 
    Viktor.