Information for ASPA creation

Hello all!

I am currently working on a better ASPA UI in Krill. The goal is to 
provide a bit more confidence when creating an ASPA record that what was 
entered is correct, and, more importantly, does not accidentally break 
things once networks start validating and rejecting routes based on ASPA 
records. The last iteration of that UI can be found here: 
https://github.com/NLnetLabs/krill-ui/pull/58

I believe ARIN supports creating ASPA records, but from what I could 
gather from screenshot I don't think they provide any "hints". I know 
the RIPE NCC does not (currently) do this because there are a lot of 
asterisks; this topic was also discussed during the last RIPE Routing WG 
in Romania 
(https://ripe91.ripe.net/programme/meeting-plan/sessions/30/transcript/).

But just because ARIN and the RIPE NCC don't do it, doesn't mean I 
cannot give it a shot anyway :-)

Currently I do two things:

1. Show the likely AS name when you enter an AS number, to prevent 
simple typos (8283 instead of 8382, etc.);
2. Show which AS numbers appear "to the left" in RIPE RIS (without 
making a claim that they are missing per se, just that they were 
observed) along with their names.

Don't press the button and nothing happens. The button also only appears 
when you have typed something in the providers field to prevent just 
copy pasting whatever it shows as "to the left" in RIS (and 
consequentially forgetting your DDoS providers, or upstreams that RIS 
didn't see, etc.)

But as I am not an operator (apart from AS211321), I want your input as 
well. What is the kind of information you would want (or not want) to 
see before clicking the "Create ASPA" button?

Cordially,
Koen van Hove

PS: This does not affect the CLI and API for Krill at all, it's only the 
web interface.



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