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Re: [Sidrops] [WGLC] draft-ietf-sidrops-roa-considerations-01 - Ends 10/March/2022

Ties de Kock <tdekock@ripe.net> Thu, 10 March 2022 12:33 UTC

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From: Ties de Kock <tdekock@ripe.net>
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Date: Thu, 10 Mar 2022 13:33:00 +0100
Cc: "sidrops@ietf.org" <sidrops@ietf.org>, Tim Bruijnzeels <tim@nlnetlabs.nl>
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To: Randy Bush <randy@psg.com>
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Subject: Re: [Sidrops] [WGLC] draft-ietf-sidrops-roa-considerations-01 - Ends 10/March/2022
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> On 10 Mar 2022, at 13:07, Randy Bush <randy@psg.com> wrote:
> 
>>> the CA, in some thought of saving bandwidth or something, packs data
>>> up into AS-based blobs which the RPs are then supposed to unpack and
>>> reconcile.  where's the win that is worth all that work?
>> 
>> “less objects, smaller”
>> 
>> It sounds like an attractive optimisation on paper.
> 
> "Premature optimization is the root of all evil (or at least most of it)
> in programming.”  -- D Knuth
> 
>> I would need benchmark results (with a rir-sized repo with
>> 1-vrp-one-ROA) to see how much it does in practice.
> 
> i think one would want to measure whole system, from CA repo to the
> router

Might be even better.

My underlying assumption was that - in a static situation - the resulting set of
VRPs, for a fixed input, is the same independent of VRPs.

The dynamic behaviour is an even lager experiment...

>> My mental model: The RPKI is a directed rooted forest. From a single
>> point of view, for all CAs, you see a consistent snapshot for a CA (or
>> encounter a failed fetch).
> 
> [ s/for all/for each/ ? ]

Yes - for each.

> 
>> If there are no split views on the repository content, RPs will
>> eventually see the same updates.
> 
> except the CA PPs publish asynchronously, on varied schedules, etc.
> 
> and the RPs fetch asynchronously.
> 
> and the routers ...

are all “observing points in time on a set of timelines”

(given no split views of repo content, etc)

-Ties

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