[Ssr2-review] Key rollover

[k claffy]

Alain

thanks for this comment.

I also had reservations on this text and asked
the SSAC KSK WP to comment.

On Sat, Jan 18, 2020 at 09:40:12PM +0000, ALAIN AINA via Ssr2-review wrote:
 > Hi Eric and al
 > 
 > Do we have  evidence to back the statement below ?
 > 
 > ====
 > The review team found no evidence that the propagation delay between publication to each of the letters, and then to each of a letter???s instances, is well l understood.  However, propagation delay was an SSR issue as recently as the 2018 KSK rollover, when some instances were observed not to update as fast as others.
 > ====


First of all, I don't understand why anyone would expect
propagation delay to anycast servers all over the world
over all kind of network infrastructure, to be updating
at the same time.   It's physically impossible, afaict.
So maybe I don't understand the distributed system
synchronization concern here, but the world is dealing
with inconsistent propagation delays all over the place.

Anyway, I asked the WP and Jaap responded with:

	As far as I know there was no issue updating the instances of
	the letters. That was business as usual, so they might mean
	something else.

I agree with Alain that some detail is needed, because I
am also underinformed here.

WRTE mentioning SAC063 and 073, I agree, I think these are 
OBE. I know I brought these up, because I thought the 
recommendations was missing context. but as Alain says,
the newer context is the current proposal out for public comment:
https://www.icann.org/public-comments/proposal-future-rz-ksk-rollovers-2019-11-01-en

also note that SSAC is about to release their public comment
into this process (it will ask for more details to go through
another public comment period, but in general SSAC finds the
current proposal acceptable.). 

Alain, to make sure I understand, you still agree that we
should recommend the formal modeling process in Part 2,
but just not refer to 63 and 73? I am fine w that.

k