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January 2023

2 participants
2 discussions

some thoughts on add-path and bmp at ripe/ris
by Randy Bush 17 Mar '23

17 Mar '23

i have some small thoughts on add-path and BMP in RIPE/RIS. this may hinder more than help, unfortunately. as a researcher, of course i would love a wider view into the AS graph and the views of as many ASs as possible. nom nom. but ... add-path, if not done very carefully, and documented in detail for each peer, will produce views i will not understand. it is analogous to not knowing what view a BGP peer gives RIS today. did it give me a full Nth view into peer X? is the path that of a peer, a customer, a provider? and add-path is worse because it prunes in configuration and vendor- dependent and otherwise unpredictable ways. and, as an operator if P is a RIS peer, and they give RIS BMP showing their input from their peers, upstreams, and customers, those peers, upstreams, and customers have not given thir consent to have their internals published! if they want to have RIS publish their internals, they would peer with RIS and choose what view they present. and, of course, the researcher does not know what view, peer, upstream, or customer P's BMP peer is giving them. same problem as above under add-path. randy

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Re: [mat-wg] [atlas] Proposal: Remove support for non-public measurements [ONLY-PUBLIC]
by Stephen Strowes 11 Jan '23

11 Jan '23

Hi, On 12/31/22 18:37, Randy Bush wrote: > hi robert, > > and thanks > >> I seem to remember that a typical non-public measurement is a one-off, >> and as such the data volume collected and stored is likely to be >> relatiely low. > interesting There is an old (late 2016) labs post worth referring to for this discussion [1]. In 2020 there was a survey of the users of private measurements [2], which was intended to get feedback on their actual use-cases. I seem to recall a very small set of respondents from an already small set of surveyees. The results are probably lost in the ether. I feel there's an aspect of the broader question that is rarely touched upon in these discussions: would user behaviour actually change if non-public measurements went away? I'm never sure how many use-cases are truly secret. Cheers, S. [1] https://labs.ripe.net/author/kistel/non-public-measurements-in-ripe-atlas/ [2] https://www.ripe.net/participate/forms/apply/ripe-atlas-private-measurement… > >> I don't have the numbers readily available to me at this moment, but >> we can certainly dig up recent statistics about this. > i did not intend to create a lot of work for you. but, as a measurement > person, i am a bit fond of basing decisions on facts. > > randy >

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