Sriram, Kotikalapudi (Fed) wrote on 10/03/2022 03:31:
Nick and all,
Thank you. What you all shared/discussed is very useful info.
Almost all RS's are transparent these days. Usually IXPs go to
lengths to ensure that the RS ASN doesn't appear in the AS path.
Good to know that. Well, that means there can be an occasional RS
that is non-transparent. When there is a non-transparent RS, could
there be big ISPs (Tier-1, Tier-2) present there as RS-clients?
I would seriously doubt it. There are some "Tier 1" and "Tier 2"
providers who peer using route servers at IXPs, but it's a bit unusual
(and entertaining to hear them strenuously denying that this ever happens).
Non-transparent RS's were used until a couple of years ago but I'm not
aware of any left at this point. Even when non-transparent RS's were
more widespread, I would have expected the intersection of these two
groups to be null, and that if there were an intersection, the
Tier1/Tier2 providers would not be upset if those paths were dropped /
marked as invalid.
The ASPA verification draft treats the relationship of RS to
RS-client as similar to that of Provider to Customer. Seems
reasonable? The AS of an RS client includes the RS's AS in its ASPA
as a "Provider".
yes, this is reasonable.
Nick
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