Moin, I have been working on a document listing terms & abbreviations used in the context of BGP/Global Routing Operations (leftovers from the cut- down of the attempts to update documents in BCP194): https://datatracker.ietf.org/doc/draft-fiebig-grow-routing-ops-terms/02/ I just setup a web-form to collect further terms & abbreviations people would like to also see in the document; If you have a minute, it would be appreciated if you could scroll the document and drop a few lines on what you would like to see added. https://files.measurement.network/apps/forms/s/CMXjrtCPD8QyG6CAWmSLmg4y (In case anyone is concerned: Responses will only be used to update the I-D, and not for any form of research. ;-)) With best regards, Tobias P.S.: No, I will not open the box of defining what a Tier-1 is; That definition can stay in RFC7454, and I believe it is better not to touch that topic. ;-) -- Dr.-Ing. Tobias Fiebig T +31 616 80 98 99 M tobias@fiebig.nl