[atlas] Assigned AS vs. Advertising AS
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ripe.net at toppas.net
ripe.net at toppas.net
Wed Jun 29 18:05:44 CEST 2022
Hi Gert, thanks for your clarification! But you still get my point, do you? If a prefix was assigned to an entity other than the one that is advertising the prefix, for example: 80.187.128.0/22 Announcing: Deutsche Telekom AG (AS3320) Assigned: T-Mobile Deutschland GmbH (AS44178) The information (original prefix receiver) is stored in the RIPE DB, right? It could be compared to what we see via BGP. I am aware that a single entity can have multiple AS numbers, but when different entities are "involved", more transparency would be great. Or am i missing something here? BR, Simon On 29.06.22 10:54, Gert Doering wrote: > Hi, > > On Wed, Jun 29, 2022 at 10:30:22AM +0200, Simon Brandt via ripe-atlas wrote: >> Another example would be a multi ASN company which announces all >> prefixes from a single ASN via BGP, even though the prefixes are >> assigned to various AS numbers. Since the RIRs do have the information, >> to which AS a specific prefix is assigned to, > prefixes are not assigned to "AS" numbers, ever. > > prefixes are assigned to entities, as are AS numbers. > > ROAs and/or route(6): objects are used to tie both together - and it's > in the authority of the network (prefix) holder to state which AS is > allowed and expected to announce a given prefix, not the RIR. > > Repeat: the RIR has no say in "which AS is tied a prefix". > > Gert Doering > -- NetMaster -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://lists.ripe.net/ripe/mail/archives/ripe-atlas/attachments/20220629/5470f81c/attachment.html>
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